Create an identity at startup if the database doesn't exist.

briar-android/src/net/sf/briar/android/BriarService.java

@@ -56,7 +56,7 @@ public class BriarService extends RoboService {
 		b.setContentIntent(pi);
 		b.setOngoing(true);
 		startForeground(1, b.build());
-		// Start the services in the background thread
+		// Start the services in a background thread
 		new Thread() {
 			@Override
 			public void run() {
@@ -92,8 +92,11 @@ public class BriarService extends RoboService {
 	private void startServices() {
 		try {
 			if(LOG.isLoggable(INFO)) LOG.info("Starting");
-			db.open(false);
-			if(LOG.isLoggable(INFO)) LOG.info("Database opened");
+			boolean reopened = db.open();
+			if(LOG.isLoggable(INFO)) {
+				if(reopened) LOG.info("Database reopened");
+				else LOG.info("Database created");
+			}
 			keyManager.start();
 			if(LOG.isLoggable(INFO)) LOG.info("Key manager started");
 			int pluginsStarted = pluginManager.start(this);

briar-android/src/net/sf/briar/android/HomeScreenActivity.java

@@ -3,9 +3,12 @@ package net.sf.briar.android;
 import static android.view.Gravity.CENTER;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static java.util.logging.Level.INFO;
+import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.Executor;
 import java.util.logging.Logger;
 
 import net.sf.briar.R;
@@ -14,7 +17,11 @@ import net.sf.briar.android.BriarService.BriarServiceConnection;
 import net.sf.briar.android.contact.ContactListActivity;
 import net.sf.briar.android.groups.GroupListActivity;
 import net.sf.briar.android.messages.ConversationListActivity;
-import net.sf.briar.android.widgets.CommonLayoutParams;
+import net.sf.briar.api.LocalAuthor;
+import net.sf.briar.api.android.DatabaseUiExecutor;
+import net.sf.briar.api.android.ReferenceManager;
+import net.sf.briar.api.db.DatabaseComponent;
+import net.sf.briar.api.db.DbException;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.IBinder;
@@ -28,6 +35,8 @@ import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.ProgressBar;
 
+import com.google.inject.Inject;
+
 public class HomeScreenActivity extends BriarActivity {
 
 	private static final Logger LOG =
@@ -35,163 +44,49 @@ public class HomeScreenActivity extends BriarActivity {
 
 	private final BriarServiceConnection serviceConnection =
 			new BriarServiceConnection();
-	private final List<Button> buttons = new ArrayList<Button>();
 
-	public HomeScreenActivity() {
-		super();
-	}
+	@Inject private ReferenceManager referenceManager = null;
+	@Inject @DatabaseUiExecutor private Executor dbUiExecutor = null;
+
+	// Fields that are accessed from background threads must be volatile
+	@Inject private volatile DatabaseComponent db = null;
 
 	@Override
 	public void onCreate(Bundle state) {
 		super.onCreate(null);
-		if(LOG.isLoggable(INFO)) LOG.info("Created");
-
-		// If this activity was launched from the notification bar, quit
-		if(getIntent().getBooleanExtra("net.sf.briar.QUIT", false)) {
+		Intent i = getIntent();
+		boolean quit = i.getBooleanExtra("net.sf.briar.QUIT", false);
+		long handle = i.getLongExtra("net.sf.briar.LOCAL_AUTHOR_HANDLE", -1);
+		if(quit) {
+			// The activity was launched from the notification bar
+			showSpinner();
 			quit();
+		} else if(handle != -1) {
+			// The activity was launched from the setup wizard
+			showSpinner();
+			storeLocalAuthor(referenceManager.removeReference(handle,
+					LocalAuthor.class));
 		} else {
-			ListView.LayoutParams matchParent =
-					new ListView.LayoutParams(MATCH_PARENT, MATCH_PARENT);
-
-			Button contactsButton = new Button(this);
-			contactsButton.setLayoutParams(matchParent);
-			contactsButton.setBackgroundResource(0);
-			contactsButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.social_person, 0, 0);
-			contactsButton.setText(R.string.contact_list_button);
-			contactsButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					startActivity(new Intent(HomeScreenActivity.this,
-							ContactListActivity.class));
-				}
-			});
-			buttons.add(contactsButton);
-
-			Button messagesButton = new Button(this);
-			messagesButton.setLayoutParams(matchParent);
-			messagesButton.setBackgroundResource(0);
-			messagesButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.content_email, 0, 0);
-			messagesButton.setText(R.string.messages_button);
-			messagesButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					startActivity(new Intent(HomeScreenActivity.this,
-							ConversationListActivity.class));
-				}
-			});
-			buttons.add(messagesButton);
-
-			Button groupsButton = new Button(this);
-			groupsButton.setLayoutParams(matchParent);
-			groupsButton.setBackgroundResource(0);
-			groupsButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.social_chat, 0, 0);
-			groupsButton.setText(R.string.groups_button);
-			groupsButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					Intent i = new Intent(HomeScreenActivity.this,
-							GroupListActivity.class);
-					i.putExtra("net.sf.briar.RESTRICTED", false);
-					i.putExtra("net.sf.briar.TITLE",
-							getResources().getString(R.string.groups_title));
-					startActivity(i);
-				}
-			});
-			buttons.add(groupsButton);
-
-			Button blogsButton = new Button(this);
-			blogsButton.setLayoutParams(matchParent);
-			blogsButton.setBackgroundResource(0);
-			blogsButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.social_blog, 0, 0);
-			blogsButton.setText(R.string.blogs_button);
-			blogsButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					Intent i = new Intent(HomeScreenActivity.this,
-							GroupListActivity.class);
-					i.putExtra("net.sf.briar.RESTRICTED", true);
-					i.putExtra("net.sf.briar.TITLE",
-							getResources().getString(R.string.blogs_title));
-					startActivity(i);
-				}
-			});
-			buttons.add(blogsButton);
-
-			Button syncButton = new Button(this);
-			syncButton.setLayoutParams(matchParent);
-			syncButton.setBackgroundResource(0);
-			syncButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.navigation_refresh, 0, 0);
-			syncButton.setText(R.string.synchronize_button);
-			syncButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					// FIXME: Hook this button up to an activity
-				}
-			});
-			buttons.add(syncButton);
-
-			Button quitButton = new Button(this);
-			quitButton.setLayoutParams(matchParent);
-			quitButton.setBackgroundResource(0);
-			quitButton.setCompoundDrawablesWithIntrinsicBounds(0,
-					R.drawable.device_access_accounts, 0, 0);
-			quitButton.setText(R.string.quit_button);
-			quitButton.setOnClickListener(new OnClickListener() {
-				public void onClick(View view) {
-					quit();
-				}
-			});
-			buttons.add(quitButton);
-
-			GridView grid = new GridView(this);
-			grid.setLayoutParams(matchParent);
-			grid.setGravity(CENTER);
-			grid.setPadding(5, 5, 5, 5);
-			grid.setBackgroundColor(getResources().getColor(
-					R.color.home_screen_background));
-			grid.setNumColumns(2);
-			grid.setAdapter(new BaseAdapter() {
-
-				public int getCount() {
-					return buttons.size();
-				}
-
-				public Object getItem(int position) {
-					return buttons.get(position);
-				}
-
-				public long getItemId(int position) {
-					return 0;
-				}
-
-				public View getView(int position, View convertView,
-						ViewGroup parent) {
-					return buttons.get(position);
-				}
-			});
-			setContentView(grid);
+			// The activity was launched from the splash screen
+			showButtons();
 		}
-
 		// Start the service and bind to it
 		startService(new Intent(BriarService.class.getName()));
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
 
-	@Override
-	public void onDestroy() {
-		super.onDestroy();
-		unbindService(serviceConnection);
+	private void showSpinner() {
+		LinearLayout layout = new LinearLayout(this);
+		layout.setLayoutParams(MATCH_MATCH);
+		layout.setGravity(CENTER);
+		ProgressBar progress = new ProgressBar(this);
+		progress.setIndeterminate(true);
+		layout.addView(progress);
+		setContentView(layout);
 	}
 
 	private void quit() {
-		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
-		layout.setGravity(CENTER);
-		ProgressBar spinner = new ProgressBar(this);
-		spinner.setIndeterminate(true);
-		layout.addView(spinner);
-		setContentView(layout);
 		new Thread() {
 			@Override
 			public void run() {
@@ -204,19 +99,172 @@ public class HomeScreenActivity extends BriarActivity {
 					if(LOG.isLoggable(INFO)) LOG.info("Shutting down service");
 					service.shutdown();
 					service.waitForShutdown();
-					// Finish the activity and kill the JVM
-					runOnUiThread(new Runnable() {
-						public void run() {
-							finish();
-							if(LOG.isLoggable(INFO)) LOG.info("Exiting");
-							System.exit(0);
-						}
-					});
 				} catch(InterruptedException e) {
 					if(LOG.isLoggable(INFO))
 						LOG.info("Interrupted while waiting for service");
 				}
+				// Finish the activity and kill the JVM
+				runOnUiThread(new Runnable() {
+					public void run() {
+						finish();
+						if(LOG.isLoggable(INFO)) LOG.info("Exiting");
+						System.exit(0);
+					}
+				});
 			}
 		}.start();
 	}
+
+	private void storeLocalAuthor(final LocalAuthor a) {
+		dbUiExecutor.execute(new Runnable() {
+			public void run() {
+				try {
+					serviceConnection.waitForStartup();
+					db.addLocalAuthor(a);
+					runOnUiThread(new Runnable() {
+						public void run() {
+							showButtons();
+						}
+					});
+				} catch(DbException e) {
+					if(LOG.isLoggable(WARNING))
+						LOG.log(WARNING, e.toString(), e);
+				} catch(InterruptedException e) {
+					if(LOG.isLoggable(INFO))
+						LOG.info("Interrupted while waiting for service");
+					Thread.currentThread().interrupt();
+				}
+			}
+		});
+	}
+
+	private void showButtons() {
+		ListView.LayoutParams matchMatch =
+				new ListView.LayoutParams(MATCH_PARENT, MATCH_PARENT);
+		final List<Button> buttons = new ArrayList<Button>();
+
+		Button contactsButton = new Button(this);
+		contactsButton.setLayoutParams(matchMatch);
+		contactsButton.setBackgroundResource(0);
+		contactsButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.social_person, 0, 0);
+		contactsButton.setText(R.string.contact_list_button);
+		contactsButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				startActivity(new Intent(HomeScreenActivity.this,
+						ContactListActivity.class));
+			}
+		});
+		buttons.add(contactsButton);
+
+		Button messagesButton = new Button(this);
+		messagesButton.setLayoutParams(matchMatch);
+		messagesButton.setBackgroundResource(0);
+		messagesButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.content_email, 0, 0);
+		messagesButton.setText(R.string.messages_button);
+		messagesButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				startActivity(new Intent(HomeScreenActivity.this,
+						ConversationListActivity.class));
+			}
+		});
+		buttons.add(messagesButton);
+
+		Button groupsButton = new Button(this);
+		groupsButton.setLayoutParams(matchMatch);
+		groupsButton.setBackgroundResource(0);
+		groupsButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.social_chat, 0, 0);
+		groupsButton.setText(R.string.groups_button);
+		groupsButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				Intent i = new Intent(HomeScreenActivity.this,
+						GroupListActivity.class);
+				i.putExtra("net.sf.briar.RESTRICTED", false);
+				i.putExtra("net.sf.briar.TITLE",
+						getResources().getString(R.string.groups_title));
+				startActivity(i);
+			}
+		});
+		buttons.add(groupsButton);
+
+		Button blogsButton = new Button(this);
+		blogsButton.setLayoutParams(matchMatch);
+		blogsButton.setBackgroundResource(0);
+		blogsButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.social_blog, 0, 0);
+		blogsButton.setText(R.string.blogs_button);
+		blogsButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				Intent i = new Intent(HomeScreenActivity.this,
+						GroupListActivity.class);
+				i.putExtra("net.sf.briar.RESTRICTED", true);
+				i.putExtra("net.sf.briar.TITLE",
+						getResources().getString(R.string.blogs_title));
+				startActivity(i);
+			}
+		});
+		buttons.add(blogsButton);
+
+		Button syncButton = new Button(this);
+		syncButton.setLayoutParams(matchMatch);
+		syncButton.setBackgroundResource(0);
+		syncButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.navigation_refresh, 0, 0);
+		syncButton.setText(R.string.synchronize_button);
+		syncButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				// FIXME: Hook this button up to an activity
+			}
+		});
+		buttons.add(syncButton);
+
+		Button quitButton = new Button(this);
+		quitButton.setLayoutParams(matchMatch);
+		quitButton.setBackgroundResource(0);
+		quitButton.setCompoundDrawablesWithIntrinsicBounds(0,
+				R.drawable.device_access_accounts, 0, 0);
+		quitButton.setText(R.string.quit_button);
+		quitButton.setOnClickListener(new OnClickListener() {
+			public void onClick(View view) {
+				quit();
+			}
+		});
+		buttons.add(quitButton);
+
+		GridView grid = new GridView(this);
+		grid.setLayoutParams(matchMatch);
+		grid.setGravity(CENTER);
+		grid.setPadding(5, 5, 5, 5);
+		grid.setBackgroundColor(getResources().getColor(
+				R.color.home_screen_background));
+		grid.setNumColumns(2);
+		grid.setAdapter(new BaseAdapter() {
+
+			public int getCount() {
+				return buttons.size();
+			}
+
+			public Object getItem(int position) {
+				return buttons.get(position);
+			}
+
+			public long getItemId(int position) {
+				return 0;
+			}
+
+			public View getView(int position, View convertView,
+					ViewGroup parent) {
+				return buttons.get(position);
+			}
+		});
+		setContentView(grid);
+	}
+
+	@Override
+	public void onDestroy() {
+		super.onDestroy();
+		unbindService(serviceConnection);
+	}
 }

briar-android/src/net/sf/briar/android/LocalAuthorSpinnerAdapter.java

@@ -1,36 +1,76 @@
 package net.sf.briar.android;
 
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
 
+import net.sf.briar.R;
+import net.sf.briar.api.Author;
 import net.sf.briar.api.LocalAuthor;
 import android.content.Context;
+import android.content.res.Resources;
+import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
+import android.widget.BaseAdapter;
 import android.widget.SpinnerAdapter;
 import android.widget.TextView;
 
-public class LocalAuthorSpinnerAdapter extends ArrayAdapter<LocalAuthor>
+public class LocalAuthorSpinnerAdapter extends BaseAdapter
 implements SpinnerAdapter {
 
-	public LocalAuthorSpinnerAdapter(Context context) {
-		super(context, android.R.layout.simple_spinner_item,
-				new ArrayList<LocalAuthor>());
+	private final Context ctx;
+	private final List<LocalAuthor> list = new ArrayList<LocalAuthor>();
+
+	public LocalAuthorSpinnerAdapter(Context ctx) {
+		this.ctx = ctx;
+	}
+
+	public void add(LocalAuthor a) {
+		list.add(a);
+		notifyDataSetChanged();
+	}
+
+	public void clear() {
+		list.clear();
+		notifyDataSetChanged();
+	}
+
+	public int getCount() {
+		return list.size() + 1;
+	}
+
+	public LocalAuthor getItem(int position) {
+		if(position == list.size()) return null;
+		return list.get(position);
+	}
+
+	public long getItemId(int position) {
+		return android.R.layout.simple_spinner_item;
+	}
+
+	public void sort(Comparator<Author> comparator) {
+		Collections.sort(list, comparator);
 	}
 
-	@Override
 	public View getView(int position, View convertView, ViewGroup parent) {
-		TextView name = new TextView(getContext());
+		Log.i("Briar", "getView: " + position);
+		TextView name = new TextView(ctx);
 		name.setTextSize(18);
 		name.setMaxLines(1);
-		name.setPadding(10, 10, 10, 10);
-		name.setText(getItem(position).getName());
+		Resources res = ctx.getResources();
+		int pad = res.getInteger(R.integer.spinner_padding);
+		name.setPadding(pad, pad, pad, pad);
+		if(position == list.size()) name.setText(R.string.create_identity_item);
+		else name.setText(list.get(position).getName());
 		return name;
 	}
 
 	@Override
 	public View getDropDownView(int position, View convertView,
 			ViewGroup parent) {
+		Log.i("Briar", "getDropDownView: " + position);
 		return getView(position, convertView, parent);
 	}
 }

briar-android/src/net/sf/briar/android/SetupActivity.java

@@ -0,0 +1,138 @@
+package net.sf.briar.android;
+
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
+import static android.view.Gravity.CENTER;
+import static android.view.Gravity.CENTER_HORIZONTAL;
+import static android.view.View.GONE;
+import static android.view.View.VISIBLE;
+import static android.view.inputmethod.InputMethodManager.HIDE_IMPLICIT_ONLY;
+import static android.widget.LinearLayout.VERTICAL;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.util.concurrent.Executor;
+
+import net.sf.briar.R;
+import net.sf.briar.api.AuthorFactory;
+import net.sf.briar.api.LocalAuthor;
+import net.sf.briar.api.android.ReferenceManager;
+import net.sf.briar.api.crypto.CryptoComponent;
+import net.sf.briar.api.crypto.CryptoExecutor;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import com.google.inject.Inject;
+
+public class SetupActivity extends BriarActivity
+implements OnEditorActionListener, OnClickListener {
+
+	@Inject @CryptoExecutor private Executor cryptoExecutor;
+	private EditText nicknameEntry = null;
+	private Button createButton = null;
+	private ProgressBar progress = null;
+
+	// Fields that are accessed from background threads must be volatile
+	@Inject private volatile CryptoComponent crypto;
+	@Inject private volatile AuthorFactory authorFactory;
+	@Inject private volatile ReferenceManager referenceManager;
+
+	@Override
+	public void onCreate(Bundle state) {
+		super.onCreate(null);
+		LinearLayout layout = new LinearLayout(this);
+		layout.setLayoutParams(MATCH_MATCH);
+		layout.setOrientation(VERTICAL);
+		layout.setGravity(CENTER_HORIZONTAL);
+
+		TextView chooseNickname = new TextView(this);
+		chooseNickname.setGravity(CENTER);
+		chooseNickname.setTextSize(18);
+		chooseNickname.setPadding(10, 10, 10, 10);
+		chooseNickname.setText(R.string.choose_nickname);
+		layout.addView(chooseNickname);
+
+		nicknameEntry = new EditText(this);
+		nicknameEntry.setTextSize(18);
+		nicknameEntry.setMaxLines(1);
+		nicknameEntry.setPadding(10, 10, 10, 10);
+		nicknameEntry.setOnEditorActionListener(this);
+		layout.addView(nicknameEntry);
+
+		createButton = new Button(this);
+		createButton.setLayoutParams(WRAP_WRAP);
+		createButton.setText(R.string.create_button);
+		createButton.setOnClickListener(this);
+		layout.addView(createButton);
+
+		progress = new ProgressBar(this);
+		progress.setLayoutParams(WRAP_WRAP);
+		progress.setIndeterminate(true);
+		progress.setVisibility(GONE);
+		layout.addView(progress);
+
+		setContentView(layout);
+	}
+
+	public boolean onEditorAction(TextView textView, int actionId, KeyEvent e) {
+		validateNickname();
+		return true;
+	}
+
+	public void onClick(View view) {
+		if(!validateNickname()) return;
+		final String nickname = nicknameEntry.getText().toString();
+		// Replace the button with a progress bar
+		createButton.setVisibility(GONE);
+		progress.setVisibility(VISIBLE);
+		// Create the identity in a background thread
+		cryptoExecutor.execute(new Runnable() {
+			public void run() {
+				KeyPair keyPair = crypto.generateSignatureKeyPair();
+				final byte[] publicKey = keyPair.getPublic().getEncoded();
+				final byte[] privateKey = keyPair.getPrivate().getEncoded();
+				LocalAuthor a;
+				try {
+					a = authorFactory.createLocalAuthor(nickname, publicKey,
+							privateKey);
+				} catch(IOException e) {
+					throw new RuntimeException(e);
+				}
+				showHomeScreen(referenceManager.putReference(a,
+						LocalAuthor.class));				
+			}
+		});
+	}
+
+	private void showHomeScreen(final long handle) {
+		runOnUiThread(new Runnable() {
+			public void run() {
+				Intent i = new Intent(SetupActivity.this,
+						HomeScreenActivity.class);
+				i.putExtra("net.sf.briar.LOCAL_AUTHOR_HANDLE", handle);
+				i.setFlags(FLAG_ACTIVITY_NEW_TASK);
+				startActivity(i);
+				finish();
+			}
+		});
+	}
+
+	private boolean validateNickname() {
+		if(nicknameEntry.getText().toString().equals("")) return false;
+		// Hide the soft keyboard
+		Object o = getSystemService(INPUT_METHOD_SERVICE);
+		((InputMethodManager) o).toggleSoftInput(HIDE_IMPLICIT_ONLY, 0);
+		return true;
+	}
+}

briar-android/src/net/sf/briar/android/SplashScreenActivity.java

@@ -1,15 +1,18 @@
 package net.sf.briar.android;
 
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
-import static android.content.Intent.FLAG_ACTIVITY_TASK_ON_HOME;
 import static android.view.Gravity.CENTER;
 import net.sf.briar.android.widgets.CommonLayoutParams;
+import net.sf.briar.api.db.DatabaseConfig;
+import roboguice.RoboGuice;
 import roboguice.activity.RoboSplashActivity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
 
+import com.google.inject.Injector;
+
 public class SplashScreenActivity extends RoboSplashActivity {
 
 	public SplashScreenActivity() {
@@ -30,8 +33,15 @@ public class SplashScreenActivity extends RoboSplashActivity {
 	}
 
 	protected void startNextActivity() {
-		Intent i = new Intent(this, HomeScreenActivity.class);
-		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_TASK_ON_HOME);
-		startActivity(i);
+		Injector guice = RoboGuice.getBaseApplicationInjector(getApplication());
+		if(guice.getInstance(DatabaseConfig.class).databaseExists()) {
+			Intent i = new Intent(this, HomeScreenActivity.class);
+			i.setFlags(FLAG_ACTIVITY_NEW_TASK);
+			startActivity(i);
+		} else {
+			Intent i = new Intent(this, SetupActivity.class);
+			i.setFlags(FLAG_ACTIVITY_NEW_TASK);
+			startActivity(i);
+		}
 	}
 }

briar-android/src/net/sf/briar/android/contact/ContactListActivity.java

@@ -1,9 +1,14 @@
 package net.sf.briar.android.contact;
 
+import static android.view.Gravity.CENTER;
 import static android.view.Gravity.CENTER_HORIZONTAL;
+import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
 
 import java.util.Collection;
 import java.util.Comparator;
@@ -15,8 +20,8 @@ import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
 import net.sf.briar.android.invitation.AddContactActivity;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
+import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.Contact;
 import net.sf.briar.api.ContactId;
 import net.sf.briar.api.android.DatabaseUiExecutor;
@@ -50,7 +55,7 @@ implements OnClickListener, DatabaseListener, ConnectionListener {
 	@Inject private ConnectionRegistry connectionRegistry;
 	private ContactListAdapter adapter = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 
@@ -58,33 +63,37 @@ implements OnClickListener, DatabaseListener, ConnectionListener {
 	public void onCreate(Bundle state) {
 		super.onCreate(null);
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		layout.setLayoutParams(MATCH_MATCH);
 		layout.setOrientation(VERTICAL);
 		layout.setGravity(CENTER_HORIZONTAL);
 
 		adapter = new ContactListAdapter(this);
 		ListView list = new ListView(this);
 		// Give me all the width and all the unused height
-		list.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		list.setLayoutParams(MATCH_WRAP_1);
 		list.setAdapter(adapter);
 		list.setOnItemClickListener(adapter);
 		layout.addView(list);
 
 		layout.addView(new HorizontalBorder(this));
 
+		LinearLayout footer = new LinearLayout(this);
+		footer.setLayoutParams(MATCH_WRAP);
+		footer.setOrientation(HORIZONTAL);
+		footer.setGravity(CENTER);
+		footer.addView(new HorizontalSpace(this));
+
 		ImageButton addContactButton = new ImageButton(this);
 		addContactButton.setBackgroundResource(0);
 		addContactButton.setImageResource(R.drawable.social_add_person);
 		addContactButton.setOnClickListener(this);
-		layout.addView(addContactButton);
+		footer.addView(addContactButton);
+		footer.addView(new HorizontalSpace(this));
+		layout.addView(footer);
 
 		setContentView(layout);
 
-		// Listen for contacts being added or removed
-		db.addListener(this);
-		// Listen for contacts connecting or disconnecting
-		connectionRegistry.addListener(this);
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
@@ -92,6 +101,8 @@ implements OnClickListener, DatabaseListener, ConnectionListener {
 	@Override
 	public void onResume() {
 		super.onResume();
+		db.addListener(this);
+		connectionRegistry.addListener(this);
 		loadContacts();
 	}
 
@@ -133,10 +144,15 @@ implements OnClickListener, DatabaseListener, ConnectionListener {
 	}
 
 	@Override
-	public void onDestroy() {
-		super.onDestroy();
+	public void onPause() {
+		super.onPause();
 		db.removeListener(this);
 		connectionRegistry.removeListener(this);
+	}
+
+	@Override
+	public void onDestroy() {
+		super.onDestroy();
 		unbindService(serviceConnection);
 	}
 
@@ -145,7 +161,6 @@ implements OnClickListener, DatabaseListener, ConnectionListener {
 	}
 
 	public void eventOccurred(DatabaseEvent e) {
-		// These events should be rare, so just reload the list
 		if(e instanceof ContactAddedEvent) loadContacts();
 		else if(e instanceof ContactRemovedEvent) loadContacts();
 	}

briar-android/src/net/sf/briar/android/contact/ContactListAdapter.java

@@ -2,11 +2,11 @@ package net.sf.briar.android.contact;
 
 import static android.view.Gravity.CENTER_VERTICAL;
 import static android.widget.LinearLayout.HORIZONTAL;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 
 import java.util.ArrayList;
 
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.text.Html;
 import android.text.format.DateUtils;
@@ -44,7 +44,7 @@ implements OnItemClickListener {
 
 		TextView name = new TextView(ctx);
 		// Give me all the unused width
-		name.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		name.setLayoutParams(WRAP_WRAP_1);
 		name.setTextSize(18);
 		name.setMaxLines(1);
 		name.setPadding(0, 10, 10, 10);

briar-android/src/net/sf/briar/android/groups/GroupActivity.java

@@ -4,6 +4,8 @@ import static android.view.Gravity.CENTER_HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
 
 import java.util.Collection;
 import java.util.concurrent.Executor;
@@ -14,7 +16,6 @@ import net.sf.briar.android.AscendingHeaderComparator;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
 import net.sf.briar.api.Author;
 import net.sf.briar.api.android.DatabaseUiExecutor;
@@ -55,7 +56,7 @@ OnClickListener, OnItemClickListener {
 	private GroupAdapter adapter = null;
 	private ListView list = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	private volatile GroupId groupId = null;
@@ -66,22 +67,22 @@ OnClickListener, OnItemClickListener {
 
 		Intent i = getIntent();
 		restricted = i.getBooleanExtra("net.sf.briar.RESTRICTED", false);
-		byte[] id = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
-		if(id == null) throw new IllegalStateException();
-		groupId = new GroupId(id);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
+		if(b == null) throw new IllegalStateException();
+		groupId = new GroupId(b);
 		groupName = i.getStringExtra("net.sf.briar.GROUP_NAME");
 		if(groupName == null) throw new IllegalStateException();
 		setTitle(groupName);
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		layout.setLayoutParams(MATCH_MATCH);
 		layout.setOrientation(VERTICAL);
 		layout.setGravity(CENTER_HORIZONTAL);
 
 		adapter = new GroupAdapter(this);
 		list = new ListView(this);
 		// Give me all the width and all the unused height
-		list.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		list.setLayoutParams(MATCH_WRAP_1);
 		list.setAdapter(adapter);
 		list.setOnItemClickListener(this);
 		layout.addView(list);
@@ -96,7 +97,7 @@ OnClickListener, OnItemClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
@@ -234,8 +235,6 @@ OnClickListener, OnItemClickListener {
 		}
 		i.putExtra("net.sf.briar.CONTENT_TYPE", item.getContentType());
 		i.putExtra("net.sf.briar.TIMESTAMP", item.getTimestamp());
-		i.putExtra("net.sf.briar.FIRST", position == 0);
-		i.putExtra("net.sf.briar.LAST", position == adapter.getCount() - 1);
 		startActivityForResult(i, position);
 	}
 }

briar-android/src/net/sf/briar/android/groups/GroupAdapter.java

@@ -6,13 +6,13 @@ import static android.view.View.INVISIBLE;
 import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 import static net.sf.briar.api.messaging.Rating.GOOD;
 import static net.sf.briar.api.messaging.Rating.UNRATED;
 
 import java.util.ArrayList;
 
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.Author;
 import net.sf.briar.api.db.GroupMessageHeader;
@@ -39,6 +39,7 @@ class GroupAdapter extends ArrayAdapter<GroupMessageHeader> {
 	public View getView(int position, View convertView, ViewGroup parent) {
 		GroupMessageHeader item = getItem(position);
 		Context ctx = getContext();
+
 		// FIXME: Use a RelativeLayout
 		LinearLayout layout = new LinearLayout(ctx);
 		layout.setOrientation(HORIZONTAL);
@@ -49,7 +50,7 @@ class GroupAdapter extends ArrayAdapter<GroupMessageHeader> {
 
 		LinearLayout innerLayout = new LinearLayout(ctx);
 		// Give me all the unused width
-		innerLayout.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		innerLayout.setLayoutParams(WRAP_WRAP_1);
 		innerLayout.setOrientation(VERTICAL);
 
 		LinearLayout authorLayout = new LinearLayout(ctx);
@@ -66,7 +67,7 @@ class GroupAdapter extends ArrayAdapter<GroupMessageHeader> {
 
 		TextView name = new TextView(ctx);
 		// Give me all the unused width
-		name.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		name.setLayoutParams(WRAP_WRAP_1);
 		name.setTextSize(18);
 		name.setMaxLines(1);
 		name.setPadding(0, 10, 10, 10);

briar-android/src/net/sf/briar/android/groups/GroupListActivity.java

@@ -6,6 +6,9 @@ import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -18,7 +21,6 @@ import net.sf.briar.R;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.android.DatabaseUiExecutor;
@@ -56,7 +58,7 @@ implements OnClickListener, DatabaseListener {
 	private ListView list = null;
 	private ImageButton newGroupButton = null, composeButton = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	private volatile boolean restricted = false;
@@ -65,7 +67,7 @@ implements OnClickListener, DatabaseListener {
 	public void onCreate(Bundle state) {
 		super.onCreate(null);
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		layout.setLayoutParams(MATCH_MATCH);
 		layout.setOrientation(VERTICAL);
 		layout.setGravity(CENTER_HORIZONTAL);
 
@@ -78,7 +80,7 @@ implements OnClickListener, DatabaseListener {
 		adapter = new GroupListAdapter(this);
 		list = new ListView(this);
 		// Give me all the width and all the unused height
-		list.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		list.setLayoutParams(MATCH_WRAP_1);
 		list.setAdapter(adapter);
 		list.setOnItemClickListener(adapter);
 		layout.addView(list);
@@ -86,7 +88,7 @@ implements OnClickListener, DatabaseListener {
 		layout.addView(new HorizontalBorder(this));
 
 		LinearLayout footer = new LinearLayout(this);
-		footer.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		footer.setLayoutParams(MATCH_WRAP);
 		footer.setOrientation(HORIZONTAL);
 		footer.setGravity(CENTER);
 		footer.addView(new HorizontalSpace(this));
@@ -110,7 +112,7 @@ implements OnClickListener, DatabaseListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}

briar-android/src/net/sf/briar/android/groups/GroupListAdapter.java

@@ -4,11 +4,11 @@ import static android.graphics.Typeface.BOLD;
 import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 
 import java.util.ArrayList;
 
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.util.StringUtils;
 import android.content.Context;
@@ -45,7 +45,7 @@ implements OnItemClickListener {
 
 		LinearLayout innerLayout = new LinearLayout(ctx);
 		// Give me all the unused width
-		innerLayout.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		innerLayout.setLayoutParams(WRAP_WRAP_1);
 		innerLayout.setOrientation(VERTICAL);
 
 		TextView name = new TextView(ctx);

briar-android/src/net/sf/briar/android/groups/ReadGroupMessageActivity.java

@@ -9,6 +9,9 @@ import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 import static net.sf.briar.api.messaging.Rating.BAD;
 import static net.sf.briar.api.messaging.Rating.GOOD;
 import static net.sf.briar.api.messaging.Rating.UNRATED;
@@ -21,7 +24,6 @@ import net.sf.briar.R;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.AuthorId;
@@ -70,7 +72,7 @@ implements OnClickListener {
 	private ImageButton replyButton = null;
 	private TextView content = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	private volatile MessageId messageId = null;
@@ -81,19 +83,19 @@ implements OnClickListener {
 		super.onCreate(null);
 
 		Intent i = getIntent();
-		byte[] id = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
-		if(id == null) throw new IllegalStateException();
-		groupId = new GroupId(id);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
+		if(b == null) throw new IllegalStateException();
+		groupId = new GroupId(b);
 		String groupName = i.getStringExtra("net.sf.briar.GROUP_NAME");
 		if(groupName == null) throw new IllegalStateException();
 		setTitle(groupName);
-		id = i.getByteArrayExtra("net.sf.briar.MESSAGE_ID");
-		if(id == null) throw new IllegalStateException();
-		messageId = new MessageId(id);
+		b = i.getByteArrayExtra("net.sf.briar.MESSAGE_ID");
+		if(b == null) throw new IllegalStateException();
+		messageId = new MessageId(b);
 		String authorName = null;
-		id = i.getByteArrayExtra("net.sf.briar.AUTHOR_ID");
-		if(id != null) {
-			authorId = new AuthorId(id);
+		b = i.getByteArrayExtra("net.sf.briar.AUTHOR_ID");
+		if(b != null) {
+			authorId = new AuthorId(b);
 			authorName = i.getStringExtra("net.sf.briar.AUTHOR_NAME");
 			if(authorName == null) throw new IllegalStateException();
 			String r = i.getStringExtra("net.sf.briar.RATING");
@@ -103,8 +105,6 @@ implements OnClickListener {
 		if(contentType == null) throw new IllegalStateException();
 		long timestamp = i.getLongExtra("net.sf.briar.TIMESTAMP", -1);
 		if(timestamp == -1) throw new IllegalStateException();
-		boolean first = i.getBooleanExtra("net.sf.briar.FIRST", false);
-		boolean last = i.getBooleanExtra("net.sf.briar.LAST", false);
 
 		if(state != null && bundleEncrypter.decrypt(state)) {
 			read = state.getBoolean("net.sf.briar.READ");
@@ -114,12 +114,12 @@ implements OnClickListener {
 		}
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		layout.setLayoutParams(MATCH_WRAP);
 		layout.setOrientation(VERTICAL);
 
 		ScrollView scrollView = new ScrollView(this);
 		// Give me all the width and all the unused height
-		scrollView.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		scrollView.setLayoutParams(MATCH_WRAP_1);
 
 		LinearLayout message = new LinearLayout(this);
 		message.setOrientation(VERTICAL);
@@ -127,7 +127,7 @@ implements OnClickListener {
 		message.setBackgroundColor(res.getColor(R.color.content_background));
 
 		LinearLayout header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
@@ -140,7 +140,7 @@ implements OnClickListener {
 
 		TextView author = new TextView(this);
 		// Give me all the unused width
-		author.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		author.setLayoutParams(WRAP_WRAP_1);
 		author.setTextSize(18);
 		author.setMaxLines(1);
 		author.setPadding(10, 10, 10, 10);
@@ -174,7 +174,7 @@ implements OnClickListener {
 		layout.addView(new HorizontalBorder(this));
 
 		LinearLayout footer = new LinearLayout(this);
-		footer.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		footer.setLayoutParams(MATCH_WRAP);
 		footer.setOrientation(HORIZONTAL);
 		footer.setGravity(CENTER);
 
@@ -207,7 +207,6 @@ implements OnClickListener {
 		prevButton.setBackgroundResource(0);
 		prevButton.setImageResource(R.drawable.navigation_previous_item);
 		prevButton.setOnClickListener(this);
-		prevButton.setEnabled(!first);
 		footer.addView(prevButton);
 		footer.addView(new HorizontalSpace(this));
 
@@ -215,7 +214,6 @@ implements OnClickListener {
 		nextButton.setBackgroundResource(0);
 		nextButton.setImageResource(R.drawable.navigation_next_item);
 		nextButton.setOnClickListener(this);
-		nextButton.setEnabled(!last);
 		footer.addView(nextButton);
 		footer.addView(new HorizontalSpace(this));
 
@@ -228,7 +226,7 @@ implements OnClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}

briar-android/src/net/sf/briar/android/groups/WriteGroupMessageActivity.java

@@ -5,6 +5,7 @@ import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
 
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
@@ -22,7 +23,6 @@ import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
 import net.sf.briar.android.LocalAuthorSpinnerAdapter;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.LocalAuthor;
 import net.sf.briar.api.android.BundleEncrypter;
@@ -65,7 +65,7 @@ implements OnItemSelectedListener, OnClickListener {
 	private ImageButton sendButton = null;
 	private EditText content = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	@Inject private volatile MessageFactory messageFactory;
@@ -81,17 +81,17 @@ implements OnItemSelectedListener, OnClickListener {
 
 		Intent i = getIntent();
 		restricted = i.getBooleanExtra("net.sf.briar.RESTRICTED", false);
-		byte[] id = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
-		if(id != null) groupId = new GroupId(id);
-		id = i.getByteArrayExtra("net.sf.briar.PARENT_ID");
-		if(id != null) parentId = new MessageId(id);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.GROUP_ID");
+		if(b != null) groupId = new GroupId(b);
+		b = i.getByteArrayExtra("net.sf.briar.PARENT_ID");
+		if(b != null) parentId = new MessageId(b);
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		layout.setLayoutParams(MATCH_WRAP);
 		layout.setOrientation(VERTICAL);
 
 		LinearLayout header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
@@ -103,8 +103,8 @@ implements OnItemSelectedListener, OnClickListener {
 
 		fromAdapter = new LocalAuthorSpinnerAdapter(this);
 		fromSpinner = new Spinner(this);
+		fromSpinner.setAdapter(fromAdapter);
 		fromSpinner.setOnItemSelectedListener(this);
-		loadLocalAuthorList();
 		header.addView(fromSpinner);
 
 		header.addView(new HorizontalSpace(this));
@@ -118,7 +118,7 @@ implements OnItemSelectedListener, OnClickListener {
 		layout.addView(header);
 
 		header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
@@ -132,7 +132,6 @@ implements OnItemSelectedListener, OnClickListener {
 		toSpinner = new Spinner(this);
 		toSpinner.setAdapter(toAdapter);
 		toSpinner.setOnItemSelectedListener(this);
-		loadGroupList();
 		header.addView(toSpinner);
 		layout.addView(header);
 
@@ -146,17 +145,24 @@ implements OnItemSelectedListener, OnClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
 
-	private void loadLocalAuthorList() {
+	@Override
+	public void onResume() {
+		super.onResume();
+		loadLocalAuthors();
+		loadGroups();
+	}
+
+	private void loadLocalAuthors() {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
 				try {
 					serviceConnection.waitForStartup();
-					displayLocalAuthorList(db.getLocalAuthors());
+					displayLocalAuthors(db.getLocalAuthors());
 				} catch(DbException e) {
 					if(LOG.isLoggable(WARNING))
 						LOG.log(WARNING, e.toString(), e);
@@ -168,7 +174,7 @@ implements OnItemSelectedListener, OnClickListener {
 		});
 	}
 
-	private void displayLocalAuthorList(
+	private void displayLocalAuthors(
 			final Collection<LocalAuthor> localAuthors) {
 		runOnUiThread(new Runnable() {
 			public void run() {
@@ -179,7 +185,7 @@ implements OnItemSelectedListener, OnClickListener {
 		});
 	}
 
-	private void loadGroupList() {
+	private void loadGroups() {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
 				try {
@@ -192,7 +198,7 @@ implements OnItemSelectedListener, OnClickListener {
 							if(!g.isRestricted()) groups.add(g);
 					}
 					groups = Collections.unmodifiableList(groups);
-					displayGroupList(groups);
+					displayGroups(groups);
 				} catch(DbException e) {
 					if(LOG.isLoggable(WARNING))
 						LOG.log(WARNING, e.toString(), e);
@@ -204,7 +210,7 @@ implements OnItemSelectedListener, OnClickListener {
 		});
 	}
 
-	private void displayGroupList(final Collection<Group> groups) {
+	private void displayGroups(final Collection<Group> groups) {
 		runOnUiThread(new Runnable() {
 			public void run() {
 				int index = -1;
@@ -257,8 +263,8 @@ implements OnItemSelectedListener, OnClickListener {
 	public void onClick(View view) {
 		if(group == null) throw new IllegalStateException();
 		try {
-			storeMessage(localAuthor, group,
-					content.getText().toString().getBytes("UTF-8"));
+			byte[] b = content.getText().toString().getBytes("UTF-8");
+			storeMessage(localAuthor, group, b);
 		} catch(UnsupportedEncodingException e) {
 			throw new RuntimeException(e);
 		}

briar-android/src/net/sf/briar/android/helloworld/HelloWorldModule.java

@@ -32,10 +32,15 @@ public class HelloWorldModule extends AbstractModule {
 
 	@Provides @Singleton
 	DatabaseConfig getDatabaseConfig(final Application app) {
+		final File dir = app.getApplicationContext().getDir("db", MODE_PRIVATE);
 		return new DatabaseConfig() {
 
-			public File getDataDirectory() {
-				return app.getApplicationContext().getDir("db", MODE_PRIVATE);
+			public boolean databaseExists() {
+				return dir.isDirectory() && dir.listFiles().length > 0;
+			}
+
+			public File getDatabaseDirectory() {
+				return dir;
 			}
 
 			public char[] getPassword() {

briar-android/src/net/sf/briar/android/identity/CreateIdentityActivity.java

@@ -0,0 +1,165 @@
+package net.sf.briar.android.identity;
+
+import static android.view.Gravity.CENTER;
+import static android.view.Gravity.CENTER_HORIZONTAL;
+import static android.view.View.GONE;
+import static android.view.View.VISIBLE;
+import static android.view.inputmethod.InputMethodManager.HIDE_IMPLICIT_ONLY;
+import static android.widget.LinearLayout.VERTICAL;
+import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import net.sf.briar.R;
+import net.sf.briar.android.BriarActivity;
+import net.sf.briar.android.BriarService;
+import net.sf.briar.android.BriarService.BriarServiceConnection;
+import net.sf.briar.api.AuthorFactory;
+import net.sf.briar.api.LocalAuthor;
+import net.sf.briar.api.android.DatabaseUiExecutor;
+import net.sf.briar.api.crypto.CryptoComponent;
+import net.sf.briar.api.crypto.CryptoExecutor;
+import net.sf.briar.api.db.DatabaseComponent;
+import net.sf.briar.api.db.DbException;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import com.google.inject.Inject;
+
+public class CreateIdentityActivity extends BriarActivity
+implements OnEditorActionListener, OnClickListener {
+
+	private static final Logger LOG =
+			Logger.getLogger(CreateIdentityActivity.class.getName());
+
+	private final BriarServiceConnection serviceConnection =
+			new BriarServiceConnection();
+
+	@Inject @CryptoExecutor private Executor cryptoExecutor;
+	private EditText nicknameEntry = null;
+	private Button createButton = null;
+	private ProgressBar progress = null;
+
+	// Fields that are accessed from background threads must be volatile
+	@Inject private volatile CryptoComponent crypto;
+	@Inject private volatile AuthorFactory authorFactory;
+	@Inject private volatile DatabaseComponent db;
+	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
+
+	@Override
+	public void onCreate(Bundle state) {
+		super.onCreate(null);
+		LinearLayout layout = new LinearLayout(this);
+		layout.setLayoutParams(MATCH_MATCH);
+		layout.setOrientation(VERTICAL);
+		layout.setGravity(CENTER_HORIZONTAL);
+
+		TextView chooseNickname = new TextView(this);
+		chooseNickname.setGravity(CENTER);
+		chooseNickname.setTextSize(18);
+		chooseNickname.setPadding(10, 10, 10, 10);
+		chooseNickname.setText(R.string.choose_nickname);
+		layout.addView(chooseNickname);
+
+		nicknameEntry = new EditText(this);
+		nicknameEntry.setTextSize(18);
+		nicknameEntry.setMaxLines(1);
+		nicknameEntry.setPadding(10, 10, 10, 10);
+		nicknameEntry.setOnEditorActionListener(this);
+		layout.addView(nicknameEntry);
+
+		createButton = new Button(this);
+		createButton.setLayoutParams(WRAP_WRAP);
+		createButton.setText(R.string.create_button);
+		createButton.setOnClickListener(this);
+		layout.addView(createButton);
+
+		progress = new ProgressBar(this);
+		progress.setLayoutParams(WRAP_WRAP);
+		progress.setIndeterminate(true);
+		progress.setVisibility(GONE);
+		layout.addView(progress);
+
+		setContentView(layout);
+
+		// Bind to the service so we can wait for it to start
+		bindService(new Intent(BriarService.class.getName()),
+				serviceConnection, 0);
+	}
+
+	@Override
+	public void onDestroy() {
+		super.onDestroy();
+		unbindService(serviceConnection);
+	}
+
+	public boolean onEditorAction(TextView textView, int actionId, KeyEvent e) {
+		validateNickname();
+		return true;
+	}
+
+	public void onClick(View view) {
+		if(!validateNickname()) return;
+		final String nickname = nicknameEntry.getText().toString();
+		// Replace the button with a progress bar
+		createButton.setVisibility(GONE);
+		progress.setVisibility(VISIBLE);
+		// Create the identity in a background thread
+		cryptoExecutor.execute(new Runnable() {
+			public void run() {
+				KeyPair keyPair = crypto.generateSignatureKeyPair();
+				final byte[] publicKey = keyPair.getPublic().getEncoded();
+				final byte[] privateKey = keyPair.getPrivate().getEncoded();
+				LocalAuthor a;
+				try {
+					a = authorFactory.createLocalAuthor(nickname, publicKey,
+							privateKey);
+				} catch(IOException e) {
+					throw new RuntimeException(e);
+				}
+				storeLocalAuthor(a);
+			}
+		});
+	}
+
+	private void storeLocalAuthor(final LocalAuthor a) {
+		dbUiExecutor.execute(new Runnable() {
+			public void run() {
+				try {
+					db.addLocalAuthor(a);
+				} catch(DbException e) {
+					if(LOG.isLoggable(WARNING))
+						LOG.log(WARNING, e.toString(), e);
+				}
+				runOnUiThread(new Runnable() {
+					public void run() {
+						finish();
+					}
+				});
+			}
+		});
+	}
+
+	private boolean validateNickname() {
+		if(nicknameEntry.getText().toString().equals("")) return false;
+		// Hide the soft keyboard
+		Object o = getSystemService(INPUT_METHOD_SERVICE);
+		((InputMethodManager) o).toggleSoftInput(HIDE_IMPLICIT_ONLY, 0);
+		return true;
+	}
+}

briar-android/src/net/sf/briar/android/invitation/AddContactActivity.java

@@ -10,6 +10,7 @@ import net.sf.briar.android.AuthorNameComparator;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
+import net.sf.briar.android.LocalAuthorSpinnerAdapter;
 import net.sf.briar.api.AuthorId;
 import net.sf.briar.api.LocalAuthor;
 import net.sf.briar.api.android.BundleEncrypter;
@@ -24,7 +25,6 @@ import net.sf.briar.api.invitation.InvitationTask;
 import net.sf.briar.api.invitation.InvitationTaskFactory;
 import android.content.Intent;
 import android.os.Bundle;
-import android.widget.ArrayAdapter;
 
 import com.google.inject.Inject;
 
@@ -54,7 +54,7 @@ implements InvitationListener {
 	private boolean localMatched = false, remoteMatched = false;
 	private String contactName = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 
@@ -66,8 +66,8 @@ implements InvitationListener {
 			setView(new NetworkSetupView(this));
 		} else {
 			// Restore the activity's state
-			byte[] id = state.getByteArray("net.sf.briar.LOCAL_AUTHOR_ID");
-			if(id != null) localAuthorId = new AuthorId(id);
+			byte[] b = state.getByteArray("net.sf.briar.LOCAL_AUTHOR_ID");
+			if(b != null) localAuthorId = new AuthorId(b);
 			networkName = state.getString("net.sf.briar.NETWORK_NAME");
 			useBluetooth = state.getBoolean("net.sf.briar.USE_BLUETOOTH");
 			taskHandle = state.getLong("net.sf.briar.TASK_HANDLE", -1);
@@ -131,7 +131,7 @@ implements InvitationListener {
 			}
 		}
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
@@ -162,6 +162,7 @@ implements InvitationListener {
 	public void onDestroy() {
 		super.onDestroy();
 		if(task != null) task.removeListener(this);
+		unbindService(serviceConnection);
 	}
 
 	void setView(AddContactView view) {
@@ -171,9 +172,9 @@ implements InvitationListener {
 	}
 
 	void reset(AddContactView view) {
+		// Note: localAuthorId is not reset
 		task = null;
 		taskHandle = -1;
-		localAuthorId = null;
 		networkName = null;
 		useBluetooth = false;
 		localInvitationCode = -1;
@@ -185,12 +186,12 @@ implements InvitationListener {
 		setView(view);
 	}
 
-	void loadLocalAuthorList(final ArrayAdapter<LocalAuthor> adapter) {
+	void loadLocalAuthorList(final LocalAuthorSpinnerAdapter adapter) {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
 				try {
 					serviceConnection.waitForStartup();
-					updateLocalAuthorList(adapter, db.getLocalAuthors());
+					displayLocalAuthorList(adapter, db.getLocalAuthors());
 				} catch(DbException e) {
 					if(LOG.isLoggable(WARNING))
 						LOG.log(WARNING, e.toString(), e);
@@ -202,7 +203,7 @@ implements InvitationListener {
 		});
 	}
 
-	private void updateLocalAuthorList(final ArrayAdapter<LocalAuthor> adapter,
+	private void displayLocalAuthorList(final LocalAuthorSpinnerAdapter adapter,
 			final Collection<LocalAuthor> localAuthors) {
 		runOnUiThread(new Runnable() {
 			public void run() {

briar-android/src/net/sf/briar/android/invitation/AddContactView.java

@@ -1,7 +1,7 @@
 package net.sf.briar.android.invitation;
 
 import static android.view.Gravity.CENTER_HORIZONTAL;
-import net.sf.briar.android.widgets.CommonLayoutParams;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
 import android.content.Context;
 import android.widget.LinearLayout;
 
@@ -15,7 +15,7 @@ abstract class AddContactView extends LinearLayout {
 
 	void init(AddContactActivity container) {
 		this.container = container;
-		setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		setLayoutParams(MATCH_MATCH);
 		setOrientation(VERTICAL);
 		setGravity(CENTER_HORIZONTAL);
 		populate();

briar-android/src/net/sf/briar/android/invitation/BluetoothWidget.java

@@ -3,8 +3,8 @@ package net.sf.briar.android.invitation;
 import static android.bluetooth.BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE;
 import static android.provider.Settings.ACTION_BLUETOOTH_SETTINGS;
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.content.Intent;
@@ -34,7 +34,7 @@ public class BluetoothWidget extends LinearLayout implements OnClickListener {
 		removeAllViews();
 		Context ctx = getContext();
 		TextView status = new TextView(ctx);
-		status.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		status.setLayoutParams(WRAP_WRAP_1);
 		status.setTextSize(14);
 		status.setPadding(10, 10, 10, 10);
 		BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

briar-android/src/net/sf/briar/android/invitation/CodeEntryWidget.java

@@ -5,8 +5,8 @@ import static android.text.InputType.TYPE_CLASS_NUMBER;
 import static android.view.Gravity.CENTER;
 import static android.view.Gravity.CENTER_HORIZONTAL;
 import static android.view.inputmethod.InputMethodManager.HIDE_IMPLICIT_ONLY;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.view.KeyEvent;
 import android.view.View;
@@ -18,8 +18,8 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.TextView.OnEditorActionListener;
 
-public class CodeEntryWidget extends LinearLayout implements
-OnEditorActionListener, OnClickListener {
+public class CodeEntryWidget extends LinearLayout
+implements OnEditorActionListener, OnClickListener {
 
 	private CodeEntryListener listener = null;
 	private EditText codeEntry = null;
@@ -46,7 +46,7 @@ OnEditorActionListener, OnClickListener {
 		innerLayout.setGravity(CENTER);
 
 		final Button continueButton = new Button(ctx);
-		continueButton.setLayoutParams(CommonLayoutParams.WRAP_WRAP);
+		continueButton.setLayoutParams(WRAP_WRAP);
 		continueButton.setText(R.string.continue_button);
 		continueButton.setEnabled(false);
 		continueButton.setOnClickListener(this);

briar-android/src/net/sf/briar/android/invitation/CodesDoNotMatchView.java

@@ -1,8 +1,8 @@
 package net.sf.briar.android.invitation;
 
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -44,7 +44,7 @@ implements OnClickListener {
 		addView(interfering);
 
 		Button tryAgainButton = new Button(ctx);
-		tryAgainButton.setLayoutParams(CommonLayoutParams.WRAP_WRAP);
+		tryAgainButton.setLayoutParams(WRAP_WRAP);
 		tryAgainButton.setText(R.string.try_again_button);
 		tryAgainButton.setOnClickListener(this);
 		addView(tryAgainButton);

briar-android/src/net/sf/briar/android/invitation/ConnectionFailedView.java

@@ -1,8 +1,8 @@
 package net.sf.briar.android.invitation;
 
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -54,7 +54,7 @@ implements WifiStateListener, BluetoothStateListener, OnClickListener {
 		addView(bluetooth);
 
 		tryAgainButton = new Button(ctx);
-		tryAgainButton.setLayoutParams(CommonLayoutParams.WRAP_WRAP);
+		tryAgainButton.setLayoutParams(WRAP_WRAP);
 		tryAgainButton.setText(R.string.try_again_button);
 		tryAgainButton.setOnClickListener(this);
 		enabledOrDisableTryAgainButton();

briar-android/src/net/sf/briar/android/invitation/ContactAddedView.java

@@ -1,8 +1,8 @@
 package net.sf.briar.android.invitation;
 
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -38,15 +38,15 @@ implements OnClickListener {
 		addView(innerLayout);
 
 		TextView contactName = new TextView(ctx);
+		contactName.setGravity(CENTER);
 		contactName.setTextSize(22);
 		contactName.setPadding(10, 0, 10, 10);
 		contactName.setText(container.getContactName());
 		addView(contactName);
 
 		Button doneButton = new Button(ctx);
-		doneButton.setLayoutParams(CommonLayoutParams.WRAP_WRAP);
+		doneButton.setLayoutParams(WRAP_WRAP);
 		doneButton.setText(R.string.done_button);
-		doneButton.setEnabled(false);
 		doneButton.setOnClickListener(this);
 		addView(doneButton);
 	}

briar-android/src/net/sf/briar/android/invitation/NetworkSetupView.java

@@ -1,10 +1,14 @@
 package net.sf.briar.android.invitation;
 
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP;
 import net.sf.briar.R;
 import net.sf.briar.android.LocalAuthorSpinnerAdapter;
-import net.sf.briar.android.widgets.CommonLayoutParams;
+import net.sf.briar.android.identity.CreateIdentityActivity;
+import net.sf.briar.api.LocalAuthor;
 import android.content.Context;
+import android.content.Intent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
@@ -31,7 +35,7 @@ OnClickListener {
 		Context ctx = getContext();
 
 		LinearLayout innerLayout = new LinearLayout(ctx);
-		innerLayout.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		innerLayout.setLayoutParams(MATCH_WRAP);
 		innerLayout.setOrientation(HORIZONTAL);
 		innerLayout.setGravity(CENTER);
 
@@ -58,7 +62,7 @@ OnClickListener {
 		addView(bluetooth);
 
 		continueButton = new Button(ctx);
-		continueButton.setLayoutParams(CommonLayoutParams.WRAP_WRAP);
+		continueButton.setLayoutParams(WRAP_WRAP);
 		continueButton.setText(R.string.continue_button);
 		continueButton.setOnClickListener(this);
 		enableOrDisableContinueButton();
@@ -93,7 +97,13 @@ OnClickListener {
 
 	public void onItemSelected(AdapterView<?> parent, View view, int position,
 			long id) {
-		container.setLocalAuthorId(adapter.getItem(position).getId());		
+		LocalAuthor item = adapter.getItem(position);
+		if(item == null) {
+			Intent i = new Intent(container, CreateIdentityActivity.class);
+			container.startActivity(i);
+		} else {
+			container.setLocalAuthorId(item.getId());
+		}
 	}
 
 	public void onNothingSelected(AdapterView<?> parent) {

briar-android/src/net/sf/briar/android/invitation/WifiWidget.java

@@ -3,8 +3,8 @@ package net.sf.briar.android.invitation;
 import static android.content.Context.WIFI_SERVICE;
 import static android.provider.Settings.ACTION_WIFI_SETTINGS;
 import static android.view.Gravity.CENTER;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import android.content.Context;
 import android.content.Intent;
 import android.net.wifi.WifiInfo;
@@ -37,7 +37,7 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 		TextView status = new TextView(ctx);
 		status.setTextSize(14);
 		status.setPadding(10, 10, 10, 10);
-		status.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		status.setLayoutParams(WRAP_WRAP_1);
 		WifiManager wifi = (WifiManager) ctx.getSystemService(WIFI_SERVICE);
 		if(wifi == null) {
 			wifiStateChanged(null);

briar-android/src/net/sf/briar/android/messages/ConversationActivity.java

@@ -4,6 +4,8 @@ import static android.view.Gravity.CENTER_HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
 
 import java.util.Collection;
 import java.util.concurrent.Executor;
@@ -14,9 +16,10 @@ import net.sf.briar.android.AscendingHeaderComparator;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
+import net.sf.briar.api.AuthorId;
 import net.sf.briar.api.ContactId;
+import net.sf.briar.api.LocalAuthor;
 import net.sf.briar.api.android.DatabaseUiExecutor;
 import net.sf.briar.api.db.DatabaseComponent;
 import net.sf.briar.api.db.DbException;
@@ -52,10 +55,12 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 	private ConversationAdapter adapter = null;
 	private ListView list = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	private volatile ContactId contactId = null;
+	private volatile AuthorId localAuthorId = null;
+	private volatile String localAuthorName = null;
 
 	@Override
 	public void onCreate(Bundle state) {
@@ -68,16 +73,19 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 		contactName = i.getStringExtra("net.sf.briar.CONTACT_NAME");
 		if(contactName == null) throw new IllegalStateException();
 		setTitle(contactName);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.LOCAL_AUTHOR_ID");
+		if(b == null) throw new IllegalStateException();
+		localAuthorId = new AuthorId(b);
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		layout.setLayoutParams(MATCH_MATCH);
 		layout.setOrientation(VERTICAL);
 		layout.setGravity(CENTER_HORIZONTAL);
 
-		adapter = new ConversationAdapter(this);
+		adapter = new ConversationAdapter(this, contactName);
 		list = new ListView(this);
 		// Give me all the width and all the unused height
-		list.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		list.setLayoutParams(MATCH_WRAP_1);
 		list.setAdapter(adapter);
 		list.setOnItemClickListener(this);
 		layout.addView(list);
@@ -92,7 +100,7 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
@@ -108,17 +116,16 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
 				try {
-					// Wait for the service to be bound and started
 					serviceConnection.waitForStartup();
-					// Load the headers from the database
 					long now = System.currentTimeMillis();
+					LocalAuthor localAuthor = db.getLocalAuthor(localAuthorId);
+					localAuthorName = localAuthor.getName();
 					Collection<PrivateMessageHeader> headers =
 							db.getPrivateMessageHeaders(contactId);
 					long duration = System.currentTimeMillis() - now;
 					if(LOG.isLoggable(INFO))
 						LOG.info("Load took " + duration + " ms");
-					// Display the headers in the UI
-					displayHeaders(headers);
+					displayHeaders(localAuthor, headers);
 				} catch(NoSuchContactException e) {
 					if(LOG.isLoggable(INFO)) LOG.info("Contact removed");
 					finishOnUiThread();
@@ -134,10 +141,11 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 		});
 	}
 
-	private void displayHeaders(
+	private void displayHeaders(final LocalAuthor localAuthor,
 			final Collection<PrivateMessageHeader> headers) {
 		runOnUiThread(new Runnable() {
 			public void run() {
+				adapter.setLocalAuthorName(localAuthor.getName());
 				adapter.clear();
 				for(PrivateMessageHeader h : headers) adapter.add(h);
 				adapter.sort(AscendingHeaderComparator.INSTANCE);
@@ -205,6 +213,7 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 	public void onClick(View view) {
 		Intent i = new Intent(this, WritePrivateMessageActivity.class);
 		i.putExtra("net.sf.briar.CONTACT_ID", contactId.getInt());
+		i.putExtra("net.sf.briar.LOCAL_AUTHOR_ID", localAuthorId.getBytes());
 		startActivity(i);
 	}
 
@@ -218,12 +227,11 @@ implements DatabaseListener, OnClickListener, OnItemClickListener {
 		Intent i = new Intent(this, ReadPrivateMessageActivity.class);
 		i.putExtra("net.sf.briar.CONTACT_ID", contactId.getInt());
 		i.putExtra("net.sf.briar.CONTACT_NAME", contactName);
+		i.putExtra("net.sf.briar.LOCAL_AUTHOR_NAME", localAuthorName);
 		i.putExtra("net.sf.briar.MESSAGE_ID", item.getId().getBytes());
 		i.putExtra("net.sf.briar.CONTENT_TYPE", item.getContentType());
 		i.putExtra("net.sf.briar.TIMESTAMP", item.getTimestamp());
 		i.putExtra("net.sf.briar.INCOMING", item.isIncoming());
-		i.putExtra("net.sf.briar.FIRST", position == 0);
-		i.putExtra("net.sf.briar.LAST", position == adapter.getCount() - 1);
 		startActivityForResult(i, position);
 	}
 }

briar-android/src/net/sf/briar/android/messages/ConversationAdapter.java

@@ -2,14 +2,16 @@ package net.sf.briar.android.messages;
 
 import static android.graphics.Typeface.BOLD;
 import static android.widget.LinearLayout.HORIZONTAL;
+import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 
 import java.util.ArrayList;
 
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.db.PrivateMessageHeader;
+import net.sf.briar.util.StringUtils;
 import android.content.Context;
 import android.content.res.Resources;
 import android.text.format.DateUtils;
@@ -22,15 +24,26 @@ import android.widget.TextView;
 
 class ConversationAdapter extends ArrayAdapter<PrivateMessageHeader> {
 
-	ConversationAdapter(Context ctx) {
+	private final String contactName;
+
+	private String localAuthorName = null;
+
+	ConversationAdapter(Context ctx, String contactName) {
 		super(ctx, android.R.layout.simple_expandable_list_item_1,
 				new ArrayList<PrivateMessageHeader>());
+		this.contactName = contactName;
+	}
+
+	void setLocalAuthorName(String localAuthorName) {
+		this.localAuthorName = localAuthorName;
 	}
 
 	@Override
 	public View getView(int position, View convertView, ViewGroup parent) {
+		if(localAuthorName == null) throw new IllegalStateException();
 		PrivateMessageHeader item = getItem(position);
 		Context ctx = getContext();
+
 		LinearLayout layout = new LinearLayout(ctx);
 		layout.setOrientation(HORIZONTAL);
 		if(!item.isRead()) {
@@ -38,23 +51,40 @@ class ConversationAdapter extends ArrayAdapter<PrivateMessageHeader> {
 			layout.setBackgroundColor(res.getColor(R.color.unread_background));
 		}
 
+		LinearLayout innerLayout = new LinearLayout(ctx);
+		// Give me all the unused width
+		innerLayout.setLayoutParams(WRAP_WRAP_1);
+		innerLayout.setOrientation(VERTICAL);
+
+		TextView name = new TextView(ctx);
+		name.setTextSize(18);
+		name.setMaxLines(1);
+		name.setPadding(10, 10, 10, 10);
+		if(item.isIncoming()) name.setText(contactName);
+		else name.setText(localAuthorName);
+		innerLayout.addView(name);
+
 		if(item.getContentType().equals("text/plain")) {
-			TextView subject = new TextView(ctx);
-			// Give me all the unused width
-			subject.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
-			subject.setTextSize(14);
-			subject.setMaxLines(2);
-			subject.setPadding(10, 10, 10, 10);
-			if(!item.isRead()) subject.setTypeface(null, BOLD);
-			subject.setText(item.getSubject());
-			layout.addView(subject);
+			if(!StringUtils.isNullOrEmpty(item.getSubject())) {
+				TextView subject = new TextView(ctx);
+				subject.setTextSize(14);
+				subject.setMaxLines(2);
+				subject.setPadding(10, 0, 10, 10);
+				if(!item.isRead()) subject.setTypeface(null, BOLD);
+				subject.setText(item.getSubject());
+				innerLayout.addView(subject);
+			}
 		} else {
+			LinearLayout attachmentLayout = new LinearLayout(ctx);
+			attachmentLayout.setOrientation(HORIZONTAL);
 			ImageView attachment = new ImageView(ctx);
-			attachment.setPadding(10, 10, 10, 10);
+			attachment.setPadding(10, 0, 10, 10);
 			attachment.setImageResource(R.drawable.content_attachment);
-			layout.addView(attachment);
-			layout.addView(new HorizontalSpace(ctx));
+			attachmentLayout.addView(attachment);
+			attachmentLayout.addView(new HorizontalSpace(ctx));
+			innerLayout.addView(attachmentLayout);
 		}
+		layout.addView(innerLayout);
 
 		TextView date = new TextView(ctx);
 		date.setTextSize(14);

briar-android/src/net/sf/briar/android/messages/ConversationListActivity.java

@@ -4,6 +4,8 @@ import static android.view.Gravity.CENTER_HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_MATCH;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -16,7 +18,6 @@ import net.sf.briar.R;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
 import net.sf.briar.api.Contact;
 import net.sf.briar.api.ContactId;
@@ -52,7 +53,7 @@ implements OnClickListener, DatabaseListener {
 	private ConversationListAdapter adapter = null;
 	private ListView list = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 
@@ -60,14 +61,14 @@ implements OnClickListener, DatabaseListener {
 	public void onCreate(Bundle state) {
 		super.onCreate(null);
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_MATCH);
+		layout.setLayoutParams(MATCH_MATCH);
 		layout.setOrientation(VERTICAL);
 		layout.setGravity(CENTER_HORIZONTAL);
 
 		adapter = new ConversationListAdapter(this);
 		list = new ListView(this);
 		// Give me all the width and all the unused height
-		list.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		list.setLayoutParams(MATCH_WRAP_1);
 		list.setAdapter(adapter);
 		list.setOnItemClickListener(adapter);
 		layout.addView(list);
@@ -82,7 +83,7 @@ implements OnClickListener, DatabaseListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}

briar-android/src/net/sf/briar/android/messages/ConversationListAdapter.java

@@ -5,11 +5,11 @@ import static android.view.Gravity.LEFT;
 import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 
 import java.util.ArrayList;
 
 import net.sf.briar.R;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.util.StringUtils;
 import android.content.Context;
 import android.content.Intent;
@@ -44,7 +44,7 @@ implements OnItemClickListener {
 
 		LinearLayout innerLayout = new LinearLayout(ctx);
 		// Give me all the unused width
-		innerLayout.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		innerLayout.setLayoutParams(WRAP_WRAP_1);
 		innerLayout.setOrientation(VERTICAL);
 		innerLayout.setGravity(LEFT);
 
@@ -85,6 +85,8 @@ implements OnItemClickListener {
 		Intent i = new Intent(getContext(), ConversationActivity.class);
 		i.putExtra("net.sf.briar.CONTACT_ID", item.getContactId().getInt());
 		i.putExtra("net.sf.briar.CONTACT_NAME", item.getContactName());
+		i.putExtra("net.sf.briar.LOCAL_AUTHOR_ID",
+				item.getLocalAuthorId().getBytes());
 		getContext().startActivity(i);
 	}
 }

briar-android/src/net/sf/briar/android/messages/ConversationListItem.java

@@ -4,6 +4,7 @@ import java.util.Collections;
 import java.util.List;
 
 import net.sf.briar.android.DescendingHeaderComparator;
+import net.sf.briar.api.AuthorId;
 import net.sf.briar.api.Contact;
 import net.sf.briar.api.ContactId;
 import net.sf.briar.api.db.PrivateMessageHeader;
@@ -34,6 +35,10 @@ class ConversationListItem {
 		return contact.getAuthor().getName();
 	}
 
+	AuthorId getLocalAuthorId() {
+		return contact.getLocalAuthorId();
+	}
+
 	String getSubject() {
 		return subject;
 	}

briar-android/src/net/sf/briar/android/messages/ReadPrivateMessageActivity.java

@@ -7,6 +7,9 @@ import static android.widget.LinearLayout.VERTICAL;
 import static java.text.DateFormat.SHORT;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP_1;
+import static net.sf.briar.android.widgets.CommonLayoutParams.WRAP_WRAP_1;
 
 import java.io.UnsupportedEncodingException;
 import java.util.concurrent.Executor;
@@ -16,7 +19,6 @@ import net.sf.briar.R;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalBorder;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.ContactId;
@@ -59,7 +61,7 @@ implements OnClickListener {
 	private ImageButton replyButton = null;
 	private TextView content = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	private volatile MessageId messageId = null;
@@ -69,22 +71,20 @@ implements OnClickListener {
 		super.onCreate(null);
 
 		Intent i = getIntent();
-		int cid = i.getIntExtra("net.sf.briar.CONTACT_ID", -1);
-		if(cid == -1) throw new IllegalStateException();
-		contactId = new ContactId(cid);
+		int id = i.getIntExtra("net.sf.briar.CONTACT_ID", -1);
+		if(id == -1) throw new IllegalStateException();
+		contactId = new ContactId(id);
 		String contactName = i.getStringExtra("net.sf.briar.CONTACT_NAME");
 		if(contactName == null) throw new IllegalStateException();
 		setTitle(contactName);
-		byte[] mid = i.getByteArrayExtra("net.sf.briar.MESSAGE_ID");
-		if(mid == null) throw new IllegalStateException();
-		messageId = new MessageId(mid);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.MESSAGE_ID");
+		if(b == null) throw new IllegalStateException();
+		messageId = new MessageId(b);
 		String contentType = i.getStringExtra("net.sf.briar.CONTENT_TYPE");
 		if(contentType == null) throw new IllegalStateException();
 		long timestamp = i.getLongExtra("net.sf.briar.TIMESTAMP", -1);
 		if(timestamp == -1) throw new IllegalStateException();
 		boolean incoming = i.getBooleanExtra("net.sf.briar.INCOMING", false);
-		boolean first = i.getBooleanExtra("net.sf.briar.FIRST", false);
-		boolean last = i.getBooleanExtra("net.sf.briar.LAST", false);
 
 		if(state != null && bundleEncrypter.decrypt(state)) {
 			read = state.getBoolean("net.sf.briar.READ");
@@ -94,12 +94,12 @@ implements OnClickListener {
 		}
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		layout.setLayoutParams(MATCH_WRAP);
 		layout.setOrientation(VERTICAL);
 
 		ScrollView scrollView = new ScrollView(this);
 		// Give me all the width and all the unused height
-		scrollView.setLayoutParams(CommonLayoutParams.MATCH_WRAP_1);
+		scrollView.setLayoutParams(MATCH_WRAP_1);
 
 		LinearLayout message = new LinearLayout(this);
 		message.setOrientation(VERTICAL);
@@ -107,13 +107,13 @@ implements OnClickListener {
 		message.setBackgroundColor(res.getColor(R.color.content_background));
 
 		LinearLayout header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
 		TextView name = new TextView(this);
 		// Give me all the unused width
-		name.setLayoutParams(CommonLayoutParams.WRAP_WRAP_1);
+		name.setLayoutParams(WRAP_WRAP_1);
 		name.setTextSize(18);
 		name.setMaxLines(1);
 		name.setPadding(10, 10, 10, 10);
@@ -144,7 +144,7 @@ implements OnClickListener {
 		layout.addView(new HorizontalBorder(this));
 
 		LinearLayout footer = new LinearLayout(this);
-		footer.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		footer.setLayoutParams(MATCH_WRAP);
 		footer.setOrientation(HORIZONTAL);
 		footer.setGravity(CENTER);
 
@@ -160,7 +160,6 @@ implements OnClickListener {
 		prevButton.setBackgroundResource(0);
 		prevButton.setImageResource(R.drawable.navigation_previous_item);
 		prevButton.setOnClickListener(this);
-		prevButton.setEnabled(!first);
 		footer.addView(prevButton);
 		footer.addView(new HorizontalSpace(this));
 
@@ -168,7 +167,6 @@ implements OnClickListener {
 		nextButton.setBackgroundResource(0);
 		nextButton.setImageResource(R.drawable.navigation_next_item);
 		nextButton.setOnClickListener(this);
-		nextButton.setEnabled(!last);
 		footer.addView(nextButton);
 		footer.addView(new HorizontalSpace(this));
 
@@ -181,7 +179,7 @@ implements OnClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}

briar-android/src/net/sf/briar/android/messages/WritePrivateMessageActivity.java

@@ -5,6 +5,7 @@ import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.LinearLayout.VERTICAL;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static net.sf.briar.android.widgets.CommonLayoutParams.MATCH_WRAP;
 
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
@@ -17,7 +18,6 @@ import net.sf.briar.R;
 import net.sf.briar.android.BriarActivity;
 import net.sf.briar.android.BriarService;
 import net.sf.briar.android.BriarService.BriarServiceConnection;
-import net.sf.briar.android.widgets.CommonLayoutParams;
 import net.sf.briar.android.widgets.HorizontalSpace;
 import net.sf.briar.api.AuthorId;
 import net.sf.briar.api.Contact;
@@ -61,7 +61,7 @@ implements OnItemSelectedListener, OnClickListener {
 	private ImageButton sendButton = null;
 	private EditText content = null;
 
-	// Fields that are accessed from DB threads must be volatile
+	// Fields that are accessed from background threads must be volatile
 	@Inject private volatile DatabaseComponent db;
 	@Inject @DatabaseUiExecutor private volatile Executor dbUiExecutor;
 	@Inject private volatile MessageFactory messageFactory;
@@ -74,17 +74,17 @@ implements OnItemSelectedListener, OnClickListener {
 		super.onCreate(null);
 
 		Intent i = getIntent();
-		int cid = i.getIntExtra("net.sf.briar.CONTACT_ID", -1);
-		if(cid != -1) contactId = new ContactId(cid);
-		byte[] pid = i.getByteArrayExtra("net.sf.briar.PARENT_ID");
-		if(pid != null) parentId = new MessageId(pid);
+		int id = i.getIntExtra("net.sf.briar.CONTACT_ID", -1);
+		if(id != -1) contactId = new ContactId(id);
+		byte[] b = i.getByteArrayExtra("net.sf.briar.PARENT_ID");
+		if(b != null) parentId = new MessageId(b);
 
 		LinearLayout layout = new LinearLayout(this);
-		layout.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		layout.setLayoutParams(MATCH_WRAP);
 		layout.setOrientation(VERTICAL);
 
 		LinearLayout header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
@@ -106,7 +106,7 @@ implements OnItemSelectedListener, OnClickListener {
 		layout.addView(header);
 
 		header = new LinearLayout(this);
-		header.setLayoutParams(CommonLayoutParams.MATCH_WRAP);
+		header.setLayoutParams(MATCH_WRAP);
 		header.setOrientation(HORIZONTAL);
 		header.setGravity(CENTER_VERTICAL);
 
@@ -120,7 +120,6 @@ implements OnItemSelectedListener, OnClickListener {
 		spinner = new Spinner(this);
 		spinner.setAdapter(adapter);
 		spinner.setOnItemSelectedListener(this);
-		loadContactList();
 		header.addView(spinner);
 		layout.addView(header);
 
@@ -134,17 +133,23 @@ implements OnItemSelectedListener, OnClickListener {
 
 		setContentView(layout);
 
-		// Bind to the service so we can wait for the DB to be opened
+		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
 	}
 
-	private void loadContactList() {
+	@Override
+	public void onResume() {
+		super.onResume();
+		loadContacts();
+	}
+
+	private void loadContacts() {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
 				try {
 					serviceConnection.waitForStartup();
-					displayContactList(db.getContacts());
+					displayContacts(db.getContacts());
 				} catch(DbException e) {
 					if(LOG.isLoggable(WARNING))
 						LOG.log(WARNING, e.toString(), e);
@@ -156,7 +161,7 @@ implements OnItemSelectedListener, OnClickListener {
 		});
 	}
 
-	private void displayContactList(final Collection<Contact> contacts) {
+	private void displayContacts(final Collection<Contact> contacts) {
 		runOnUiThread(new Runnable() {
 			public void run() {
 				int index = -1;
@@ -189,11 +194,6 @@ implements OnItemSelectedListener, OnClickListener {
 		contactId = c.getId();
 	}
 
-	public void onNothingSelected(AdapterView<?> parent) {
-		contactId = null;
-		sendButton.setEnabled(false);
-	}
-
 	private void loadLocalAuthor(final AuthorId a) {
 		dbUiExecutor.execute(new Runnable() {
 			public void run() {
@@ -215,13 +215,18 @@ implements OnItemSelectedListener, OnClickListener {
 			}
 		});
 	}
-	
+
+	public void onNothingSelected(AdapterView<?> parent) {
+		contactId = null;
+		sendButton.setEnabled(false);
+	}
+
 	public void onClick(View view) {
 		if(localAuthor == null || contactId == null)
 			throw new IllegalStateException();
 		try {
-			storeMessage(localAuthor, contactId,
-					content.getText().toString().getBytes("UTF-8"));
+			byte[] b = content.getText().toString().getBytes("UTF-8");
+			storeMessage(localAuthor, contactId, b);
 		} catch(UnsupportedEncodingException e) {
 			throw new RuntimeException(e);
 		}

briar-android/src/net/sf/briar/android/widgets/HorizontalBorder.java

@@ -3,16 +3,17 @@ package net.sf.briar.android.widgets;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import net.sf.briar.R;
 import android.content.Context;
+import android.content.res.Resources;
 import android.view.View;
 import android.widget.LinearLayout.LayoutParams;
 
 public class HorizontalBorder extends View {
 
-	private static final int LINE_WIDTH = 5;
-
 	public HorizontalBorder(Context ctx) {
 		super(ctx);
-		setLayoutParams(new LayoutParams(MATCH_PARENT, LINE_WIDTH));
+		Resources res = ctx.getResources();
+		int width = res.getInteger(R.integer.horizontal_border_width);
+		setLayoutParams(new LayoutParams(MATCH_PARENT, width));
 		setBackgroundColor(getResources().getColor(R.color.horizontal_border));
 	}
 }