Show mailbox onboarding/download info

if the mailbox is not yet set up.

briar-android/src/main/java/org/briarproject/briar/android/activity/ActivityComponent.java

@@ -46,6 +46,7 @@ import org.briarproject.briar.android.login.ChangePasswordActivity;
 import org.briarproject.briar.android.login.OpenDatabaseFragment;
 import org.briarproject.briar.android.login.PasswordFragment;
 import org.briarproject.briar.android.login.StartupActivity;
+import org.briarproject.briar.android.mailbox.MailboxActivity;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
 import org.briarproject.briar.android.navdrawer.TransportsActivity;
 import org.briarproject.briar.android.panic.PanicPreferencesActivity;
@@ -250,4 +251,6 @@ public interface ActivityComponent {
 	void inject(RssFeedDeleteFeedDialogFragment fragment);
 
 	void inject(ConnectViaBluetoothActivity connectViaBluetoothActivity);
+
+	void inject(MailboxActivity mailboxActivity);
 }

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxActivity.java

@@ -0,0 +1,75 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.MenuItem;
+import android.widget.ProgressBar;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+
+import javax.inject.Inject;
+
+import androidx.annotation.Nullable;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class MailboxActivity extends BriarActivity {
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private MailboxViewModel viewModel;
+	private ProgressBar progressBar;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+
+		viewModel = new ViewModelProvider(this, viewModelFactory)
+				.get(MailboxViewModel.class);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_mailbox);
+
+		progressBar = findViewById(R.id.progressBar);
+		if (viewModel.getState().getValue() == null) {
+			progressBar.setVisibility(VISIBLE);
+		}
+
+		if (savedInstanceState == null) {
+			viewModel.getState().observe(this, state -> {
+				if (state instanceof MailboxState.NotSetup) {
+					onNotSetup();
+				}
+			});
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		if (item.getItemId() == android.R.id.home) {
+			onBackPressed();
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	private void onNotSetup() {
+		progressBar.setVisibility(INVISIBLE);
+		getSupportFragmentManager().beginTransaction()
+				.replace(R.id.fragmentContainer, new SetupIntroFragment(),
+						SetupIntroFragment.TAG)
+				.commit();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxModule.java

@@ -12,8 +12,7 @@ public interface MailboxModule {
 
 	@Binds
 	@IntoMap
-	@ViewModelKey(MailboxPairViewModel.class)
-	ViewModel bindMailboxViewModel(
-			MailboxPairViewModel mailboxPairViewModel);
+	@ViewModelKey(MailboxViewModel.class)
+	ViewModel bindMailboxViewModel(MailboxViewModel mailboxViewModel);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxState.java

@@ -0,0 +1,10 @@
+package org.briarproject.briar.android.mailbox;
+
+class MailboxState {
+
+	static class NotSetup extends MailboxState {
+	}
+
+	// TODO add other states
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxViewModel.java

@@ -12,6 +12,7 @@ import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.util.StringUtils;
+import org.briarproject.briar.android.mailbox.MailboxState.NotSetup;
 import org.briarproject.briar.android.qrcode.QrCodeDecoder;
 import org.briarproject.briar.android.viewmodel.DbViewModel;
 
@@ -24,32 +25,35 @@ import javax.inject.Inject;
 
 import androidx.annotation.Nullable;
 import androidx.annotation.UiThread;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Logger.getLogger;
 
-@UiThread
 @NotNullByDefault
-class MailboxPairViewModel extends DbViewModel
+class MailboxViewModel extends DbViewModel
 		implements QrCodeDecoder.ResultCallback {
-	private static final Logger LOG =
-			getLogger(MailboxPairViewModel.class.getName());
 
-	private static final int VERSION_REQUIRED = 32;
+	private static final Logger LOG =
+			getLogger(MailboxViewModel.class.getName());
 
 	@SuppressWarnings("CharsetObjectCanBeUsed") // Requires minSdkVersion >= 19
 	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
+	private static final int VERSION_REQUIRED = 32;
 
 	private final CryptoComponent crypto;
 	private final QrCodeDecoder qrCodeDecoder;
 
+	private final MutableLiveData<MailboxState> state = new MutableLiveData<>();
+
 	@Nullable
 	private String onionAddress = null;
 	@Nullable
 	private String setupToken = null;
 
 	@Inject
-	MailboxPairViewModel(
+	MailboxViewModel(
 			Application app,
 			@DatabaseExecutor Executor dbExecutor,
 			LifecycleManager lifecycleManager,
@@ -60,9 +64,29 @@ class MailboxPairViewModel extends DbViewModel
 		super(app, dbExecutor, lifecycleManager, db, androidExecutor);
 		this.crypto = crypto;
 		qrCodeDecoder = new QrCodeDecoder(androidExecutor, ioExecutor, this);
+		checkIfSetup();
+	}
+
+	@UiThread
+	private void checkIfSetup() {
+		runOnDbThread(() -> {
+			// TODO really check if mailbox is setup/paired/linked
+			try {
+				Thread.sleep(1000);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+			state.postValue(new NotSetup());
+		});
+	}
+
+	@UiThread
+	LiveData<MailboxState> getState() {
+		return state;
 	}
 
 	@Override
+	@IoExecutor
 	public void onQrCodeDecoded(Result result) {
 		LOG.info("Got result from decoder");
 		byte[] bytes = result.getText().getBytes(ISO_8859_1);

briar-android/src/main/java/org/briarproject/briar/android/mailbox/SetupDownloadFragment.java

@@ -0,0 +1,76 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import static android.content.Intent.ACTION_SEND;
+import static android.content.Intent.EXTRA_TEXT;
+import static android.widget.Toast.LENGTH_LONG;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class SetupDownloadFragment extends Fragment {
+
+	static final String TAG = SetupDownloadFragment.class.getName();
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = inflater.inflate(R.layout.fragment_mailbox_setup_download,
+				container, false);
+		Button shareLinkButton = v.findViewById(R.id.shareLinkButton);
+		Button scanButton = v.findViewById(R.id.scanButton);
+		shareLinkButton.setOnClickListener(this::shareLink);
+		scanButton.setOnClickListener(this::scanCode);
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_title);
+	}
+
+	private void shareLink(View v) {
+		Context ctx = requireContext();
+		String fdroid = ctx.getString(R.string.mailbox_share_fdroid);
+		String gplay = ctx.getString(R.string.mailbox_share_gplay);
+		String download = ctx.getString(R.string.mailbox_share_download);
+		String text = ctx.getString(R.string.mailbox_share_text, fdroid, gplay,
+				download);
+
+		Intent sendIntent = new Intent();
+		sendIntent.setAction(ACTION_SEND);
+		sendIntent.putExtra(EXTRA_TEXT, text);
+		sendIntent.setType("text/plain");
+
+		Intent shareIntent = Intent.createChooser(sendIntent, null);
+		try {
+			startActivity(shareIntent);
+		} catch (ActivityNotFoundException e) {
+			Toast.makeText(ctx, R.string.error_start_activity, LENGTH_LONG)
+					.show();
+		}
+	}
+
+	private void scanCode(View v) {
+		Toast.makeText(requireContext(), "TODO", LENGTH_LONG).show();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/SetupIntroFragment.java

@@ -0,0 +1,47 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class SetupIntroFragment extends Fragment {
+
+	static final String TAG = SetupIntroFragment.class.getName();
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = inflater.inflate(R.layout.fragment_mailbox_setup_intro,
+				container, false);
+		Button button = v.findViewById(R.id.continueButton);
+		button.setOnClickListener(view -> {
+			FragmentManager fm = getParentFragmentManager();
+			Fragment f = new SetupDownloadFragment();
+			showFragment(fm, f, SetupDownloadFragment.TAG);
+		});
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_title);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/settings/SettingsFragment.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android.settings;
 
 import android.content.Context;
+import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.View;
@@ -8,6 +9,7 @@ import android.view.View;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.R;
+import org.briarproject.briar.android.mailbox.MailboxActivity;
 import org.briarproject.briar.android.util.ActivityLaunchers.GetImageAdvanced;
 
 import javax.inject.Inject;
@@ -74,7 +76,8 @@ public class SettingsFragment extends PreferenceFragmentCompat {
 				requireNonNull(findPreference(PREF_KEY_MAILBOX));
 		if (viewModel.shouldEnableMailbox()) {
 			prefMailbox.setOnPreferenceClickListener(preference -> {
-				// TODO show mailbox status/onboarding
+				Intent i = new Intent(requireContext(), MailboxActivity.class);
+				startActivity(i);
 				return true;
 			});
 		} else {