Factor out a reuseable MessageFragment

briar-android/res/layout/activity_share.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<FrameLayout
-	android:id="@+id/shareContainer"
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:layout_width="match_parent"
-	android:layout_height="match_parent"/>

briar-android/res/layout/fragment_message.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<org.briarproject.android.view.LargeTextInputView
+	android:id="@+id/messageView"
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	app:buttonText="@string/forum_share_button"
+	app:fillHeight="true"
+	app:hint="@string/forum_share_message"/>

briar-android/res/layout/fragment_share_message.xml

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto"
-	android:layout_width="match_parent"
-	android:layout_height="match_parent"
-	android:orientation="vertical">
-
-	<TextView
-		android:id="@+id/introductionText"
-		android:layout_width="match_parent"
-		android:layout_height="wrap_content"
-		android:padding="@dimen/margin_activity_horizontal"
-		android:text="@string/forum_share_message"
-		android:textColor="@color/briar_text_primary"
-		android:textSize="@dimen/text_size_medium"/>
-
-	<org.briarproject.android.view.LargeTextInputView
-		android:id="@+id/invitationMessageView"
-		android:layout_width="match_parent"
-		android:layout_height="0dp"
-		android:layout_weight="1"
-		android:gravity="bottom"
-		app:buttonText="@string/forum_share_button"
-		app:fillHeight="true"
-		app:hint="@string/introduction_message_hint"/>
-
-</LinearLayout>

briar-android/src/org/briarproject/android/sharing/BaseMessageFragment.java

@@ -0,0 +1,94 @@
+package org.briarproject.android.sharing;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.support.annotation.StringRes;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.R;
+import org.briarproject.android.fragment.BaseFragment;
+import org.briarproject.android.view.LargeTextInputView;
+import org.briarproject.android.view.TextInputView.TextInputListener;
+import org.briarproject.util.StringUtils;
+
+import static org.briarproject.api.sharing.SharingConstants.MAX_INVITATION_MESSAGE_LENGTH;
+import static org.briarproject.util.StringUtils.truncateUtf8;
+
+abstract class BaseMessageFragment extends BaseFragment
+		implements TextInputListener {
+
+	protected LargeTextInputView message;
+	private MessageFragmentListener listener;
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		listener = (MessageFragmentListener) context;
+	}
+
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container,
+			Bundle savedInstanceState) {
+
+		// allow for "up" button to act as back button
+		setHasOptionsMenu(true);
+
+		// inflate view
+		View v = inflater.inflate(R.layout.fragment_message, container,
+				false);
+		message = (LargeTextInputView) v.findViewById(R.id.messageView);
+		message.setButtonText(getString(getButtonText()));
+		message.setHint(getHintText());
+		message.setListener(this);
+
+		return v;
+	}
+
+	protected void setTitle(int res) {
+		listener.setTitle(res);
+	}
+
+	protected abstract @StringRes int getButtonText();
+	protected abstract @StringRes int getHintText();
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		message.showSoftKeyboard();
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		switch (item.getItemId()) {
+			case android.R.id.home:
+				listener.onBackPressed();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	@Override
+	public void onSendClick(String msg) {
+		// disable button to prevent accidental double actions
+		message.setSendButtonEnabled(false);
+		message.hideSoftKeyboard();
+
+		msg = truncateUtf8(msg, MAX_INVITATION_MESSAGE_LENGTH);
+		listener.onButtonClick(msg);
+	}
+
+	public interface MessageFragmentListener {
+
+		void onBackPressed();
+
+		void setTitle(@StringRes int titleRes);
+
+		void onButtonClick(String message);
+
+	}
+
+}

briar-android/src/org/briarproject/android/sharing/ShareActivity.java

@@ -2,11 +2,14 @@ package org.briarproject.android.sharing;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.view.View;
+import android.support.annotation.StringRes;
+import android.support.annotation.UiThread;
+import android.widget.Toast;
 
 import org.briarproject.R;
 import org.briarproject.android.BriarActivity;
 import org.briarproject.android.fragment.BaseFragment.BaseFragmentListener;
+import org.briarproject.android.sharing.BaseMessageFragment.MessageFragmentListener;
 import org.briarproject.api.contact.Contact;
 import org.briarproject.api.contact.ContactId;
 import org.briarproject.api.db.DbException;
@@ -15,34 +18,77 @@ import org.briarproject.api.sync.GroupId;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.logging.Logger;
+
+import static android.widget.Toast.LENGTH_SHORT;
+import static java.util.logging.Level.WARNING;
 
 public abstract class ShareActivity extends BriarActivity implements
-		BaseFragmentListener, ContactSelectorListener {
+		BaseFragmentListener, ContactSelectorListener, MessageFragmentListener {
 
+	private final static Logger LOG =
+			Logger.getLogger(ShareActivity.class.getName());
 	final static String CONTACTS = "contacts";
 
-	@Override
-	public void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
+	private volatile GroupId groupId;
+	private volatile Collection<ContactId> contacts;
 
-		setContentView(R.layout.activity_share);
+	@Override
+	public void onCreate(Bundle bundle) {
+		super.onCreate(bundle);
+
+		setContentView(R.layout.activity_fragment_container);
 
 		Intent i = getIntent();
 		byte[] b = i.getByteArrayExtra(GROUP_ID);
 		if (b == null) throw new IllegalStateException("No GroupId");
-		GroupId groupId = new GroupId(b);
+		groupId = new GroupId(b);
 
-		if (savedInstanceState == null) {
+		if (bundle == null) {
 			ContactSelectorFragment contactSelectorFragment =
 					ContactSelectorFragment.newInstance(groupId);
 			getSupportFragmentManager().beginTransaction()
-					.add(R.id.shareContainer, contactSelectorFragment)
+					.add(R.id.fragmentContainer, contactSelectorFragment)
 					.commit();
+		} else {
+			ArrayList<Integer> intContacts =
+					bundle.getIntegerArrayList(CONTACTS);
+			if (intContacts != null) {
+				contacts = getContactsFromIntegers(intContacts);
+			}
 		}
 	}
 
-	abstract ShareMessageFragment getMessageFragment(GroupId groupId,
-			Collection<ContactId> contacts);
+	@Override
+	public void onSaveInstanceState(Bundle outState) {
+		super.onSaveInstanceState(outState);
+		if (contacts != null) {
+			outState.putIntegerArrayList(CONTACTS,
+					getContactsFromIds(contacts));
+		}
+	}
+
+	@UiThread
+	@Override
+	public void contactsSelected(GroupId groupId,
+			Collection<ContactId> contacts) {
+		this.groupId = groupId;
+		this.contacts = contacts;
+
+		BaseMessageFragment messageFragment = getMessageFragment();
+
+		getSupportFragmentManager().beginTransaction()
+				.setCustomAnimations(android.R.anim.fade_in,
+						android.R.anim.fade_out,
+						android.R.anim.slide_in_left,
+						android.R.anim.slide_out_right)
+				.replace(R.id.fragmentContainer, messageFragment,
+						ContactSelectorFragment.TAG)
+				.addToBackStack(null)
+				.commit();
+	}
+
+	abstract BaseMessageFragment getMessageFragment();
 
 	/**
 	 * This must only be called from a DbThread
@@ -50,26 +96,8 @@ public abstract class ShareActivity extends BriarActivity implements
 	public abstract boolean isDisabled(GroupId groupId, Contact c)
 			throws DbException;
 
-	@Override
-	public void contactsSelected(GroupId groupId,
-			Collection<ContactId> contacts) {
-		ShareMessageFragment messageFragment =
-				getMessageFragment(groupId, contacts);
-
-		getSupportFragmentManager().beginTransaction()
-				.setCustomAnimations(android.R.anim.fade_in,
-						android.R.anim.fade_out,
-						android.R.anim.slide_in_left,
-						android.R.anim.slide_out_right)
-				.replace(R.id.shareContainer, messageFragment,
-						ContactSelectorFragment.TAG)
-				.addToBackStack(null)
-				.commit();
-	}
-
 	static ArrayList<Integer> getContactsFromIds(
 			Collection<ContactId> contacts) {
-
 		// transform ContactIds to Integers so they can be added to a bundle
 		ArrayList<Integer> intContacts = new ArrayList<>(contacts.size());
 		for (ContactId contactId : contacts) {
@@ -78,15 +106,8 @@ public abstract class ShareActivity extends BriarActivity implements
 		return intContacts;
 	}
 
-	void sharingSuccessful(View v) {
-		setResult(RESULT_OK);
-		hideSoftKeyboard(v);
-		supportFinishAfterTransition();
-	}
-
 	static Collection<ContactId> getContactsFromIntegers(
 			ArrayList<Integer> intContacts) {
-
 		// turn contact integers from a bundle back to ContactIds
 		List<ContactId> contacts = new ArrayList<>(intContacts.size());
 		for (Integer c : intContacts) {
@@ -95,6 +116,50 @@ public abstract class ShareActivity extends BriarActivity implements
 		return contacts;
 	}
 
+	@UiThread
+	@Override
+	public void onButtonClick(String message) {
+		share(message);
+		setResult(RESULT_OK);
+		supportFinishAfterTransition();
+	}
+
+	private void share(final String msg) {
+		runOnDbThread(new Runnable() {
+			@Override
+			public void run() {
+				try {
+					for (ContactId c : contacts) {
+						share(groupId, c, msg);
+					}
+				} catch (DbException e) {
+					// TODO proper error handling
+					sharingError();
+					if (LOG.isLoggable(WARNING))
+						LOG.log(WARNING, e.toString(), e);
+				}
+			}
+		});
+	}
+
+	/**
+	 * This method must be run from the DbThread.
+	 */
+	protected abstract void share(GroupId g, ContactId c, String msg)
+			throws DbException;
+
+	private void sharingError() {
+		runOnUiThreadUnlessDestroyed(new Runnable() {
+			@Override
+			public void run() {
+				int res = getSharingError();
+				Toast.makeText(ShareActivity.this, res, LENGTH_SHORT).show();
+			}
+		});
+	}
+
+	protected abstract @StringRes int getSharingError();
+
 	@Override
 	public void onFragmentCreated(String tag) {
 

briar-android/src/org/briarproject/android/sharing/ShareBlogActivity.java

@@ -1,5 +1,6 @@
 package org.briarproject.android.sharing;
 
+import org.briarproject.R;
 import org.briarproject.android.ActivityComponent;
 import org.briarproject.api.blogs.BlogSharingManager;
 import org.briarproject.api.contact.Contact;
@@ -7,18 +8,17 @@ import org.briarproject.api.contact.ContactId;
 import org.briarproject.api.db.DbException;
 import org.briarproject.api.sync.GroupId;
 
-import java.util.Collection;
-
 import javax.inject.Inject;
 
 public class ShareBlogActivity extends ShareActivity {
 
+	// Fields that are accessed from background threads must be volatile
 	@Inject
-	volatile BlogSharingManager blogSharingManager;
+	protected volatile BlogSharingManager blogSharingManager;
 
-	ShareMessageFragment getMessageFragment(GroupId groupId,
-			Collection<ContactId> contacts) {
-		return ShareBlogMessageFragment.newInstance(groupId, contacts);
+	@Override
+	BaseMessageFragment getMessageFragment() {
+		return ShareBlogMessageFragment.newInstance();
 	}
 
 	@Override
@@ -26,10 +26,20 @@ public class ShareBlogActivity extends ShareActivity {
 		component.inject(this);
 	}
 
-	/**
-	 * This must only be called from a DbThread
-	 */
+	@Override
 	public boolean isDisabled(GroupId groupId, Contact c) throws DbException {
 		return !blogSharingManager.canBeShared(groupId, c);
 	}
+
+	@Override
+	protected void share(GroupId g, ContactId c, String msg)
+			throws DbException {
+		blogSharingManager.sendInvitation(g, c, msg);
+	}
+
+	@Override
+	protected int getSharingError() {
+		return R.string.blogs_sharing_error;
+	}
+
 }

briar-android/src/org/briarproject/android/sharing/ShareBlogMessageFragment.java

@@ -4,38 +4,16 @@ import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Toast;
 
 import org.briarproject.R;
 import org.briarproject.android.ActivityComponent;
-import org.briarproject.api.blogs.BlogSharingManager;
-import org.briarproject.api.contact.ContactId;
-import org.briarproject.api.db.DbException;
-import org.briarproject.api.sync.GroupId;
 
-import java.util.Collection;
-import java.util.logging.Logger;
-
-import javax.inject.Inject;
-
-import static android.widget.Toast.LENGTH_SHORT;
-import static java.util.logging.Level.WARNING;
-
-public class ShareBlogMessageFragment extends ShareMessageFragment {
+public class ShareBlogMessageFragment extends BaseMessageFragment {
 
 	public final static String TAG = ShareBlogMessageFragment.class.getName();
-	private static final Logger LOG = Logger.getLogger(TAG);
 
-	// Fields that are accessed from background threads must be volatile
-	@Inject
-	protected volatile BlogSharingManager blogSharingManager;
-
-	public static ShareBlogMessageFragment newInstance(GroupId groupId,
-			Collection<ContactId> contacts) {
-
-		ShareBlogMessageFragment fragment = new ShareBlogMessageFragment();
-		fragment.setArguments(getArguments(groupId, contacts));
-		return fragment;
+	public static ShareBlogMessageFragment newInstance() {
+		return new ShareBlogMessageFragment();
 	}
 
 	@Override
@@ -43,10 +21,17 @@ public class ShareBlogMessageFragment extends ShareMessageFragment {
 			Bundle savedInstanceState) {
 
 		setTitle(R.string.blogs_sharing_share);
+		return super.onCreateView(inflater, container, savedInstanceState);
+	}
 
-		View v = super.onCreateView(inflater, container, savedInstanceState);
-		ui.message.setButtonText(getString(R.string.blogs_sharing_button));
-		return v;
+	@Override
+	protected int getButtonText() {
+		return R.string.blogs_sharing_button;
+	}
+
+	@Override
+	protected int getHintText() {
+		return R.string.forum_share_message;
 	}
 
 	@Override
@@ -59,32 +44,4 @@ public class ShareBlogMessageFragment extends ShareMessageFragment {
 		return TAG;
 	}
 
-	@Override
-	protected void share(final String msg) {
-		listener.runOnDbThread(new Runnable() {
-			@Override
-			public void run() {
-				try {
-					for (ContactId c : getContacts()) {
-						blogSharingManager.sendInvitation(getGroupId(), c, msg);
-					}
-				} catch (DbException e) {
-					sharingError();
-					if (LOG.isLoggable(WARNING))
-						LOG.log(WARNING, e.toString(), e);
-				}
-			}
-		});
-	}
-
-	@Override
-	protected void sharingError() {
-		listener.runOnUiThreadUnlessDestroyed(new Runnable() {
-			@Override
-			public void run() {
-				int res = R.string.blogs_sharing_error;
-				Toast.makeText(getContext(), res, LENGTH_SHORT).show();
-			}
-		});
-	}
 }

briar-android/src/org/briarproject/android/sharing/ShareForumActivity.java

@@ -1,5 +1,6 @@
 package org.briarproject.android.sharing;
 
+import org.briarproject.R;
 import org.briarproject.android.ActivityComponent;
 import org.briarproject.api.contact.Contact;
 import org.briarproject.api.contact.ContactId;
@@ -7,17 +8,17 @@ import org.briarproject.api.db.DbException;
 import org.briarproject.api.forum.ForumSharingManager;
 import org.briarproject.api.sync.GroupId;
 
-import java.util.Collection;
-
 import javax.inject.Inject;
 
 public class ShareForumActivity extends ShareActivity {
-	@Inject
-	volatile ForumSharingManager forumSharingManager;
 
-	ShareMessageFragment getMessageFragment(GroupId groupId,
-			Collection<ContactId> contacts) {
-		return ShareForumMessageFragment.newInstance(groupId, contacts);
+	// Fields that are accessed from background threads must be volatile
+	@Inject
+	protected volatile ForumSharingManager forumSharingManager;
+
+	@Override
+	BaseMessageFragment getMessageFragment() {
+		return ShareForumMessageFragment.newInstance();
 	}
 
 	@Override
@@ -25,10 +26,20 @@ public class ShareForumActivity extends ShareActivity {
 		component.inject(this);
 	}
 
-	/**
-	 * This must only be called from a DbThread
-	 */
+	@Override
 	public boolean isDisabled(GroupId groupId, Contact c) throws DbException {
 		return !forumSharingManager.canBeShared(groupId, c);
 	}
+
+	@Override
+	protected void share(GroupId g, ContactId c, String msg)
+			throws DbException {
+		forumSharingManager.sendInvitation(g, c, msg);
+	}
+
+	@Override
+	protected int getSharingError() {
+		return R.string.forum_share_error;
+	}
+
 }

briar-android/src/org/briarproject/android/sharing/ShareForumMessageFragment.java

@@ -4,38 +4,16 @@ import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Toast;
 
 import org.briarproject.R;
 import org.briarproject.android.ActivityComponent;
-import org.briarproject.api.contact.ContactId;
-import org.briarproject.api.db.DbException;
-import org.briarproject.api.forum.ForumSharingManager;
-import org.briarproject.api.sync.GroupId;
 
-import java.util.Collection;
-import java.util.logging.Logger;
-
-import javax.inject.Inject;
-
-import static android.widget.Toast.LENGTH_SHORT;
-import static java.util.logging.Level.WARNING;
-
-public class ShareForumMessageFragment extends ShareMessageFragment {
+public class ShareForumMessageFragment extends BaseMessageFragment {
 
 	public final static String TAG = ShareForumMessageFragment.class.getName();
-	private static final Logger LOG = Logger.getLogger(TAG);
 
-	// Fields that are accessed from background threads must be volatile
-	@Inject
-	protected volatile ForumSharingManager forumSharingManager;
-
-	public static ShareForumMessageFragment newInstance(GroupId groupId,
-			Collection<ContactId> contacts) {
-
-		ShareForumMessageFragment fragment = new ShareForumMessageFragment();
-		fragment.setArguments(getArguments(groupId, contacts));
-		return fragment;
+	public static ShareForumMessageFragment newInstance() {
+		return new ShareForumMessageFragment();
 	}
 
 	@Override
@@ -46,6 +24,16 @@ public class ShareForumMessageFragment extends ShareMessageFragment {
 		return super.onCreateView(inflater, container, savedInstanceState);
 	}
 
+	@Override
+	protected int getButtonText() {
+		return R.string.forum_share_button;
+	}
+
+	@Override
+	protected int getHintText() {
+		return R.string.forum_share_message;
+	}
+
 	@Override
 	public void injectFragment(ActivityComponent component) {
 		component.inject(this);
@@ -56,33 +44,4 @@ public class ShareForumMessageFragment extends ShareMessageFragment {
 		return TAG;
 	}
 
-	@Override
-	protected void share(final String msg) {
-		listener.runOnDbThread(new Runnable() {
-			@Override
-			public void run() {
-				try {
-					for (ContactId c : getContacts()) {
-						forumSharingManager.
-								sendInvitation(getGroupId(), c, msg);
-					}
-				} catch (DbException e) {
-					sharingError();
-					if (LOG.isLoggable(WARNING))
-						LOG.log(WARNING, e.toString(), e);
-				}
-			}
-		});
-	}
-
-	@Override
-	protected void sharingError() {
-		listener.runOnUiThreadUnlessDestroyed(new Runnable() {
-			@Override
-			public void run() {
-				int res = R.string.forum_share_error;
-				Toast.makeText(getContext(), res, LENGTH_SHORT).show();
-			}
-		});
-	}
 }

briar-android/src/org/briarproject/android/sharing/ShareMessageFragment.java

@@ -1,135 +0,0 @@
-package org.briarproject.android.sharing;
-
-import android.content.Context;
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
-
-import org.briarproject.R;
-import org.briarproject.android.fragment.BaseFragment;
-import org.briarproject.android.view.LargeTextInputView;
-import org.briarproject.android.view.TextInputView.TextInputListener;
-import org.briarproject.api.blogs.BlogSharingManager;
-import org.briarproject.api.contact.ContactId;
-import org.briarproject.api.forum.ForumSharingManager;
-import org.briarproject.api.sync.GroupId;
-import org.briarproject.util.StringUtils;
-
-import java.util.ArrayList;
-import java.util.Collection;
-
-import javax.inject.Inject;
-
-import static org.briarproject.android.sharing.ShareActivity.CONTACTS;
-import static org.briarproject.android.sharing.ShareActivity.getContactsFromIds;
-import static org.briarproject.api.sharing.SharingConstants.GROUP_ID;
-import static org.briarproject.api.sharing.SharingConstants.MAX_INVITATION_MESSAGE_LENGTH;
-
-abstract class ShareMessageFragment extends BaseFragment
-		implements TextInputListener {
-
-	protected ViewHolder ui;
-	private ShareActivity shareActivity;
-
-	// Fields that are accessed from background threads must be volatile
-	@Inject
-	protected volatile ForumSharingManager forumSharingManager;
-	@Inject
-	protected volatile BlogSharingManager blogSharingManager;
-	private volatile GroupId groupId;
-	private volatile Collection<ContactId> contacts;
-
-	protected static Bundle getArguments(GroupId groupId,
-			Collection<ContactId> contacts) {
-
-		Bundle args = new Bundle();
-		args.putByteArray(GROUP_ID, groupId.getBytes());
-		args.putIntegerArrayList(CONTACTS, getContactsFromIds(contacts));
-		return args;
-	}
-
-	@Override
-	public void onAttach(Context context) {
-		super.onAttach(context);
-		shareActivity = (ShareActivity) context;
-	}
-
-	@Override
-	public View onCreateView(LayoutInflater inflater, ViewGroup container,
-			Bundle savedInstanceState) {
-
-		// allow for "up" button to act as back button
-		setHasOptionsMenu(true);
-
-		// get groupID and contactIDs from fragment arguments
-		groupId = new GroupId(getArguments().getByteArray(GROUP_ID));
-		ArrayList<Integer> intContacts =
-				getArguments().getIntegerArrayList(CONTACTS);
-		if (intContacts == null) throw new IllegalArgumentException();
-		contacts = ShareActivity.getContactsFromIntegers(intContacts);
-
-		// inflate view
-		View v = inflater.inflate(R.layout.fragment_share_message, container,
-				false);
-		ui = new ViewHolder(v);
-		ui.message.setListener(this);
-
-		return v;
-	}
-
-	@Override
-	public void onStart() {
-		super.onStart();
-		ui.message.showSoftKeyboard();
-	}
-
-	@Override
-	public boolean onOptionsItemSelected(final MenuItem item) {
-		switch (item.getItemId()) {
-			case android.R.id.home:
-				shareActivity.onBackPressed();
-				return true;
-			default:
-				return super.onOptionsItemSelected(item);
-		}
-	}
-
-	protected void setTitle(int res) {
-		shareActivity.setTitle(res);
-	}
-
-	@Override
-	public void onSendClick(String msg) {
-		// disable button to prevent accidental double invitations
-		ui.message.setSendButtonEnabled(false);
-
-		msg = StringUtils.truncateUtf8(msg, MAX_INVITATION_MESSAGE_LENGTH);
-		share(msg);
-
-		// don't wait for the invitation to be made before finishing activity
-		shareActivity.sharingSuccessful(ui.message);
-	}
-
-	abstract void share(final String msg);
-
-	abstract void sharingError();
-
-	protected Collection<ContactId> getContacts() {
-		return contacts;
-	}
-
-	protected GroupId getGroupId() {
-		return groupId;
-	}
-
-	protected static class ViewHolder {
-		protected final LargeTextInputView message;
-
-		private ViewHolder(View v) {
-			message = (LargeTextInputView) v
-					.findViewById(R.id.invitationMessageView);
-		}
-	}
-}