Merge branch 'incorporate-mockup-fragments' into 'social-backup-poc'

Incorporate mockup fragments

See merge request briar/briar!1395

briar-android/src/main/AndroidManifest.xml

@@ -134,6 +134,25 @@
 			</intent-filter>
 		</activity>
 
+		<activity
+			android:name="org.briarproject.briar.android.socialbackup.DistributedBackupActivity"
+			android:label="@string/activity_name_distributed_backup"
+			android:parentActivityName="org.briarproject.briar.android.settings.SettingsActivity">
+			<meta-data
+				android:name="android.support.PARENT_ACTIVITY"
+				android:value="org.briarproject.briar.android.settings.SettingsActivity" />
+		</activity>
+
+		<activity
+			android:name="org.briarproject.briar.android.socialbackup.OldDistributedBackupActivity"
+			android:label="@string/activity_name_old_distributed_backup"
+			android:parentActivityName="org.briarproject.briar.android.settings.SettingsActivity">
+			<meta-data
+				android:name="android.support.PARENT_ACTIVITY"
+				android:value="org.briarproject.briar.android.settings.SettingsActivity" />
+		</activity>
+
+
 		<activity
 			android:name="org.briarproject.briar.android.conversation.ConversationActivity"
 			android:label="@string/app_name"

briar-android/src/main/java/org/briarproject/briar/android/AndroidComponent.java

@@ -13,6 +13,7 @@ import org.briarproject.bramble.api.contact.ContactExchangeManager;
 import org.briarproject.bramble.api.contact.ContactManager;
 import org.briarproject.bramble.api.crypto.CryptoExecutor;
 import org.briarproject.bramble.api.crypto.PasswordStrengthEstimator;
+import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.db.TransactionManager;
 import org.briarproject.bramble.api.event.EventBus;
@@ -59,7 +60,9 @@ import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
 import org.briarproject.briar.api.privategroup.PrivateGroupManager;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationFactory;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
+import org.briarproject.briar.api.socialbackup.SocialBackupManager;
 import org.briarproject.briar.api.test.TestDataCreator;
+import org.briarproject.briar.socialbackup.SocialBackupManagerImpl_Factory;
 
 import java.util.concurrent.Executor;
 
@@ -184,6 +187,9 @@ public interface AndroidComponent
 
 	Thread.UncaughtExceptionHandler exceptionHandler();
 
+	SocialBackupManager socialBackupManager();
+    DatabaseComponent databaseComponent();
+
 	void inject(SignInReminderReceiver briarService);
 
 	void inject(BriarService briarService);

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

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.activity;
 
 import android.app.Activity;
 
+import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.briar.android.AndroidComponent;
 import org.briarproject.briar.android.StartupFailureActivity;
 import org.briarproject.briar.android.account.AuthorNameFragment;
@@ -77,20 +78,29 @@ import org.briarproject.briar.android.sharing.ShareBlogFragment;
 import org.briarproject.briar.android.sharing.ShareForumActivity;
 import org.briarproject.briar.android.sharing.ShareForumFragment;
 import org.briarproject.briar.android.sharing.SharingModule;
+//import org.briarproject.briar.android.socialbackup.CustodianDisplayFragment;
+import org.briarproject.briar.android.socialbackup.CustodianSelectorFragment;
+import org.briarproject.briar.android.socialbackup.DistributedBackupActivity;
+import org.briarproject.briar.android.socialbackup.OldDistributedBackupActivity;
+import org.briarproject.briar.android.socialbackup.ShardsSentFragment;
+import org.briarproject.briar.android.socialbackup.ThresholdSelectorFragment;
+import org.briarproject.briar.android.socialbackup.creation.CreateBackupController;
+import org.briarproject.briar.android.socialbackup.creation.CreateBackupModule;
 import org.briarproject.briar.android.splash.SplashScreenActivity;
 import org.briarproject.briar.android.test.TestDataActivity;
 
 import dagger.Component;
 
 @ActivityScope
-@Component(modules = {
+@Component(modules ={
 		ActivityModule.class,
 		BlogModule.class,
 		CreateGroupModule.class,
 		GroupInvitationModule.class,
 		GroupMemberModule.class,
 		GroupRevealModule.class,
-		SharingModule.SharingLegacyModule.class
+		SharingModule.SharingLegacyModule.class,
+		CreateBackupModule.class
 }, dependencies = AndroidComponent.class)
 public interface ActivityComponent {
 
@@ -238,4 +248,17 @@ public interface ActivityComponent {
 
 	void inject(ConfirmAvatarDialogFragment fragment);
 
+	void inject(ThresholdSelectorFragment thresholdSelectorFragment);
+
+	void inject(DistributedBackupActivity distributedBackupActivity);
+//    void inject(CreateBackupController createBackupController);
+//	void inject(CustodianDisplayFragment custodianDisplayFragment);
+
+	void inject(DatabaseComponent databaseComponent);
+
+	void inject(CustodianSelectorFragment custodianSelectorFragment);
+
+	void inject(ShardsSentFragment shardsSentFragment);
+
+	void inject(OldDistributedBackupActivity oldDistributedBackupActivity);
 }

briar-android/src/main/java/org/briarproject/briar/android/contactselection/BaseContactSelectorFragment.java

@@ -56,8 +56,11 @@ public abstract class BaseContactSelectorFragment<I extends SelectableContactIte
 
 		Bundle args = requireArguments();
 		byte[] b = args.getByteArray(GROUP_ID);
-		if (b == null) throw new IllegalStateException("No GroupId");
+//		if (b == null) throw new IllegalStateException("No GroupId");
-		groupId = new GroupId(b);
+		// TODO find what the groupId should be when selecting custodians
+		if (b != null) {
+			groupId = new GroupId(b);
+		}
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/contactselection/ContactSelectorFragment.java

@@ -18,7 +18,7 @@ public abstract class ContactSelectorFragment extends
 
 	public static final String TAG = ContactSelectorFragment.class.getName();
 
-	private Menu menu;
+	protected Menu menu;
 
 	@Override
 	protected ContactSelectorAdapter getAdapter(Context context,

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/CustodianSelectorFragment.java

@@ -0,0 +1,93 @@
+package org.briarproject.briar.android.socialbackup;
+
+import android.os.Bundle;
+import android.view.MenuItem;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.socialbackup.creation.CreateBackupController;
+import org.briarproject.briar.android.contactselection.BaseContactSelectorAdapter;
+import org.briarproject.briar.android.contactselection.ContactSelectorController;
+import org.briarproject.briar.android.contactselection.ContactSelectorFragment;
+import org.briarproject.briar.android.contactselection.SelectableContactItem;
+import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
+
+import java.util.Collection;
+
+import javax.inject.Inject;
+
+import androidx.annotation.Nullable;
+
+import static java.util.Objects.requireNonNull;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class CustodianSelectorFragment extends ContactSelectorFragment {
+
+	public static final String TAG = CustodianSelectorFragment.class.getName();
+
+	@Inject
+	CreateBackupController controller;
+
+	public static CustodianSelectorFragment newInstance() {
+		Bundle args = new Bundle();
+
+		CustodianSelectorFragment fragment = new CustodianSelectorFragment();
+		fragment.setArguments(args);
+
+		return fragment;
+	}
+
+	@Override
+	public void injectFragment(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		requireActivity().setTitle(R.string.title_select_custodians);
+	}
+
+	@Override
+	protected ContactSelectorController<SelectableContactItem> getController() {
+		return controller;
+	}
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	protected void onSelectionChanged() {
+		super.onSelectionChanged();
+		if (menu == null) return;
+		MenuItem item = menu.findItem(R.id.action_contacts_selected);
+		if (item == null) return;
+
+		BaseContactSelectorAdapter a = adapter;
+		selectedContacts = a.getSelectedContactIds();
+
+		int n = selectedContacts.size();
+		int min = 2;
+		boolean enough = n >= min;
+
+		item.setVisible(enough);
+		if (n == 0) {
+			Toast.makeText(getContext(), String.format(getString(R.string.select_at_least_n_contacts), min),
+					Toast.LENGTH_SHORT).show();
+		} else if (n < min) {
+			Toast.makeText(getContext(), String.format(getString(R.string.select_at_least_n_more_contacts), min - n),
+					Toast.LENGTH_SHORT).show();
+		}
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/DistributedBackupActivity.java

@@ -0,0 +1,77 @@
+package org.briarproject.briar.android.socialbackup;
+
+import android.os.Bundle;
+import android.widget.Toast;
+
+import androidx.fragment.app.FragmentTransaction;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.db.DatabaseComponent;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+import org.briarproject.briar.android.contactselection.ContactSelectorListener;
+import org.briarproject.briar.android.fragment.BaseFragment;
+import org.briarproject.briar.api.socialbackup.SocialBackupManager;
+
+import java.util.Collection;
+import java.util.List;
+
+import javax.inject.Inject;
+
+public class DistributedBackupActivity extends BriarActivity implements
+		BaseFragment.BaseFragmentListener, ContactSelectorListener,
+		ThresholdDefinedListener, ShardsSentDismissedListener {
+
+	private Collection<ContactId> custodians;
+
+	@Inject
+    public SocialBackupManager socialBackupManager;
+
+	@Inject
+    public DatabaseComponent db;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_distributed_backup);
+        // TODO here we should check if we already have a backup
+		// BackupMetadata backupMetadata = socialBackupManager.getBackupMetadata();
+		// if (backupMetadata == null) {
+		CustodianSelectorFragment fragment =
+				CustodianSelectorFragment.newInstance();
+        // } else {
+		//   display the backup metadata
+		showInitialFragment(fragment);
+	}
+
+	@Override
+	public void contactsSelected(Collection<ContactId> contacts) {
+		Toast.makeText(this,
+				String.format("selected %d contacts", contacts.size()),
+				Toast.LENGTH_SHORT).show();
+		custodians = contacts;
+		ThresholdSelectorFragment fragment = ThresholdSelectorFragment.newInstance(contacts.size());
+		showNextFragment(fragment);
+	}
+
+	@Override
+	public void thresholdDefined(int threshold) throws DbException {
+		db.transaction(false, txn -> {
+			socialBackupManager.createBackup(txn, (List<ContactId>) custodians, threshold);
+			ShardsSentFragment fragment = new ShardsSentFragment();
+			showNextFragment(fragment);
+		});
+	}
+
+	@Override
+	public void shardsSentDismissed() {
+		finish();
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/OldDistributedBackupActivity.java

@@ -0,0 +1,39 @@
+package org.briarproject.briar.android.socialbackup;
+
+import android.os.Bundle;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+import org.briarproject.briar.android.contactselection.ContactSelectorListener;
+import org.briarproject.briar.android.fragment.BaseFragment;
+
+import java.util.Collection;
+
+public class OldDistributedBackupActivity extends BriarActivity
+		implements BaseFragment.BaseFragmentListener, ContactSelectorListener {
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_distributed_backup);
+
+//		CustodianDisplayFragment fragment =
+//				CustodianDisplayFragment.newInstance();
+//
+//		showInitialFragment(fragment);
+	}
+
+	@Override
+	public void contactsSelected(Collection<ContactId> contacts) {
+		// do nothing
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/ShardsSentDismissedListener.java

@@ -0,0 +1,10 @@
+package org.briarproject.briar.android.socialbackup;
+
+import androidx.annotation.UiThread;
+
+public interface ShardsSentDismissedListener {
+
+	@UiThread
+	void shardsSentDismissed();
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/ShardsSentFragment.java

@@ -0,0 +1,65 @@
+package org.briarproject.briar.android.socialbackup;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.fragment.BaseFragment;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import static java.util.Objects.requireNonNull;
+
+public class ShardsSentFragment extends BaseFragment {
+
+    public static final String TAG = ShardsSentFragment.class.getName();
+
+    protected ShardsSentDismissedListener listener;
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        requireActivity().setTitle(R.string.title_distributed_backup);
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_shards_sent,
+                container, false);
+
+        Button button = view.findViewById(R.id.button);
+        button.setOnClickListener(e -> {
+            listener.shardsSentDismissed();
+        });
+
+        return view;
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        listener = (ShardsSentDismissedListener) context;
+    }
+
+
+    @Override
+    public String getUniqueTag() {
+        return TAG;
+    }
+
+    @Override
+    public void injectFragment(ActivityComponent component) {
+        component.inject(this);
+    }
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/ThresholdDefinedListener.java

@@ -0,0 +1,12 @@
+package org.briarproject.briar.android.socialbackup;
+
+import org.briarproject.bramble.api.db.DbException;
+
+import androidx.annotation.UiThread;
+
+public interface ThresholdDefinedListener {
+
+	@UiThread
+	void thresholdDefined(int threshold) throws DbException;
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/ThresholdSelectorFragment.java

@@ -0,0 +1,169 @@
+package org.briarproject.briar.android.socialbackup;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.SeekBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.contactselection.ContactSelectorListener;
+import org.briarproject.briar.android.fragment.BaseFragment;
+import org.magmacollective.darkcrystal.secretsharingwrapper.SecretSharingWrapper;
+
+import static java.util.Objects.requireNonNull;
+
+public class ThresholdSelectorFragment extends BaseFragment {
+
+    public static final String TAG = ThresholdSelectorFragment.class.getName();
+    private static final String NUMBER_CUSTODIANS = "numberCustodians";
+
+    protected ThresholdDefinedListener listener;
+
+    // TODO this should be the actual number of custodians
+    private int numberOfCustodians;
+    private int threshold;
+    private int recommendedThreshold;
+    private SeekBar seekBar;
+    private TextView thresholdRepresentation;
+    private TextView message;
+    private TextView mOfn;
+
+    public static ThresholdSelectorFragment newInstance(int numberCustodians) {
+        Bundle bundle = new Bundle();
+        bundle.putInt(NUMBER_CUSTODIANS, numberCustodians);
+        ThresholdSelectorFragment fragment = new ThresholdSelectorFragment();
+        fragment.setArguments(bundle);
+        return fragment;
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        requireActivity().setTitle(R.string.title_define_threshold);
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_select_threshold,
+                container, false);
+	    Bundle args = requireArguments();
+	    numberOfCustodians = args.getInt(NUMBER_CUSTODIANS);
+
+        seekBar = view.findViewById(R.id.seekBar);
+        thresholdRepresentation = view.findViewById(R.id.textViewThresholdRepresentation);
+        message = view.findViewById(R.id.textViewMessage);
+        mOfn = view.findViewById(R.id.textViewmOfn);
+        int max = numberOfCustodians - 3;
+        seekBar.setMax(max);
+        seekBar.setOnSeekBarChangeListener(new SeekBarListener());
+        recommendedThreshold = SecretSharingWrapper.defaultThreshold(numberOfCustodians);
+        threshold = recommendedThreshold;
+        seekBar.setProgress(threshold - 2);
+
+        thresholdRepresentation.setText(buildThresholdRepresentationString());
+        setmOfnText();
+        return view;
+//        return super.onCreateView(inflater, container, savedInstanceState);
+    }
+
+    private void setmOfnText() {
+        mOfn.setText(String.format("%d of %d contacts needed to recover your account", threshold, numberOfCustodians));
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        listener = (ThresholdDefinedListener) context;
+    }
+
+
+    @Override
+    public String getUniqueTag() {
+        return TAG;
+    }
+
+    @Override
+    public void injectFragment(ActivityComponent component) {
+        component.inject(this);
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        inflater.inflate(R.menu.define_threshold_actions, menu);
+        super.onCreateOptionsMenu(menu, inflater);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_threshold_defined:
+                try {
+                    listener.thresholdDefined(threshold);
+                } catch (DbException e) {
+                    e.printStackTrace();
+                }
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private String buildThresholdRepresentationString () {
+        String thresholdRepresentationText = "";
+        for (int i = 0; i < threshold; i++) {
+            thresholdRepresentationText += getString(R.string.filled_bullet);
+        }
+        for (int i = 0; i < (numberOfCustodians - threshold); i++) {
+            thresholdRepresentationText += getString(R.string.linear_bullet);
+        }
+        return thresholdRepresentationText;
+    }
+
+    private class SeekBarListener implements SeekBar.OnSeekBarChangeListener {
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress,
+                boolean fromUser) {
+	        threshold = progress + 2;
+
+            thresholdRepresentation.setText(
+                    buildThresholdRepresentationString()
+            );
+            setmOfnText();
+
+            int sanityLevel = SecretSharingWrapper.thresholdSanity(threshold, numberOfCustodians);
+            int text = R.string.threshold_secure;
+            if (threshold == recommendedThreshold) text = R.string.threshold_recommended;
+            if (sanityLevel < -1) text = R.string.threshold_low_insecure;
+            if (sanityLevel > 0) text = R.string.threshold_high_insecure;
+            message.setText(text);
+            // TODO change colour of thresholdRepresentation to green/red based on sanityLevel
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {
+            // do nothing
+        }
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {
+            // do nothing
+        }
+
+    }
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/creation/CreateBackupController.java

@@ -0,0 +1,26 @@
+package org.briarproject.briar.android.socialbackup.creation;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.briar.android.contactselection.ContactSelectorController;
+import org.briarproject.briar.android.contactselection.SelectableContactItem;
+import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
+
+import java.util.Collection;
+
+import androidx.annotation.Nullable;
+
+@NotNullByDefault
+public interface CreateBackupController
+		extends ContactSelectorController<SelectableContactItem> {
+
+	void createGroup(String name,
+			ResultExceptionHandler<GroupId, DbException> result);
+
+	void sendInvitation(GroupId g, Collection<ContactId> contacts,
+			@Nullable String text,
+			ResultExceptionHandler<Void, DbException> result);
+
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/creation/CreateBackupControllerImpl.java

@@ -0,0 +1,206 @@
+package org.briarproject.briar.android.socialbackup.creation;
+
+import org.briarproject.bramble.api.contact.Contact;
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.contact.ContactManager;
+import org.briarproject.bramble.api.crypto.CryptoExecutor;
+import org.briarproject.bramble.api.db.DatabaseExecutor;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.NoSuchContactException;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.briar.android.contactselection.ContactSelectorControllerImpl;
+import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
+import org.briarproject.briar.api.identity.AuthorManager;
+import org.briarproject.briar.api.privategroup.GroupMessage;
+import org.briarproject.briar.api.privategroup.GroupMessageFactory;
+import org.briarproject.briar.api.privategroup.PrivateGroup;
+import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
+import org.briarproject.briar.api.privategroup.PrivateGroupManager;
+import org.briarproject.briar.api.privategroup.invitation.GroupInvitationFactory;
+import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import javax.annotation.concurrent.Immutable;
+import javax.inject.Inject;
+
+import androidx.annotation.Nullable;
+
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@Immutable
+@NotNullByDefault
+/**
+ * Derived from {@link org.briarproject.briar.android.privategroup.invitation.GroupInvitationControllerImpl}
+ */
+class CreateBackupControllerImpl extends ContactSelectorControllerImpl
+		implements CreateBackupController {
+
+	private static final Logger LOG =
+			Logger.getLogger(
+					CreateBackupControllerImpl.class.getName());
+
+	private final Executor cryptoExecutor;
+	private final ContactManager contactManager;
+	private final IdentityManager identityManager;
+	private final PrivateGroupFactory groupFactory;
+	private final GroupMessageFactory groupMessageFactory;
+	private final PrivateGroupManager groupManager;
+	private final GroupInvitationFactory groupInvitationFactory;
+	private final GroupInvitationManager groupInvitationManager;
+	private final Clock clock;
+
+	@Inject
+	CreateBackupControllerImpl(@DatabaseExecutor Executor dbExecutor,
+			@CryptoExecutor Executor cryptoExecutor,
+			LifecycleManager lifecycleManager, ContactManager contactManager,
+			IdentityManager identityManager, PrivateGroupFactory groupFactory,
+			GroupMessageFactory groupMessageFactory,
+			PrivateGroupManager groupManager,
+			GroupInvitationFactory groupInvitationFactory,
+			GroupInvitationManager groupInvitationManager, Clock clock, AuthorManager authorManager) {
+		super(dbExecutor, lifecycleManager, contactManager, authorManager);
+		this.cryptoExecutor = cryptoExecutor;
+		this.contactManager = contactManager;
+		this.identityManager = identityManager;
+		this.groupFactory = groupFactory;
+		this.groupMessageFactory = groupMessageFactory;
+		this.groupManager = groupManager;
+		this.groupInvitationFactory = groupInvitationFactory;
+		this.groupInvitationManager = groupInvitationManager;
+		this.clock = clock;
+	}
+
+	@Override
+	public void createGroup(String name,
+			ResultExceptionHandler<GroupId, DbException> handler) {
+		runOnDbThread(() -> {
+			try {
+				LocalAuthor author = identityManager.getLocalAuthor();
+				createGroupAndMessages(author, name, handler);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				handler.onException(e);
+			}
+		});
+	}
+
+	private void createGroupAndMessages(LocalAuthor author, String name,
+			ResultExceptionHandler<GroupId, DbException> handler) {
+		cryptoExecutor.execute(() -> {
+			LOG.info("Creating group...");
+			PrivateGroup group =
+					groupFactory.createPrivateGroup(name, author);
+			LOG.info("Creating new join announcement...");
+			GroupMessage joinMsg =
+					groupMessageFactory.createJoinMessage(group.getId(),
+							clock.currentTimeMillis(), author);
+			storeGroup(group, joinMsg, handler);
+		});
+	}
+
+	private void storeGroup(PrivateGroup group, GroupMessage joinMsg,
+			ResultExceptionHandler<GroupId, DbException> handler) {
+		runOnDbThread(() -> {
+			LOG.info("Adding group to database...");
+			try {
+				groupManager.addPrivateGroup(group, joinMsg, true);
+				handler.onResult(group.getId());
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				handler.onException(e);
+			}
+		});
+	}
+
+	@Override
+	protected boolean isDisabled(GroupId g, Contact c) {
+		return false;
+	}
+
+	@Override
+	public void sendInvitation(GroupId g, Collection<ContactId> contactIds,
+			@Nullable String text,
+			ResultExceptionHandler<Void, DbException> handler) {
+		runOnDbThread(() -> {
+			try {
+				LocalAuthor localAuthor = identityManager.getLocalAuthor();
+				List<Contact> contacts = new ArrayList<>();
+				for (ContactId c : contactIds) {
+					try {
+						contacts.add(contactManager.getContact(c));
+					} catch (NoSuchContactException e) {
+						// Continue
+					}
+				}
+				signInvitations(g, localAuthor, contacts, text, handler);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				handler.onException(e);
+			}
+		});
+	}
+
+	private void signInvitations(GroupId g, LocalAuthor localAuthor,
+			Collection<Contact> contacts, @Nullable String text,
+			ResultExceptionHandler<Void, DbException> handler) {
+		cryptoExecutor.execute(() -> {
+			long timestamp = clock.currentTimeMillis();
+			List<InvitationContext> contexts = new ArrayList<>();
+			for (Contact c : contacts) {
+				byte[] signature = groupInvitationFactory.signInvitation(c, g,
+						timestamp, localAuthor.getPrivateKey());
+				contexts.add(new InvitationContext(c.getId(), timestamp,
+						signature));
+			}
+			sendInvitations(g, contexts, text, handler);
+		});
+	}
+
+	private void sendInvitations(GroupId g,
+			Collection<InvitationContext> contexts, @Nullable String text,
+			ResultExceptionHandler<Void, DbException> handler) {
+		runOnDbThread(() -> {
+			try {
+				for (InvitationContext context : contexts) {
+					try {
+						groupInvitationManager.sendInvitation(g,
+								context.contactId, text, context.timestamp,
+								context.signature);
+					} catch (NoSuchContactException e) {
+						// Continue
+					}
+				}
+				//noinspection ConstantConditions
+				handler.onResult(null);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				handler.onException(e);
+			}
+		});
+	}
+
+	private static class InvitationContext {
+
+		private final ContactId contactId;
+		private final long timestamp;
+		private final byte[] signature;
+
+		private InvitationContext(ContactId contactId, long timestamp,
+				byte[] signature) {
+			this.contactId = contactId;
+			this.timestamp = timestamp;
+			this.signature = signature;
+		}
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/socialbackup/creation/CreateBackupModule.java

@@ -0,0 +1,18 @@
+package org.briarproject.briar.android.socialbackup.creation;
+
+import org.briarproject.briar.android.activity.ActivityScope;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class CreateBackupModule {
+
+	@ActivityScope
+	@Provides
+	CreateBackupController provideCreateGroupController(
+			CreateBackupControllerImpl createBackupController) {
+		return createBackupController;
+	}
+
+}

briar-android/src/main/res/drawable/ic_baseline_done_outline_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#29C400"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19.77,5.03l1.4,1.4L8.43,19.17l-5.6,-5.6 1.4,-1.4 4.2,4.2L19.77,5.03m0,-2.83L8.43,13.54l-4.2,-4.2L0,13.57 8.43,22 24,6.43 19.77,2.2z"/>
+</vector>

briar-android/src/main/res/drawable/ic_pie_2_of_3.xml

@@ -0,0 +1,39 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="223.98288dp"
+    android:height="224.54811dp"
+    android:viewportWidth="223.98288"
+    android:viewportHeight="224.54811">
+  <path
+      android:pathData="m217.071,117.837a100,100 0,0 1,-50 86.603,100 100,0 0,1 -100,0l50,-86.603z"
+      android:strokeAlpha="0.967625"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"
+      android:fillAlpha="0.967625"/>
+  <path
+      android:pathData="M61.997,200.214A100,100 0,0 1,11.997 113.611,100 100,0 0,1 61.997,27.009l50,86.602z"
+      android:strokeAlpha="0.967625"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"
+      android:fillAlpha="0.967625"/>
+  <path
+      android:pathData="m67.272,24.388a100,100 0,0 1,100 -0,100 100,0 0,1 50,86.602l-100,0z"
+      android:strokeAlpha="0.967625"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"
+      android:fillAlpha="0.967625"/>
+  <path
+      android:pathData="m206.574,108.346a100,100 0,0 1,-50 86.603,100 100,0 0,1 -100,0l50,-86.603z"
+      android:strokeWidth="3"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M51.5,190.723A100,100 0,0 1,1.5 104.12,100 100,0 0,1 51.5,17.518l50,86.602z"
+      android:strokeWidth="3"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="m56.775,14.897a100,100 0,0 1,100 -0,100 100,0 0,1 50,86.602l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+</vector>

briar-android/src/main/res/drawable/ic_pie_2_of_5.xml

@@ -0,0 +1,56 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="227.09961dp"
+    android:height="229.26584dp"
+    android:viewportWidth="227.09961"
+    android:viewportHeight="229.26584">
+  <path
+      android:pathData="m221.061,121.69a100,100 0,0 1,-69.098 95.106L121.061,121.69Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M145.01,218.923A100,100 0,0 1,33.207 182.596l80.902,-58.779z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M27.939,175.395A100,100 0,0 1,27.939 57.838L108.841,116.616Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M32.639,50.913A100,100 0,0 1,144.442 14.586L113.54,109.691Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m152.553,17.698a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m213.717,113.504a100,100 0,0 1,-69.098 95.106l-30.902,-95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M137.667,210.738A100,100 0,0 1,25.863 174.411L106.765,115.632Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M20.596,167.209A100,100 0,0 1,20.596 49.652L101.497,108.431Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M25.295,42.727A100,100 0,0 1,137.098 6.4l-30.902,95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="m145.21,9.512a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+</vector>

briar-android/src/main/res/drawable/ic_pie_3_of_5.xml

@@ -0,0 +1,56 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="227.09961dp"
+    android:height="229.26584dp"
+    android:viewportWidth="227.09961"
+    android:viewportHeight="229.26584">
+  <path
+      android:pathData="m221.061,121.69a100,100 0,0 1,-69.098 95.106L121.061,121.69Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M145.01,218.923A100,100 0,0 1,33.207 182.596l80.902,-58.779z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M27.939,175.395A100,100 0,0 1,27.939 57.838L108.841,116.616Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M32.639,50.913A100,100 0,0 1,144.442 14.586L113.54,109.691Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m152.553,17.698a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m213.717,113.504a100,100 0,0 1,-69.098 95.106l-30.902,-95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M137.667,210.738A100,100 0,0 1,25.863 174.411L106.765,115.632Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M20.596,167.209A100,100 0,0 1,20.596 49.652L101.497,108.431Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M25.295,42.727A100,100 0,0 1,137.098 6.4l-30.902,95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="m145.21,9.512a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+</vector>

briar-android/src/main/res/drawable/ic_pie_4_of_5.xml

@@ -0,0 +1,56 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="227.09961dp"
+    android:height="229.26584dp"
+    android:viewportWidth="227.09961"
+    android:viewportHeight="229.26584">
+  <path
+      android:pathData="m221.061,121.69a100,100 0,0 1,-69.098 95.106L121.061,121.69Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M145.01,218.923A100,100 0,0 1,33.207 182.596l80.902,-58.779z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M27.939,175.395A100,100 0,0 1,27.939 57.838L108.841,116.616Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M32.639,50.913A100,100 0,0 1,144.442 14.586L113.54,109.691Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m152.553,17.698a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#b3b3b3"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m213.717,113.504a100,100 0,0 1,-69.098 95.106l-30.902,-95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M137.667,210.738A100,100 0,0 1,25.863 174.411L106.765,115.632Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#800080"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M20.596,167.209A100,100 0,0 1,20.596 49.652L101.497,108.431Z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="M25.295,42.727A100,100 0,0 1,137.098 6.4l-30.902,95.106z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+  <path
+      android:pathData="m145.21,9.512a100,100 0,0 1,69.098 95.106l-100,0z"
+      android:strokeWidth="3.00011"
+      android:fillColor="#ff00ff"
+      android:strokeColor="#000000"/>
+</vector>

briar-android/src/main/res/layout/activity_distributed_backup.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragmentContainer"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/activity_preview_recovery_custodian1.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_help_recover"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_custodian_explainer" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_recovery_custodian2.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_help_recover"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_custodian_error_explainer" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_recovery_owner1.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_recovery_mode"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_owner_explainer" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_recovery_owner2.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_recovery_mode"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_owner_error_explainer" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_recovery_owner3.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_recovery_mode"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_owner_main" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_recovery_owner4.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/title_recovery_mode"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_recovery_owner_recovering" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_preview_welcome.xml

@@ -0,0 +1,21 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/setup_title"
+		app:titleTextColor="@android:color/white" />
+
+	<include layout="@layout/fragment_start" />
+
+</LinearLayout>

briar-android/src/main/res/layout/activity_welcome.xml

@@ -0,0 +1,19 @@
+<?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:fitsSystemWindows="true"
+	android:orientation="vertical">
+
+	<androidx.appcompat.widget.Toolbar
+		android:id="@+id/toolbar"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="?attr/colorPrimary"
+		android:minHeight="?attr/actionBarSize"
+		app:title="@string/setup_title"
+		app:titleTextColor="@android:color/white" />
+
+</LinearLayout>

briar-android/src/main/res/layout/fragment_account_recovered.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/margin_large"
+    android:paddingTop="@dimen/margin_medium"
+    android:paddingRight="@dimen/margin_large"
+    android:paddingBottom="@dimen/margin_medium">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:text="@string/backup_done_dismiss"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView2" />
+
+    <TextView
+        android:id="@+id/textView2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:gravity="center"
+        android:text="@string/recovery_account_recovered"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginStart="32dp"
+        android:layout_marginLeft="32dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        app:layout_constraintDimensionRatio="1:1"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/ic_baseline_done_outline_24" />
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_mockups.xml

@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<LinearLayout
+		android:id="@+id/linearLayout"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		android:orientation="vertical"
+		android:paddingLeft="@dimen/margin_large"
+		android:paddingTop="@dimen/margin_medium"
+		android:paddingRight="@dimen/margin_large"
+		android:paddingBottom="@dimen/margin_medium">
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Backup creation" />
+
+		<Button
+			android:id="@+id/buttonSelectThreshold"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Select Threshold" />
+
+		<Button
+			android:id="@+id/buttonShardsSent"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Shards sent" />
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Setup" />
+
+		<Button
+			android:id="@+id/buttonWelcome"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Welcome" />
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Recovery from secrect owner's point of view" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryExplainer"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Explainer" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryReceivedShard"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Shard received" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryMain1"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Main (0 shards)" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryMain2"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Main (1 shard)" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryMain3"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Recovering account…" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryAccountRecovered"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Account recovered" />
+
+		<Button
+			android:id="@+id/buttonOwnerRecoveryErrorExplainer"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Error" />
+
+		<TextView
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="Recovery from custodian's point of view" />
+
+		<Button
+			android:id="@+id/buttonCustodianRecoveryExplainer"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Explainer" />
+
+		<Button
+			android:id="@+id/buttonCustodianRecoveryErrorExplainer"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Error" />
+
+		<Button
+			android:id="@+id/buttonCustodianRecoveryDone"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_security"
+			android:text="Done" />
+
+	</LinearLayout>
+</ScrollView>

briar-android/src/main/res/layout/fragment_recovery_custodian_done.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium">
+
+	<TextView
+		android:id="@+id/textView2"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="16dp"
+		android:gravity="center"
+		android:text="@string/custodian_shard_sent"
+		android:textSize="30sp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+
+	<ImageView
+		android:id="@+id/imageView2"
+		android:layout_width="match_parent"
+		android:layout_height="0dp"
+		android:layout_marginStart="32dp"
+		android:layout_marginLeft="32dp"
+		android:layout_marginTop="8dp"
+		android:layout_marginEnd="32dp"
+		android:layout_marginRight="32dp"
+		app:layout_constraintDimensionRatio="1:1"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/ic_baseline_done_outline_24" />
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_custodian_error_explainer.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_custodian2">
+
+	<TextView
+		android:id="@+id/textView1"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/custodian_recovery_failed_to_send"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<ImageView
+		android:id="@+id/imageView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView1"
+		app:srcCompat="@drawable/qr_code_error" />
+
+	<TextView
+		android:id="@+id/textView2"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_helpful_suggestions"
+		android:textSize="24sp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+	<Button
+		android:id="@+id/button"
+		android:layout_marginTop="24dp"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:text="@string/recovery_retry"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView2" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_custodian_explainer.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_custodian1">
+
+	<TextView
+		android:id="@+id/textView"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/custodian_recovery_explainer"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<ImageView
+		android:id="@+id/imageView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView"
+		app:srcCompat="@drawable/qr_code_intro" />
+
+	<Button
+		android:id="@+id/button"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:text="@string/custodian_scan_code"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_owner_error_explainer.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_owner2">
+
+	<TextView
+		android:id="@+id/textView1"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_failed_to_receive"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent" />
+
+	<ImageView
+		android:id="@+id/imageView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView1"
+		app:srcCompat="@drawable/qr_code_error" />
+
+	<TextView
+		android:id="@+id/textView2"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_helpful_suggestions"
+		android:textSize="24sp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+	<Button
+		android:id="@+id/button"
+		android:layout_marginTop="24dp"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:text="@string/recovery_retry"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView2" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_owner_explainer.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_owner1">
+
+	<TextView
+		android:id="@+id/textView"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_explainer"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<ImageView
+		android:id="@+id/imageView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView"
+		app:srcCompat="@drawable/qr_code_intro" />
+
+	<Button
+		android:id="@+id/button"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:text="@string/recovery_begin"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_owner_main.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_owner3">
+
+	<TextView
+		android:id="@+id/textView"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_recovered_shards"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<TextView
+		android:id="@+id/textViewShardCount"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="0"
+		android:textSize="24sp"
+		app:layout_constraintTop_toBottomOf="@+id/textView"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<Button
+		android:id="@+id/button"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:text="@string/recovery_scan_qr_code"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_recovery_owner_recovering.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:ignore="VectorDrawableCompat"
+	tools:showIn="@layout/activity_preview_recovery_owner4">
+
+	<TextView
+		android:id="@+id/textView"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_recovered_shards"
+		android:textSize="24sp"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<TextView
+		android:id="@+id/textViewShardCount"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="3"
+		android:textSize="24sp"
+		app:layout_constraintTop_toBottomOf="@+id/textView"
+		tools:layout_editor_absoluteX="16dp" />
+
+	<ProgressBar
+		android:id="@+id/progressBar"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_gravity="center"
+		android:layout_marginTop="144dp"
+		android:indeterminate="true"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textViewShardCount" />
+
+	<TextView
+		android:id="@+id/textView3"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="24dp"
+		android:gravity="center"
+		android:text="@string/recovery_recovering_account"
+		android:textSize="24sp"
+		app:layout_constraintTop_toBottomOf="@+id/progressBar" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_select_threshold.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/margin_large"
+    android:paddingTop="@dimen/margin_medium"
+    android:paddingRight="@dimen/margin_large"
+    android:paddingBottom="@dimen/margin_medium">
+
+    <TextView
+        android:id="@+id/title_threshold"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="@string/threshold"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <SeekBar
+        android:id="@+id/seekBar"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:max="5"
+        android:paddingTop="10dp"
+        android:progress="3"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/title_threshold" />
+
+
+    <TextView
+        android:id="@+id/textViewThresholdRepresentation"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="placeholder"
+        android:textSize="64dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/seekBar" />
+
+    <TextView
+        android:id="@+id/textViewmOfn"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="m of n contacts needed to recover your account"
+        android:textSize="16dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textViewThresholdRepresentation" />
+
+    <TextView
+        android:id="@+id/textViewMessage"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="@string/threshold_secure"
+        android:textSize="16dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textViewmOfn" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_shards_received.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/margin_large"
+    android:paddingTop="@dimen/margin_medium"
+    android:paddingRight="@dimen/margin_large"
+    android:paddingBottom="@dimen/margin_medium">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:text="@string/backup_done_dismiss"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView2" />
+
+    <TextView
+        android:id="@+id/textView2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:gravity="center"
+        android:text="@string/recovery_shard_received"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginStart="32dp"
+        android:layout_marginLeft="32dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        app:layout_constraintDimensionRatio="1:1"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/ic_baseline_done_outline_24" />
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_shards_sent.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/margin_large"
+    android:paddingTop="@dimen/margin_medium"
+    android:paddingRight="@dimen/margin_large"
+    android:paddingBottom="@dimen/margin_medium">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:text="@string/backup_done_dismiss"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView2" />
+
+    <TextView
+        android:id="@+id/textView2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/backup_done_info"
+        android:gravity="center"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginStart="32dp"
+        android:layout_marginLeft="32dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        app:layout_constraintDimensionRatio="1:1"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/ic_baseline_done_outline_24" />
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_start.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/linearLayout"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:paddingLeft="@dimen/margin_large"
+	android:paddingTop="@dimen/margin_medium"
+	android:paddingRight="@dimen/margin_large"
+	android:paddingBottom="@dimen/margin_medium"
+	tools:showIn="@layout/activity_preview_welcome">
+
+	<Button
+		android:id="@+id/buttonSelectThreshold"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:drawableLeft="@drawable/ic_contacts"
+		android:text="@string/setup_new_account"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent" />
+
+	<Button
+		android:id="@+id/buttonShardsSent"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:drawableLeft="@drawable/ic_repeat"
+		android:text="@string/setup_restore_account"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/buttonSelectThreshold" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/item_custodian.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <CheckBox
+        android:id="@+id/checkBox"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Bob"
+        tools:text="@sample/names.json/names/short_names/name" />
+
+</LinearLayout>

briar-android/src/main/res/menu/conversation_actions.xml

@@ -27,4 +27,9 @@
 		android:title="@string/delete_contact"
 		app:showAsAction="never"/>
 
+	<item
+		android:id="@+id/action_help_recover_account"
+		android:icon="@drawable/introduction_white"
+		android:title="@string/help_recover_account"
+		app:showAsAction="never"/>
 </menu>

briar-android/src/main/res/menu/define_threshold_actions.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto">
+
+	<item
+		android:id="@+id/action_threshold_defined"
+		android:icon="@drawable/ic_check_white"
+		android:title="@string/threshold_defined"
+		app:showAsAction="always"/>
+
+</menu>

briar-android/src/main/res/values/strings.xml

@@ -638,4 +638,78 @@
 	<!-- This is a message to be used in screenshots. -->
 	<string name="screenshot_message_3">No problem, hope you like it 😀</string>
 
+	<!-- social backup -->
+
+	<!-- settings -->
+
+	<string name="pref_distributed_backup_title">Social backup</string>
+	<string name="pref_distributed_backup_summary">Backup your account using trusted contacts</string>
+
+	<string name="pref_distributed_old_backup_title">Existing Social backup</string>
+	<string name="pref_distributed_old_backup_summary">Information about your most recent social backup</string>
+
+	<!-- social backup procedure -->
+
+	<string name="select_custodians">Select Trusted Contacts:</string>
+
+	<string name="select_at_least_n_contacts">Please select at least %d contacts</string>
+	<string name="select_at_least_n_more_contacts">Please select at least %d more contacts</string>
+
+	<string name="threshold">The minimum number of trusted contacts needed to restore your account:</string>
+	<string name="threshold_secure">Secure</string>
+	<string name="threshold_recommended">Secure - recommended threshold</string>
+	<string name="threshold_low_insecure">Insecure – higher threshold recommended</string>
+	<string name="threshold_high_insecure">Danger of loss – lower threshold recommended</string>
+	<string name="threshold_defined">Choose Threshold</string>
+
+	<string name="backup_done_info">Backup pieces sent to trusted contacts</string>
+	<string name="backup_done_dismiss">Got it</string>
+
+	<string name="backup_created">Backup created 1/6/2020</string>
+
+	<!-- recovery from the secret owner's POV -->
+
+	<string name="recovery_explainer">You need to meet your trusted contacts in-person to receive pieces by scanning QR codes</string>
+	<string name="recovery_begin">Begin</string>
+	<string name="recovery_failed_to_receive">Failed to receive backup piece</string>
+	<string name="recovery_helpful_suggestions">Please check that bluetooth is swtiched on and that no-one but your trusted contact is able to scan the QR code</string>
+	<string name="recovery_retry">Retry</string>
+	<string name="recovery_recovered_shards">Recovered backup pieces:</string>
+	<string name="recovery_scan_qr_code">Scan QR code</string>
+	<string name="recovery_recovering_account">Recovering account…</string>
+	<string name="recovery_shard_received">Account backup piece received</string>
+	<string name="recovery_account_recovered">Account recovered</string>
+
+	<!-- recovery from the custodian's POV -->
+
+	<string name="custodian_recovery_explainer">You need to meet in-person to transfer backup piece</string>
+	<string name="custodian_recovery_failed_to_send">Failed to send backup piece</string>
+	<string name="custodian_scan_code">Scan code</string>
+	<string name="custodian_shard_sent">Account backup piece transmitted</string>
+
+	<!-- titles for the app bar -->
+
+	<string name="title_distributed_backup">Social Backup</string>
+	<string name="title_select_custodians">Select Trusted Contacts</string>
+	<string name="title_define_threshold">Choose Threshold</string>
+	<string name="title_recovery_mode">Recovery Mode</string>
+	<string name="title_help_recover">Help recover account</string>
+
+	<!-- conversation action for custodian -->
+
+	<string name="help_recover_account">Help recover account</string>
+
+	<!-- setup screen -->
+
+	<string name="setup_new_account">Create new account</string>
+	<string name="setup_restore_account">Restore account from backup</string>
+
+	<!-- Symbols for visualising threshold values for social backup -->
+	<string name="filled_bullet">\u25CF</string>
+    <string name="linear_bullet">\u25CB</string>
+
+	<!-- activity names -->
+	<string name="activity_name_distributed_backup">Social Backup</string>
+	<string name="activity_name_old_distributed_backup">Old Social Backup</string>
+
 </resources>

briar-android/src/main/res/xml/settings.xml

@@ -90,6 +90,17 @@
 		android:layout="@layout/preferences_category"
 		android:title="@string/security_settings_title">
 
+		<Preference
+			android:summary="@string/pref_distributed_backup_summary"
+			android:title="@string/pref_distributed_backup_title"
+			app:iconSpaceReserved="false">
+
+			<intent
+				android:targetClass="org.briarproject.briar.android.socialbackup.DistributedBackupActivity"
+				android:targetPackage="@string/app_package" />
+
+		</Preference>
+
 		<SwitchPreference
 			android:enabled="false"
 			android:key="pref_key_lock"