Implement signout after language change via view model event

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

@@ -46,11 +46,16 @@ public class SettingsActivity extends BriarActivity {
 
 		setContentView(R.layout.activity_settings);
 
-		if (featureFlags.shouldEnableProfilePictures()) {
-			ViewModelProvider provider =
-					new ViewModelProvider(this, viewModelFactory);
-			settingsViewModel = provider.get(SettingsViewModel.class);
+		ViewModelProvider provider =
+				new ViewModelProvider(this, viewModelFactory);
+		settingsViewModel = provider.get(SettingsViewModel.class);
 
+		settingsViewModel.getLanguageChange().observeEvent(this, b -> {
+			signOut(false, false);
+			finishAffinity();
+		});
+
+		if (featureFlags.shouldEnableProfilePictures()) {
 			TextView textViewUserName = findViewById(R.id.username);
 			CircleImageView imageViewAvatar =
 					findViewById(R.id.avatarImage);
@@ -118,9 +123,4 @@ public class SettingsActivity extends BriarActivity {
 				ConfirmAvatarDialogFragment.TAG);
 	}
 
-	void languageChanged() {
-		signOut(false, false);
-		finishAffinity();
-	}
-
 }

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

@@ -45,6 +45,7 @@ import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 import androidx.core.content.ContextCompat;
 import androidx.core.text.TextUtilsCompat;
+import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.ListPreference;
 import androidx.preference.Preference;
 import androidx.preference.Preference.OnPreferenceChangeListener;
@@ -163,12 +164,19 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	LocationUtils locationUtils;
 	@Inject
 	CircumventionProvider circumventionProvider;
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private SettingsViewModel viewModel;
 
 	@Override
 	public void onAttach(Context context) {
 		super.onAttach(context);
 		listener = (SettingsActivity) context;
 		listener.getActivityComponent().inject(this);
+
+		viewModel = new ViewModelProvider(requireActivity(), viewModelFactory)
+				.get(SettingsViewModel.class);
 	}
 
 	@Override
@@ -636,7 +644,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		builder.setPositiveButton(R.string.sign_out_button,
 				(dialogInterface, i) -> {
 					language.setValue(newValue);
-					listener.languageChanged();
+					viewModel.languageChanged();
 				});
 		builder.setNegativeButton(R.string.cancel, null);
 		builder.setCancelable(false);

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

@@ -56,6 +56,9 @@ class SettingsViewModel extends AndroidViewModel {
 	private final MutableLiveEvent<Boolean> setAvatarFailed =
 			new MutableLiveEvent<>();
 
+	private final MutableLiveEvent<Boolean> languageChanged =
+			new MutableLiveEvent<>();
+
 	@Inject
 	SettingsViewModel(Application application,
 			IdentityManager identityManager,
@@ -83,6 +86,10 @@ class SettingsViewModel extends AndroidViewModel {
 		return setAvatarFailed;
 	}
 
+	LiveEvent<Boolean> getLanguageChange() {
+		return languageChanged;
+	}
+
 	private void loadOwnIdentityInfo() {
 		dbExecutor.execute(() -> {
 			try {
@@ -131,4 +138,8 @@ class SettingsViewModel extends AndroidViewModel {
 		});
 	}
 
+	void languageChanged() {
+		languageChanged.setEvent(true);
+	}
+
 }