[Remoting Android] Talkback confirmation for changing account

remoting/android/java/src/org/chromium/chromoting/Chromoting.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chromoting;
 
 import android.annotation.SuppressLint;
 import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.support.v4.content.ContextCompat;
 import android.support.v4.graphics.drawable.DrawableCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.ContextMenu;
@@ skipping 572 matching lines @@
             @Override
             public void onError(OAuthTokenFetcher.Error error) {
                 showAuthErrorMessage(error);
                 updateHostListView();
             }
         });
     }
 
     @Override
     public void onAccountSelected(String accountName) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+            String logInAnnouncement = getString(R.string.log_in_account_description, accountName);

[Yuwei, 2016/10/07 19:16:30]

Just double check to be safe. Will accountName ever be null or empty string in
special situation like no account is available?

[Lambros, 2016/10/07 20:46:22]

This is OK - onAccountSelected() should never be called with a null account. If
there are no accounts, we show a warning dialog then close the Activity.

[Yuwei, 2016/10/10 21:43:31]

Acknowledged.

+            mAccountSwitcher.getView().announceForAccessibility(logInAnnouncement);
+        }
         mAccount = accountName;
         JniInterface.setAccountForLogging(accountName);
 
         // The current host list is no longer valid for the new account, so clear the list.
         mHosts = new HostInfo[0];
         updateUi();
         refreshHostList();
     }
 
     @Override
@@ skipping 108 matching lines @@
                 // Unreachable, but required by Google Java style and findbugs.
                 assert false : "Unreached";
         }
 
         if (dismissProgress && mProgressIndicator != null) {
             mProgressIndicator.dismiss();
             mProgressIndicator = null;
         }
     }
 }