1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.inputmethod.latin.accounts;
18 
19 import android.accounts.AccountManager;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.content.SharedPreferences;
24 import android.preference.PreferenceManager;
25 import android.text.TextUtils;
26 import android.util.Log;
27 
28 import com.android.inputmethod.annotations.UsedForTesting;
29 import com.android.inputmethod.latin.settings.LocalSettingsConstants;
30 
31 /**
32  * {@link BroadcastReceiver} for {@link AccountManager#LOGIN_ACCOUNTS_CHANGED_ACTION}.
33  */
34 public class AccountsChangedReceiver extends BroadcastReceiver {
35     static final String TAG = "AccountsChangedReceiver";
36 
37     @Override
onReceive(Context context, Intent intent)38     public void onReceive(Context context, Intent intent) {
39         if (!AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION.equals(intent.getAction())) {
40             Log.w(TAG, "Received unknown broadcast: " + intent);
41             return;
42         }
43 
44         // Ideally the account preference could live in a different preferences file
45         // that wasn't being backed up and restored, however the preference fragments
46         // currently only deal with the default shared preferences which is why
47         // separating this out into a different file is not trivial currently.
48         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
49         final String currentAccount = prefs.getString(
50                 LocalSettingsConstants.PREF_ACCOUNT_NAME, null);
51         removeUnknownAccountFromPreference(prefs, getAccountsForLogin(context), currentAccount);
52     }
53 
54     /**
55      * Helper method to help test this receiver.
56      */
57     @UsedForTesting
getAccountsForLogin(Context context)58     protected String[] getAccountsForLogin(Context context) {
59         return LoginAccountUtils.getAccountsForLogin(context);
60     }
61 
62     /**
63      * Removes the currentAccount from preferences if it's not found
64      * in the list of current accounts.
65      */
removeUnknownAccountFromPreference(final SharedPreferences prefs, final String[] accounts, final String currentAccount)66     private static void removeUnknownAccountFromPreference(final SharedPreferences prefs,
67             final String[] accounts, final String currentAccount) {
68         if (currentAccount == null) {
69             return;
70         }
71         for (final String account : accounts) {
72             if (TextUtils.equals(currentAccount, account)) {
73                 return;
74             }
75         }
76         Log.i(TAG, "The current account was removed from the system: " + currentAccount);
77         prefs.edit()
78                 .remove(LocalSettingsConstants.PREF_ACCOUNT_NAME)
79                 .apply();
80     }
81 }
82