The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 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 android.accounts; |
| 18 | |
| 19 | import android.content.BroadcastReceiver; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.IntentFilter; |
Fred Quintana | 6030734 | 2009-03-24 22:48:12 -0700 | [diff] [blame] | 23 | import android.os.*; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 24 | |
| 25 | /** |
| 26 | * A helper class that calls back on the provided |
| 27 | * AccountMonitorListener with the set of current accounts both when |
| 28 | * it gets created and whenever the set changes. It does this by |
| 29 | * binding to the AccountsService and registering to receive the |
| 30 | * intent broadcast when the set of accounts is changed. The |
| 31 | * connection to the accounts service is only made when it needs to |
| 32 | * fetch the current list of accounts (that is, when the |
| 33 | * AccountMonitor is first created, and when the intent is received). |
| 34 | */ |
Fred Quintana | 6030734 | 2009-03-24 22:48:12 -0700 | [diff] [blame] | 35 | public class AccountMonitor extends BroadcastReceiver { |
| 36 | private static final String TAG = "AccountMonitor"; |
| 37 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 38 | private final Context mContext; |
| 39 | private final AccountMonitorListener mListener; |
| 40 | private boolean mClosed = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 41 | |
Fred Quintana | 6030734 | 2009-03-24 22:48:12 -0700 | [diff] [blame] | 42 | private volatile Looper mServiceLooper; |
| 43 | private volatile NotifierHandler mServiceHandler; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 44 | |
| 45 | /** |
| 46 | * Initializes the AccountMonitor and initiates a bind to the |
| 47 | * AccountsService to get the initial account list. For 1.0, |
| 48 | * the "list" is always a single account. |
| 49 | * |
| 50 | * @param context the context we are running in |
| 51 | * @param listener the user to notify when the account set changes |
| 52 | */ |
| 53 | public AccountMonitor(Context context, AccountMonitorListener listener) { |
| 54 | if (listener == null) { |
| 55 | throw new IllegalArgumentException("listener is null"); |
| 56 | } |
| 57 | |
| 58 | mContext = context; |
| 59 | mListener = listener; |
| 60 | |
| 61 | // Register a broadcast receiver to monitor account changes |
| 62 | IntentFilter intentFilter = new IntentFilter(); |
Fred Quintana | a698f42 | 2009-04-08 19:14:54 -0700 | [diff] [blame] | 63 | intentFilter.addAction(Constants.LOGIN_ACCOUNTS_CHANGED_ACTION); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 64 | intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK); // To recover from disk-full. |
| 65 | mContext.registerReceiver(this, intentFilter); |
| 66 | |
Fred Quintana | 6030734 | 2009-03-24 22:48:12 -0700 | [diff] [blame] | 67 | HandlerThread thread = new HandlerThread("AccountMonitorHandlerThread"); |
| 68 | thread.start(); |
| 69 | mServiceLooper = thread.getLooper(); |
| 70 | mServiceHandler = new NotifierHandler(mServiceLooper); |
| 71 | |
| 72 | mServiceHandler.sendEmptyMessage(0); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | @Override |
| 76 | public void onReceive(Context context, Intent intent) { |
| 77 | notifyListener(); |
| 78 | } |
| 79 | |
Fred Quintana | a698f42 | 2009-04-08 19:14:54 -0700 | [diff] [blame] | 80 | private Future1Callback<Account[]> mGetAccountsCallback = new Future1Callback<Account[]>() { |
| 81 | public void run(Future1<Account[]> future) { |
| 82 | try { |
| 83 | Account[] accounts = future.getResult(); |
| 84 | String[] accountNames = new String[accounts.length]; |
| 85 | for (int i = 0; i < accounts.length; i++) { |
| 86 | accountNames[i] = accounts[i].mName; |
| 87 | } |
| 88 | mListener.onAccountsUpdated(accountNames); |
| 89 | } catch (OperationCanceledException e) { |
| 90 | // the request was canceled |
| 91 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 92 | } |
Fred Quintana | a698f42 | 2009-04-08 19:14:54 -0700 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | private synchronized void notifyListener() { |
| 96 | AccountManager.get(mContext).getAccounts(mGetAccountsCallback, null /* handler */); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Unregisters the account receiver. Consecutive calls to this |
| 101 | * method are harmless, but also do nothing. Once this call is |
| 102 | * made no more notifications will occur. |
| 103 | */ |
| 104 | public synchronized void close() { |
| 105 | if (!mClosed) { |
| 106 | mContext.unregisterReceiver(this); |
| 107 | mClosed = true; |
| 108 | } |
| 109 | } |
Fred Quintana | 6030734 | 2009-03-24 22:48:12 -0700 | [diff] [blame] | 110 | |
| 111 | private final class NotifierHandler extends Handler { |
| 112 | public NotifierHandler(Looper looper) { |
| 113 | super(looper); |
| 114 | } |
| 115 | |
| 116 | public void handleMessage(Message msg) { |
| 117 | notifyListener(); |
| 118 | } |
| 119 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 120 | } |