| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.accounts; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.ServiceConnection; |
| import android.database.SQLException; |
| import android.os.IBinder; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| /** |
| * A helper class that calls back on the provided |
| * AccountMonitorListener with the set of current accounts both when |
| * it gets created and whenever the set changes. It does this by |
| * binding to the AccountsService and registering to receive the |
| * intent broadcast when the set of accounts is changed. The |
| * connection to the accounts service is only made when it needs to |
| * fetch the current list of accounts (that is, when the |
| * AccountMonitor is first created, and when the intent is received). |
| */ |
| public class AccountMonitor extends BroadcastReceiver implements ServiceConnection { |
| private final Context mContext; |
| private final AccountMonitorListener mListener; |
| private boolean mClosed = false; |
| |
| // This thread runs in the background and runs the code to update accounts |
| // in the listener. |
| private class AccountUpdater extends Thread { |
| private IBinder mService; |
| |
| public AccountUpdater(IBinder service) { |
| mService = service; |
| } |
| |
| @Override |
| public void run() { |
| Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); |
| IAccountsService accountsService = IAccountsService.Stub.asInterface(mService); |
| String[] accounts; |
| try { |
| accounts = accountsService.getAccounts(); |
| } catch (RemoteException e) { |
| // if the service was killed then the system will restart it and when it does we |
| // will get another onServiceConnected, at which point we will do a notify. |
| Log.w("AccountMonitor", "Remote exception when getting accounts", e); |
| return; |
| } |
| mContext.unbindService(AccountMonitor.this); |
| |
| try { |
| mListener.onAccountsUpdated(accounts); |
| } catch (SQLException e) { |
| // Better luck next time. If the problem was disk-full, |
| // the STORAGE_OK intent will re-trigger the update. |
| Log.e("AccountMonitor", "Can't update accounts", e); |
| } |
| } |
| } |
| |
| /** |
| * Initializes the AccountMonitor and initiates a bind to the |
| * AccountsService to get the initial account list. For 1.0, |
| * the "list" is always a single account. |
| * |
| * @param context the context we are running in |
| * @param listener the user to notify when the account set changes |
| */ |
| public AccountMonitor(Context context, AccountMonitorListener listener) { |
| if (listener == null) { |
| throw new IllegalArgumentException("listener is null"); |
| } |
| |
| mContext = context; |
| mListener = listener; |
| |
| // Register an intent receiver to monitor account changes |
| IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(AccountsServiceConstants.LOGIN_ACCOUNTS_CHANGED_ACTION); |
| intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK); // To recover from disk-full. |
| mContext.registerReceiver(this, intentFilter); |
| |
| // Send the listener the initial state now. |
| notifyListener(); |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| notifyListener(); |
| } |
| |
| public void onServiceConnected(ComponentName className, IBinder service) { |
| // Create a background thread to update the accounts. |
| new AccountUpdater(service).start(); |
| } |
| |
| public void onServiceDisconnected(ComponentName className) { |
| } |
| |
| private void notifyListener() { |
| // initiate the bind |
| if (!mContext.bindService(AccountsServiceConstants.SERVICE_INTENT, this, |
| Context.BIND_AUTO_CREATE)) { |
| // This is normal if GLS isn't part of this build. |
| Log.w("AccountMonitor", |
| "Couldn't connect to the accounts service (Missing service?)"); |
| } |
| } |
| |
| /** |
| * calls close() |
| * @throws Throwable |
| */ |
| @Override |
| protected void finalize() throws Throwable { |
| close(); |
| super.finalize(); |
| } |
| |
| /** |
| * Unregisters the account receiver. Consecutive calls to this |
| * method are harmless, but also do nothing. Once this call is |
| * made no more notifications will occur. |
| */ |
| public synchronized void close() { |
| if (!mClosed) { |
| mContext.unregisterReceiver(this); |
| mClosed = true; |
| } |
| } |
| } |