GCM wakelock权限

Question

在看到来自谷歌的关于performance patterns video的视频后，我决定实现google Cloud Messaging。但是当我在Android上实现GCM时，我发现GCM使用了一些权限，其中之一就是"wakelock“。但正如我们所知，这个权限“等同于”电池消耗。

所以我的问题是，我们如何处理这个问题？Lib GCM为我们做这件事？？使用pull通知比使用pull更好？

谢谢

Answer 1

你不需要这么做。谷歌提供了一项服务，可以为你处理所有事情。如下所示：

 public class GcmListenerService extends com.google.android.gms.gcm.GcmListenerService {

private static final String TAG = "GcmListenerService";

/**
 * Called when message is received.
 *
 * @param from SenderID of the sender.
 * @param data Data bundle containing message data as key/value pairs.
 *             For Set of keys use data.keySet().
 */
// [START receive_message]
@Override
public void onMessageReceived(String from, Bundle data) {
    String message = data.getString("message");
    Log.d(TAG, "From: " + from);
    Log.d(TAG, "Message: " + message);

    if (from.startsWith("/topics/")) {
        // message received from some topic.
    } else {
        // normal downstream message.
    }

    // [START_EXCLUDE]
    /**
     * Production applications would usually process the message here.
     * Eg: - Syncing with server.
     *     - Store message in local database.
     *     - Update UI.
     */

    /**
     * In some cases it may be useful to show a notification indicating to the user
     * that a message was received.
     */
    sendNotification(message);
    // [END_EXCLUDE]
}
// [END receive_message]

/**
 * Create and show a simple notification containing the received GCM message.
 *
 * @param message GCM message received.
 */
private void sendNotification(String message) {
    Intent intent = new Intent(this, TabAllItemsActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, Resources.GCM_NOTIFICATION_REQUEST_CODE, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.mipmap.ic_notification)
            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.icon_app))
            .setContentTitle("Message from Faroque")
            .setContentText(message)
            .setColor(R.color.orange_dark)//setting the brand color
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);//This intent will be executed when user tap on it

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(Resources.GCM_NOTIFICATION_ID, notificationBuilder.build());
}

}

Here是一个教程，如果你愿意，你可以查看。谢谢

Answer 2

定义wakelock权限本身不会导致电池耗尽。误用wakelock会造成这种情况。GcmListenerService为您管理唤醒锁，这也是为什么使用GcmListenerService是一个好主意的原因之一，因为您不必自己管理唤醒锁(这不是微不足道的)。