Android GCM不向设备发送通知消息

Question

我在从GCM服务器获取通知消息时遇到问题。当设备闲置或处于运行状态但设备空闲10-15分钟时，设备将正确获取通知无法获取通知，并且所有注册的设备都无法从GCM服务器获取通知。如何解决此问题？

Answer 1

通常，您的应用需要在睡眠时唤醒。

1. 将这个到您的清单文件即可唤醒设备时收到消息

   <uses-permission android:name="android.permission.WAKE_LOCK" /> 
   

2. 添加Java类名WakeLocker.java

   public abstract class WakeLocker { 
   private static PowerManager.WakeLock wakeLock; 
   
   public static void acquire(Context context) { 
       if (wakeLock != null) wakeLock.release(); 
   
       PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); 
       wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | 
        PowerManager.ACQUIRE_CAUSES_WAKEUP | 
        PowerManager.ON_AFTER_RELEASE, "WakeLock"); 
       wakeLock.acquire(); 
       } 
   
       public static void release() { 
        if (wakeLock != null) wakeLock.release(); wakeLock = null; 
       } 
   } 
   

3. 调用上面的代码中'private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver（）'可能在你的MainActivity.java中

   private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver() { 
       @Override 
       public void onReceive(Context context, Intent intent) { 
       String newMessage = intent.getExtras().getString(EXTRA_MESSAGE); 
       // Waking up mobile if it is sleeping 
       WakeLocker.acquire(getApplicationContext()); 
   
       /** 
       * Take appropriate action on this message 
       * depending upon your app requirement 
       * For now i am just displaying it on the screen 
       * */ 
   
       // Showing received message 
       lblMessage.append(newMessage + "\n");   
       Toast.makeText(getApplicationContext(), "New Message: " + newMessage, Toast.LENGTH_LONG).show(); 
   
       // Releasing wake lock 
       WakeLocker.release(); 
   } 
   }; 
   

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