Android GCM不向設備發送通知消息

Question

我在從GCM服務器獲取通知消息時遇到問題。當設備閒置或處於運行狀態但設備空閒10-15分鐘時，設備將正確獲取通知無法獲取通知，並且所有註冊的設備都無法從GCM服務器獲取通知。如何解決此問題？

Answer 1

通常，您的應用需要在睡眠時喚醒。

1. 將這個到您的清單文件即可喚醒設備時收到消息

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

2. 添加Java類名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. 調用上面的代碼中'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(); 
   } 
   }; 
   

   感謝This source

   希望這有助於