Android GCM 不向设备发送通知消息

Posted 2023-02-24

【中文标题】Android GCM 不向设备发送通知消息

【英文标题】：Android GCM not send notification message to device

【发布时间】：2013-10-24 13:02:04

【问题描述】：

我在从 GCM 服务器获取通知消息时遇到问题。设备在未空闲或处于运行状态时会正确收到通知，但当设备空闲 10-15 分钟时，设备无法收到通知以及所有注册的设备没有收到 GCM 服务器的通知。如何解决这个问题？

【参考方案1】：

通常，您的应用需要在睡眠时唤醒。

将其放入清单文件中，以便在收到消息时唤醒您的设备

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

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;
    

在您的 MainActivity.java 中的“private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver()”中调用上述代码

  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();

;

感谢This source

希望对你有帮助