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我开发了一个应用程序，我需要一个广播接收器来生成有关从 GCM 推送接收消息的通知。

我使用的代码拒绝编译，说明

   "Cannot make a static reference to the non-static method acquire() from
  the type PowerManager.Wakelock"

IDE（日食）现在建议我应该

 remove argument to match "acquire()"

但是，当我这样做时，显示的下一个错误是：

 The method acquire(long) in the type PowerManager.WakeLock is not applicable        
  for the arguements(Context)....

广播接收器的代码是：

   private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
    String newMessage = intent.getExtras().getString(EXTRA_MESSAGE);

    WakeLock.acquire(getApplicationContext());



    // Showing received message
    lblMessage.append(newMessage + "\n");
    Toast.makeText(getApplicationContext(), "New Message: " + newMessage, Toast.LENGTH_LONG).show();

    // Releasing wake lock
    WakeLock.release();
}

我在哪里想念它？

4

1 回答 1

3

如何在broadcastReceiver.中获取唤醒锁？

private PowerManager.WakeLock wakeLock;  //Declaration of Instance variable.

@Override
public void onReceive(Context context, Intent intent) {
    //......Code.....
    PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK |PowerManager.ACQUIRE_CAUSES_WAKEUP 
                       | PowerManager.ON_AFTER_RELEASE,"Wake Lock");
    wakeLock.acquire(15*1000);
    //......Code....
}

在 AndroidManifest.xml 中添加权限

<uses-permission android:name="android.permission.WAKE_LOCK" />
于 2013-03-03T08:39:46.563 回答