Android - 如何接收广播意图ACTION_SCREEN_ON / OFF？

Question

 <application>          <receiver android:name=".MyBroadcastReceiver" android:enabled="true">                 <intent-filter>                       <action android:name="android.intent.action.ACTION_SCREEN_ON"></action>                       <action android:name="android.intent.action.ACTION_SCREEN_OFF"></action>                 </intent-filter>          </receiver>...    </application>MyBroadcastReceiver设置只是为了向日志吐出foo。什么也没做。有什么建议吗？我是否需要分配任何权限来捕获意图？

Answer 1

我相信这些行为只能由在Java代码（via registerReceiver()）中注册的接收者接收，而不是通过清单中注册的接收者接收。

Answer 2

或者，您可以使用电源管理器来检测屏幕锁定。

@Override

protected void onPause()

{

    super.onPause();

    // If the screen is off then the device has been locked

    PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);

    boolean isScreenOn;

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {

        isScreenOn = powerManager.isInteractive();

    } else {

        isScreenOn = powerManager.isScreenOn();

    }

    if (!isScreenOn) {

        // The screen has been locked 

        // do stuff...

    }

}