BroadcastReceiver电池更换和FLAG_KEEP_SCREEN_ON标志？

Question

在我的主要活动中，我将此标志设置为onCreate：

this.getWindow（）。addFlags（WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON）;

但我希望能够在BroadcastReceiver上将其关闭

android.intent.action.ACTION_BATTERY_LOW”

我怎样才能做到这一点 ？ 我的主应用程序将如何知道已接收到广播并应关闭此标志？ 。

Answer 1

您可以通过在onResume()调用registerReceiver onResume()和onPause() unregisterReceiver（）在活动中以编程方式注册BroadcastReceiver ：

// Placed at your activity level
BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
  public void onReceive(Context context, Intent intent);
    if (Intent.ACTION_BATTERY_LOW.equals(intent.getAction()) {
      // Remove the flag
    } else {
      // Battery is okay, add the flag
    }
}

public void onResume() {
  IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_LOW);
  // Probably also want to receive notification that the battery has gone back up
  filter.addAction(Intent.ACTION_BATTERY_OKAY);    
  registerReceiver(mBroadcastReceiver, filter);
}

public void onPause() {
  unregisterReceiver(mBroadcastReceiver);
}