android - 如何知道 BroadcastReceiver 中的飞行模式是打开还是关闭？

Question

我在其他问题中看到了多个使用此解决方案的答案，以了解飞行模式是否更改:

IntentFilter intentFilter = new      
IntentFilter("android.intent.action.AIRPLANE_MODE_CHANGED");

BroadcastReceiver receiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
            Log.d("AirplaneMode", "Service state changed");
      }
};

context.registerReceiver(receiver, intentFilter);

但现在我想知道 onReceive 方法中的飞行模式是否打开或关闭。

谢谢。

Answer 1

如 this answer 中所述，您可以通过以下方式检查飞行模式状态:

@SuppressWarnings("deprecation")
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static boolean isAirplaneModeOn(Context context) {        
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
        return Settings.System.getInt(context.getContentResolver(), 
                Settings.System.AIRPLANE_MODE_ON, 0) != 0;          
    } else {
        return Settings.Global.getInt(context.getContentResolver(), 
                Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
    }       
}

如果返回的结果为true，则飞行模式为ON，反之亦然，因此您的完整答案为:

IntentFilter intentFilter = new      
IntentFilter("android.intent.action.AIRPLANE_MODE_CHANGED");

BroadcastReceiver receiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
            Log.d("AirplaneMode", "Service state changed");
            boolean airplane_active = isAirplaneModeOn(context);
      }
};

context.registerReceiver(receiver, intentFilter);