Question

我正在构建一个使用Power Button计数来执行某些操作的应用程序，我有一个BroadcastReceiver和一个帮助我这样做的服务。我使用ACTION_SCREEN_OFF，ACTION_SCREEN_ON和ACTION_USER_PRESENT作为意图过滤器，一切正常，每次按下的电源按钮都执行我想要的操作，但是接近传感器确实可以使用与ACTION_SCREEN_OFF和ACTION_SCREEN_ON相同的场景。因此，当用户拨打电话并且我的服务在后台运行时检查ACTION_SCREEN_OFF和ACTION_SCREEN_ON，以便当呼叫者将设备带离他/她的耳朵时，接近传感器执行相同的操作。我想在这里区分Power Button press和Proximity sensor动作。为了完成这项工作，我应该遵循什么？以下是我的代码的一部分，可能有助于您理解我想要问的内容。

我的类扩展服务在其onCreate（）中包含以下代码：

mReceiver=new PowerButtonActionReciever();
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
registerReceiver(mReceiver, filter);

类扩展BroadcastReceiver捕获电源按钮单击其onReceive（）方法：

    @Override
public void onReceive(Context context, Intent intent) 
{
         //perform some action
}

Answer 1

您可以为接近传感器注册一个监听器，并执行与电话应用程序相同的检查。

private SensorManager mSensorManager;
private Sensor mSensor;
...
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);

public class SensorActivity extends Activity implements SensorEventListener {
  private SensorManager mSensorManager;
  private Sensor mProximity;

  @Override
  public final void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Get an instance of the sensor service, and use that to get an instance of
    // a particular sensor.
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mProximity = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
  }

  @Override
  public final void onAccuracyChanged(Sensor sensor, int accuracy) {
    // Do something here if sensor accuracy changes.
  }

  @Override
  public final void onSensorChanged(SensorEvent event) {
    float distance = event.values[0];
    // Do something with this sensor data.
  }

  @Override
  protected void onResume() {
    // Register a listener for the sensor.
    super.onResume();
    mSensorManager.registerListener(this, mProximity, SensorManager.SENSOR_DELAY_NORMAL);
  }

  @Override
  protected void onPause() {
    // Be sure to unregister the sensor when the activity pauses.
    super.onPause();
    mSensorManager.unregisterListener(this);
  }
}

通过电源按钮和接近传感器区分屏幕开启或屏幕关闭

1 个答案: