两种Sensor 的打开用例

最新推荐文章于 2022-10-01 13:13:26 发布

原创最新推荐文章于 2022-10-01 13:13:26 发布 · 697 阅读

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CC 4.0 BY-SA版权

本文介绍了一个Android应用中如何使用SensorEventListener接口来实现光线传感器(Lsensor)和接近传感器(PSensor)的功能。通过注册监听器并处理传感器数据变化，能够实时更新界面上显示的光线强度和距离信息。

P Sensor 跟 L sensor 都可以用的类

private SensorManager mMgr;

class AlsListener implements SensorEventListener {

  @Override
  public void onAccuracyChanged(Sensor sensor, int accuracy) {
  }

  @Override
  public void onSensorChanged(SensorEvent event) {

   float[] values = event.values;

   if (mAlsEnabled && event.sensor.getType() == Sensor.TYPE_LIGHT) {

    tv_als.setText("Lux:    " + Float.toString(values[0]));

   }
  }

}

class PsListener implements SensorEventListener {
  @Override
  public void onAccuracyChanged(Sensor sensor, int accuracy) {
  }

  @Override
  public void onSensorChanged(SensorEvent event) {
   float[] values = event.values;
   if (mPsEnabled && event.sensor.getType() == Sensor.TYPE_PROXIMITY) {

    tv_ps.setText(String.format("Distances:    %.1f", values[0]));
   }
  }
}

protected void SetPSensor() {

  System.out.println("##########SetPSensor");

  List sensors = mMgr.getSensorList(Sensor.TYPE_PROXIMITY);

  Sensor someSensor = mMgr.getDefaultSensor(Sensor.TYPE_PROXIMITY);

  if (sensors.size() > 0) {

   mMgr.registerListener(mPsListener, (Sensor) sensors.get(0),

     SensorManager.SENSOR_DELAY_NORMAL);

  }

  PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
  wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP
    | PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "TAG");
  wl.acquire();
}

protected void SetLSensor() {
  List sensors = mMgr.getSensorList(Sensor.TYPE_LIGHT);
  Sensor someSensor = mMgr.getDefaultSensor(Sensor.TYPE_LIGHT);
  if (sensors.size() > 0) {

   mMgr.registerListener(mAlsListener, (Sensor) sensors.get(0),
     SensorManager.SENSOR_DELAY_NORMAL);
  }
}

protected void UnPSensor() {
mMgr.unregisterListener(mPsListener);
}

protected void UnLSensor() {
mMgr.unregisterListener(mAlsListener);
}