android之传感器

//模仿微信摇一摇 当加速度大于9.8时产生触发

public class MainActivity extends Activity {

private SensorManager sensorManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

     setContentView(R.layout.activity_main);

    //获取SensorManager实例

    sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

    //指定具体的传感器类型

    Sensor sensor = sensorManager .getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

    //设定接口，指定传感器输出信息的更新速率

     sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_NORMAL);

}

@Override

protected void onDestroy() {

   super.onDestroy();

    if (sensorManager != null) {

        sensorManager.unregisterListener(listener);

     }

}

private SensorEventListener listener = new SensorEventListener() {

 

 

//当传感器监测到得数值发生变化时就会调用该方法

@Override

public void onSensorChanged(SensorEvent event) {

// TODO Auto-generated method stub

    float xValue = Math.abs(event.values[0]);

   float yValue = Math.abs(event.values[1]);

   float zValue = Math.abs(event.values[2]);

     if (xValue > 15 || yValue > 15 || zValue > 15) {

       //处理逻辑

      Toast.makeText(MainActivity.this, "你摇了摇", Toast.LENGTH_SHORT) .show();

      }

  }

   //当传感器的精度发生变化时调用该方法

   @Override

     public void onAccuracyChanged(Sensor sensor, int accuracy) {

         // TODO Auto-generated method stub

      }

   };

}