ANDROID_MARS学习笔记_S05_005_方向传感器

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;

public class MainActivity extends Activity implements SensorEventListener{
     private SensorManager mSensorManager;
      private Sensor mOrientation;

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

        mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        mOrientation = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
      }

      @Override
      public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // Do something here if sensor accuracy changes.
        // You must implement this callback in your code.
      }

      @Override
      protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(this, mOrientation, SensorManager.SENSOR_DELAY_NORMAL);
      }

      @Override
      protected void onPause() {
        super.onPause();
        mSensorManager.unregisterListener(this);
      }

      @Override
      public void onSensorChanged(SensorEvent event) {
        float azimuth_angle = event.values[0];
        float pitch_angle = event.values[1];
        float roll_angle = event.values[2];
        
        System.out.println("azimuth--->" + azimuth_angle);
        System.out.println("pitch_angle--->" + pitch_angle);
        System.out.println("roll_angle--->" + roll_angle);
        // Do something with these orientation angles.
      }
}