package com.example.sensor01; import java.util.List; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.TextView; public class MainActivity extends Activity implements SensorEventListener{ private SensorManager mSensorManager; private TextView textview; private float[] mags; private float[] accs; private float[] oris; private float[] rotate; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textview = (TextView) findViewById(R.id.content); mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); //Sensor.TYPE_ORIENTATION 在新版本中已经放弃 Sensor magsensor = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD); Sensor accsensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); mSensorManager.registerListener(this, magsensor, SensorManager.SENSOR_DELAY_FASTEST); mSensorManager.registerListener(this, accsensor, SensorManager.SENSOR_DELAY_FASTEST); mags = new float[3]; accs = new float[3]; oris = new float[3]; rotate = new float[9]; } @Override public void onAccuracyChanged(Sensor arg0, int arg1) { // TODO Auto-generated method stub } @Override public void onSensorChanged(SensorEvent event) { if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD){ mags = event.values;//x轴地磁强度 } if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER){ accs = event.values;//x轴地磁强度 } mSensorManager.getRotationMatrix(rotate, null, accs, mags); mSensorManager.getOrientation(rotate, oris); /*oris[0] :azimuth 方向角,但用(磁场+加速度)得到的数据范围是(-180~180),也就是说,0表示正北,90表示正东,180/-180表示正南,-90表示正西。 oris[1] :pitch 倾斜角 即由静止状态开始,围绕X轴前后翻转 oris[2] :roll 旋转角 即由静止状态开始,围绕Y轴左右翻转*/ double azimuth = Math.toDegrees(oris[0]); if (azimuth<0) { azimuth=azimuth + 360; } double pitch = Math.toDegrees(oris[1]); double roll = Math.toDegrees(oris[2]); textview.setText(String.valueOf(azimuth) + " " + String.valueOf(pitch) + " " + String.valueOf(roll)); } }