public class Activity extends ActionBarActivity
implements SensorEventListener{
    SensorManager sensorManager;
    EditText et_sensor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        et_sensor 
 
= (EditText) findViewById(R.id.et_sensor);
        sensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);
    }

    @Override
    protected void onResume() {
        super.onResume();

        sensorManager.registerListener(this,sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
                SensorManager.SENSOR_DELAY_GAME);

    }

    @Override
    
 
protected void onStop() {
        sensorManager.unregisterListener(this);
        super.onStop();
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        float[] values = event.values;

        StringBuilder sb = new StringBuilder();
        sb.append("rate of x axis : "+values[0]);
        sb.append(
 
"\n rate of y axis : " + values[1]);
        sb.append("\n rate of z axis : " + values[2]);
        et_sensor.setText(sb.toString());

    }

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

    }
}

方向傳感器