android 实现手机方向识别

//自定义导航图标
private BitmapDescriptor mIconLocation;
//自定义传感器implements SensorEventListener
private MyOrientationListener myOrientationListener;
//把监听的x方向的值存储到这里
private float mCurrentX;

    //初始化图标
        mIconLocation = BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher);
        //初始化回调接口
        myOrientationListener = new MyOrientationListener(getApplicationContext());
        //设置回调接口
        myOrientationListener.setOnOrientationListener(new OnOrientationListener() {

            @Override
            public void OnOrientationChanged(float x) {
                // TODO Auto-generated method stub
                //回调接口的值存入mCurrentX
                mCurrentX=x;
            }
        });

在Activity的生命周期里面实现 与 方向识别的生命周期同步

start方法里面

    //方向识别开始
        myOrientationListener.start();      

stop方法里面

//停止方向传感器
        myOrientationListener.stop();

在本地数据设置里面

    MyLocationData data = new MyLocationData.Builder()
    //设置方向
    .direction(mCurrentX)

//设置自定义图标
        MyLocationConfiguration config = new MyLocationConfiguration(com.baidu.mapapi.map.MyLocationConfiguration.LocationMode.NORMAL, 
                        true, mIconLocation);
                mBaiduMap.setMyLocationConfigeration(config);

下面是传感器监听的实现代码

public class MyOrientationListener implements SensorEventListener{
    //用来获取Seosor
    private SensorManager mSensorManager;
    private Sensor mSensor;
    private Context mcontext;   
    private float lastX;
    private OnOrientationListener mOnOrientationListener;

    public MyOrientationListener(Context context) {
        super();
        context=this.mcontext;
    }
    @SuppressWarnings("deprecation")
    //开启监听的方法
    public void start(){
            mSensorManager = (SensorManager) mcontext.getSystemService(Context.SENSOR_SERVICE);
            if(mSensorManager!=null){
            mSensor = mSensorManager.getDefaultSensor(SensorManager.SENSOR_ORIENTATION);            
        }
            if(mSensor!=null){
            //注册监听
                mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_UI);
            }
    }
    //停止监听的方法
    public void stop(){
        mSensorManager.unregisterListener(this);
    }

    @Override
    public void onAccuracyChanged(Sensor arg0, int arg1) {

    }

    @Override
    public void onSensorChanged(SensorEvent event) {
//拿到方向传感器       if(event.sensor.getType()==Sensor.TYPE_ORIENTATION){
            float x = event.values[SensorManager.DATA_X];
            //如果移动超过一个精度则转向
            if(Math.abs(x-lastX)>1.0){
                if(mOnOrientationListener!=null){
                    mOnOrientationListener.OnOrientationChanged(x);
                }
            }
            lastX  =x;
        }       
    }

    public void setOnOrientationListener(OnOrientationListener mOnOrientationListener) {
        this.mOnOrientationListener = mOnOrientationListener;
    }
//定义回调接口
    public interface OnOrientationListener{
    //传递改变的监听的x方向的值
        void OnOrientationChanged(float x);
    }
}