package com.imooc.baidumap;
 
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
 
public class MyOrientationListener implements SensorEventListener {
 
 private SensorManager mSensorManager;
 private Context context;
 private Sensor mSensor;// 传感器
 
 private float lastX;
 
 public MyOrientationListener(Context context) {
 this.context = context;
 }
 
 // 开启监听
 @SuppressWarnings("deprecation")
 public void start() {
 //获得系统服务
 mSensorManager=(SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
 if(mSensorManager!=null){
  //获得方向传感器
  mSensor=mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
 }
 if(mSensor!=null){
  mSensorManager.registerListener(this, mSensor,SensorManager.SENSOR_DELAY_UI);//第三个参数为经度
 }
 }
 
 // 结束监听
 public void stop() {
 //停止定位
 mSensorManager.unregisterListener(this);
 }
 
 // 经度发生改变时
 @Override
 public void onAccuracyChanged(Sensor arg0, int arg1) {
 
 }
 
 // 纬度发生改变时
 @Override
 public void onSensorChanged(SensorEvent event) {
 //如果事件返回的类型是方向传感器
 if(event.sensor.getType()==Sensor.TYPE_ORIENTATION){
  float x=event.values[SensorManager.DATA_X];
  //如果变化大于一度
  if(Math.abs(x-lastX)>1.0){
  //通知主界面进行回掉
  if(mOnOrientationListener!=null){
   mOnOrientationListener.onOrientationChanged(x);
  }
  }
  lastX=x;
 }
 }
 
 
 private OnOrientationListener mOnOrientationListener;
 
 public void setmOnOrientationListener(
  OnOrientationListener mOnOrientationListener) {
 this.mOnOrientationListener = mOnOrientationListener;
 }
 
 //回掉接口
 public interface OnOrientationListener{
 void onOrientationChanged(float x);
 }
}

package com.imooc.baidumap;
 
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.location.LocationClientOption.LocationMode;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.model.LatLng;
import com.imooc.baidumap.MyOrientationListener.OnOrientationListener;
 
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
 
public class MainActivity extends Activity {
 
 private MapView mv_map;
 private BaiduMap baiduMap;
 
 // 定位相关
 private LocationClient mLocationClient;
 private MyLocationListener mLocationListener;
 private boolean isFirstIn = true;
 private double mLatitude; // 记录最新经纬度
 private double mLongtitude;
 
 // 自定义定位图标
 private BitmapDescriptor mIconLocation;
 private MyOrientationListener mOrientationListener;
 private float mCurrentX;
 
 // 模式变量
 private com.baidu.mapapi.map.MyLocationConfiguration.LocationMode mLocationMode;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 
 // 在使用SDK各组件之前初始化context信息，传入ApplicationContext
 // 注意该方法要再setContentView方法之前实现
 SDKInitializer.initialize(getApplicationContext());
 setContentView(R.layout.activity_main);
 
 // 初始化控件
 init();
 
 // 初始化定位
 initLocation();
 }
 
 // 初始化控件
 private void init() {
 mv_map = (MapView) findViewById(R.id.mv_map);
 baiduMap = mv_map.getMap();
 MapStatusUpdate msu = MapStatusUpdateFactory.zoomTo(15.0f);// 设置地图放大比例
 baiduMap.setMapStatus(msu);
 }
 
 @Override
 protected void onStart() {
 super.onStart();
 baiduMap.setMyLocationEnabled(true);
 if (!mLocationClient.isStarted()) {
  // 开启定位
  mLocationClient.start();
  // 开启方向传感器
  mOrientationListener.start();
 }
 }
 
 @Override
 protected void onStop() {
 super.onStop();
 baiduMap.setMyLocationEnabled(false);
 // 停止定位
 mLocationClient.stop();
 // 停止方向传感器
 mOrientationListener.stop();
 }
 
 @Override
 protected void onResume() {
 super.onResume();
 // 在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理
 mv_map.onResume();
 }
 
 @Override
 protected void onPause() {
 super.onPause();
 // 在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理
 mv_map.onPause();
 
 }
 
 @Override
 protected void onDestroy() {
 super.onDestroy();
 // 在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理
 mv_map.onDestroy();
 }
 
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.main, menu);
 return super.onCreateOptionsMenu(menu);
 }
 
 // 点击菜单进行切换地图
 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
 switch (item.getItemId()) {
 case R.id.id_map_common: // 普通地图
  baiduMap.setMapType(BaiduMap.MAP_TYPE_NORMAL);
  break;
 
 case R.id.id_map_site: // 卫星地图
  baiduMap.setMapType(BaiduMap.MAP_TYPE_SATELLITE);
  break;
 
 case R.id.id_map_traffic: // 实时交通
  if (baiduMap.isTrafficEnabled()) {
  baiduMap.setTrafficEnabled(false);
  item.setTitle("实时交通(off)");
  } else {
  baiduMap.setTrafficEnabled(true);
  item.setTitle("实时交通(on)");
  }
  break;
 case R.id.id_map_location:
  centerToMyLocat();
  break;
 case R.id.id_map_mode_common:
  mLocationMode = com.baidu.mapapi.map.MyLocationConfiguration.LocationMode.NORMAL;
  break;
 case R.id.id_map_mode_following:
  mLocationMode = com.baidu.mapapi.map.MyLocationConfiguration.LocationMode.FOLLOWING;
  break;
 case R.id.id_map_mode_compass:
  mLocationMode = com.baidu.mapapi.map.MyLocationConfiguration.LocationMode.COMPASS;
  break;
 default:
  break;
 }
 return super.onOptionsItemSelected(item);
 }
 
 // 定位到我的位置
 private void centerToMyLocat() {
 LatLng latLng = new LatLng(mLatitude, mLongtitude);
 MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(latLng);
 baiduMap.animateMapStatus(msu);
 }
 
 private class MyLocationListener implements BDLocationListener {
 @Override
 public void onReceiveLocation(BDLocation location) {
  MyLocationData data = new MyLocationData.Builder()//
   .direction(mCurrentX)//
   .accuracy(location.getRadius())//
   .latitude(location.getLatitude())//
   .longitude(location.getLongitude())//
   .build();
  baiduMap.setMyLocationData(data);
 
  // 更新位置
  mLatitude = location.getLatitude();
  mLongtitude = location.getLongitude();
  // 判断是否第一次进入
  if (isFirstIn) {
  LatLng latLng = new LatLng(location.getLatitude(),
   location.getLongitude());
  MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(latLng);
  baiduMap.animateMapStatus(msu);
 
  isFirstIn = false;
  }
  // 设置自定义图标
  MyLocationConfiguration config = new MyLocationConfiguration(
   mLocationMode, true, mIconLocation);
  baiduMap.setMyLocationConfigeration(config);
 }
 }
 
 // 初始化定位
 private void initLocation() {
 mLocationMode = com.baidu.mapapi.map.MyLocationConfiguration.LocationMode.NORMAL; // 默认模式
 mLocationClient = new LocationClient(this);
 mLocationListener = new MyLocationListener();
 mLocationClient.registerLocationListener(mLocationListener);
 
 LocationClientOption option = new LocationClientOption();
 option.setCoorType("bd0911");
 option.setIsNeedAddress(true);
 option.setOpenGps(true);
 option.setScanSpan(1000);// 每个多少秒进行一次请求
 
 mLocationClient.setLocOption(option);
 // 初始化图标
 mIconLocation = BitmapDescriptorFactory.fromResource(R.drawable.arrow);
 
 mOrientationListener = new MyOrientationListener(this);
 
 mOrientationListener
  .setmOnOrientationListener(new OnOrientationListener() {
 
   @Override
   public void onOrientationChanged(float x) {
   mCurrentX = x;
   }
  });
 }
 
}

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