package cn.zengfansheng.mybaidumap.location;
import android.os.Bundle;
import android.util.Log;
import cn.zengfansheng.mybaidumap.BaseActivity;
import cn.zengfansheng.mybaidumap.ConstantValue;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.map.LocationData;
import com.baidu.mapapi.map.MyLocationOverlay;
import com.baidu.platform.comapi.basestruct.GeoPoint;
/**
* 定位
*/
public class MyLocation extends BaseActivity {
private static final String TAG = "MyLocation";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1、初始化LocationClient，设置key，注册监听
init();
mapController.setZoom(17);
}
// NOTES===========================定位代码实现===========================
// 参照：http://developer.baidu.com/map/geosdk-android-developv4.0.htm
public LocationClient mLocationClient = null;// 类似HttpClient
public BDLocationListener myListener;
/**
* 一、初始化LocationClient，设置key，注册监听
*/
private void init() {
// 1、初始化LocationClient类
mLocationClient = new LocationClient(getApplicationContext());// LocationClient类必须在主线程中声明。需要Context类型的参数,推荐用getApplicationConext获取全进程有效的context
// 2、设置SDK的KEY
mLocationClient.setAK(ConstantValue.KEY);
// 3、注册监听函数
myListener = new MyBDLocationListener();
mLocationClient.registerLocationListener(myListener);
// 4、设置定位参数
setLocationOption();
// 5、发起定位请求
sendRequest();
}
/**
* 二、实现BDLocationListener接口
*/
private class MyBDLocationListener implements BDLocationListener {
// 1.接收异步返回的定位结果，参数是BDLocation类型参数
@Override
public void onReceiveLocation(BDLocation location) {
if (location == null) {
return;
}
StringBuffer sb = new StringBuffer(256);
sb.append("time : ");
sb.append(location.getTime());
sb.append("\nerror code : ");
sb.append(location.getLocType());
sb.append("\nlatitude : ");
sb.append(location.getLatitude());
sb.append("\nlontitude : ");
sb.append(location.getLongitude());
sb.append("\nradius : ");
sb.append(location.getRadius());
if (location.getLocType() == BDLocation.TypeGpsLocation) {
sb.append("\nspeed : ");
sb.append(location.getSpeed());
sb.append("\nsatellite : ");
sb.append(location.getSatelliteNumber());
} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
sb.append("\naddr : ");
sb.append(location.getAddrStr());
}
Log.i(TAG, sb.toString());
MyLocationOverlay myLocationOverlay = new MyLocationOverlay(mMapView);
LocationData data = new LocationData();
data.latitude = location.getLatitude();
data.longitude = location.getLongitude();
myLocationOverlay.setData(data);
mMapView.getOverlays().clear();// 清除之前定位留下来的Overlay覆盖物
mMapView.getOverlays().add(myLocationOverlay);
mMapView.refresh();
mapController.animateTo(new GeoPoint((int)(data.latitude*1E6),(int)(data.longitude*1E6)));
}
// 2.接收异步返回的POI查询结果，参数是BDLocation类型参数。
@Override
public void onReceivePoi(BDLocation poiLocation) {
}
}
/**
* 三、设置定位参数:设置定位参数包括：定位模式（单次定位，定时定位），返回坐标类型，是否打开GPS等等。eg：
*/
private void setLocationOption() {
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);
option.setAddrType("all");// 返回的定位结果包含地址信息
option.setCoorType("bd09ll");// 返回的定位结果是百度经纬度,默认值gcj02
option.setScanSpan(3000);// 设置发起定位请求的间隔时间为5000ms
option.disableCache(true);// 禁止启用缓存定位
option.setPoiNumber(5); // 最多返回POI个数
option.setPoiDistance(1000); // poi查询距离
option.setPoiExtraInfo(true); // 是否需要POI的电话和地址等详细信息
mLocationClient.setLocOption(option);
}
/**
* 四、发起定位请求：发起定位请求。请求过程是异步的，定位结果在上面的监听函数onReceiveLocation中获取。
*/
private void sendRequest() {
if (mLocationClient != null && mLocationClient.isStarted())
mLocationClient.requestLocation();
else
Log.d(TAG, "locClient is null or not started");
}
@Override
protected void onResume() {
super.onResume();
if (mLocationClient == null) {
mLocationClient = new LocationClient(getApplicationContext());
}
mLocationClient.start();
}
@Override
protected void onPause() {
super.onPause();
if (mLocationClient!=null) {
mLocationClient.stop();
mLocationClient = null;
}
}
}
1、百度地图定位v4.0开发指南：