百度地图定位

上中心代码

package baidumapsdk.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

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.BaiduMap;
import com.baidu.mapapi.map.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
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.MyLocationConfiguration.LocationMode;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.model.LatLng;

/**
* 此demo用来展示如何结合定位SDK实现定位，并使用MyLocationOverlay绘制定位位置 同时展示如何使用自定义图标绘制并点击时弹出泡泡
*
*/
public class LocationDemo extends Activity {

// 定位相关
LocationClient mLocClient;
public MyLocationListenner myListener = new MyLocationListenner();
private LocationMode mCurrentMode;
BitmapDescriptor mCurrentMarker;

MapView mMapView;
BaiduMap mBaiduMap;

// UI相关
OnCheckedChangeListener radioButtonListener;
Button requestLocButton;
boolean isFirstLoc = true;// 是否首次定位

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
requestLocButton = (Button) findViewById(R.id.button1);
mCurrentMode = LocationMode.NORMAL;
requestLocButton.setText("普通");
OnClickListener btnClickListener = new OnClickListener() {
public void onClick(View v) {
switch (mCurrentMode) {
case NORMAL:
requestLocButton.setText("跟随");
mCurrentMode = LocationMode.FOLLOWING;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case COMPASS:
requestLocButton.setText("普通");
mCurrentMode = LocationMode.NORMAL;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case FOLLOWING:
requestLocButton.setText("罗盘");
mCurrentMode = LocationMode.COMPASS;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
}
}
};
requestLocButton.setOnClickListener(btnClickListener);

RadioGroup group = (RadioGroup) this.findViewById(R.id.radioGroup);
radioButtonListener = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.defaulticon) {
// 传入null则，恢复默认图标
mCurrentMarker = null;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, null));
}
if (checkedId == R.id.customicon) {
// 修改为自定义marker
mCurrentMarker = BitmapDescriptorFactory
.fromResource(R.drawable.icon_geo);
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
}
}
};
group.setOnCheckedChangeListener(radioButtonListener);

// 地图初始化
mMapView = (MapView) findViewById(R.id.bmapView);
mBaiduMap = mMapView.getMap();
// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);
// 定位初始化
mLocClient = new LocationClient(this);
mLocClient.registerLocationListener(myListener);
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);
mLocClient.setLocOption(option);
mLocClient.start();
}

/**
* 定位SDK监听函数
*/
public class MyLocationListenner implements BDLocationListener {

@Override
public void onReceiveLocation(BDLocation location) {
// map view 销毁后不在处理新接收的位置
if (location == null || mMapView == null)
return;
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// 此处设置开发者获取到的方向信息，顺时针0-360
.direction(100).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
mBaiduMap.setMyLocationData(locData);
if (isFirstLoc) {
isFirstLoc = false;
LatLng ll = new LatLng(location.getLatitude(),
location.getLongitude());
MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);
mBaiduMap.animateMapStatus(u);
}
}

public void onReceivePoi(BDLocation poiLocation) {
}
}

@Override
protected void onPause() {
mMapView.onPause();
super.onPause();
}

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

@Override
protected void onDestroy() {
// 退出时销毁定位
mLocClient.stop();
// 关闭定位图层
mBaiduMap.setMyLocationEnabled(false);
mMapView.onDestroy();
mMapView = null;
super.onDestroy();
}

}

1、声明一个LocationClient 定位服务的客户端。宿主程序在客户端声明此类，并调用（客户端通过这个控制定位）

// 定位相关
LocationClient mLocClient;

在onCreate方法里

@Override
public void onCreate(Bundle savedInstanceState) {

// 定位初始化
mLocClient = new LocationClient(this);

mLocClient.registerLocationListener(myListener);

方法解析

registerLocationListener

public void registerLocationListener(BDLocationListener listener)
注册定位监听函数
参数：
BDLocation类 -

LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);
mLocClient.setLocOption(option);
mLocClient.start();

上面就是设置gps坐标类型添加到mLocClient 里面

在listener里编写定位信息

public class MyLocationListenner implements BDLocationListener {

@Override
public void onReceiveLocation(BDLocation location) {
// map view 销毁后不在处理新接收的位置
if (location == null || mMapView == null)
return;
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// 此处设置开发者获取到的方向信息，顺时针0-360
.direction(100).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
mBaiduMap.setMyLocationData(locData);
if (isFirstLoc) {
isFirstLoc = false;
LatLng ll = new LatLng(location.getLatitude(),
location.getLongitude());
MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);
mBaiduMap.animateMapStatus(u);
}
}

public void onReceivePoi(BDLocation poiLocation) {
}
}

然后需要添加一句

// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);

这句很重要，时间紧迫，有点粗略，以后修改讲解。