本文主要讲述利用百度地图API实现定位功能

第一步:下载SDK与申请KEY

参考链接：Android 百度地图 SDK v3.0.0 （一） - Hongyang - 博客频道 - CSDN.NET

注意

百度地图SDK与百度定位SDK已经分开了，如果在工程中同时导入这两个包，会冲突，解决方法是下载包含这两个功能的SDK

参考链接： 百度地图SDK和百度导航SDK合并冲突问题 - Singleton1900的专栏 - 博客频道 - CSDN.NET

代码实现

将地图中心点移到指定点实现

//设定中心点坐标 
LatLng cenpt =  new LatLng(30.663791,104.07281);  
//定义地图状态 
MapStatus mMapStatus = new MapStatus.Builder() 
.target(cenpt) 
.zoom(12) 
.build(); 
//定义MapStatusUpdate对象，以便描述地图状态将要发生的变化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); 
//改变地图状态 
mBaiduMap.setMapStatus(mMapStatusUpdate);

参考链接：

百度地图一打开就自动将中心点移动到定位位置 - 开源中国社区

要实现定位功能，得到经纬度

第一步：配置Manifest文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.zj.mapdemo"android:versionCode="1"android:versionName="1.0" ><uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" ></uses-permission><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" ></uses-permission><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" ></uses-permission><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" ></uses-permission><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" ></uses-permission><uses-permission android:name="android.permission.READ_PHONE_STATE" ></uses-permission><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" ></uses-permission><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" ></uses-permission><uses-permission android:name="android.permission.READ_LOGS" ></uses-permission><uses-permission android:name="android.permission.VIBRATE" /><uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.WRITE_SETTINGS" /><uses-sdk
        android:minSdkVersion="8"android:targetSdkVersion="21" /><application
        android:name="com.zj.mapdemo.LocationApplication"android:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><service
            android:name="com.baidu.location.f"android:enabled="true"android:process=":remote" ><intent-filter><action android:name="com.baidu.location.service_v2.2" ></action></intent-filter></service>      <meta-data
            android:name="com.baidu.lbsapi.API_KEY"android:value="B7h1TyUxC0nNGm4wsalDWHPnsCI9tNke" /><activity
            android:name=".MainActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

写Application文件,实例化LocationService

package com.zj.mapdemo;import com.baidu.mapapi.SDKInitializer;
import com.zj.mapdemo.LocationService;
import com.zj.mapdemo.WriteLog;
import android.app.Application;
import android.app.Service;
import android.os.Vibrator;/*** 主Application，所有百度定位SDK的接口说明请参考线上文档：http://developer.baidu.com/map/loc_refer/index.html** 百度定位SDK官方网站：http://developer.baidu.com/map/index.php?title=android-locsdk* * 直接拷贝com.baidu.location.service包到自己的工程下，简单配置即可获取定位结果，也可以根据demo内容自行封装*/
public class LocationApplication extends Application {public LocationService locationService;public Vibrator mVibrator;@Overridepublic void onCreate() {super.onCreate();/**** 初始化定位sdk，建议在Application中创建*/locationService = new LocationService(getApplicationContext());mVibrator =(Vibrator)getApplicationContext().getSystemService(Service.VIBRATOR_SERVICE);WriteLog.getInstance().init(); // 初始化日志SDKInitializer.initialize(getApplicationContext());  }
}

locationService实现

package com.zj.mapdemo;import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.location.LocationClientOption.LocationMode;
import android.content.Context;/*** * @author baidu**/
public class LocationService {private LocationClient client = null;private LocationClientOption mOption,DIYoption;private Object  objLock = new Object();/**** * @param locationContext*/public LocationService(Context locationContext){synchronized (objLock) {if(client == null){client = new LocationClient(locationContext);client.setLocOption(getDefaultLocationClientOption());}}}/**** * @param listener* @return*/public boolean registerListener(BDLocationListener listener){boolean isSuccess = false;if(listener != null){client.registerLocationListener(listener);isSuccess = true;}return  isSuccess;}public void unregisterListener(BDLocationListener listener){if(listener != null){client.unRegisterLocationListener(listener);}}/**** * @param option* @return isSuccessSetOption*/public boolean setLocationOption(LocationClientOption option){boolean isSuccess = false;if(option != null){if(client.isStarted())client.stop();DIYoption = option;client.setLocOption(option);}return isSuccess;}public LocationClientOption getOption(){return DIYoption;}/**** * @return DefaultLocationClientOption*/public LocationClientOption getDefaultLocationClientOption(){if(mOption == null){mOption = new LocationClientOption();mOption.setLocationMode(LocationMode.Hight_Accuracy);//可选，默认高精度，设置定位模式，高精度，低功耗，仅设备mOption.setCoorType("bd09ll");//可选，默认gcj02，设置返回的定位结果坐标系，如果配合百度地图使用，建议设置为bd09ll;mOption.setScanSpan(3000);//可选，默认0，即仅定位一次，设置发起定位请求的间隔需要大于等于1000ms才是有效的mOption.setIsNeedAddress(true);//可选，设置是否需要地址信息，默认不需要mOption.setIsNeedLocationDescribe(true);//可选，设置是否需要地址描述mOption.setNeedDeviceDirect(false);//可选，设置是否需要设备方向结果mOption.setLocationNotify(false);//可选，默认false，设置是否当gps有效时按照1S1次频率输出GPS结果mOption.setIgnoreKillProcess(true);//可选，默认true，定位SDK内部是一个SERVICE，并放到了独立进程，设置是否在stop的时候杀死这个进程，默认不杀死   mOption.setIsNeedLocationDescribe(true);//可选，默认false，设置是否需要位置语义化结果，可以在BDLocation.getLocationDescribe里得到，结果类似于“在北京天安门附近”mOption.setIsNeedLocationPoiList(true);//可选，默认false，设置是否需要POI结果，可以在BDLocation.getPoiList里得到mOption.SetIgnoreCacheException(false);//可选，默认false，设置是否收集CRASH信息，默认收集}return mOption;}public void start(){synchronized (objLock) {if(client != null && !client.isStarted()){client.start();}}}public void stop(){synchronized (objLock) {if(client != null && client.isStarted()){client.stop();}}}}

MainActivity实现

package com.zj.mapdemo;import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.Poi;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapStatus;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.model.LatLng;import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;/**** 单点定位示例，用来展示基本的定位结果，配置在LocationService.java中* 默认配置也可以在LocationService中修改* 默认配置的内容自于开发者论坛中对开发者长期提出的疑问内容* * @author baidu**/
public class MainActivity extends Activity {private LocationService locationService;private TextView LocationResult;private Button startLocation;double p1,p2;MapView mapView;BaiduMap mBaiduMap;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);// -----------demo view config ------------SDKInitializer.initialize(getApplicationContext());setContentView(R.layout.location);LocationResult = (TextView) findViewById(R.id.textView1);LocationResult.setMovementMethod(ScrollingMovementMethod.getInstance());startLocation = (Button) findViewById(R.id.addfence);mapView=(MapView) findViewById(R.id.id_bmapView2);mBaiduMap=mapView.getMap();startLocation.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmove(); }});}public void change(){//设定中心点坐标 LatLng cenpt =  new LatLng(30.663791,110.07281);  //定义地图状态 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定义MapStatusUpdate对象，以便描述地图状态将要发生的变化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改变地图状态 mBaiduMap.setMapStatus(mMapStatusUpdate);}/*** 显示请求字符串* * @param str*/public void logMsg(String str) {try {if (LocationResult != null)LocationResult.setText(str);} catch (Exception e) {e.printStackTrace();}}public void move(){// -----------location config ------------locationService = ((LocationApplication) getApplication()).locationService; //获取locationservice实例，建议应用中只初始化1个location实例，然后使用，可以参考其他示例的activity，都是通过此种方式获取locationservice实例的locationService.registerListener(mListener);//注册监听int type = getIntent().getIntExtra("from", 0);if (type == 0) {locationService.setLocationOption(locationService.getDefaultLocationClientOption());} else if (type == 1) {locationService.setLocationOption(locationService.getOption());}locationService.start();// 定位SDK// start之后会默认发起一次定位请求，开发者无须判断isstart并主动调用requeststartLocation.setText(getString(R.string.stoplocation));Log.i("location",p1+"");if(p1>0){Log.i("location",p2+"");//设定中心点坐标 LatLng cenpt =  new LatLng(30,30);  //定义地图状态 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定义MapStatusUpdate对象，以便描述地图状态将要发生的变化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改变地图状态 mBaiduMap.setMapStatus(mMapStatusUpdate);}}Handler handler=new Handler(){public void handleMessage(android.os.Message msg) {Log.i("location",p2+"-------------------+");//设定中心点坐标 LatLng cenpt =  new LatLng(p1,p2);  //定义地图状态 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定义MapStatusUpdate对象，以便描述地图状态将要发生的变化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改变地图状态 mBaiduMap.setMapStatus(mMapStatusUpdate);}};/**** Stop location service*/@Overrideprotected void onStop() {// TODO Auto-generated method stublocationService.unregisterListener(mListener); //注销掉监听locationService.stop(); //停止定位服务super.onStop();}/*@Overrideprotected void onStart() {// TODO Auto-generated method stubsuper.onStart();// -----------location config ------------locationService = ((LocationApplication) getApplication()).locationService; //获取locationservice实例，建议应用中只初始化1个location实例，然后使用，可以参考其他示例的activity，都是通过此种方式获取locationservice实例的locationService.registerListener(mListener);//注册监听int type = getIntent().getIntExtra("from", 0);if (type == 0) {locationService.setLocationOption(locationService.getDefaultLocationClientOption());} else if (type == 1) {locationService.setLocationOption(locationService.getOption());}startLocation.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (startLocation.getText().toString().equals(getString(R.string.startlocation))) {locationService.start();// 定位SDK// start之后会默认发起一次定位请求，开发者无须判断isstart并主动调用requeststartLocation.setText(getString(R.string.stoplocation));//设定中心点坐标 LatLng cenpt =  new LatLng(30,30);  //定义地图状态 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定义MapStatusUpdate对象，以便描述地图状态将要发生的变化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改变地图状态 mBaiduMap.setMapStatus(mMapStatusUpdate);} else {locationService.stop();startLocation.setText(getString(R.string.startlocation));}}});}*//****** @see copy funtion to you project* 定位结果回调，重写onReceiveLocation方法，可以直接拷贝如下代码到自己工程中修改**/private BDLocationListener mListener = new BDLocationListener() {@Overridepublic void onReceiveLocation(BDLocation location) {// TODO Auto-generated method stubif (null != location && location.getLocType() != BDLocation.TypeServerError) {StringBuffer sb = new StringBuffer(256);sb.append("time : ");/*** 时间也可以使用systemClock.elapsedRealtime()方法 获取的是自从开机以来，每次回调的时间；* location.getTime() 是指服务端出本次结果的时间，如果位置不发生变化，则时间不变*/sb.append(location.getTime());sb.append("\nerror code : ");sb.append(location.getLocType());sb.append("\nlatitude : ");sb.append(location.getLatitude());p1=location.getLatitude();Log.i("location", location.getLatitude()+"p1======="+p1);sb.append("\nlontitude : ");sb.append(location.getLongitude());Log.i("location", location.getLongitude()+"");p2=location.getLongitude();handler.sendEmptyMessage(0);sb.append("\nradius : ");sb.append(location.getRadius());sb.append("\nCountryCode : ");sb.append(location.getCountryCode());sb.append("\nCountry : ");sb.append(location.getCountry());sb.append("\ncitycode : ");sb.append(location.getCityCode());sb.append("\ncity : ");sb.append(location.getCity());sb.append("\nDistrict : ");sb.append(location.getDistrict());sb.append("\nStreet : ");sb.append(location.getStreet());sb.append("\naddr : ");sb.append(location.getAddrStr());sb.append("\nDescribe: ");sb.append(location.getLocationDescribe());sb.append("\nDirection(not all devices have value): ");sb.append(location.getDirection());sb.append("\nPoi: ");if (location.getPoiList() != null && !location.getPoiList().isEmpty()) {for (int i = 0; i < location.getPoiList().size(); i++) {Poi poi = (Poi) location.getPoiList().get(i);sb.append(poi.getName() + ";");}}if (location.getLocType() == BDLocation.TypeGpsLocation) {// GPS定位结果sb.append("\nspeed : ");sb.append(location.getSpeed());// 单位：km/hsb.append("\nsatellite : ");sb.append(location.getSatelliteNumber());sb.append("\nheight : ");sb.append(location.getAltitude());// 单位：米sb.append("\ndescribe : ");sb.append("gps定位成功");} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {// 网络定位结果// 运营商信息sb.append("\noperationers : ");sb.append(location.getOperators());sb.append("\ndescribe : ");sb.append("网络定位成功");} else if (location.getLocType() == BDLocation.TypeOffLineLocation) {// 离线定位结果sb.append("\ndescribe : ");sb.append("离线定位成功，离线定位结果也是有效的");} else if (location.getLocType() == BDLocation.TypeServerError) {sb.append("\ndescribe : ");sb.append("服务端网络定位失败，可以反馈IMEI号和大体定位时间到loc-bugs@baidu.com，会有人追查原因");} else if (location.getLocType() == BDLocation.TypeNetWorkException) {sb.append("\ndescribe : ");sb.append("网络不同导致定位失败，请检查网络是否通畅");} else if (location.getLocType() == BDLocation.TypeCriteriaException) {sb.append("\ndescribe : ");sb.append("无法获取有效定位依据导致定位失败，一般是由于手机的原因，处于飞行模式下一般会造成这种结果，可以试着重启手机");}logMsg(sb.toString());}}};
}

主要思路是先利用百度提供的例子得到当前经纬度，然后handler发送消息，接收消息后当前地图中心平移到当前位置

注意，百度地图版本较多，以官方例子为准，不然会出很多BUG

效果如下