百度地图开发之定位
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;
@Override
public 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;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.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() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
move();
}
});
}
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request
startLocation.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
*/
@Override
protected void onStop() {
// TODO Auto-generated method stub
locationService.unregisterListener(mListener); //注销掉监听
locationService.stop(); //停止定位服务
super.onStop();
}
/*@Override
protected void onStart() {
// TODO Auto-generated method stub
super.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() {
@Override
public 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request
startLocation.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() {
@Override
public void onReceiveLocation(BDLocation location) {
// TODO Auto-generated method stub
if (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/h
sb.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());
}
}
};
}
