本文主要講述利用百度地圖API實現定位功能

第一步:下載SDK與申請KEY

參考鏈接：Android 百度地圖 SDK v3.0.0 （一） - Hongyang - 博客頻道 - CSDN.NET

注意

百度地圖SDK與百度定位SDK已經分開了，如果在工程中同時導入這兩個包，會沖突，解決方法是下載包含這兩個功能的SDK

參考鏈接： 百度地圖SDK和百度導航SDK合并沖突問題 - Singleton1900的專欄 - 博客頻道 - CSDN.NET

代碼實現

將地圖中心點移到指定點實現

//設定中心點坐標 LatLng cenpt = new LatLng(30.663791,104.07281); //定義地圖狀態 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定義MapStatusUpdate對象，以便描述地圖狀態將要發生的變化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改變地圖狀態 mBaiduMap.setMapStatus(mMapStatusUpdate);

參考鏈接：

百度地圖一打開就自動將中心點移動到定位位置 - 開源中國社區

要實現定位功能，得到經緯度

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>

寫Application文件,實例化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的接口說明請參考線上文檔：http://developer.baidu.com/map/loc_refer/index.html** 百度定位SDK官方網站：http://developer.baidu.com/map/index.php?title=android-locsdk* * 直接拷貝com.baidu.location.service包到自己的工程下，簡單配置即可獲取定位結果，也可以根據demo內容自行封裝*/ public class LocationApplication extends Application {public LocationService locationService;public Vibrator mVibrator;@Overridepublic void onCreate() {super.onCreate();/**** 初始化定位sdk，建議在Application中創建*/locationService = new LocationService(getApplicationContext());mVibrator =(Vibrator)getApplicationContext().getSystemService(Service.VIBRATOR_SERVICE);WriteLog.getInstance().init(); // 初始化日志SDKInitializer.initialize(getApplicationContext()); } }

locationService實現

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);//可選，默認高精度，設置定位模式，高精度，低功耗，僅設備mOption.setCoorType("bd09ll");//可選，默認gcj02，設置返回的定位結果坐標系，如果配合百度地圖使用，建議設置為bd09ll;mOption.setScanSpan(3000);//可選，默認0，即僅定位一次，設置發起定位請求的間隔需要大于等于1000ms才是有效的mOption.setIsNeedAddress(true);//可選，設置是否需要地址信息，默認不需要mOption.setIsNeedLocationDescribe(true);//可選，設置是否需要地址描述mOption.setNeedDeviceDirect(false);//可選，設置是否需要設備方向結果mOption.setLocationNotify(false);//可選，默認false，設置是否當gps有效時按照1S1次頻率輸出GPS結果mOption.setIgnoreKillProcess(true);//可選，默認true，定位SDK內部是一個SERVICE，并放到了獨立進程，設置是否在stop的時候殺死這個進程，默認不殺死 mOption.setIsNeedLocationDescribe(true);//可選，默認false，設置是否需要位置語義化結果，可以在BDLocation.getLocationDescribe里得到，結果類似于“在北京天安門附近”mOption.setIsNeedLocationPoiList(true);//可選，默認false，設置是否需要POI結果，可以在BDLocation.getPoiList里得到mOption.SetIgnoreCacheException(false);//可選，默認false，設置是否收集CRASH信息，默認收集}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實現

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;/**** 單點定位示例，用來展示基本的定位結果，配置在LocationService.java中* 默認配置也可以在LocationService中修改* 默認配置的內容自于開發者論壇中對開發者長期提出的疑問內容* * @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(){//設定中心點坐標 LatLng cenpt = new LatLng(30.663791,110.07281); //定義地圖狀態 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定義MapStatusUpdate對象，以便描述地圖狀態將要發生的變化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改變地圖狀態 mBaiduMap.setMapStatus(mMapStatusUpdate);}/*** 顯示請求字符串* * @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; //獲取locationservice實例，建議應用中只初始化1個location實例，然后使用，可以參考其他示例的activity，都是通過此種方式獲取locationservice實例的locationService.registerListener(mListener);//注冊監聽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之后會默認發起一次定位請求，開發者無須判斷isstart并主動調用requeststartLocation.setText(getString(R.string.stoplocation));Log.i("location",p1+"");if(p1>0){Log.i("location",p2+"");//設定中心點坐標 LatLng cenpt = new LatLng(30,30); //定義地圖狀態 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定義MapStatusUpdate對象，以便描述地圖狀態將要發生的變化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改變地圖狀態 mBaiduMap.setMapStatus(mMapStatusUpdate);}}Handler handler=new Handler(){public void handleMessage(android.os.Message msg) {Log.i("location",p2+"-------------------+");//設定中心點坐標 LatLng cenpt = new LatLng(p1,p2); //定義地圖狀態 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定義MapStatusUpdate對象，以便描述地圖狀態將要發生的變化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改變地圖狀態 mBaiduMap.setMapStatus(mMapStatusUpdate);}};/**** Stop location service*/@Overrideprotected void onStop() {// TODO Auto-generated method stublocationService.unregisterListener(mListener); //注銷掉監聽locationService.stop(); //停止定位服務super.onStop();}/*@Overrideprotected void onStart() {// TODO Auto-generated method stubsuper.onStart();// -----------location config ------------locationService = ((LocationApplication) getApplication()).locationService; //獲取locationservice實例，建議應用中只初始化1個location實例，然后使用，可以參考其他示例的activity，都是通過此種方式獲取locationservice實例的locationService.registerListener(mListener);//注冊監聽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之后會默認發起一次定位請求，開發者無須判斷isstart并主動調用requeststartLocation.setText(getString(R.string.stoplocation));//設定中心點坐標 LatLng cenpt = new LatLng(30,30); //定義地圖狀態 MapStatus mMapStatus = new MapStatus.Builder() .target(cenpt) .zoom(12) .build(); //定義MapStatusUpdate對象，以便描述地圖狀態將要發生的變化 MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.newMapStatus(mMapStatus); //改變地圖狀態 mBaiduMap.setMapStatus(mMapStatusUpdate);} else {locationService.stop();startLocation.setText(getString(R.string.startlocation));}}});}*//****** @see copy funtion to you project* 定位結果回調，重寫onReceiveLocation方法，可以直接拷貝如下代碼到自己工程中修改**/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 : ");/*** 時間也可以使用systemClock.elapsedRealtime()方法 獲取的是自從開機以來，每次回調的時間；* location.getTime() 是指服務端出本次結果的時間，如果位置不發生變化，則時間不變*/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定位結果sb.append("\nspeed : ");sb.append(location.getSpeed());// 單位：km/hsb.append("\nsatellite : ");sb.append(location.getSatelliteNumber());sb.append("\nheight : ");sb.append(location.getAltitude());// 單位：米sb.append("\ndescribe : ");sb.append("gps定位成功");} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {// 網絡定位結果// 運營商信息sb.append("\noperationers : ");sb.append(location.getOperators());sb.append("\ndescribe : ");sb.append("網絡定位成功");} else if (location.getLocType() == BDLocation.TypeOffLineLocation) {// 離線定位結果sb.append("\ndescribe : ");sb.append("離線定位成功，離線定位結果也是有效的");} else if (location.getLocType() == BDLocation.TypeServerError) {sb.append("\ndescribe : ");sb.append("服務端網絡定位失敗，可以反饋IMEI號和大體定位時間到loc-bugs@baidu.com，會有人追查原因");} else if (location.getLocType() == BDLocation.TypeNetWorkException) {sb.append("\ndescribe : ");sb.append("網絡不同導致定位失敗，請檢查網絡是否通暢");} else if (location.getLocType() == BDLocation.TypeCriteriaException) {sb.append("\ndescribe : ");sb.append("無法獲取有效定位依據導致定位失敗，一般是由于手機的原因，處于飛行模式下一般會造成這種結果，可以試著重啟手機");}logMsg(sb.toString());}}}; }

主要思路是先利用百度提供的例子得到當前經緯度，然后handler發送消息，接收消息后當前地圖中心平移到當前位置

注意，百度地圖版本較多，以官方例子為準，不然會出很多BUG

效果如下

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