百度地图开发之定位

雨点打透心脏的1/2处 2022-07-29 11:50 363阅读 0赞

### 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][Android _ SDK v3.0.0 _ - Hongyang - _ - 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][SDK_SDK_ - Singleton1900_ - _ - 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());
                }
            }
    
        };
    }

### 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 ###

![这里写图片描述][20160416213354361]

[Android _ SDK v3.0.0 _ - Hongyang - _ - CSDN.NET]: http://blog.csdn.net/lmj623565791/article/details/37729091
[SDK_SDK_ - Singleton1900_ - _ - CSDN.NET]: http://blog.csdn.net/singleton1900/article/details/42555113
[-]: http://www.oschina.net/question/1389206_158886?fromerr=8bA6r3Xf
[20160416213354361]: /images/20220724/672eafdfe93340bbbfb77be233b2bca2.png