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。