[Android百度地图SDK开发] （二）地图交互之定位

[Android百度地图SDK开发] （二）地图交互之定位

这一篇主要说下如何定位并且地图自动移动到当前位置

在上一篇博文中/article/1819778.html已经说了如何配置环境与第一次运行，*由于上一篇博文中下载的是单一的百度地图SDK，这次我们需要用定位相关，但是百度地图SDK是不包含定位相关的，所以还要下载定位的SDK…

为了以后的开发方便大家最好在下载SDK的时候进到选择界面把未来可能要用到的功能都勾选上，然后点击开发包进行下载，下载地址 http://lbsyun.baidu.com/sdk/download?selected=location




这样解压后，就会获得一个完整的开发SDK



把armeabi和BaiduLBS_android.jar直接放到libs就OK了



进入主题：

关于定位的核心代码

a.定位的初始化

// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);
// 定位初始化
mLocClient = new LocationClient(this);
//设置监听
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);
//开始定位
mLocClient.start();

b.定位监听的实现

public class MyLocationListenner implements BDLocationListener {

        @Override
public void onReceiveLocation(BDLocation location) {
            //保存当前位置
    doublex=location.getLatitude();
    doubley=location.getLongitude();

            // map view 销毁后不在处理新接收的位置
    if (location == null || mMapView == null)
                return;
                // 构造定位数据  
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);
    //如果是第一次定位需要把地图移动到当前点
            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) {
        }
    }

c.更换定位点图标

mCurrentMarker = BitmapDescriptorFactory.fromResource(R.drawable.icon_geo);
mBaiduMap.setMyLocationConfigeration(new MyLocationConfiguration(mCurrentMode, true, mCurrentMarker));

d.更换定位模式

定位有四种模式，普通 跟随 罗盘，具体效果自己实践 : )

//跟随模式
mCurrentMode = LocationMode.FOLLOWING;
mBaiduMap.setMyLocationConfigeration(new MyLocationConfiguration(mCurrentMode, true, mCurrentMarker));

本例详细源码：

activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.baidu.mapapi.map.MapView
        android:id="@+id/bmapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clickable="true" />

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_marginTop="80dp"
        android:minWidth="100dp"
        android:orientation="vertical"
        android:padding="2dp" >

        <RadioGroup
            android:id="@+id/radioGroup"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="定位icon" >

            <RadioButton
                android:id="@+id/defaulticon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:checked="true"
                android:text="默认图标" >
            </RadioButton>

            <RadioButton
                android:id="@+id/customicon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="自定义图标" >
            </RadioButton>
        </RadioGroup>
    </LinearLayout>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="25dp"
        android:layout_marginTop="10dp" />

    <Button
        android:id="@+id/button2"
        android:onClick="reLocation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/linearLayout1"
        android:text="定位" />

</RelativeLayout>

MyApplication.java

package com.lijizhou.locationdemo;

import com.baidu.mapapi.SDKInitializer;

import android.app.Application;

public class MyApplication extends Application{

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();

         //初始化 SDK引用的Context
         SDKInitializer.initialize(getApplicationContext());
    }
}

MainActivity.java

package com.lijizhou.locationdemo;

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;

public class MainActivity extends Activity {
        // 定位相关
        LocationClient mLocClient;
        public MyLocationListenner myListener = new MyLocationListenner();
        private LocationMode mCurrentMode;
        BitmapDescriptor mCurrentMarker;

        MapView mMapView;
        BaiduMap mBaiduMap;
        //保存当前位置点
        double doublex;
        double doubley;

        // UI相关
        OnCheckedChangeListener radioButtonListener;
        Button requestLocButton;
        // 是否首次定位
        boolean isFirstLoc = true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        requestLocButton = (Button) findViewById(R.id.button1);
        //默认定位模式为普通
        mCurrentMode = LocationMode.NORMAL;
        requestLocButton.setText("普通");
        //模式更改点击事件
        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;
                }
            }
        };
        //更换定位点图标
        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);
        //开始定位
        mLocClient.start();
    }

    /**
     * 定位SDK监听函数
     */
    public class MyLocationListenner implements BDLocationListener {

        @Override
        public void onReceiveLocation(BDLocation location) {

            doublex=location.getLatitude();
            doubley=location.getLongitude();

            // 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) {
        }
    }
    //移动地图 点击定位按钮 地图移动回当前点
    public void reLocation(View v){

         LatLng ll = new LatLng(doublex, doubley);  
            MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);  
            mBaiduMap.animateMapStatus(u);  
    }
    @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();
    }
}

Androidmanifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lijizhou.locationdemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="22" />

    <application
        android:allowBackup="true"
         android:name=".MyApplication"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

         <meta-data  
        android:name="com.baidu.lbsapi.API_KEY"  
        android:value="你的KEY" />
        <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>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
</manifest>

运行截图



有什么问题可以在下方评论，感谢。