实验6：Android地图定位-百度地图上定位自己所在的位置

来源：互联网发布：怎样创建企业域名编辑：程序博客网时间：2024/06/11 17:48

主要的比较麻烦的地方是出在jar，so文件的导入与LocationManager的使用

效果图：

源码：

MainActivity:

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
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.MyLocationData;
import com.baidu.mapapi.model.LatLng;
import java.util.List;
public class MainActivity extends Activity {
private MapView mapView;
private BaiduMap baiduMap;
private LocationManager locationManager;
private String provider;
private boolean isFirstLocate =true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
mapView = (MapView) findViewById(R.id.map_view);
baiduMap=mapView.getMap();
//设置位置提供器
setLovationManager();
//将显示位置的功能开启
baiduMap.setMyLocationEnabled(true);
}
private void setLovationManager() {
locationManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
//获取所有可用的位置提供器
List<String> providerList=locationManager.getProviders(true);
if(providerList.contains(LocationManager.GPS_PROVIDER)){
provider=LocationManager.GPS_PROVIDER;
}else if(providerList.contains(LocationManager.NETWORK_PROVIDER)){
provider=LocationManager.NETWORK_PROVIDER;
}else {
//当前没有可用的位置提供器时，弹出Toast提示
Toast.makeText(this,"没有可用的位置提供器",Toast.LENGTH_SHORT).show();
return;
}
Location location=locationManager.getLastKnownLocation(provider);
if(location!=null){
navigateTo(location);
}
locationManager.requestLocationUpdates(provider,5000,5,locationListener);
}
private void navigateTo(Location location) {
//如果是第一次创建，就获取位置信息并且将地图移到当前位置
//为防止地图被反复移动，所以就只在第一次创建时执行
if(isFirstLocate){
//LatLng对象主要用来存放经纬度
//zoomTo是用来设置百度地图的缩放级别，范围为3~19，数值越大越精确
LatLng ll=new LatLng(location.getLatitude(),location.getLongitude());
MapStatusUpdate update= MapStatusUpdateFactory.newLatLng(ll);
baiduMap.animateMapStatus(update);
update=MapStatusUpdateFactory.zoomTo(16f);
baiduMap.animateMapStatus(update);
isFirstLocate=false;
}
//封装设备当前位置并且显示在地图上
//由于设备在地图上显示的位置会根据我们当前位置而改变，所以写到if外面
MyLocationData.Builder locationBuilder=new MyLocationData.Builder();
locationBuilder.latitude(location.getLatitude());
locationBuilder.longitude(location.getLongitude());
MyLocationData locationData=locationBuilder.build();
baiduMap.setMyLocationData(locationData);
}
LocationListener locationListener =new LocationListener() {
@Override
public void onLocationChanged(Location location) {
if(locationManager!=null)
navigateTo(location);
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
};
@Override
protected void onDestroy() {
super.onDestroy();
//最后要销毁mapView
//关闭程序时将监听器移除
//关闭可以显示位置的功能
mapView.onDestroy();
if(locationManager!=null){
locationManager.removeUpdates(locationListener);
}
baiduMap.setMyLocationEnabled(false);
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
}

activity_main:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
>
<com.baidu.mapapi.map.MapView
android:id="@+id/map_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true">
</com.baidu.mapapi.map.MapView>
</LinearLayout>

Androidmanifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.baidumaptest2">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data
android:name="com.baidu.lbsapi.API_KEY"
android:value="lPdICf3mOjPpwXsUzv8Omgec"/>
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
//以下为权限设置
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
<permission android:name="android.permission.BAIDU_LOCATION_SERVICE" >
</permission>
<uses-permission android:name="android.permission.BAIDU_LOCATION_SERVICE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" >
</uses-permission>
<uses-permission android:name="android.permission.INTERNET" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" >
</uses-permission>
<uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
<uses-permission android:name="android.permission.WAKE_LOCK" >
</uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.CAMERA" >
</uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO" >
</uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >
</uses-permission>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.BROADCAST_STICKY" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" >
</uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
</manifest>

总结

通过查找资料以及网上搜索最终初步掌握了地图定位技术

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