百度地图定位

Posted 2021-12-30 可爱的小阿轩

百度地图定位

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作业4

目录

• 百度地图定位
• 要求
• 源代码
• • MainActivity：
  • activity_main:
  • Androidmanifest:
• 界面

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要求

根据官方文档，开发百度地图定位APP，显示出当前位置坐标。

源代码

MainActivity：

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();
        setLovationManager();
        baiduMap.setMyLocationEnabled(true);
    
     private void setLovationManager() 
        locationManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
        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 
            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) 
        if(isFirstLocate)
            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;
        
        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();
        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>
 
    <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.WRITE_APN_SETTINGS"></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" />
    <!-- SDK1.5需要android.permission.GET_TASKS权限判断本程序是否为当前运行的应用? -->
    <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" />
    <!-- 来电消音 -->
    <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>

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界面