Android百度地图开发之显示当前位置地图

朴灿烈づ我的快乐病毒、 2022-09-23 11:57 291阅读 0赞

### 步骤： ###

1、获取当前的经纬度  
2、显示地图  
3、改变地图中心的经纬度

--------------------

1、获取当前的经纬度  
请参考网址：  
[http://blog.csdn.net/zhengyikuangge/article/details/51921549][http_blog.csdn.net_zhengyikuangge_article_details_51921549]

--------------------

2、显示地图  
请参考网址：  
[http://blog.csdn.net/zhengyikuangge/article/details/51945053][http_blog.csdn.net_zhengyikuangge_article_details_51945053]

--------------------

3、改变地图中心的经纬度：  
前台xml代码：

......
    <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>
    ......

--------------------

后台参考代码（只提供java代码，其他代码与第2个网址中的相同）：

package com.example.baidumaptest;
    
    import java.util.List;
    
    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.MyLocationData;
    import com.baidu.mapapi.model.LatLng;
    
    public class MainActivity extends Activity {
        
        private LocationManager locationManager;
        private String provider;
        MapView mapView;
        BaiduMap baiduMap;
        boolean ifFrist = 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);
            // 获取baiduMap对象
            baiduMap = mapView.getMap();
            // 设置可改变地图位置
            baiduMap.setMyLocationEnabled(true);
            locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
            List<String> list = locationManager.getProviders(true);
            if (list.contains(LocationManager.GPS_PROVIDER)) {
                provider = LocationManager.GPS_PROVIDER;
            } else if (list.contains(LocationManager.NETWORK_PROVIDER)) {
                provider = LocationManager.NETWORK_PROVIDER;
    
            } else {
                Toast.makeText(this, "当前不能提供位置信息", Toast.LENGTH_LONG).show();
                return;
            }
            Location location = locationManager.getLastKnownLocation(provider);
            if (location != null) {
                navigateTo(location);
            }
            locationManager.requestLocationUpdates(provider, 5000, 1,
                    locationListener);
    
        }
    
        private void navigateTo(Location location) {
            // 按照经纬度确定地图位置
            if (ifFrist) {
                LatLng ll = new LatLng(location.getLatitude(),
                        location.getLongitude());
                MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(ll);
                // 移动到某经纬度
                baiduMap.animateMapStatus(update);
                update = MapStatusUpdateFactory.zoomBy(5f);
                // 放大
                baiduMap.animateMapStatus(update);
    
                ifFrist = false;
            }
            // 显示个人位置图标
            MyLocationData.Builder builder = new MyLocationData.Builder();
            builder.latitude(location.getLatitude());
            builder.longitude(location.getLongitude());
            MyLocationData data = builder.build();
            baiduMap.setMyLocationData(data);
        }
    
        LocationListener locationListener = new LocationListener() {
    
            @Override
            public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
                // TODO Auto-generated method stub
    
            }
    
            @Override
            public void onProviderEnabled(String arg0) {
                // TODO Auto-generated method stub
    
            }
    
            @Override
            public void onProviderDisabled(String arg0) {
                // TODO Auto-generated method stub
    
            }
    
            @Override
            public void onLocationChanged(Location arg0) {
                // TODO Auto-generated method stub
                // 位置改变则重新定位并显示地图
                navigateTo(arg0);
            }
        };
    
        @Override
        protected void onDestroy() {
            // 释放资源
            super.onDestroy();
            if (locationManager != null) {
                locationManager.removeUpdates(locationListener);
            }
    
            mapView.onDestroy();
    
            baiduMap.setMyLocationEnabled(false);
    
        }
    
    }

--------------------

参考代码下载地址：  
[http://download.csdn.net/detail/zhengyikuangge/9579595][http_download.csdn.net_detail_zhengyikuangge_9579595]

[http_blog.csdn.net_zhengyikuangge_article_details_51921549]: http://blog.csdn.net/zhengyikuangge/article/details/51921549
[http_blog.csdn.net_zhengyikuangge_article_details_51945053]: http://blog.csdn.net/zhengyikuangge/article/details/51945053
[http_download.csdn.net_detail_zhengyikuangge_9579595]: http://download.csdn.net/detail/zhengyikuangge/9579595