百度地图之十经纬度和地址的转换

经纬度和地址的转换

在实际开发中,我们会根据地理坐标查询地址信息(包含经度和纬度)

我们可以使用geocode返回结果在MKSearchListener里的onGetAddrResult方法

reverseGeocode返回结果在MKSearchListener里的onGetAddrResult方法

根据关键词查询所在的位置

综合实战案例：经纬度以及根据关键字查询

package com.android.android_baidu_reversemap;

import java.util.ArrayList;
import java.util.List;

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.ItemizedOverlay;
import com.baidu.mapapi.MKAddrInfo;
import com.baidu.mapapi.MKBusLineResult;
import com.baidu.mapapi.MKDrivingRouteResult;
import com.baidu.mapapi.MKGeneralListener;
import com.baidu.mapapi.MKPlanNode;
import com.baidu.mapapi.MKPoiResult;
import com.baidu.mapapi.MKSearch;
import com.baidu.mapapi.MKSearchListener;
import com.baidu.mapapi.MKSuggestionResult;
import com.baidu.mapapi.MKTransitRouteResult;
import com.baidu.mapapi.MKWalkingRouteResult;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.OverlayItem;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends MapActivity implements OnClickListener{

    // 添加百度地图的相关控件
    private MapView mapView;
    // 加载地图的引擎
    private BMapManager bMapManager;
    // 百度地图的key
    private String KeyString = "8C426377B3526B6BF3672C9BA3BB544D1E8289CD";
    // 用于位置检索、周边检索、范围检索、公交检索、驾乘检索、步行检索等
    private MKSearch mkSearch;
    
    //定义一个起始点,终点
    private MKPlanNode start;
    private MKPlanNode end;
    
    private Button button1,button2;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mapView = (MapView) this.findViewById(R.id.bmapView);
        button1 = (Button) this.findViewById(R.id.reverseCode);
        button1.setOnClickListener(this);
        button2 = (Button) this.findViewById(R.id.geocode);
        button2.setOnClickListener(this);
        bMapManager = new BMapManager(MainActivity.this);
        // 必须要加载key
        bMapManager.init(KeyString, new MKGeneralListener() {

            public void onGetPermissionState(int arg0) {
                
            }

            public void onGetNetworkState(int arg0) {
                if (arg0 == 300) {
                    Toast.makeText(MainActivity.this, "输入的key有错，请核实！！", 1).show();
                }
            }
        });
        bMapManager.start();
        this.initMapActivity(bMapManager);
        mapView.setBuiltInZoomControls(true);
        
        
        //实例化地图的查询类
        mkSearch = new MKSearch();
        mkSearch.init(bMapManager, new MySearchListener());
        //给起始点构建一个坐标
        start = new MKPlanNode();
        start.pt = new GeoPoint((int)(39.915*1E6),(int)(116.404*1E6));
        end = new MKPlanNode();
        end.pt = new GeoPoint(40057031,116307852);
        //mkSearch.transitSearch("北京", start, end);
        

    }
    
    public class OverItemT extends ItemizedOverlay<OverlayItem>{

        //可以从服务器端 接受一组经纬度标注在地图上
        private List<OverlayItem> list = new ArrayList<OverlayItem>();
        public OverItemT(Drawable marker,Context context,GeoPoint geoPoint,String title) {
            super(boundCenterBottom(marker));
            // TODO Auto-generated constructor stub
            list.add(new OverlayItem(geoPoint, title, null));
            populate();
        }

        @Override
        protected OverlayItem createItem(int arg0) {
            // TODO Auto-generated method stub
            return list.get(arg0);
        }

        @Override
        public int size() {
            // TODO Auto-generated method stub
            return list.size();
        }
        
    }

    public class MySearchListener implements MKSearchListener {

        public void onGetAddrResult(MKAddrInfo res, int error) {
            // TODO Auto-generated method stub
            if(error!=0){
                String msg = String.format("错误号:%d",error);
                Toast.makeText(MainActivity.this, msg, 1).show();
                return;
            }
            mapView.getController().animateTo(res.geoPt);
            String msg = String.format("纬度:%f  经度:%f\r\n", res.geoPt.getLatitudeE6()/1e6,res.geoPt.getLongitudeE6()/1e6);
            Drawable drawable = getResources().getDrawable(R.drawable.icon_marka);
            //让图片直接标注在地图上，设置图片的位置
            drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
            mapView.getOverlays().clear();
            //创建一个图层 
            //mapView.getOverlays().add();
        }

        public void onGetBusDetailResult(MKBusLineResult arg0, int arg1) {
            // TODO Auto-generated method stub

        }

        public void onGetDrivingRouteResult(MKDrivingRouteResult arg0, int arg1) {
            // TODO Auto-generated method stub
        }

        public void onGetPoiResult(MKPoiResult result, int type, int iError) {
            // TODO Auto-generated method stub
            if(result==null||iError!=0){
                Toast.makeText(MainActivity.this,"解析失败", 1).show();
                return;
            }
            //查询的点数大于0,表示查找到
            if(result!=null&&result.getCurrentNumPois()>0){
                GeoPoint geoPoint = result.getAllPoi().get(0).pt;
                //将查找到的点标注在地图上
                mapView.getController().animateTo(geoPoint);
                //从GeoPoint中取出经纬度转换
                String msg = String.format("纬度:%f 经度:%f\f\n", geoPoint.getLatitudeE6()/1e6,geoPoint.getLongitudeE6()/1e6);
                msg+="\r\n附近有:";
                for(int i=0;i<result.getAllPoi().size();i++){
                    msg+=(result.getAllPoi().get(i).name+";");
                }
                Toast.makeText(MainActivity.this, msg, 1).show();
            }
        }

        public void onGetRGCShareUrlResult(String arg0, int arg1) {
            // TODO Auto-generated method stub

        }

        public void onGetSuggestionResult(MKSuggestionResult arg0, int arg1) {
            // TODO Auto-generated method stub

        }

        public void onGetTransitRouteResult(MKTransitRouteResult arg0, int arg1) {
            // TODO Auto-generated method stub
        }

        public void onGetWalkingRouteResult(MKWalkingRouteResult arg0, int arg1) {
            // TODO Auto-generated method stub
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (bMapManager != null) {
            bMapManager.destroy();
            bMapManager = null;
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (bMapManager != null) {
            bMapManager.start();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (bMapManager != null) {
            bMapManager.stop();
        }
    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }

    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.reverseCode:
            GeoPoint geoPoint = new GeoPoint(39904965,116327764);
            mkSearch.reverseGeocode(geoPoint);
            break;
        case R.id.geocode:
            //查询所在的省市 
            EditText city = (EditText) this.findViewById(R.id.city);
            //查询所在的地址
            EditText geocodekey = (EditText) this.findViewById(R.id.geocodekey);
            mkSearch.geocode(city.getText().toString(), geocodekey.getText().toString());
            break;
        default:
            break;
        }
    }

}