一个百度定位例子，把自己的经纬度转换为具体位置

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程序：

BaiduMap主包：

package com.xmb.BaiduMap;

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.LocationListener;
import com.baidu.mapapi.MKAddrInfo;
import com.baidu.mapapi.*;
import com.baidu.mapapi.MKDrivingRouteResult;
import com.baidu.mapapi.MKGeneralListener;
import com.baidu.mapapi.MKPoiResult;
import com.baidu.mapapi.MKSearch;
import com.baidu.mapapi.MKSearchListener;

import com.baidu.mapapi.MKTransitRouteResult;
import com.baidu.mapapi.MKWalkingRouteResult;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;






import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class BaiduMap extends Activity {      
     public TextView tv1, tv2;
    public BMapManager mapManager;
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.mylocation);  
        tv1=(TextView)findViewById(R.id.result1);
        tv2 = (TextView) this.findViewById(R.id.result2);
        
        mapManager=new BMapManager(this);
        
        mapManager.init("53351EE4BDE7BD870F41A0B4AF1480F1CA97DAF9", new MyMKGeneralListener());
        
        
        mapManager.getLocationManager().setNoitifyInternal(20, 5);


        mapManager.getLocationManager().requestLocationUpdates(new MyLocationListener());
        
        mapManager.start();
        
        
//      mapManager = new BMapManager(this);
//        mapManager.init("EDB67AD764D300895C95ABA02A4DDC58D5485CCD",
//                new MyMKGeneralListener());
//        // 设置通知间隔:iMaxSecond - 最大通知间隔,单位:秒;iMinSecond - 最小通知间隔,单位:秒
//        mapManager.getLocationManager().setNotifyInternal(20, 5);
//
//        mapManager.getLocationManager().requestLocationUpdates(
//                new MyLocationListener());
//        mapManager.start();
        
    }  
    // 定位自己的位置，只定位一次  
    class MyLocationListener implements LocationListener {

        @Override
        public void onLocationChanged(Location arg0) {
            
            double jindu1 = arg0.getLatitude();
            double weidu1 = arg0.getLongitude();
            
            int jindu = (int) (arg0.getLatitude()*1000000);
            int weidu = (int) (arg0.getLongitude()*1000000);
            tv1.setText("经度：" + jindu1 + ",纬度：" + weidu1);
            System.out.println("经度：" + jindu1 + ",纬度：" + weidu1);
            MKSearch search = new MKSearch();
            search.init(mapManager, new MyMKSearchListener());
            search.reverseGeocode(new GeoPoint(jindu, weidu));
        }

    }

    class MyMKSearchListener implements MKSearchListener {

        @Override
        public void onGetAddrResult(MKAddrInfo arg0, int arg1) {
            if (arg0 == null) {
                tv2.setText("没有获取想要的位置");
            } else {
                GeoPoint point = arg0.geoPt;
                tv2.setText("地址：" + arg0.strAddr + ",坐标："
                        + point.getLatitudeE6() + "," + point.getLongitudeE6());
            }
        }

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

        @Override
        public void onGetPoiResult(MKPoiResult arg0, int arg1, int arg2) {
            // TODO Auto-generated method stub
            
        }

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

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

        

    }

    // 常用事件监听，用来处理通常的网络错误，授权验证错误等
    class MyMKGeneralListener implements MKGeneralListener {

        @Override
        public void onGetNetworkState(int arg0) {

        }

        @Override
        public void onGetPermissionState(int arg0) {

        }

    }
    }

BMapApiDemoApp包：

package com.xmb.BaiduMap;

import android.app.Application;
import android.widget.Toast;

import com.baidu.mapapi.*;

public class BMapApiDemoApp extends Application {
    
    static BMapApiDemoApp mDemoApp;
    
    //百度MapAPI的管理类
    BMapManager mBMapMan = null;    
    // 授权Key
    // TODO: 请输入您的Key,
    // 申请地址：http://dev.baidu.com/wiki/static/imap/key/
    String mStrKey = "53351EE4BDE7BD870F41A0B4AF1480F1CA97DAF9";
    boolean m_bKeyRight = true;    // 授权Key正确，验证通过
    
    // 常用事件监听，用来处理通常的网络错误，授权验证错误等
    static class MyGeneralListener implements MKGeneralListener {
        @Override
        public void onGetNetworkState(int iError) {
            Toast.makeText(BMapApiDemoApp.mDemoApp.getApplicationContext(), "您的网络出错啦！",
                    Toast.LENGTH_LONG).show();
        }

        @Override
        public void onGetPermissionState(int iError) {
            if (iError ==  MKEvent.ERROR_PERMISSION_DENIED) {
                // 授权Key错误：
                Toast.makeText(BMapApiDemoApp.mDemoApp.getApplicationContext(), 
                        "请在BMapApiDemoApp.java文件输入正确的授权Key！",
                        Toast.LENGTH_LONG).show();
                BMapApiDemoApp.mDemoApp.m_bKeyRight = false;
            }
        }        
    }    
    @Override
    public void onCreate() {
        mDemoApp = this;
        mBMapMan = new BMapManager(this);
        mBMapMan.init(this.mStrKey, new MyGeneralListener());
        super.onCreate();
    }
    @Override
    //建议在您app的退出之前调用mapadpi的destroy()函数，避免重复初始化带来的时间消耗
    public void onTerminate() {
        // TODO Auto-generated method stub
        if (mBMapMan != null) {
            mBMapMan.destroy();
            mBMapMan = null;
        }
        super.onTerminate();
    }

}

xml文件就只是一个TextView控件，清单注意加权限的哦