【android】使用百度api获得你的地址

采用百度开放平台的api对自己位置的定位的好处有很多。
1，完全不需要你做任何事情。程序自动给调用。
2，稳定。流量少。之前做的有些程序是从网络上抓取自己的ip地址来进行定位。
而百度的这个，返回一些你位置的基本信息。
一下就是代码：
基础类，这个类保存个人位置信息。

package com.duduli.li;

public class Addr {
	private String time;
	private String error;
	private String pointX;
	private String PointY;
	private String radius;
	private String addr;
	public String getTime() {
		return time;
	}
	public void setTime(String time) {
		this.time = time;
	}
	public String getPointX() {
		return pointX;
	}
	public void setPointX(String pointX) {
		this.pointX = pointX;
	}
	public String getPointY() {
		return PointY;
	}
	public void setPointY(String pointY) {
		PointY = pointY;
	}
	public String getError() {
		return error;
	}
	public void setError(String error) {
		this.error = error;
	}
	public String getRadius() {
		return radius;
	}
	public void setRadius(String radius) {
		this.radius = radius;
	}
	public String getAddr() {
		return addr;
	}
	public void setAddr(String addr) {
		this.addr = addr;
	}
}

第二个为百度返回json的解析类，将获得的信息解析到基础类中进行保存。

package com.duduli.li;

import org.json.JSONException;
import org.json.JSONObject;

public class JsonParse {
	
	public Addr parseJson(String json) throws JSONException{
		
		Addr addrMsg = new Addr();
		JSONObject jo = new JSONObject(json);
//		解析json中的result值
		String result = jo.getString("result");
		JSONObject resultJO = new JSONObject(result);
		String time = resultJO.getString("time");
		String error = resultJO.getString("error");
		addrMsg.setTime(time);
		addrMsg.setError(error);
		
//		解析json中的content值
		String content = jo.getString("content");
		JSONObject contentJO = new JSONObject(content);
		String point = contentJO.getString("point");
		
//		解析json中point数据
		JSONObject pointJO = new JSONObject(point);
		String x = pointJO.getString("x");
		String y = pointJO.getString("y");
		addrMsg.setPointX(x);
		addrMsg.setPointY(y);
		
		
		String radius = contentJO.getString("radius");
		addrMsg.setRadius(radius);
		
		
//		解析json中add数据
		String addr = contentJO.getString("addr");
		JSONObject addrJO = new JSONObject(addr);
		
		String detail = addrJO.getString("detail");
		addrMsg.setAddr(detail);
		
		return addrMsg;
	}
}

第三个为layout的main.xml

    <com.baidu.mapapi.MapView android:id="@+id/bmapsView"
		android:layout_width="fill_parent" android:layout_height="fill_parent"
		android:clickable="true" />

最后是activity。可以显示地图和定位的。

package com.duduli.li;

import org.json.JSONException;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.Bundle;

import com.baidu.location.LocServiceMode;
import com.baidu.location.LocationChangedListener;
import com.baidu.location.LocationClient;
import com.baidu.location.ReceiveListener;
import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.Overlay;

public class BaiduMapTestActivity extends MapActivity {
	private LocationClient lc ;
	private BMapManager mBMapMan;
	private MapView mMapView;
	private double x;
	private double y;
//	private GeoPoint gp;
	
	@Override
	protected void onCreate(Bundle arg0) {
		// TODO Auto-generated method stub
		super.onCreate(arg0);
		setContentView(R.layout.main);
		
		mBMapMan = new BMapManager(getApplication());
		mBMapMan.init("279B8BABF0AA0A98B33A494C9E310BBB10137789", null);
		super.initMapActivity(mBMapMan);
		
		lc = new LocationClient(this);
        lc.setCoorType("gcj02");
        lc.setServiceMode(LocServiceMode.Background);
        lc.addLocationChangedlistener(new MyLocationChangedListener());
        lc.addRecerveListener(new MyReceiveListenner());
        lc.start();
        
        try {
			Thread.sleep(3000);
		} catch (InterruptedException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		lc.getLocation();
	}

	@Override
	protected boolean isRouteDisplayed() {
		// TODO Auto-generated method stub
		return false;
	}

	
	
	public class MyLocationChangedListener implements LocationChangedListener {
        public void onLocationChanged() {
            //在此添加，位置改变触发的功能。
//        	tv.append(text)
        }
    }
    
    
    public class MyReceiveListenner implements ReceiveListener{
        public void onReceive(String strData) {
            //在此处理 获取到的定位结果的json串。
        	
            try {
    			JsonParse jp = new JsonParse();
    			Addr ad = jp.parseJson(strData);
//    			x = getPoint(ad.getPointX());//114.105
//    			y = getPoint(ad.getPointY());//22.54
    			
    			x = Double.valueOf(ad.getPointX());
    			y = Double.valueOf(ad.getPointY());

    			mMapView = (MapView) findViewById(R.id.bmapsView);
    			
    			mMapView.setBuiltInZoomControls(true);
    			mMapView.getOverlays().add(new MyOverlay());
    			
    			MapController mc  = mMapView.getController();
    			
    			GeoPoint gp = new GeoPoint((int)(y*1E6),(int)(x*1E6));
//    			GeoPoint gp = new GeoPoint((int)(22.54762429*1E6),(int)(114.1054699*1E6));
    			mc.setCenter(gp);
    			mc.setZoom(12);
    			
    			
    			mBMapMan.start();
    			
    		} catch (JSONException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
        }
        
       /* public int getPoint(String s){
        	String str = s.substring(0, s.indexOf("."))+s.substring(s.indexOf(".")+1, s.indexOf(".")+7);
        	return Integer.valueOf(str);
        }*/
        
    }
    
    
    public class MyOverlay extends Overlay {
        GeoPoint geoPoint = new GeoPoint((int)(y*1E6),(int)(x*1E6));
        Paint paint = new Paint();
     
        @Override
        public void draw(Canvas canvas, MapView mapView, boolean shadow) {
            
            Point point = mMapView.getProjection().toPixels(geoPoint, null);
            Bitmap bmp = BitmapFactory.decodeResource(getResources(),android.R.drawable.presence_online);
            canvas.drawBitmap(bmp,point.x, point.y,paint);
            canvas.drawText("你在这里", point.x, point.y, paint);
        }
    }
}

最后还有权限：

<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.ACCESS_FINE_LOCATION"></uses-permission>
	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
	<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
	<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
	<uses-permission android:name="android.permission.INTERNET"></uses-permission>
	<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>