goolge 地图地址位置解析

Java代码package com.android.yibai.antking;
import java.util.ArrayList;import java.util.List;import java.util.Locale;import android.app.AlertDialog;import android.app.Dialog;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Point;import android.location.Address;import android.location.Geocoder;import android.os.Bundle;import com.google.android.maps.GeoPoint;import com.google.android.maps.MapActivity;import com.google.android.maps.MapController;import com.google.android.maps.MapView;import com.google.android.maps.Overlay;import com.google.android.maps.Projection;public class GeocoderMain extends MapActivity{    //地图显示控制相关的变量定义private MapView map = null;private MapController mapCon;private Geocoder geo;private static final int ERROR_DIALOG=1;public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);geo= new Geocoder(this,Locale.CHINA);//获取MapViewmap = (MapView)this.findViewById(R.id.mapview);//设置显示模式//map.setTraffic(false);//map.setSatellite(true);//map.setStreetView(true);//设置可以缩放map.setBuiltInZoomControls(true);List addresses = null;try{addresses = geo.getFromLocationName("日照市万平口", 1);}catch(Exception e){e.printStackTrace();}   if(addresses.size()==0){   showDialog(ERROR_DIALOG);   GeoPoint geoBeijing = new GeoPoint(   39906033,116397700);   mapCon = map.getController();   mapCon.setCenter(geoBeijing);   mapCon.setZoom(4);      }else{   Address address = (Address) addresses.get(0);   //设置初始地图的中心位置   GeoPoint geoPoint =new GeoPoint((int)(address.getLatitude()*1E6),(int)(address.getLongitude()*1E6)   );   mapCon = map.getController();   mapCon.setCenter(geoPoint);   mapCon.setZoom(20);   List<Overlay> overlays = this.map.getOverlays();   PositionOverlay overlay = new PositionOverlay(geoPoint,this,R.drawable.icon);   overlays.add(overlay);        }}@Overrideprotected boolean isRouteDisplayed() {// TODO Auto-generated method stubreturn false;}protected Dialog onCreateDialog(int id){return new AlertDialog.Builder(this).setTitle("查询出错了").setMessage("地名出错，请从新输入").create();}class PositionOverlay extends Overlay{private GeoPoint geoPoint;private Context context;private int drawable;public PositionOverlay(GeoPoint geoPoint,Context context,int drawable){super();this.geoPoint = geoPoint;this.context = context;this.drawable = drawable;}public void draw(Canvas canvas,MapView mapView,boolean shadow){Projection projection = mapView.getProjection();Point point = new Point();projection.toPixels(geoPoint, point);Bitmap bitmap =BitmapFactory.decodeResource(context.getResources(), drawable);canvas.drawBitmap(bitmap, (point.x-bitmap.getWidth()/2), (point.y-bitmap.getHeight()),new Paint());super.draw(canvas, mapView, shadow);}}}
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