通过地名获得经纬度并标识在地图上.doc

最新历史版本 :Android 通过地名获得经纬度并标识在地图上 - 未审核返回文档 编辑时间:10-25 17:15历史版本编辑者:火凤青鸾历史版本: 内容长度:6257图片数:1目录数:0 修改原因:要是调用Geocoder的getFromLocationName()，该方法可以传入地名。在使用该方法前需要geo = new Geocoder(this, Locale.CHINA);不然在地图上是查询不到的。Java代码/*/package com.decarta.demo;import java.io.IOException;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.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;/* author Tony Shen*/public class Main extends MapActivity / 地图显示控制相关变量定义private MapView map = null;private MapController mapCon;private Geocoder geo;private static final int ERROR_DIALOG = 1;/* Called when the activity is first created. */Overridepublic void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);setContentView(R.layout.main);geo = new Geocoder(this, Locale.CHINA);/ 获取MapViewmap = (MapView) findViewById(R.id.map);/ 设置显示模式map.setTraffic(true);map.setSatellite(false);map.setStreetView(true);/ 设置可以缩放map.setBuiltInZoomControls(true);Listaddresses = null;try addresses = geo.getFromLocationName(江苏省苏州市寒山寺, 1); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();if(addresses.size() = 0) showDialog(ERROR_DIALOG);GeoPoint geoBeijing = new GeoPoint(int) (39.906033* 1000000),(int) (116.397700 * 1000000);mapCon = map.getController();mapCon.setCenter(geoBeijing);mapCon.setZoom(4); else Address address = addresses.get(0);/ 设置初始地图的中心位置GeoPoint geoPoint = new GeoPoint(int) (address.getLatitude() * 1000000),(int) (address.getLongitude() * 1000000);mapCon = map.getController();mapCon.setCenter(geoPoint);mapCon.setZoom(16);List overlays = this.map.getOverlays();overlays.add(new PositionOverlay(geoPoint, this, R.drawable.ic_red_pin);Overrideprotected boolean isRouteDisplayed() return false;Overrideprotected Dialog onCreateDialog(int id) return new AlertDialog.Builder(this).setTitle(查询出错哦).setMessage(路名/地名出错，请重新输入!).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;Overridepublic 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(), null);super.draw(canvas, mapView, shadow);/*/package com.decarta.demo;import java.io.IOException;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.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;/* author Tony Shen*/public class Main extends MapActivity / 地图显示控制相关变量定义private MapView map = null;private MapController mapCon;private Geocoder geo;private static final int ERROR_DIALOG = 1;/* Called when the activity is first created. */Overridepublic void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);setContentView(R.layout.main);geo = new Geocoder(this, Locale.CHINA);/ 获取MapViewmap = (MapView) findViewById(R.id.map);/ 设置显示模式map.setTraffic(true);map.setSatellite(false);map.setStreetView(true);/ 设置可以缩放map.setBuiltInZoomControls(true);Listaddresses = null;try addresses = geo.getFromLocationName(江苏省苏州市寒山寺, 1); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();if(addresses.size() = 0) showDialog(ERROR_DIALOG);GeoPoint geoBeijing = new GeoPoint(int) (39.906033* 1000000),(int) (116.397700 * 1000000);mapCon = map.getController();mapCon.setCenter(geoBeijing);mapCon.setZoom(4); else Address address = addresses.get(0);/ 设置初始地图的中心位置GeoPoint geoPoint = new GeoPoint(int) (address.getLatitude() * 1000000),(int) (address.getLongitude() * 1000000);mapCon = map.getController();mapCon.setCenter(geoPoint);mapCon.setZoom(16);List overlays = this.map.getOverlays();overlays.add(new PositionOverlay(geoPoint, this, R.drawable.ic_red_pin);Overrideprotected boolean isRouteDisplayed() return false;Overrideprotected Dialog onCreateDialog(int id) return new AlertDialog.Builder(this).setTitle(查询出错哦).setMessage(路名/地名出错，请重新输入!).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;Overridepublic void draw(Canvas canvas, MapView mapView, boolean shadow) Projection projection = mapView.getProjection();Point point = new Point();