百度地图之精度和纬度的相互转换

package com.njupt.bmap_helloworld;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.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.MapController;import com.baidu.mapapi.MapView;import com.baidu.mapapi.OverlayItem;import com.baidu.mapapi.PoiOverlay;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.graphics.drawable.Drawable;import android.view.Menu;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{private MapView mapView;//百度地图的相关控件private BMapManager bMapManager;//加载地图的引擎private String keyString = "04763B1D8C925195965E838C6E59DB767DAE4BA7";//百度地图的keyprivate MapController mapController;//在百度地图上添加一些控件,比如放大或缩小控件private MKSearch mkSearch;private Button button;private Button button2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);button = (Button) findViewById(R.id.reverseCode);button2 = (Button) findViewById(R.id.geocode);button.setOnClickListener(this);button2.setOnClickListener(this);mapView = (MapView) findViewById(R.id.bmapView);bMapManager = new BMapManager(MainActivity.this);//必须要加载keybMapManager.init(keyString, new MKGeneralListener() {@Overridepublic void onGetPermissionState(int arg0) {if(arg0 == 300){Toast.makeText(MainActivity.this, "输入的key有误,请核实...", 1).show();}}@Overridepublic void onGetNetworkState(int arg0) {// TODO Auto-generated method stub}});bMapManager.start();initMapActivity(bMapManager);mapView.setBuiltInZoomControls(true);//表示可以设置缩放功能mkSearch = new MKSearch();mkSearch.init(bMapManager, new MySearchListener());/** * 根据中心点、半径与检索词发起周边检索 * 第一个是查询的名称,第二个参数是构建一个GeoPoint点,第三个参数是查询的半径 */}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.reverseCode:GeoPoint geoPoint = new GeoPoint(39904965, 116327764);mkSearch.reverseGeocode(geoPoint);break;case R.id.geocode:EditText city = (EditText) this.findViewById(R.id.city);EditText geocodekey = (EditText) this.findViewById(R.id.geocodekey);mkSearch.geocode(city.getText().toString(), geocodekey.getText().toString());break;default:break;}}public class OverItemT extends ItemizedOverlay<OverlayItem>{private List<OverlayItem> list = new ArrayList<OverlayItem>();public OverItemT(Drawable marker,Context context,GeoPoint geoPoint,String title) {super(boundCenterBottom(marker));list.add(new OverlayItem(geoPoint, title, null));populate();}@Overrideprotected OverlayItem createItem(int arg0) {// TODO Auto-generated method stubreturn list.get(arg0);}@Overridepublic int size() {// TODO Auto-generated method stubreturn list.size();}}public class MySearchListener implements MKSearchListener{@Overridepublic void onGetAddrResult(MKAddrInfo res, int error) {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.iconmarka);drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());mapView.getOverlays().clear();}@Overridepublic void onGetBusDetailResult(MKBusLineResult arg0, int arg1) {// TODO Auto-generated method stub}@Overridepublic void onGetDrivingRouteResult(MKDrivingRouteResult arg0, int arg1) {// TODO Auto-generated method stub}@Overridepublic void onGetPoiResult(MKPoiResult result, int type, int iError) {if(result == null || iError != 0){Toast.makeText(MainActivity.this, "解析失败", 1).show();return ;}if(result != null || result.getCurrentNumPois() > 0){GeoPoint geoPoint = result.getAllPoi().get(0).pt;mapView.getController().animateTo(geoPoint);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();}}@Overridepublic void onGetSuggestionResult(MKSuggestionResult arg0, int arg1) {// TODO Auto-generated method stub}@Overridepublic void onGetTransitRouteResult(MKTransitRouteResult arg0, int arg1) {// TODO Auto-generated method stub}@Overridepublic void onGetWalkingRouteResult(MKWalkingRouteResult arg0, int arg1) {// TODO Auto-generated method stub}}@Overrideprotected void onDestroy() {super.onDestroy();if(bMapManager != null){bMapManager.destroy();bMapManager = null;}}@Overrideprotected void onResume() {super.onResume();if(bMapManager != null){bMapManager.start();}}@Overrideprotected void onPause() {super.onPause();if(bMapManager != null){bMapManager.stop();}}@Overrideprotected boolean isRouteDisplayed() {// TODO Auto-generated method stubreturn false;}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}