1.申請Google API Key，參考前面文章

2.實現GPS的功能需要使用模擬器進行經緯度的模擬設置，請參考前一篇文章進行設置

3.創建一個Build Target為Google APIs的項目

4.修改Androidmanifest文件：

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<uses-library?android:name="com.google.android.maps"?/>??

<uses-permission?android:name="android.permission.INTERNET"/>??

?????<uses-permission?android:name="android.permission.ACCESS_COARSE_LOCATION"/>??

?????<uses-permission?android:name="android.permission.ACCESS_FINE_LOCATION"/>??

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5.修改main.xml文件

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<com.google.android.maps.MapView??

????android:id="@+id/MapView01"??

????android:layout_width="fill_parent"??

????android:layout_height="fill_parent"??

????android:apiKey="0f8FBFJliR7j_7aNwDxClBv6VW8O12V2Y21W_CQ"/>??

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注意：這里的apiKey值請相應修改為自己的key值

6.代碼清單:

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package?com.hoo.android.LocationMap;??

import?java.io.IOException;??

import?java.util.List;??

import?java.util.Locale;??

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.Criteria;??

import?android.location.Geocoder;??

import?android.location.Location;??

import?android.location.LocationListener;??

import?android.location.LocationManager;??

import?android.os.Bundle;??

import?android.widget.TextView;??

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;??

public?class?ActivityLocationMap?extends?MapActivity???

{??

????public?MapController?mapController;??

????public?MyLocationOverlay?myPosition;??

????public?MapView?myMapView;??

??????

????public?void?onCreate(Bundle?savedInstanceState)?{??

????????super.onCreate(savedInstanceState);??

????????setContentView(R.layout.main);??

????????//取得LocationManager實例??

????????LocationManager?locationManager;??

????????String?context=Context.LOCATION_SERVICE;??

????????locationManager=(LocationManager)getSystemService(context);??

????????myMapView=(MapView)findViewById(R.id.MapView01);??

????????//取得MapController實例，控制地圖??

????????mapController=myMapView.getController();??

????????//設置顯示模式為街景模式??

????????myMapView.setStreetView(true);??

??????????

????????//*************使用系統自帶的控件放大縮小視圖***************************??

????????//取得MapController對象(控制MapView)??

????????mapController?=?myMapView.getController();???

????????//設置地圖支持設置模式??

????????myMapView.setEnabled(true);??

????????//設置地圖支持點擊??

????????myMapView.setClickable(true);?????

????????//設置縮放控制,這里我們自己實現縮放菜單??

????????myMapView.displayZoomControls(true);????

????????myMapView.setBuiltInZoomControls(true);???

????????//*******************************************************************???????

????????設置設置地圖目前縮放大小倍數(從1到21)??

????????mapController.setZoom(17);??

????????//設置使用MyLocationOverlay來繪圖??

????????myPosition=new?MyLocationOverlay();??

??????????

????????List<Overlay>?overlays=myMapView.getOverlays();??

????????overlays.add(myPosition);??

????????//設置Criteria（標準服務商）的信息??

????????Criteria?criteria?=new?Criteria();??

????????//*****設置服務商提供的精度要求，以供篩選提供商************************??

????????criteria.setAccuracy(Criteria.POWER_HIGH);//表明所要求的經緯度的精度??????????????

????????criteria.setAltitudeRequired(false);?//高度信息是否需要提供??

????????criteria.setBearingRequired(false);??//壓力（氣壓？）信息是否需要提供??

????????criteria.setCostAllowed(false);??//是否會產生費用??

????????criteria.setPowerRequirement(Criteria.POWER_MEDIUM);//最大需求標準??

????????//*****************************************************??

????????//取得效果最好的criteria??

????????String?provider=locationManager.getBestProvider(criteria,?true);??

????????//得到坐標相關的信息??

????????Location?location=locationManager.getLastKnownLocation(provider);??

????????//更新位置信息??

????????updateWithNewLocation(location);??

????????//注冊一個周期性的更新，3000ms更新一次，0代表最短距離??

????????//locationListener用來監聽定位信息的改變（OnLocationChanged）??

????????locationManager.requestLocationUpdates(provider,?3000,?0,locationListener);??

????}??

??????

????//更新位置信息??

????private?void?updateWithNewLocation(Location?location)???

????{??

????????String?latLongString;?//聲明經緯度的字符串??

????????TextView?myLocationText?=?(TextView)findViewById(R.id.TextView01);??

????????//初始化地址為沒有找到，便于處理特殊情況??

????????String?addressString="沒有找到地址/n";??

????????if(location!=null)??

????????{??

????????????//****************獲取當前的經緯度，并定位到目標*************************??

????????????//為繪制標志的類設置坐標??

????????????myPosition.setLocation(location);??

????????????//取得經度和緯度??

????????????Double?geoLat=location.getLatitude()*1E6;??

????????????Double?geoLng=location.getLongitude()*1E6;??

????????????//將其轉換為int型??

????????????GeoPoint?point=new?GeoPoint(geoLat.intValue(),geoLng.intValue());??

????????????//定位到指定坐標??

????????????mapController.animateTo(point);??

????????????//*********************************************************************??

????????????double?lat=location.getLatitude();??//獲得經緯度??

????????????double?lng=location.getLongitude();??

????????????latLongString="經度："+lat+"/n緯度："+lng;???//設置經緯度字符串??

??????????????

???????????//?double?latitude=location.getLatitude();??

????????????//double?longitude=location.getLongitude();??

????????????//根據地理位置來確定編碼??

????????????Geocoder?gc=new?Geocoder(this,Locale.getDefault());??

????????????try??

????????????{??

????????????????//取得地址相關的一些信息：經度、緯度??

????????????????List<Address>?addresses=gc.getFromLocation(lat,?lng,1);??

????????????????StringBuilder?sb=new?StringBuilder();??

????????????????if(addresses.size()>0)??

????????????????{??

????????????????????Address?address=addresses.get(0);??

????????????????????for(int?i=0;i<address.getMaxAddressLineIndex()-1;i++)??

????????????????????????sb.append(address.getAddressLine(i)).append(",");???????????????????????

????????????????????????//獲得地址sb.append(address.getLocality()).append("/n");??

????????????????????????//獲得郵編sb.append(address.getPostalCode()).append("/n");??

????????????????????????sb.append(address.getCountryName());??

????????????????????????addressString=sb.toString();??

????????????????}??

????????????}catch(IOException?e){}??

????????}??

????????else??

????????{??

????????????latLongString="沒有找到坐標./n";??

????????}??

????????//顯示??

????????myLocationText.setText("您當前的位置如下:/n"+latLongString+"/n"+addressString);??

????}??

????//監聽位置信息的改變??

????private?final?LocationListener?locationListener=new?LocationListener()??

????{??

????????//當坐標改變時觸發此函數??

????????public?void?onLocationChanged(Location?location)??

????????{??

????????????updateWithNewLocation(location);??

????????}??

????????//Provider被disable時觸發此函數，比如GPS被關閉???

????????public?void?onProviderDisabled(String?provider)??

????????{??

????????????updateWithNewLocation(null);??

????????}??

????????//Provider被enable時觸發此函數，比如GPS被打開??

????????public?void?onProviderEnabled(String?provider){}??

????????//Provider的轉態在可用、暫時不可用和無服務三個狀態直接切換時觸發此函數??

????????public?void?onStatusChanged(String?provider,int?status,Bundle?extras){}??

????};??

????//方法默認是true，服務器所知的狀態列信息是否需要顯示??

????protected?boolean?isRouteDisplayed()??

????{??

????????return?false;??

????}??

??????

????class?MyLocationOverlay?extends?Overlay??

????{??

????????Location?mLocation;??

????????//在更新坐標，以便畫圖??

????????public?void?setLocation(Location?location)??

????????{??

????????????mLocation?=?location;??

????????}??

????????@Override??

????????public?boolean?draw(Canvas?canvas,?MapView?mapView,?boolean?shadow,?long?when)??

????????{??

????????????super.draw(canvas,?mapView,?shadow);??????????????

????????????Paint?paint?=?new?Paint();??

????????????Point?myScreenCoords?=?new?Point();??

????????????//?將經緯度轉換成實際屏幕坐標??

????????????GeoPoint?tmpGeoPoint?=?new?GeoPoint((int)(mLocation.getLatitude()*1E6),(int)(mLocation.getLongitude()*1E6));??????

????????????mapView.getProjection().toPixels(tmpGeoPoint,?myScreenCoords);??

????????????//*********paint相關屬性設置*********??

????????????paint.setStrokeWidth(0);//文??

????????????paint.setARGB(255,?255,?0,?0);??

????????????paint.setStyle(Paint.Style.STROKE);??

????????????//***********************************??

????????????Bitmap?bmp?=?BitmapFactory.decodeResource(getResources(),?R.drawable.green_dot);??

????????????canvas.drawBitmap(bmp,?myScreenCoords.x,?myScreenCoords.y,?paint);??

????????????canvas.drawText("您目前的位置",?myScreenCoords.x,?myScreenCoords.y,?paint);??

????????????return?true;??

????????}??

????}??

}??

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代碼參考網絡，加以修改優化，謝謝

7.程序運行截圖，前提是在命令行下輸入geo fix 121.5 31.24（定位到上海東方明珠），在命令行下可以輸入其他坐標，系統會根據坐標顯示其他位置，如接著輸入geo fix 113.325 23.113（定位到廣州海心沙），不知為什么輸入坐標的時候經常會不識別，有時能夠成功而有時不行，郁悶，求解……

轉載于:https://www.cnblogs.com/Free-Thinker/p/3606475.html

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