Android客户端GPS定位源码

1、AndroidManifest.xml文件配置 Main.java文件package cn.itcast.main;import java.util.List;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 android

2、.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Pain

3、t;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.view.MotionEvent

4、;import android.widget.TextView;public class Main extends MapActivity private MapController mapController; private GeoPoint geoPoint; private String msg; Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); /获得mapview MapView map

5、View=(MapView) this.findViewById(R.id.mapview); /地图的显示格式为交通图 mapView.setTraffic(true); /设置可控 mapView.setClickable(true); mapView.setEnabled(true); mapView.setBuiltInZoomControls(true); /得到gps设备的访问 LocationManager locationManager=(LocationManager) getSystemService(Context.LOCATION_SERVICE); /设置gps定位配

6、置 Criteria criteria=new Criteria(); /设置显示精度 criteria.setAccuracy(Criteria.ACCURACY_COARSE); /是否获得海拔数据 criteria.setAltitudeRequired(false); /是否获得方向数据 criteria.setBearingRequired(false); /是否允许运营商计费 criteria.setCostAllowed(true); /设置耗电程度 criteria.setPowerRequirement(Criteria.POWER_LOW); /获得服务供应商 String

7、 provider=locationManager.getBestProvider(criteria, true); /获取上一个定位点 Location location=locationManager.getLastKnownLocation(provider); /获得gps定位坐标信息 Double latitude=location.getLatitude()*1E6; Double longitude=location.getLongitude()*1E6; /获得卫星定位点 geoPoint=new GeoPoint(Value(),longitude.i

8、ntValue(); /获得地图控制器 mapController=mapView.getController(); /设置地图显示初始化精度 mapController.setZoom(12); mapController.animateTo(geoPoint); /实例化自定义绘图层 MyOverlay myOverlay=new MyOverlay(); /为mapview添加绘图层 mapView.getOverlays().add(myOverlay); /定义一个final，TextView，以备子类引用 final TextView textView=(TextView) fin

9、dViewById(R.id.textview); LocationListener locationListener=new LocationListener() Overridepublic void onStatusChanged(String provider, int status, Bundle extras) Overridepublic void onProviderEnabled(String provider) / TODO Auto-generated method stubOverridepublic void onProviderDisabled(String pro

10、vider) / TODO Auto-generated method stubOverridepublic void onLocationChanged(Location location) Double latitude=location.getLatitude()*1E6;Double longitude=location.getLongitude()*1E6;try /获得精度纬度字符串msg = 经度： + location.getLongitude() + n;msg += 纬度： + location.getLatitude() + n;/根据经纬度获得改点地址信息Geocode

11、r gc=new Geocoder(Main.this);List addresses=gc.getFromLocation(latitude, longitude, 1);if (addresses.size()0) /获得地址信息msg+=AddressLine:+addresses.get(0).getAddressLine(0)+n;/获得国家名msg += CountryName： + addresses.get(0).getCountryName()+n;msg += Locality： + addresses.get(0).getLocality() + n;msg += Fea

12、tureName： + addresses.get(0).getFeatureName();textView.setText(msg); catch (Exception e) e.printStackTrace(); /注册位置监听器，1秒钟扫描1次 locationManager.requestLocationUpdates(provider, 1000, 0, locationListener); class MyOverlay extends Overlay /保证触控事件不重复操作 private int count=0;Overridepublic boolean draw(Can

13、vas canvas, MapView mapView, boolean shadow,long when) /定义画笔Paint paint=new Paint();paint.setColor(Color.RED);/定义屏幕点Point screenPoint=new Point();/gps点转屏幕点mapView.getProjection().toPixels(geoPoint, screenPoint);/获得gps标志点图片Bitmap bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.flag);/绘

14、制gps点图片canvas.drawBitmap(bitmap, screenPoint.x,screenPoint.y, paint);/绘制文字说明canvas.drawText(当前位置, screenPoint.x, screenPoint.y, paint);return super.draw(canvas, mapView, shadow, when);Overridepublic boolean onTouchEvent(MotionEvent e, MapView mapView) /定义一个屏幕点Point screenPoint=new Point();/把gps点变成屏幕点mapView.getProjection().toPixels(geoPoint, screenPoint);/获得触点坐标int currentX=(int) e.getX();int currentY=(int) e.getY();/