package com.gpdi;
  
import com.autonavi.mapapi.GeoPoint;
import com.autonavi.mapapi.MapActivity;
import com.autonavi.mapapi.MapController;
import com.autonavi.mapapi.MapView;
import com.autonavi.mapapi.MyLocationOverlay; 
 
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;

@SuppressWarnings("unused")
public class MapTestActivity  extends MapActivity { 
    
    MapView mMapView; 
    MapController mMapController; 
    GeoPoint point;

    private double latitude=0.0;
    private double longitude =0.0; 
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);  
        
        LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        if(locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
            Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if(location != null){
                latitude = location.getLatitude();
                longitude = location.getLongitude();
                }
        }else{
            LocationListener locationListener = new LocationListener() {
                
                // Provider的状态在可用、暂时不可用和无服务三个状态直接切换时触发此函数
                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {
                    
                }
                
                // Provider被enable时触发此函数，比如GPS被打开
                @Override
                public void onProviderEnabled(String provider) {
                    
                } 
                // Provider被disable时触发此函数，比如GPS被关闭 
                @Override
                public void onProviderDisabled(String provider) {
                    
                }
                
                //当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发 
                @Override
                public void onLocationChanged(Location location) {
                    if (location != null) {   
                        Log.e("Map", "Location changed : Lat: " + location.getLatitude() + " Lng: " + location.getLongitude());   
                    }
                }
            };
            //locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,1000, 0,locationListener); 
            Criteria crit = new Criteria(); 
            crit.setAccuracy(Criteria.ACCURACY_FINE);
            String provider = locationManager.getBestProvider(crit, true); 
            Location location = locationManager.getLastKnownLocation(provider); 
            //Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);   
            if(location != null){   
                latitude = location.getLatitude(); //经度   
                longitude = location.getLongitude(); //纬度 
            } 
        }
        mMapView = (MapView) findViewById(R.id.atmapsView); 
        mMapView.setBuiltInZoomControls(true); //设置吭用内置的缩放控件 
        mMapController = mMapView.getController(); // 得到mMapView的控制权,可以用它控制和驱动平移和缩放 
        point = new GeoPoint((int) (latitude * 1E6), (int) (longitude * 1E6)); //用给定的经纬度构造一个GeoPoint，单位是微度 (度 * 1E6)
        mMapController.setCenter(point); //设置地图中心点 
        mMapController.setZoom(12); //设置地图zoom级别
    }
}