package com.yarin.android.Examples_09_04;
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.view.Menu;
import android.view.MenuItem;
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 Activity01 extends MapActivity
{
public MapController mapController;
public MyLocationOverlay myPosition;
public MapView myMapView;
private static final int ZOOM_IN=Menu.FIRST;
private static final int ZOOM_OUT=Menu.FIRST+1;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//ȡ��LocationManagerʵ��
LocationManager locationManager;
String context=Context.LOCATION_SERVICE;
locationManager=(LocationManager)getSystemService(context);
myMapView=(MapView)findViewById(R.id.MapView01);
//ȡ��MapControllerʵ�������Ƶ�ͼ
mapController=myMapView.getController();
//������ʾģʽ
myMapView.setSatellite(true);
myMapView.setStreetView(true);
//�������ſ���,���������Լ�ʵ�����Ų˵�
myMapView.displayZoomControls(false);
//����ʹ��MyLocationOverlay����ͼ
mapController.setZoom(17);
myPosition=new MyLocationOverlay();
List<Overlay> overlays=myMapView.getOverlays();
overlays.add(myPosition);
//����Criteria�������̣�����Ϣ
Criteria criteria =new Criteria();
//����Ҫ��
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(false);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//ȡ��Ч����õ�criteria
String provider=locationManager.getBestProvider(criteria, true);
//�õ�������ص���Ϣ
Location location=locationManager.getLastKnownLocation(provider);
//��������
updateWithNewLocation(location);
//ע��һ�������Եĸ��£�3000ms����һ��
//locationListener����������λ��Ϣ�ĸı�
locationManager.requestLocationUpdates(provider, 3000, 0,locationListener);
}
private void updateWithNewLocation(Location location)
{
String latLongString;
TextView myLocationText = (TextView)findViewById(R.id.TextView01);
String addressString="û���ҵ���ַ\n";
if(location!=null)
{
//Ϊ���Ʊ�־������������
myPosition.setLocation(location);
//ȡ�þ��Ⱥ�γ��
Double geoLat=location.getLatitude()*1E6;
Double geoLng=location.getLongitude()*1E6;
//����ת��Ϊint��
GeoPoint point=new GeoPoint(geoLat.intValue(),geoLng.intValue());
//��λ��ָ������
mapController.animateTo(point);
double lat=location.getLatitude();
double lng=location.getLongitude();
latLongString="���ȣ�"+lat+"\nγ�ȣ�"+lng;
double latitude=location.getLatitude();
double longitude=location.getLongitude();
//���ߵ�������ȷ������
Geocoder gc=new Geocoder(this,Locale.getDefault());
try
{
//ȡ�õ�ַ��ص�һЩ��Ϣ\���ȡ�γ��
List<Address> addresses=gc.getFromLocation(latitude, longitude,1);
StringBuilder sb=new StringBuilder();
if(addresses.size()>0)
{
Address address=addresses.get(0);
for(int i=0;i<address.getMaxAddressLineIndex();i++)
sb.append(address.getAddressLine(i)).append("\n");
sb.append(address.getLocality()).append("\n");
sb.append(address.getPostalCode()).append("\n");
sb.append(address.getCountryName());
addressString=sb.toString();
}
}catch(IOException e){}
}
else
{
latLongString="û���ҵ�����.\n";
}
//��ʾ
myLocationText.setText("�㵱ǰ����������:\n"+latLongString+"\n"+addressString);
}
private final LocationListener locationListener=new LocationListener()
{
//������ı�ʱ�����˺���
public void onLocationChanged(Location location)
{
updateWithNewLocation(location);
}
//Provider��disableʱ�����˺���������GPS���ر�
public void onProviderDisabled(String provider)
{
updateWithNewLocation(null);
}
//Provider��enableʱ�����˺���������GPS����
public void onProviderEnabled(String provider){}
//Provider��ת̬�ڿ��á���ʱ�����ú���������״ֱ̬���л�ʱ�����˺���
public void onStatusChanged(String provider,int status,Bundle extras){}
};
protected boolean isRouteDisplayed()
{
return false;
}
//ΪӦ�ó�����Ӳ˵�
public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
menu.add(0, ZOOM_IN, Menu.NONE, "�Ŵ�");
menu.add(0, ZOOM_OUT, Menu.NONE, "��С");
return true;
}
public boolean onOptionsItemSelected(MenuItem item)
{
super.onOptionsItemSelected(item);
switch (item.getItemId())
{
case (ZOOM_IN):
//�Ŵ�
mapController.zoomIn();
return true;
case (ZOOM_OUT):
//��С
mapController.zoomOut();
return true;
}
return true;
}
class MyLocationOverlay extends Overlay
{
Location mLocation;
//�ڸ�������ʱ�����ø����꣬һ��ͼ
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();
// ����γ��ת����ʵ����Ļ����
GeoPoint tmpGeoPoint = new GeoPoint((int)(mLocation.getLatitude()*1E6),(int)(mLocation.getLongitude()*1E6));
mapView.getProjection().toPixels(tmpGeoPoint, myScreenCoords);
paint.setStrokeWidth(1);
paint.setARGB(255, 255, 0, 0);
paint.setStyle(Paint.Style.STROKE);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.home);
canvas.drawBitmap(bmp, myScreenCoords.x, myScreenCoords.y, paint);
canvas.drawText("Here am I", myScreenCoords.x, myScreenCoords.y, paint);
return true;
}
}
}