android使用google地图

package dfzy.EX111; import java.util.List; 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.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.CompoundButton; import android.widget.TextView; import android.widget.ToggleButton; import android.widget.CompoundButton.OnCheckedChangeListener; 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.MyLocationOverlay; import com.google.android.maps.Overlay; import dfzy.EX111.R; public class EX111 extends MapActivity { MapView map; MapController ctrlMap; Button inBtn; Button outBtn; ToggleButton switchMap; @Override protected boolean isRouteDisplayed() { return false; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); map = (MapView)findViewById(R.id.myMapView); List<Overlay> overlays = map.getOverlays(); MyLocationOverlay myLocation = new MyLocationOverlay(this,map); myLocation.enableMyLocation(); overlays.add(myLocation); ctrlMap = map.getController(); inBtn = (Button)findViewById(R.id.in); outBtn = (Button)findViewById(R.id.out); switchMap = (ToggleButton)findViewById(R.id.switchMap); OnClickListener listener = new OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.in: ctrlMap.zoomIn(); break; case R.id.out: ctrlMap.zoomOut(); break; default: break; } } }; inBtn.setOnClickListener(listener); outBtn.setOnClickListener(listener); switchMap.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton cBtn, boolean isChecked) { if (isChecked == true) { map.setSatellite(true); } else { map.setSatellite(false); } } }); LocationManager locationManager; String context = Context.LOCATION_SERVICE; locationManager = (LocationManager)getSystemService(context); //String provider = LocationManager.GPS_PROVIDER; Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setAltitudeRequired(false); criteria.setBearingRequired(false); criteria.setCostAllowed(true); criteria.setPowerRequirement(Criteria.POWER_LOW); String provider = locationManager.getBestProvider(criteria, true); Location location = locationManager.getLastKnownLocation(provider); updateWithNewLocation(location); locationManager.requestLocationUpdates(provider, 2000, 10, locationListener); } private final LocationListener locationListener = new LocationListener() { public void onLocationChanged(Location location) { updateWithNewLocation(location); } public void onProviderDisabled(String provider){ updateWithNewLocation(null); } public void onProviderEnabled(String provider){ } public void onStatusChanged(String provider, int status, Bundle extras){ } }; private void updateWithNewLocation(Location location) { String latLongString; TextView myLocationText; myLocationText = (TextView)findViewById(R.id.myLocationText); if (location != null) { double lat = location.getLatitude(); double lng = location.getLongitude(); latLongString = "纬度:" + lat + "\n经度:" + lng; ctrlMap.animateTo(new GeoPoint((int)(lat*1E6),(int)(lng*1E6))); } else { latLongString = "获取失败！"; } myLocationText.setText("现在的位置是:\n" + latLongString); } }