Googleマップの現在地を開こうとしています

Question

アンドロイドのGoogleマップで自分の現在地を開いたり、フォーカスを合わせたりします。私は、私のアプリケーションが座標を取得し、これらの座標から私の場所の名前を与えると最後のフォーカスに現在の位置マップを与える... 親切に誰かが私に何を提案し、可能な場合は私にいくつかのコードサンプルを与える。私はアンドロイドに新しいです:) 事前に感謝！ :)ここで

Answer 1

は、現在位置が単純な地図表示の一例である

MyMap.java表示マップはこちら

class MyMap extends MapActivity{ 
/** Called when the activity is first created. */ 
GeoPoint defaultPoint; 
static GeoPoint point; 
static MapController mc; 
static MapView mapView; 
static double curLat =0; 
static double curLng =0; 

@Override 
public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    mapView = (MapView)findViewById(R.id.mapview); 
    mapView.setBuiltInZoomControls(true); 

    String coordinates[] = {"22.286595", "70.795685"}; 
    double lat = Double.parseDouble(coordinates[0]); 
    double lng = Double.parseDouble(coordinates[1]); 

    mc = mapView.getController(); 

    defaultPoint = new GeoPoint(
     (int) (lat * 1E6), 
     (int) (lng * 1E6)); 

    mc.animateTo(defaultPoint); 
    mc.setZoom(13); 

    MapOverlay mapOverlay = new MapOverlay(); 
    List<Overlay> listOfOverlays = mapView.getOverlays(); 
    listOfOverlays.clear(); 
    listOfOverlays.add(mapOverlay); 

    mapView.invalidate(); 

    Intent startService = new Intent(getApplicationContext(),ServiceLocation.class); 
    startService(startService); 
} 

public static void updateMap() { 
    if(ServiceLocation.curLocation!=null){ 
     curLat = ServiceLocation.curLocation.getLatitude(); 
     curLng = ServiceLocation.curLocation.getLongitude();   
     if(mapView!=null){ 
      point = new GeoPoint((int)(curLat*1e6),(int)(curLng*1e6)); 
      mc.animateTo(point); 
      mapView.invalidate(); 
     } 
    } 
} 
@Override 
protected boolean isRouteDisplayed(){ 
    return false; 
} 
class MapOverlay extends com.google.android.maps.Overlay{ 
    @Override 
    public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { 
     super.draw(canvas, mapView, shadow);     

     if(!shadow){ 
      //---translate the GeoPoint to screen pixels--- 
      Point screenPts = new Point(); 
      if(curLat==0 && curLng==0) 
       mapView.getProjection().toPixels(defaultPoint, screenPts); 
      else{ 
       mapView.getProjection().toPixels(point, screenPts); 
      } 
      //---add the marker--- 
      Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.cur_loc);    
      canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null); 
     } 
     return true; 
    } 
} 
} 

は、GPS

を使用して緯度/経度を取得するための私のバックグラウンドサービスコードであります

class ServiceLocation extends Service{ 
private LocationManager locMan; 
private Boolean locationChanged; 
private Handler handler = new Handler(); 

public static Location centerLoc; 
public static Location curLocation; 
public static boolean isService = true; 


LocationListener gpsListener = new LocationListener() { 
    public void onLocationChanged(Location location) { 
     if (curLocation == null) { 
      curLocation = location; 
      locationChanged = true; 
     }else if (curLocation.getLatitude() == location.getLatitude() && curLocation.getLongitude() == location.getLongitude()){ 
      locationChanged = false; 
      return; 
     }else 
      locationChanged = true; 

     curLocation = location; 


     if (locationChanged) 
      locMan.removeUpdates(gpsListener); 


    MyMap.updateMap(); 
    } 
    public void onProviderDisabled(String provider) { 
    } 

    public void onProviderEnabled(String provider) { 
     // Log.w("GPS", "Location changed", null); 
    } 

    public void onStatusChanged(String provider, int status,Bundle extras) { 
     if (status == 0)// UnAvailable 
     { 
     } else if (status == 1)// Trying to Connect 
     { 
     } else if (status == 2) {// Available 
     } 
    } 

}; 

@Override 
public void onCreate() { 
    super.onCreate(); 
    if (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) { 
     locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,100, 1, gpsListener); 
    } else { 
     this.startActivity(new Intent("android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS")); 
    } 
    centerLoc = new Location(""); 
    curLocation = locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);;*/ 
    centerLoc = new Location(""); 
    curLocation = getBestLocation(); 

    if (curLocation == null) 
     Toast.makeText(getBaseContext(),"Unable to get your location", Toast.LENGTH_SHORT).show(); 

    isService = true; 
} 
final String TAG="LocationService"; 
    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
return super.onStartCommand(intent, flags, startId); 
    } 



@Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
    } 

    @Override 
    public void onStart(Intent i, int startId){ 
     handler.postDelayed(GpsFinder,5000);// will start after 5 seconds 
    } 

    @Override 
    public void onDestroy() { 
     handler.removeCallbacks(GpsFinder); 
     handler = null; 
     Toast.makeText(this, "Stop services", Toast.LENGTH_SHORT).show(); 
     isService = false; 
    } 

    public IBinder onBind(Intent arg0) { 
     return null; 
    } 

    public Runnable GpsFinder = new Runnable(){ 
    public void run(){ 
     Location tempLoc = getBestLocation(); 
     if(tempLoc!=null) 
      curLocation = tempLoc; 
     handler.postDelayed(GpsFinder,5000);// register again to start after 5 seconds...   
    } 
    }; 

    private Location getBestLocation() {   
     Location gpslocation = null; 
     Location networkLocation = null; 

     if(locMan==null) 
       locMan = (LocationManager) getApplicationContext() .getSystemService(Context.LOCATION_SERVICE); 
     try { 
      if(locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)){ 
       locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,100, 1, gpsListener); 
       gpslocation = locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
      } 
      if(locMan.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){ 
       locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,100, 1, gpsListener); 
       networkLocation = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
      } 
     } catch (IllegalArgumentException e) { 
      //Log.e(ErrorCode.ILLEGALARGUMENTERROR, e.toString()); 
      Log.e("error", e.toString()); 

     } 
     if(gpslocation==null && networkLocation==null) 
      return null; 

     if(gpslocation!=null && networkLocation!=null){ 
      if(gpslocation.getTime() < networkLocation.getTime()) 
       return networkLocation; 
      else 
       return gpslocation; 
     } 
     if (gpslocation == null) { 
      return networkLocation; 
     } 
     if (networkLocation == null) { 
      return gpslocation; 
     } 
     return null; 
    } 
}