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我正在做android 地图应用程序，我需要在中心使用固定标记拖动地图。

下面是我的代码。它运行良好。添加了我需要对其进行搜索功能。即当我在顶部编辑框上键入地址时，该位置应位于固定定位标记下。

我怎么能这样做？

我的代码：

public class MapDragActivity extends MapActivity implements LocationListener{
    String pinadd="";
    private MapView map=null;
    private LocationManager locationManager;
    GeoPoint myLocation;

    /** Called when the activity is first created. */

    @SuppressWarnings("static-access")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.maplayout);


        map=(MapView)findViewById(R.id.map);
        map.setBuiltInZoomControls(true);


        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

        if (location != null)
            plotLocation(location);
        else
            locationManager.requestLocationUpdates(
                    locationManager.NETWORK_PROVIDER, 500L, 250.0f, this);

    }

    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub
        if (location != null)
            plotLocation(location);
    }

    public void onProviderDisabled(String provider) {
    }

    public void onProviderEnabled(String provider) {
    }

    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    @SuppressWarnings("static-access")
    @Override
    public void onResume() {
            super.onResume();
            locationManager.requestLocationUpdates(
                    locationManager.NETWORK_PROVIDER, 1000L, 500.0f, this);
   } 

    @Override
    public void onPause() {
            super.onPause();
            locationManager.removeUpdates(this);
    }

    @Override
    public void onDestroy(){
        locationManager.removeUpdates(this);
        super.onDestroy();
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event){
        boolean result = super.dispatchTouchEvent(event);
        if (event.getAction() == MotionEvent.ACTION_UP){
                    Projection projection = map.getProjection();
                    int y = map.getHeight() / 2;
                    int x = map.getWidth() / 2;

                    GeoPoint geoPoint = projection.fromPixels(x, y);
                    Log.v("Latitude & Logitude", geoPoint.getLatitudeE6() +"//"+geoPoint.getLongitudeE6());
        }
        return result;
    }

    double roundTwoDecimals(double d){
            DecimalFormat twoDForm = new DecimalFormat("#.######");
            return Double.valueOf(twoDForm.format(d));
    }

    public void plotLocation(Location location) {
            GeoPoint point = new GeoPoint(
                    (int) (roundTwoDecimals(location.getLatitude()) * 1E6),
                    (int) (roundTwoDecimals(location.getLongitude()) * 1E6));
            myLocation = point;
            map.getController().animateTo(point);
            map.getController().setCenter(point);
            zoomToMyLocation();
    }

    private void zoomToMyLocation() {
        if (myLocation != null) {
            map.getController().setZoom(18);
            map.getController().animateTo(myLocation);
        }
    }

    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }

谢谢。

4

1 回答 1

2

我做了一些有点棘手的事情，它在我的情况下有效。您可以通过 xml 布局将标记作为视图放置并使其居中。

android:layout_centerHorizontal="true"
android:layout_centerVertical="true"

然后，您应该对来自edittext的地址进行地理编码以获取纬度和经度。最后，将相机动画到您的输入位置。

CameraPosition aCameraPosition = new CameraPosition.Builder().target(
            new LatLng(latitude, longitude)).zoom(15).build();      
    aGoogleMapObject.animateCamera(CameraUpdateFactory.newCameraPosition(aCameraPosition));

如果需要，对 xml 中的标记进行调整。

于 2014-04-22T15:28:20.327 回答