如何刷新谷歌地图。 [英] How to refresh Google map.

问题描述

大家好，这是我的code。

Hi Guys this is my code.

我能够刷新刷新按钮点击谷歌地图，但它显示我老坐标，在一些地区它表现在它的交叉图像的矩形图像..所以，球员，请让我知道哪里是错误或者我有什么修改在做的事。

I am able to refresh the google map on refresh button click but it is showing me the old coordinates and in some area it is show the rectangle image with cross image in it.. So guys please let me know where is the error or what modification i have to do in it.

公共类GmapActivity扩展MapActivity {MapView的地图按钮btnrefresh按钮btnbacktolist; INT chargenumber = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.gmapactivity);

    final Bundle bundle = this.getIntent().getExtras();
    chargenumber = bundle.getInt("ChargeNumber");
    int latitude = bundle.getInt("latitude");
    int longitude = bundle.getInt("longitute");
    CreateMap(latitude, longitude);

    btnrefresh = (Button) findViewById(R.id.btnReload);
    btnrefresh.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            RefreshMap();
        }
    });

    btnbacktolist = (Button) findViewById(R.id.btnBack);
    btnbacktolist.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            BacktoScheduleList(bundle);
        }
    });



}

protected void BacktoScheduleList(Bundle bundle) {

    ProgressDialog progressDialog = ProgressDialog.show(this, "",
            "Please wait...", true);
    bundle = this.getIntent().getExtras();
    Bundle Newbundle = new Bundle();
    Newbundle.putString("userid", bundle.getString("userid").trim());
    Newbundle.putString("username", bundle.getString("username").trim());
    Intent intent = new Intent(this, Ok.class);
    intent.putExtras(bundle);
    startActivityForResult(intent, 0);
    progressDialog.dismiss();
    finish();

}

private void CreateMap(int latitude, int longitude) {



    map = (MapView) findViewById(R.id.mvView);
    map.setBuiltInZoomControls(true);
    map.setStreetView(true);
    List<Overlay> mapOverlays = map.getOverlays();
    Drawable drawable = this.getResources().getDrawable(
            R.drawable.school_bus);
    MOverlayItems itemizedOverlay = new MOverlayItems(drawable, this);
    GeoPoint point = null;
    point = new GeoPoint(latitude, longitude);
    OverlayItem overlayitem = new OverlayItem(point, null, null);
    itemizedOverlay.addOverlay(overlayitem);
    mapOverlays.add(itemizedOverlay);
    MapController mapController = map.getController();
    mapController.animateTo(point);
    mapController.setZoom(12);

}

protected void RefreshMap() {
    map.getOverlays().clear();
    map.clearAnimation();
    WebServiceCaller webservicecaller = new WebServiceCaller();
    String result = webservicecaller.GetLatLong(chargenumber);

    if (result.toString().equalsIgnoreCase("false")) {

    } else {
        StringTokenizer tokens = new StringTokenizer(result, ",");
        int latitude = Integer.parseInt(tokens.nextToken());
        int longitude = Integer.parseInt(tokens.nextToken());
        ProgressDialog progressDialog = ProgressDialog.show(this, "",
                "Refreshing. Please wait...", true);
        CreateMap(latitude, longitude);
        progressDialog.dismiss();
    }
}

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

}

推荐答案

我用它下面的方法，它是为我工作正常。也许你还NEDD一个 map.invalidate（）电话。

I use it the following way and it is working properly for me. Probably you nedd also a map.invalidate() call.

protected void RefreshMap() {
  map.getOverlays().clear();
  map.invalidate();

  ... create itemizedOverlay

  map.getOverlays().add(itemizedOverlay);
  map.invalidate();
  map.getController().animateTo(point);
}

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