CODEWITHSUNDEEP
androidredraw
user1293431
user1293431

Reputation: 11

google maps redraws after clicking back button

I have a google maps with different markers in my application. When I tap a marker (onTap()), a new detail window appears and theres some information about the specific location. My problem is that when I click back, the whole map redraws. I can see it, because the shadow of the markers is getting darker every time I open an infowindow and click the back button. Furthermore, it always zooms back to my current location (-> triggers the whole onResume() method).

How can I avoid that the map gets redrawn every time?

Overlay item class:

@Override
public boolean onTap(int index) {
    OverlayItem item = mOverlays.get(index);
    Item item = map.get(item);

    Intent intent = new Intent();
    intent.setClass(mContext, SomeExampleClass.class);
    mContext.startActivity(intent);

    return true;
}

Map Class:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.map);

    mapView = (MapView) findViewById(R.id.mainmap);
    mapView.invalidate();

    mapView.setBuiltInZoomControls(true);   

    dbZugriff = new DatabaseAccess(this);

    mylocationoverlay = new MyLocationOverlay(this, mapView);
    mc = mapView.getController();

}


@Override
protected void onResume() {

    super.onResume();

    mylocationoverlay.enableMyLocation();


    mapView.getOverlays().add(mylocationoverlay);
    mylocationoverlay.runOnFirstFix(new Runnable(){

        @Override
        public void run() {
            GeoPoint myLocation = mylocationoverlay.getMyLocation();
            mc.animateTo(myLocation);
            mc.setZoom(16);

            mapView.postInvalidate();
        }

    });

      SharedPreferences prefs = getSharedPreferences("prefs",Context.MODE_PRIVATE);

      SpecialitiesSelection specialitiesSelection = SpecialitiesSelection.loadFromPreferences(prefs, "");

    Cursor resultat = dbZugriff.createCursor(specialitiesSelection); 

    mapOverlays = mapView.getOverlays(); 

    List<Item> list = new ArrayList<Item>();

    if (resultat.moveToFirst()){
        do{

        Item daten = Item.createFromCursor(resultat);
        list.add(daten);

        }
        while(resultat.moveToNext());            
    }

Drawable drawable = this.getResources().getDrawable(R.drawable.ic_launcher);
itemizedoverlay = new  ItemOverlay(drawable,this,list);

    mapOverlays.add(itemizedoverlay);

}

Upvotes: 1

Views: 1083

Answers (1)

CommonsWare
CommonsWare

Reputation: 1007359

Your onResume() is being called every time you press BACK from SomeExampleClass. In onResume(), you are doing everything you say that you do not want to have happen. Hence, move this code someplace else (e.g., onCreate()).

Upvotes: 2

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