Double tap: zoom on Android MapView?

Question

After a little bit of work my route application works fine. The only thing I just want to add is a double tap zoom in function, but I don\'t know how.

Could you give

Answer 1

Use the following code when you want to zoom in and zoom out

1. zoom in double click on top 50% of mapview
2. Zoom out double click on bottom 50% of mapview

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
      long thisTime = System.currentTimeMillis();

DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) activity.getSystemService(activity.getApplicationContext().WINDOW_SERVICE);
wm.getDefaultDisplay().getMetrics(metrics);
int height = metrics.heightPixels; 

if (thisTime - lastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
        // Double tap
         if((height/2)>ev.getY()){
// Zoom IN
            this.getController().zoomInFixing((int) ev.getX(), (int) ev.getY());
        }else{
            this.getController().zoomOutFixing((int) ev.getX(), (int) ev.getY());
//Zoom Out
        }
        lastTouchTime = -1;
      } else {
        // Too slow 
        lastTouchTime = thisTime;
      }
    }
    return super.onInterceptTouchEvent(ev);
  }