Double click/tap detection on android's MapView

Jan 23

If there is a cleaner way to do it, please share :)

1. Override the default MapView with your own implementation;

2. Override the onInterceptTouchEvent method;

3. Check if the last event was also a click and happened close by (say in the last 250ms);

3.1. If so, it’s a double tap; do whatever you want (in this case I zoom in on the last clicked point);

3.2. If not, ignore :)

Here’s the code (Sorry for the formatting mess, but... :)):

import android.content.Context;

import android.util.AttributeSet;

import android.view.MotionEvent;

import com.google.android.maps.MapView;

public class MyMapView extends MapView {

private long lastTouchTime = -1;

public MyMapView(Context context, AttributeSet attrs) {

super(context, attrs);

}

@Override

public boolean onInterceptTouchEvent(MotionEvent ev) {

if (ev.getAction() == MotionEvent.ACTION_DOWN) {

long thisTime = System.currentTimeMillis();

if (thisTime - lastTouchTime < 250) {

// Double tap

this.getController().zoomInFixing((int) ev.getX(), (int) ev.getY());

lastTouchTime = -1;

} else {

// Too slow :)

lastTouchTime = thisTime;

}

return super.onInterceptTouchEvent(ev);

}