double click/tap map zoom (Android) [duplicate]

Answer 1

I love this solution of extending the MapView with a custom view and using that throughout your application. MapView has a function to intercept touch gestures which you can use to do some double click voodoo. If you have more than one map in your application, this is a great way to stay DRY.

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;

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 < ViewConfiguration.getDoubleTapTimeout()) {
                // Double tap
                this.getController().zoomInFixing((int) ev.getX(), (int) ev.getY());
                lastTouchTime = -1;
            } else {
                // Too slow :)
                lastTouchTime = thisTime;
            }
        }

        return super.onInterceptTouchEvent(ev);
    }
}

From this guy