Handling Touch Events In Surfaceview Over Maps Api V2

I'm having issues in creating event handler that will be triggered while user moves the map around. There is a OnCameraChangeListener, but it is triggered after map moving stops.

Solution 1:

I have implemented some other solution to solve this problem. What I did - is I placed my GoogleMap inside custom RelativeLayout. After that onInterceptTouchEvent callback works like a charm and underlying map receives touch events as expected

here is my xml:

<com.my.package.name.map.MapRelativeLayout
    android:id="@+id/map_root_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

     <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment"/>

</com.my.package.name.map.MapRelativeLayout>

And custom relative layout:

package com.my.package.name.map;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.RelativeLayout;

publicclassMapRelativeLayoutextendsRelativeLayout
{
    private GestureDetector gestureDetector;

    publicMapRelativeLayout(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        gestureDetector = newGestureDetector(context, newGestureListener());
    }

    @OverridepublicbooleanonInterceptTouchEvent(MotionEvent ev)
    {
        gestureDetector.onTouchEvent(ev);
        returnfalse;
    }

    privateclassGestureListenerextendsGestureDetector.SimpleOnGestureListener {

        @OverridepublicbooleanonDown(MotionEvent e) {
            returntrue;
        }
        @OverridepublicbooleanonDoubleTap(MotionEvent e) {
            returnfalse;
        }

        @OverridepublicbooleanonFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY)
        {
            returnfalse;
        }

        @OverridepublicbooleanonScroll(MotionEvent e1, MotionEvent e2,
                float distanceX, float distanceY)
        {
            //do whatever you want herereturnfalse;
        }
    }
}

Solution 2:

From: Android ListView: overriding causes scrolling do not executed

Have you tried calling super.onTouchEvent(event) in your onTouchEvent method?

Edit - I think you want to return false as well in your onScroll method.

Then your onTouchEvent method should be:

@OverridepublicbooleanonTouchEvent(MotionEvent event) {
    if (gestureDetector.onTouchEvent(event)) {
        returntrue;
    }
    returnsuper.onTouchEvent(event);
}

Other possible helpful links:

• Android: how to tell if a view is scrolling
• Adding GestureOverlayView to my SurfaceView class, how to add to view hierarchy?
• Android onFling not responding
• OnGestureListener onDown method never gets called
• Overriding onTouchEvent competing with ScrollView