CODEWITHSUNDEEP
androidscrollviewonfling
Anukool
Anukool

Reputation: 5401

Scroll view and OnGestureListener

Here is the layout - 

 <ScrollView>

<RelativeLayout>

    <Layout1>
    </Layout1>

    <Layout2>
    </Layout2>

    <Layout3>
    </Layout3>

    <Layout4>
    </Layout4>

    <Layout5>
    </Layout5>

    <Layout6>
    </Layout6>
</RelativeLayout>
</ScrollView>

I have implemented the onGestureListener in the Activity .
I have to detect the swipe actions- swipe up and swipe down on the individual layouts (layout 1 to layout 6). Since the layouts are in a scrollview the swipe action(OnFling) is not getting detected.
How to detect the onFling for the child elements of the scrollview ?
Any help will be highly appreciated.

Edit : Adding some code -

Here is the activity - 

  public class ServiceScreen extends Activity implements OnFocusChangeListener,
    OnTouchListener, OnGestureListener ....

The layout and the listener - 

RelativeLayout rlCarBrand;
    ....

    rlCarBrand.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            return gestureScanner.onTouchEvent(event);
        }
    });

Overriden methods - 

@Override
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
        float arg3) {
    // TODO Auto-generated method stub
    Log.i("LogMessage", "On Fling");
    return true;
}


@Override
public boolean onDown(MotionEvent arg0) {
    // TODO Auto-generated method stub
    return true;
}

Upvotes: 1

Views: 1701

Answers (2)

Anukool
Anukool

Reputation: 5401

Create a CustomScrollView class that extends ScrollView.

With this we can change the scrolling enabled property of the Scrollview.

public class CustomScrollView extends ScrollView {

    boolean bScrollable = false;

    public CustomScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }


    public void setScrollingEnabled(boolean enabled) {
        bScrollable = enabled;
    }

    public boolean isScrollable() {
        return bScrollable;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            // if we can scroll pass the event to the superclass
            if (bScrollable) {
                return super.onTouchEvent(ev);
            }

            // only continue to handle the touch event if scrolling enabled
            return bScrollable; // mScrollable is always false at this point

        default:
            return super.onTouchEvent(ev);
        }
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // Don't do anything with intercepted touch events if
        // we are not scrollable
        if (!bScrollable) {
            return false;
        } else {
            return super.onInterceptTouchEvent(ev);
        }
    }

}

Upvotes: 1

Rohit Sharma
Rohit Sharma

Reputation: 13815

try extending ScrollView class and override these onDown and onFling. something like this

@Override
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
    float arg3) {
    super.onFling(arg0,arg1,arg2,arg3);   
    return false;
}

see if this works.

point is to return false from a scrollview method which is consuming the gesture event. google it more. i am not sure about it.

Upvotes: 1

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