Scrollview inside a scrollview in android issue

Question

I have a scrollview inside a scrollview . The xml is like this

<RelativeLayout ....
    <ScrollView.....
         <RelativeLayout ....
           <Button.....
           <Button ....
           <ScrollView
             <RelativeLayout ....
                 ..........
               </RelativeLayout>
             </ScrollView>
         </RelativeLayout>
     </ScrollView>
 </RelativeLayout>

in this second scrollview in not scrolling smoothly. can give a solution for that. I tried a lot of solution given in the internet but not working.

Its not a good practice to have 2 scrollViews which scroll in the same direction inside one another, even if it works — Naresh, Jul 16 '13 at 08:03
You do not need to use scrollview inside scrollview use can scroll inner scroll from the outer scroll. — Muhammad Aamir Ali, Jul 16 '13 at 08:04
its not a good practice to have scrollview inside a scrollview, you might want to think of your layout design again. :) — Riandy, Jul 16 '13 at 08:09
the requirement is needed a scrollview inside scrollview. the child scrollview is not smooth as the parent scrollview — Nithinlal, Jul 16 '13 at 08:20

score 21 · Accepted Answer · answered Jul 16 '13 at 08:40

21

Try this code. It is working for me`

 parentScrollView.setOnTouchListener(new View.OnTouchListener() {

public boolean onTouch(View v, MotionEvent event)
{
    findViewById(R.id.childScrollView).getParent().requestDisallowInterceptTouchEvent(false);
return false;
}
});
childScrollView.setOnTouchListener(new View.OnTouchListener() {

public boolean onTouch(View v, MotionEvent event)
{

// Disallow the touch request for parent scroll on touch of
// child view
v.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
});`

answered Jul 16 '13 at 08:40

Deepthi

211
2
5

1

for me this does noting, the childScrollView wont receive its ontouch whatever i do. – SjoerdvGestel Jul 09 '15 at 11:06
1

Can anyone explain what does it do to the parent of the childscroll.. How does it avoid the parent scroll view to stop scrolling and allow the child to scroll – DJphy Nov 19 '15 at 12:10

score 7 · Answer 2 · answered May 27 '14 at 22:15

7

A different solution is to use this class as the parent class

public class NoInterceptScrollView extends ScrollView {

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

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return false;
    }

}

answered May 27 '14 at 22:15

Tyler Davis

2,420
2
23
19

I would prefer this as a simpler solution – Hendra Anggrian Dec 07 '14 at 14:24

score 0 · Answer 3 · answered Dec 16 '14 at 02:37

I had to improve Deepthi's solution since it didn't work for me; I guess because my child scrollview is full of views (I mean child views use all of the scrollview drawing space). To make it fully functional, I had to also disallow the touch request for parent scroll on touch of all children views inside the child scroll view:

parentScrollView.setOnTouchListener(new View.OnTouchListener() {
    public boolean onTouch(View v, MotionEvent event)
    {
        findViewById(R.id.childScrollView).getParent().requestDisallowInterceptTouchEvent(false);
        return false;
    }
});
childScrollView.setOnTouchListener(new View.OnTouchListener() {
    public boolean onTouch(View v, MotionEvent event)
    {
        // Disallow the touch request for parent scroll on touch of
        // child view
        v.getParent().requestDisallowInterceptTouchEvent(true);
        return false;
    }
});`
childScrollviewRecursiveLoopChildren(parentScrollView, childScrollView);
public void childScrollviewRecursiveLoopChildren(final ScrollView parentScrollView, View parent) {
    for (int i = ((ViewGroup) parent).getChildCount() - 1; i >= 0; i--) {
        final View child = ((ViewGroup) parent).getChildAt(i);
        if (child instanceof ViewGroup) {
            childScrollviewRecursiveLoopChildren(parentScrollView, (ViewGroup) child);
        } else {
            child.setOnTouchListener(new View.OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event)
                {
                    // Disallow the touch request for parent scroll on touch of
                    // child view
                    parentScrollView.requestDisallowInterceptTouchEvent(true);
                    return false;
                }
            });
        }
    }
}

Scrollview inside a scrollview in android issue

3 Answers3

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