Scroll to a specific view in scroll view

Question

I have added a scrollview and the subchilds inside the scrollview. At some point i need to scroll to a specific view.

<scrollview>  1. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  2. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  3. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  4. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  5. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  6. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>  7. <linearlayout>      <textview></textview>     <textview></textview>     </linearlayout>     <button>    </button>   </scrollview> 

The above layout was created dynamically. so i can't have the xml file posted here. Layout creation is completely dynamic. Even the number of child view inside the linearlayout may also vary.

So when i click on the button i need to get scrolled to a particular view say here when i click on button i need to scroll to the linear layout 4. I tried with the scrollTo method but it scrolls to the top of the scrollview.

Please provide some suggestions.

Answer 1

If child that we need to scroll to is not a direct child then above solutions don't work

I have used below solution in my project, sharing it may be helpful to others

/**  * Used to scroll to the given view.  *  * @param scrollViewParent Parent ScrollView  * @param view View to which we need to scroll.  */ private void scrollToView(final ScrollView scrollViewParent, final View view) {     // Get deepChild Offset     Point childOffset = new Point();     getDeepChildOffset(scrollViewParent, view.getParent(), view, childOffset);     // Scroll to child.     scrollViewParent.smoothScrollTo(0, childOffset.y); }  /**  * Used to get deep child offset.  * <p/>  * 1. We need to scroll to child in scrollview, but the child may not the direct child to scrollview.  * 2. So to get correct child position to scroll, we need to iterate through all of its parent views till the main parent.  *  * @param mainParent        Main Top parent.  * @param parent            Parent.  * @param child             Child.  * @param accumulatedOffset Accumulated Offset.  */ private void getDeepChildOffset(final ViewGroup mainParent, final ViewParent parent, final View child, final Point accumulatedOffset) {     ViewGroup parentGroup = (ViewGroup) parent;     accumulatedOffset.x += child.getLeft();     accumulatedOffset.y += child.getTop();     if (parentGroup.equals(mainParent)) {         return;     }     getDeepChildOffset(mainParent, parentGroup.getParent(), parentGroup, accumulatedOffset); } 

Answer 2

This should do the trick:

View targetView = findViewById(R.id.DESIRED_VIEW_ID);   targetView.getParent().requestChildFocus(targetView,targetView); 

public void RequestChildFocus (View child, View focused)

child - The child of this ViewParent that wants focus. This view will contain the focused view. It is not necessarily the view that actually has focus.

focused - The view that is a descendant of child that actually has focus