Stop ScrollView from auto-scrolling to an EditText

Question

Seems to be a common problem without a great solution that I have found. Goal is to stop a ScrollView from auto-scrolling to an EditText (or any vi

Answer 1

My solution is below, to trace the source code and override some function to stop auto scrolling by focused item.

You can check if the focusedView is TextView or its child is TextView, by using focusedView.findViewById(R.id.textview_id_you_defined) != null or focusedView instanceof TextView == true.

public class StopAutoFocusScrollView extends ScrollView {

    private View focusedView;
    private ScrollMonitorListener listener;

    public interface ScrollMonitorListener {
        public boolean enableScroll(View view);
    }
    public StopAutoFocusScrollView(Context context) {
        super(context);
    }

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

    public StopAutoFocusScrollView(Context context, AttributeSet attrs, 
           int defStyle) {
        super(context, attrs, defStyle);
    }

    public void setScrollMonitorListener(ScrollMonitorListener listener) {
        this.listener = listener;
    }

    @Override
    public void requestChildFocus(View child, View focused) {
        focusedView = focused
        super.requestChildFocus(child, focused);
    }
    //flow : requestChildFocus -> scrollToChild -> scrollBy
    //Therefore, you can give listener to determine you want scroll to or not
    @Override
    public void scrollBy(int x, int y) {
        if (listener == null || listener.enableScroll(focusedView)) {
            super.scrollBy(x, y);
        }
    }
}