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      1 package com.android.contacts.widget;
      2 
      3 import android.content.Context;
      4 import android.os.Parcelable;
      5 import android.util.AttributeSet;
      6 import android.view.MotionEvent;
      7 import android.widget.ScrollView;
      8 
      9 /**
     10  * A {@link ScrollView} that doesn't respond or intercept touch events.
     11  *
     12  * This is used in combination with {@link com.android.contacts.widget.MultiShrinkScroller} so
     13  * that MultiShrinkScroller can handle all scrolling & saving.
     14  */
     15 public class TouchlessScrollView extends ScrollView {
     16 
     17     public TouchlessScrollView(Context context) {
     18         this(context, null);
     19     }
     20 
     21     public TouchlessScrollView(Context context, AttributeSet attrs) {
     22         this(context, attrs, 0);
     23     }
     24 
     25     public TouchlessScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
     26         super(context, attrs, defStyleAttr);
     27     }
     28 
     29     @Override
     30     protected Parcelable onSaveInstanceState() {
     31         // Do not save the current scroll position. Always store scrollY=0 and delegate
     32         // responsibility of saving state to the MultiShrinkScroller.
     33         final int scrollY = getScrollY();
     34         setScrollY(0);
     35         final Parcelable returnValue = super.onSaveInstanceState();
     36         setScrollY(scrollY);
     37         return returnValue;
     38     }
     39 
     40     /**
     41      * {@inheritDoc}
     42      */
     43     @Override
     44     public boolean onInterceptTouchEvent(MotionEvent ev) {
     45         return false;
     46     }
     47 
     48     /**
     49      * {@inheritDoc}
     50      */
     51     @Override
     52     public boolean onTouchEvent(MotionEvent event) {
     53         return false;
     54     }
     55 }