Seems like Samsung disabled their overscroll (probably due to an Apple suit).
I have an implementation of a view that extends ScrollView
and overrides
protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY,int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent)
{
...
return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, 0, metrics.widthPixels,isTouchEvent);
}
On every other device (Gingerbread and up of course), overScrollBy
is being called when the scroller reaches it's end, and the user can actually overscroll the view).
On Android 2.3.5+ Samsung have Implemented some kind of mechanism that disables overscroll completely (not just their overscroll implementation, but also Android's implementation), and every time a user tries to overscroll, the following LogCat event is being printed:
02-13 16:02:34.230: D/BounceScrollRunnableDefault(15783): run(), TimeFraction=0.5225, mBounceExtent=7.273352
Is there any way to unlock what Samsung did there? Or maybe another way to create an overscroller?
I just faced the same problem and finally came up with the following custom overscroll detection:
listView.setOnTouchListener(new OnTouchListener() {
private static final float OVERSCROLL_THRESHOLD_IN_PIXELS = 70;
private float downY;
@Override
public boolean onTouch(View v, MotionEvent event) {
int firstVisibleItem = listView.getFirstVisiblePosition();
int totalItemCount = listView.getCount();
int visibleItemCount = listView.getChildCount();
boolean onTop = firstVisibleItem == 0 && listView.getChildAt(0) != null && listView.getChildAt(0).getTop() == 0;
boolean onBottom = firstVisibleItem + visibleItemCount == totalItemCount && listView.getChildAt(visibleItemCount-1).getBottom() == listView.getHeight();
if(onTop || onBottom) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
downY = event.getY();
break;
case MotionEvent.ACTION_MOVE:
float deltaY = event.getY() - downY;
if(onTop && deltaY > OVERSCROLL_THRESHOLD_IN_PIXELS) {
// Top overscroll
}
if(onBottom && -deltaY > OVERSCROLL_THRESHOLD_IN_PIXELS) {
// Bottom overscroll
}
break;
}
}
return false;
}
});
Problem solved, I have created my own OverScrollView, you are welcome to use it. https://github.com/EverythingMe/OverScrollView