Develop Reference

How to get the appbarlayout to scroll slower than its sibling nested scroll view in Coordinator layout system?

I have an AppBarLayout with height around 200dp, and I have a nested scroll view sibling to the appbarlayout all wrapped inside a coordinatorlayout, how do I get the appbarlayout to scroll slower than nested scroll view, ideally using CoordinatorLayout.Behavior Like so:-

Try adding app:layout_collapseMode="parallax" to a layout inside CollapsingToolbarLayout. With this you will get parallax effect on your scroll.

Layout footer smart on ScrollView

I need display a Layout on botton of ScrollView such as:
1 - If the height of the content of the ScrollView is less than the height of the ScrollView, the Layout should be at the bottom of the ScrollView
2 - If the height of the content of the ScrollView is greater than the height of the ScrollView, then the Footer Layout should hide and only show Title.
When user scroll up to end of content, then Layout footer also scroll follow content.
PS: I'm using scrollview and must use it for my project.

RelativeLayout with ScrollView

Hi have main Linear Layout inside that I have these view with same tree ScrollView,LinearLayout and then Relative Layout ,I am trying to set Relative Layout Margin that is most child View but its Margin not doing anything,I have all of these view with are with height and width as Fill_Parent .Anyone can guide how I can solve this issue thing ?

Scroll a View and refresh content

I use the following user interface:
A parent relative layout parentLayout with the dimensions 800x600 (width x height)
A second relative layout childLayout, which is a child of the parent layout.
It has the dimensions 800x1000, i.e. it is larger than the parent layout.
parentLayout.addView(childLayout);
My goal: Scrolling childLayout by using childLayout.scrollTo(x,y).
When I use childLayout.scrollTo(x,y), Android scrolls childLayout but doesn't refresh (redraw) it. The effect is, that childLayout is cut to the same dimensions as parentLayout.
Unfortunately, the following solutions don't solve the problem:
childLayout.scrollTo(x,y);
childLayout.invalidate();
childLayout.requestLayout();
Any ideas how to solve this problem?

You can use parentLayout as ScrollView instead of RelativeLayout and keep childLayout as RelativeLayout.

Centering a scroll view

I'm trying to have a ScrollView centered top to bottom within its parent, but I'd also like the ScrollView to be no taller than the height of it's child. The child's height is variable. If there is room, the ScrollView should stretch to be exactly the height of it's child. Any suggestion on how to set up this layout?

Put the ScrollView inside a android:layout_height="match_parent" RelativeLayout.
set the ScrollView to android:layout_centerVertical="true".
Set the ScrollView's height to android:layout_height="wrap_content".
This should get you a centered scrollview that is up to but no taller than the relativelayout that contains it.
Out of curiosity, why do you not want the scrollview set to fill_parent/fillViewport? I would suggest doing that, and simply centering the content of the scrollview instead.