scroll background image while scrolling information - android

Hi i have no idea how to perform that kind of effect..
hi an example of what i want
The efect is, having a background image or another similar layout, scroll another layout and show the background moving.
Can someone give me a link with some information or documentation?
Thank you in advance

You can use this library. You also have a sample app with code, go through it. https://github.com/nirhart/ParallaxScroll

It's look like : ObservableScrollView
https://github.com/ksoichiro/Android-ObservableScrollView

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simply reply. i can't add comment at your post....
if want more hint reply me.
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