Fling smoothly AppBarLayout with NestedScrollView using AppBarLayout.Behavior

Question

I have an AppBarLayout and NestedScrollView. I want the NestedScrollView whenever it scroll down, the AppBarLayout should also expand gracefully, without the NestedScrollVie

Answer 1

You Should Check for NestedScrollView And NestedScrollingChild

    if (target instanceof NestedScrollView && Math.abs(velocityY) > 8000) {
        consumed = false;
    }


    if (target instanceof NestedScrollingChild && Math.abs(velocityY) > 8000) {
        consumed = false;
    }

Answer 2

The problem has been solved with the libraries in this repository.

(https://developer.android.com/topic/libraries/support-library/setup.html)

allprojects {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}