How to disable scrolling of AppBarLayout in CoordinatorLayout?

Question

I have MapFragment with parallax effect inside AppBarLayout:

I want to disable scrolling on AppBarLayout, because it

Answer 1

You can accomplish this by defining a custom app:layout_behavior in xml. With this approach you don't have to worry about getting a reference to the LayoutParams and doing null checks.

Then create a custom class that extends from AppBarLayout.Behavior.

public class FixedAppBarLayoutBehavior extends AppBarLayout.Behavior {

  public FixedAppBarLayoutBehavior(Context context, AttributeSet attrs) {
    super(context, attrs);

    setDragCallback(new DragCallback() {
      @Override public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
        return false;
      }
    });
  }
}

Updated with Kotlin version:

class FixedAppBarLayoutBehavior(context: Context, attrs: AttributeSet) : AppBarLayout.Behavior(context, attrs) {
  init {
    setDragCallback(object : DragCallback() {
      override fun canDrag(appBarLayout: AppBarLayout): Boolean = false
    })
  }
}