Hide/Show Toolbar programmatically on CoordinatorLayout

Question

When I scroll my RecycleView ToolBar hide or show (with animation).

How I can return ToolBar back programmatically?

Answer 1

Is that what you looking for?

Toolbar toolbar = findViewById(R.id.toolbar);  // or however you need to do it for your code
AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
params.setScrollFlags(0);  // clear all scroll flags

link: How to enable/disable toolbar scrolling programmatically when using design support library

In order to hide the Toolbar your can just do something like this:

toolbar.animate().translationY(-toolbar.getBottom()).setInterpolator(new AccelerateInterpolator()).start();

If you want to show it again you call:

toolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator()).start();