Need to disable expand on CollapsingToolbarLayout for certain fragments

Question

I have a AppCompatActivity that controls replacing many fragments. Here is my layout for it.

activity_main.xml

Answer 1

Find the AppBarLayout id as like this.

appBarLayout = (AppBarLayout) findViewById(R.id.appbar);

Disable expand on CollapsingToolbarLayout for certain fragments

appBarLayout.setExpanded(true,true);

Enable expand on CollapsingToolbarLayout for certain fragments

appBarLayout.setExpanded(false,true);

Hope it will help you !!