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Changing Toolbar and CollapsingToolbarLayout scroll flags programmatically

I have a single Activity android app with lots of fragments. When I'm showing a list screen I want to use the Toolbar with the, app:layout_scrollFlags="scroll|enterAlways" property. And in the detail fragments I want to use the CollapsingToolbarLayout with an image in it. Since it's a single Activity app, I have only one Toolbar. Is it possible to modify my layout programmatically to suit both cases?

like image 979
syloc Avatar asked Sep 05 '15 23:09

syloc


2 Answers

I found it working

public void disableToolBarScrolling() {
    CollapsingToolbarLayout toolbar = findViewById(R.id.collap_toolbar);
    AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
    params.setScrollFlags(0);
}

public void enableToolBarScrolling() {
    CollapsingToolbarLayout toolbar = findViewById(R.id.collap_toolbar);
    AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
    params.setScrollFlags(SCROLL_FLAG_SCROLL | SCROLL_FLAG_ENTER_ALWAYS);
}
like image 56
Vivek Pratap Singh Avatar answered Nov 11 '22 08:11

Vivek Pratap Singh


Yes. Let's say you are going from the CollapsingToolbarLayout fragment to the Toolbar one.

  1. You collapse your AppBarLayout using AppBarLayout.setExpanded(false);

  2. You change the scroll flags to fit your needs.

    AppBarLayout.LayoutParams p = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
    p.setScrollFlags(...);
    toolbar.setLayoutParams(p);
    

    Same goes for the CollapsingToolbarLayout if necessary. I guess it should be something like:

    collapsingToolbarParams.setScrollFlags(0); //no flags for ctl
    toolbarParams.setScrollFlags(SCROLL_FLAG_SCROLL | SCROLL_FLAG_ENTER_ALWAYS); //new flags for toolbar
    
like image 34
natario Avatar answered Nov 11 '22 08:11

natario