Changing Toolbar and CollapsingToolbarLayout scroll flags programmatically

android android-layout android-fragments material-design android-support-design
syloc picture syloc · Sep 6, 2015 · Viewed 7.9k times · Source

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?

Answer

natario picture natario · Sep 6, 2015

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

Related questions

How do I get the currently displayed fragment?

I am playing with fragments in Android. I know I can change a fragment by using the following code: FragmentManager fragMgr = getSupportFragmentManager(); FragmentTransaction fragTrans = fragMgr.beginTransaction(); MyFragment myFragment = new MyFragment(); //my custom fragment fragTrans.replace(android.R.id.content, myFragment); …

Read More
Error inflating class fragment

I get the Error Unable to start activity ComponentInfo{de.androidbuch.activiti/de.androidbuch.activiti.task.Activity}: android.view.InflateException: Binary XML file line #11: Error inflating class fragment when I switch via the portrait and the landscape mode. I'm using …

Read More
How to implement a ViewPager with different Fragments / Layouts

When I start an activity which implements viewpager, the viewpager created various fragments. I want to use different layouts for each fragment, but the problem is that viewpager shows only two layouts at the max (second layout on all of …

Read More