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androidstylesthemesandroid-appbarlayout

Change AppBarLayout theme programmatically?

I have an AppBarLayout defined as such

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

However, sometimes I change the theme for the application and I also want to change it, and its children's. I have been partially successful by doing this:

    AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.appbar_layout);
    appBarLayout.getContext().setTheme(R.style.AppTheme_Dark_AppBarOverlay);
    appBarLayout.invalidate();

However, the TextView for the title is not getting the theme settings.

How can I set it?

Solution

  • The solution to this was to use a ViewStub (http://developer.android.com/reference/android/view/ViewStub.html) that held two versions of my AppBarLayout: Light and Dark.

    Then in onCreate I checked which theme was being loaded and replaced the ViewStub with the correct R.layout. I don't know why this is so difficult, or why you can't change the 'theme' for sub-views when you change the theme for the entire Activity, it's really perplexing.

    In any case, this was the only solution that worked for me.