Search code examples
androidandroiddesignsupportandroid-appbarlayout

what is the use of enterAlwaysCollapsed

I am studing Support Design liabrary.I cannot understand the use of enterAlwaysCollapsed.It seems it will influece on pull down,but I tried and find nothing changed. So,what is the use of enterAlwaysCollapsed,could you show me with a demo?

Solution

  • Let me answer it myself. First the activity theme is AppTheme.

        <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

    And then Don't set fitsSystemWindows in xml.
    Last use scroll flag scroll|enterAlways|enterAlwaysCollapsed.
    The final effect is below

    enter image description here