android - Using windowTranslucentStatus with CollapsingToolbarLayout

Question

I'm trying to get a similar effect to what is seen on google play.

I've got the below layout to show a transparent toolbar with an image behind it. When the user scrolls there is a parallax effect on the imageview as it scrolls off the screen. The toolbar returns when ever the user scrolls up, with the imageview only returning when the user gets to the lop of the list.

This all works great.

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <android.support.design.widget.AppBarLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:background="@color/background_material_dark">
        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbarLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:minHeight="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
            app:statusBarScrim="#09b"
            app:contentScrim="#09f">
            <ImageView
                android:id="@+id/img"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:src="@drawable/location_banner"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.7"
                />
            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_height="?attr/actionBarSize"
                android:layout_width="match_parent"
                app:layout_collapseMode="pin"
                android:fitsSystemWindows="true"
                app:theme="@style/ThemeOverlay.AppCompat.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Dark"/>
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

</android.support.design.widget.CoordinatorLayout>

The issue

When I set windowTranslucentStatus to true. The contents in the view move up to be under the status bar, but the contents of the CollapsingToolbarLayout moves up twice the height of the status bar(CollapsingToolbarLayout retains correct height).

This means some of the top of the image is cut off and the actionbar now appears under the status bar instead of below it. As a side effect of this there is now padding at the bottom of the CollapsingToolbarLayout the same height as the status bar

This is what it looks like without windowTranslucentStatus. Everything here works fine

windowTranslucentStatus set to true

User scrolling up from lower in list (not at top)

Answer 1

There has now been an update to the design library. I'm guessing that the issue posted above was a bug.

If you update the design library to the latest version this issue no longer occurs.

I have now removed all fitsSystemWindows="true" except for the ImageView (as that needs to display under the status bar).

I have also removed the minus padding from the Toolbar.

This is my theme for 21+

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowTranslucentStatus">true</item>
    <item name="android:windowActionBarOverlay">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:textColorPrimary">@android:color/white</item>
</style>

It all works as expected now