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androidandroid-layoutandroid-design-libraryandroiddesignsupport

ImageView in CollapsingToolbarLayout not covering full height?

I have some issues trying to implement the new CollapsingToolbarLayout. Scrolling, expanding and collapsing do work fine, but my ImageView (no matter what type of resource I set) does not cover the full height of the expanded toolbar. See here:

expanded collapsed

Here I set android:src="@color/red" on the image view, but it never covers the real toolbar. It doesn't work with bitmaps either. I am posting my layout below.

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <!-- content -->
    <android.support.design.widget.CoordinatorLayout
        android:fitsSystemWindows="true"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <android.support.design.widget.AppBarLayout
            android:layout_height="@dimen/appbar_expanded_height"
            android:layout_width="match_parent"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            android:fitsSystemWindows="true">
            <android.support.design.widget.CollapsingToolbarLayout
                android:layout_height="match_parent"
                android:layout_width="match_parent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed"
                app:expandedTitleMarginStart="48dp"
                app:expandedTitleMarginEnd="64dp"
                app:contentScrim="?attr/colorPrimary"
                android:fitsSystemWindows="true">

                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fitsSystemWindows="true"
                    android:src="@color/red_600"
                    android:scaleType="centerCrop"
                    app:layout_collapseMode="parallax"
                    />
                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    app:layout_collapseMode="pin"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize">
                </android.support.v7.widget.Toolbar>

            </android.support.design.widget.CollapsingToolbarLayout>
        </android.support.design.widget.AppBarLayout>

        <!-- I load fragments here -->
        <FrameLayout
            android:id="@+id/fragment_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
    </android.support.design.widget.CoordinatorLayout>

    <!-- nav drawer -->
    <fragment
        android:layout_width="@dimen/drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"/>
</android.support.v4.widget.DrawerLayout>

Seems to me that the only difference with, for example, the cheese-Chris Banes-app, is that I'm giving app:layout_behavior to a FrameLayout. However, inside that frame I load fragments that have a NestedScrollView as the root view, and this seems to work fine.

Solution

  • I found the blue strip was the toolbar background. Namely, I had:

    <item name="toolbarStyle">@style/MyToolbarStyle</item>

    in my theme, and:

    <style name="MyToolbarStyle">
    <item name="android:background">?attr/colorPrimary</item>
</style>

    I used to have this to tint toolbars with colorPrimary. However if you want to move to the design library, you should get rid of it: the collapsed toolbar color is already managed by the app:contentScrim attribute on the CollapsingToolbarLayout.