Status bar turns white and does not show content behind it

Question

I am trying out AppCompat on Marshmallow. And I want to have a transparent status bar however it turns white. I've tried a couple solutions but they didn't work for me (Transparent status bar not working with windowTranslucentNavigation="false", Lollipop : draw behind statusBar with its color set to transparent). Here's related code.

My styles.xml

<style name="Bacon" parent="Theme.Bacon"/>

<style name="Theme.Bacon" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/theme_primary</item>
    <item name="colorPrimaryDark">@color/theme_primary_dark</item>
    <item name="colorAccent">@color/theme_accent</item>
    <item name="windowActionBar">false</item>
    <item name="windowActionBarOverlay">true</item>
    <item name="windowNoTitle">true</item>
    <item name="android:windowBackground">@color/background_material_light</item>  
</style>

<style name="Theme.Bacon.Detail" parent="Bacon"/>

v21

<style name="Bacon" parent="Theme.Bacon">
    <item name="android:windowDrawsSystemBarBackgrounds">true</item>
</style>

<style name="Theme.Bacon.Detail" parent="Bacon">
    <item name="android:statusBarColor">@android:color/transparent</item>
</style>

Activity

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true" />

</FrameLayout>

Fragment

<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="192dp"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginBottom="32dp"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:statusBarScrim="@color/black_trans80">

        <ImageView
            android:id="@+id/photo"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:contentDescription="@string/photo"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/anim_toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Answer 1

I found the answer in this link:Status Bar Color not changing with Relative Layout as root element

So it turns out we need remove the

      <item name="android:statusBarColor">@android:color/transparent</item>

in styles.xml(v21). And it works just fine for me.