Collapsing Toolbar Like Google Play Store

Question

I want to implement a collapsing toolbar like google Play Store. I have achieved functionality somewhat but that is only working for portrait Screen. Here is a sample of screens

Answer 1

In this pretty similar issue: collapsing toolbar layout like google play store, you would find an answer as below:

View inside CollapsingToolbarLayout no need to set app:layout_scrollFlags. No effect. Base on my code, change app:layout_scrollFlags in CollapsingToolbarLayout to app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed" and set minHeight for it.

As your toolbar is "pin", so enterAlwaysCollapsed will call it when you scroll down.

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

<android.support.design.widget.AppBarLayout
    android:id="@+id/appBarLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fitsSystemWindows="true">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/seffafCollapsingToolbarLayout"
        android:layout_width="match_parent"
        android:layout_height="240dp"
        android:minHeight="?attr/actionBarSize"
        app:expandedTitleMarginEnd="164dp"
        app:expandedTitleMarginStart="148dp"
        app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed">

        <ImageView
            android:id="@+id/header"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/haber_icerik_resim"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/haber_toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:theme="@style/ToolbarColoredBackArrow"
            app:layout_collapseMode="pin"/>

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

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


<android.support.v7.widget.RecyclerView
    android:id="@+id/newsRecyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical"
    android:clickable="true"
    android:background="@color/mainBackground"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

In the comment to that post, you would find also a hint:

add app:contentScrim="?attr/colorPrimary" to your collapsingtoolbarlayout. It is no need two toolbars to implement this effect

EDIT: Here you would find an interview with a guy responsible for Google Play Store, he's talking about how he build design in Play Store App:

[UDACITY] Interview with Kirill Grouchnikov, part 1

[UDACITY] Interview with Kirill Grouchnikov, part 2

Hope it help