Develop Reference

How to use a ViewPager with CollapsingToolbar without using NestedScrollView?

I want to make several fragments in the main activity each having a RecyclerView such that I can swipe between them. Also in this activity, I have a collapsing toolbar on top of all these things.
I tried using the RecyclerView Directly inside the ViewPager but unfortunately the Toolbar didn't Collapse (I think it needs a NestedScrollView)
I added NestedScrollView outside the ViewPager which gave me an Exception on adding new items to any of the RecyclerViews java.lang.IndexOutOfBoundsException which I found to be a bug caused by calling runOnUiThread() but if I loaded data using UI thread it would be too slow
I tried using NestedScrollViews inside each fragment (wrapping the RecyclerViews) but it gave the same exception
Is there any way to collapse the toolbar without NestedScrollView?

Have a look with this layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#color/colorPrimary">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:elevation="0dp">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<LinearLayout
android:id="#+id/lnr_expandView"
android:layout_width="match_parent"
android:layout_height="130dp"
android:minHeight="130dp"
android:orientation="horizontal"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.7">
</LinearLayout>
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
app:collapseIcon="#drawable/ic_back"
app:contentInsetStart="30dp"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay">
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/googlesans_medium"
android:padding="#dimen/pad_15"
android:text="#string/app_name"
android:textColor="#color/text_color"
android:textSize="20sp"
android:visibility="gone" />
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<androidx.viewpager.widget.ViewPager
android:id="#id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</FrameLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Your 2nd parent child layout must contains this attribute for collapse effect;
app:layout_behavior="#string/appbar_scrolling_view_behavior"

Android collapsable layout not working properly

I am using collapsable layout . Here is the main layout for that,
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout android:id="#+id/main_content"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapse_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true">
<ImageView
android:id="#+id/bgheader"
android:layout_width="match_parent"
android:layout_height="300dp"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:background="#drawable/scenary"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:attrs="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
<FrameLayout
android:id="#+id/titleContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center">
<.utils.CustomFontTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Toolbar Title"
android:textColor="#ffffff"
attrs:customFont="handyman_bold"
android:textSize="8pt"
android:layout_marginLeft="-20dp"
android:id="#+id/toolbar_title"/>
</FrameLayout>
<ImageButton
android:id="#+id/btn_ToolBarRightBtn"
android:layout_width="32dp"
android:layout_height="28dp"
android:tag="0"
android:background="#null"
android:scaleType="fitXY"
android:src="#drawable/icon_shopping"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_marginRight="10dp"
/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_gravity="bottom"
android:background="#color/offwhite"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.CoordinatorLayout>
Inside the ViewPager I have a recycler view. Here is what I see when I load the app ,
When I scroll up the recycler view I am seeing this,
I am not sure why I see the gap initially and later it is getting filled with the app primary color. What a I doing here?
Attached animated gif of my screen.
Thanks

One straightforward solution is to use design support library version 23.1.1 This issue happens for design support library 23.2.0 onwards.
compile 'com.android.support:design:23.1.1'
Second solution is removing the line android:fitsSystemWindows="true" from the CoordinatorLayout.
UPDATE :
in both case the toolbar is overlapping the image, so the portion under status bar is not visible
This is happening because CollapsingToolbarLayout class is a child of FrameLayout. So the views you pass in the framelayout will stack upon each other. that's why toolbar is overlapping the image. The simplest solution in your case I found is to put android:layout_marginTop="?attr/actionBarSize" in the ImageView.

There is no app:layout_behavior="#string/appbar_scrolling_view_behavior"in your FrameLayout
<FrameLayout
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/titleContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"

Appbarlayout overlaps with NestedScrollView

I have a coordinator layout, which consists of appbarlayout and nestedscrollview. The problem is that when I open the activity, some part of nestedscrollview is by default hidden behind the expanded action bar (difference shown in the images).
XML File :
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/my_appbar_container"
android:layout_width="match_parent"
android:layout_height="250dp"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="#color/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/ivToolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:scaleType="fitXY"
android:alpha="0.6"
app:layout_collapseParallaxMultiplier="0.7" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_collapseMode="pin"
android:alpha="1.0"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
......
.......
I am not able to figure out what's the issue here, and couldn't find anywhere online. Maybe it's a bug. Please check.

I ran into the same problem, setting the layout height of the NestedScrollView to android:layout_height="wrap_content" fixed it for me.
Hope it helps

I solved this problem by having the NestedScrollView inside a FrameLayout like this
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v4.widget.NestedScrollView
android:background="#color/main_color_white"
android:layout_width="match_parent"
android:layout_height="wrap_content">
...............
.............
</android.support.v4.widget.NestedScrollView>
</FrameLayout>
Or you can try adding a padding to your NestedScrollView like this
<android.support.v4.widget.NestedScrollView
android:background="#color/main_color_white"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="?attr/actionBarSize">
................
................
</android.support.v4.widget.NestedScrollView>

Don't know why but this answer worked on my issue.
Btw I faced with this problem only when I change visibility of any view inside nestedScrollView

Collapsing Toolbar Like Google Play Store

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 screenshot of what i was able to do.
Now what i want to do is when i change my device orientation to LandScape mode it should look Exactly Like This.
So what my main question is how to handle these orientation changes. Is there any official android component available that can do this kind of thing or I will have to Z-index my Layouts to achieve this kind of Layout behavior. Please note that I want the layout to be exactly like this with Margins on Both Sides and Z-indexing on top of picture also the scrolling behavior needs to be exactly like Google Play Store.
I am attaching my sample xml that I have written so far.
<?xml version="1.0" encoding="utf-8"?>
<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/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<com.group3amd.materializeyourapp.widgets.SquareImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/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>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
app:cardElevation="#dimen/spacing_medium"
app:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/spacing_large"
android:layout_marginRight="#dimen/spacing_large"
android:layout_marginTop="#dimen/spacing_large"
android:textAppearance="#style/TextAppearance.AppCompat.Headline" />
<TextView
android:id="#+id/description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/spacing_large"
android:text="#string/lorem_ipsum"
android:textAppearance="#style/TextAppearance.AppCompat.Body1" />
</LinearLayout>
</android.support.v7.widget.CardView>
</FrameLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
style="#style/FabStyle"
app:layout_anchor="#id/app_bar_layout"
app:layout_anchorGravity="bottom|right|end" />
</android.support.design.widget.CoordinatorLayout>

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

CoordinatorLayout using the ViewPager's RecyclerView

I am using the view CoordinatorLayout from android.support.design. I want to attach the app:layout_behavior to the fragment's RecyclerView?
In the example given by Google, they only attach it in the RecyclerView of the same XML file where the CoordinatorLayout was attached.
Is there a way to attach CoordinatorLayout to the fragment's RecyclerView within the ViewPager?
The sample is in this blog post at Android Developers blog.

Chris Banes has posted a sample on Github which shows exactly what you want to do.
Here is the xml file that defines how one can indirectly attach a coordinator layout to the viewpager's fragments.
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|enterAlways" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_done" />
</android.support.design.widget.CoordinatorLayout>
The idea is to let the viewpager have the layout_behavior attribute.

This might be dumb, but it didn't worked due to the fact that the build tool was not updated in the build.gradle of the application version to 22, I was using 21 that is why it is not working as expected to be.
Edit:
Also what SanderTuit said: adding com.android.support:recyclerview-v7:22.2.0 will also solve the problem

Use a FrameLayout and inject your fragment into that FrameLayout. Then set
app:layout_behavior to it. The only thing you need to do is set layout_behavior
to a sibling of AppBayLayout and that sibling will below the toolbar.
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|enterAlways" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

I recently had the same problem mentioned in the post, and the above solutions did not work for me. Luckily I managed to solve it. So just to share I am posting here
The problem was that in my code I had set
recyclerView.setNestedScrollingEnabled(false);
due to which the appbar was not responding to recyclerView's scrolls despite setting the layout_behaviour attribute to the viewPager. Changing the above-mentioned attribute to
recyclerView.setNestedScrollingEnabled(true);
solved the problem and the appbar started responding to the recylerView's scroll.

After a few tests, I found that put the TabLayout outside AppBarLayout, will works, whatever the viewpager's Fragment contains. This is my main xml.
<com.tqmall.legend.konwledge.view.VerticalSwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/swipe_refreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFE6ECF0">
<android.support.design.widget.AppBarLayout
android:id="#+id/kn_main_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="#android:color/black"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<include
layout="#layout/banner_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.9" />
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="#33000000"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.design.widget.TabLayout
android:id="#+id/main_fragment_issue_list_tab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
app:tabGravity="center"
app:tabIndicatorColor="#FF2CA2D5"
app:tabPaddingEnd="30sp"
app:tabPaddingStart="30sp"
app:tabSelectedTextColor="#FF2CA2D5"
app:tabTextColor="#FF4F5354" />
<android.support.v4.view.ViewPager
android:id="#+id/main_fragment_issue_list_pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>

I'm having the same problem, i solved the scrolling but putting toolbar and the tabs inside the app bar and wrap it and the viewpager with a coordinatorlayout.
Also in the layout of my recycle view(to be inflated) i add the layout_behavior. It works but the problem is everything is over each other.
This is my main page
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/music_foot"
>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/view_pager"
/>
<view
android:layout_width="match_parent"
android:layout_height="wrap_content"
class="android.support.design.widget.AppBarLayout"
android:id="#+id/appBar"
>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="#1e88e5"
android:id="#+id/toolbar"
app:layout_scrollFlags="scroll|enterAlways"
></android.support.v7.widget.Toolbar>
<view
android:layout_width="match_parent"
android:layout_height="56dp"
class="com.astuetz.PagerSlidingTabStrip"
android:id="#+id/pager_tabs"
android:layout_below="#+id/appBar"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</view>
and this is my layout for the adapter
<android.support.v7.widget.RecyclerView
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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/recycleView" />
If I get it to work better ill tell you.