Develop Reference

AppBarLayout doesn't work correctly with the view pager

I am newbie to AppBarLayout and I got some problems. Firstly, I have a design. I got CoordinatorLayout, which contains AppBarLayout( with the CollapsingToolbarLayout insides with Image View ) and Below is ViewPager (id = newOrder_viewPager ). My aim is, I want to scroll vertically the view Pager, then ImageView of AppBarLayout want to be collapsing. Please help me. Here my xml code..
<?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:background="#android:color/background_light"
android:fitsSystemWindows="true"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true"
>
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
>
<ImageView
android:id="#+id/main.backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:src="#drawable/office_back"
app:layout_collapseMode="parallax"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.CardView
android:layout_margin="2dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
app:cardCornerRadius="8dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/newOrder_viewPager"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v7.widget.CardView>
</android.support.design.widget.CoordinatorLayout>

Check out the Cheesesquare Sample project on github.
It has examples on how to use AppBarLayout with ViewPager.
Specifically, look at the CheeseDetailActivity (and its layout).

CollapsingToolBarLayout has dual toolbar

I am having issues with implementing CollapsingToolbarLayout. I have this problem:
Yes, I've got to place the view in the layout, but it collapses below the original toolbar (or ActionBar for that matter) as shown in the image below. I have no idea how to fix this.
Thanks for any help. I am using Android Studio 2.1.1.
Here is my layout file:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ArticleActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="#+id/app_bar_layout"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/collapsing_toolbar"
app:layout_scrollFlags="scroll|enterAlways"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="#+id/featuredImage"
android:src="#mipmap/ic_launcher"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:contentDescription="#string/article_image"/>
<android.support.v7.widget.Toolbar
android:id="#+id/tool_bar"
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>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_scrollFlags="scroll|enterAlways"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<WebView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/article_container" />
</FrameLayout>
<android.support.design.widget.FloatingActionButton
android:id="#+id/share"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#mipmap/ic_share_variant" />
</android.support.design.widget.CoordinatorLayout>

I found out where I went wrong. I had left out the theme statement in the manifest. All I had to do was add the line android:theme="AppTheme.NoActionBar" to my activity in the manifest.
However, this brought up two new issues:
The new ToolBar scrolls out of view (does not stick to the top.)
The back button that should lead me to my previous activity is gone. However, I'll ask this as a separate question if I do not get the solutions from researching.

How can put a text at the center in CollapsingToolbarLayout and Toolbar?

I have a title on the left side in a Toolbar and in a CollapsingToolbarLayout. I want to move it to the center horizontally.
Please help me.
Pictures of my current layout and what I want to achieve:
Code:
<android.support.design.widget.CoordinatorLayout
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:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.sagar.materialdesigndemo.CollapsingToolbarFragment">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar_layout"
android:layout_width="match_parent"
android:layout_height="256dp"
app: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:elevation="#dimen/toolbar_elevation"
app:expandedTitleTextAppearance="#style/HeaderTitleStyle"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/flexible_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/backmain"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:titleTextAppearance="#style/ToolbarTitleStyle"
android:layoutDirection="rtl"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Set this parameter in your CollapsingToolbarLayout
app:expandedTitleGravity="center_horizontal"

To achieve this, you can get reference to the collapsing toolbar from the corresponding Java class and set the gravity of your title:
CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
//now that you have access to your toolbar, set the directions.
collapsingToolbar.setExpandedTitleGravity(Gravity.CENTER_HORIZONTAL);
collapsingToolbar.setCollapsedTitleGravity(Gravity.CENTER_HORIZONTAL);

CollapsibleToolbarLayout line below header image and back button not showing

I have implemented CollapsibleToolbarLayout as below.
<android.support.design.widget.CoordinatorLayout 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">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
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"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
app:expandedTitleMarginEnd="40dp"
app:expandedTitleMarginStart="20dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imgPoster"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:background="#drawable/place_holder_land" />
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/detailsGradient" />
<ImageView
android:id="#+id/play"
android:layout_width="wrap_content"
android:visibility="invisible"
app:layout_collapseMode="parallax"
android:layout_gravity="center"
android:src="#drawable/ic_play_movie"
android:layout_height="wrap_content" />
</FrameLayout>
<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:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
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:layout_gravity="fill_vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
...LinearLayout omitted...
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:clickable="true"
android:src="#drawable/ic_file_download"
app:layout_anchor="#+id/appbar"
app:layout_anchorGravity="bottom|right|end" />
</android.support.design.widget.CoordinatorLayout>
I add the image view in a framelayout in the toolbar so that i can have a overlay on the image and a gradient to make the toolbar text visible on some images
But this color line is coming just below the image (see screenshot) on adding the framelayout. If I remove the line
android:fitsSystemWindows="true"
from appbarlayout then the the color line disapperas but toolbar also scrolls away from the view...
Also to show the back button on the toolbar I have added the below code in OnCreate still it does not show
toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.anim_toolbar);
SetSupportActionBar(toolbar);
SupportActionBar.SetDisplayHomeAsUpEnabled(true);
SupportActionBar.SetHomeButtonEnabled(true);
SupportActionBar.Title = content.Title;
toolbar.SetNavigationIcon(Resource.Drawable.ic_action);
collapsingToolbar = FindViewById<CollapsingToolbarLayout>(Resource.Id.collapsing_toolbar);
collapsingToolbar.SetTitle(content.Title);
Thanks...

OK got it now had to remove
android:fitsSystemWindows="true"
from
<android.support.design.widget.CoordinatorLayout
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">
everything good now
Thanks

Consider adding a fixed width to your app bar layout
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">

CollapsingToolbarLayout not working(collapsing)when scrolled

I am trying to create a CollapsingToolbarLayout and below it a listview, when the listview is scrolled the Toolbar should collapse, but its not working when scrolled the Toolbar is not collapsing.
Used this tutorial: http://android-developers.blogspot.in/2015_05_01_archive.html
Note: The FrameLayout contains the listview
<LinearLayout 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="wrap_content"
android:orientation="vertical"
android:scrollbars="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="192dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbara"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
The framelayout code:
<RelativeLayout 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"
tools:context="ranjithnair02.com.supporttest.BlankFragment">
<ListView
android:id="#+id/rcyv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="10dp"
android:layout_marginRight="10dp"
android:src="#android:drawable/ic_search_category_default"
app:borderWidth="0dp"
app:elevation="5dp"
app:rippleColor="#color/wallet_highlighted_text_holo_light" />
</RelativeLayout>

You should use RecyclerView instead of ListView
Note:
don't forget to update RecyclerView in Gradle file.
compile 'com.android.support:recyclerview-v7:22.2.0'

I did an example by using RecyclerView instead. The source code could be found here:
https://github.com/jiahaoliuliu/MaterialDesignSample/tree/collapsingToolbars
There are a couple of things that you should take into account and the post does not says.
Use CoordinatorLayout as the main layout
Use a theme without ActionBar and set the toolbar as actionBar instead. You can do it by creating a special theme for the activity like this:
<!-- Indigo without actionbar when toolbar is used -->
<style name="IndigoWithoutActionBar" parent="Indigo">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
And in the AndroidManifest.xml file, do the follow:
<activity
android:name=".CollapsingToolbarActivity"
android:label="#string/app_name"
android:theme="#style/IndigoWithoutActionBar"
>
</activity>
Once this is done, set it on the Java code:
// Actionbar
final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Here is a functional xml code that I use.
<?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/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/detail_backdrop_height"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/simpleRecyclerView"
android:layout_height="match_parent"
android:layout_width="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>
If this is not enough for you, you can follow the code of Chris Banes here:
https://github.com/chrisbanes/cheesesquare

For my case : I dint give height to my Toolbar .
It was wrap_content. If thats the case then try to fix the height of the Toolbar using :-
android:layout_height="?attr/actionBarSize"

You need to add two things to the list view and it will work
android:nestedScrollingEnabled="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
My working XML code is
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#color/black"
tools:context="com.example.pr20020897.samplapp.DisplayAllDataActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="200dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:collapsedTitleTextAppearance="#style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
app:expandedTitleTextAppearance="#style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
app:expandedTitleMarginStart="72dp"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/toolbar_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_collapseMode="parallax"
android:scaleType="centerCrop"
android:src="#drawable/db"
android:contentDescription="image" />
<android.support.v7.widget.Toolbar
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:navigationIcon="#drawable/ic_arrow_back"
app:contentInsetStart="72dp"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<ListView
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/listView"
android:nestedScrollingEnabled="true"
android:scrollbars="none"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="#FF0000"
android:background="#color/black"
android:dividerHeight="1dp">
</ListView>
</android.support.design.widget.CoordinatorLayout>
Hopefully help someone.

The problem is the RelativeLayout. Try replacing the FrameLayout with the ListView and then the FloatingButton. All wrapped in a CoordinatorLayout of course.

<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>