androidandroid-layoutandroid-toolbarandroid-coordinatorlayout

Reputation: 4719

Scrolling with Collapsing Toolbar and Tabs

I'm trying to make a layout with a CollapsingToolbarLayout which has scroll|exitUntilCollapsed flag, and a TabLayout which has scroll|enterAlways scrollFlag property. Basically I want my toolbar to be pinned and show and hide the tabs while scrolling. I've modified the cheesesquare app from https://github.com/chrisbanes/cheesesquare. Here is my layout xml;

<?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:id="@+id/main_content"
    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.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_scrollFlags="scroll|enterAlways"
                app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

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

    </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:layout_height="wrap_content"
        android:layout_width="wrap_content"
        app:layout_anchor="@id/appbar"
        app:layout_anchorGravity="bottom|right|end"
        android:src="@drawable/ic_discuss"
        android:layout_margin="@dimen/fab_margin"
        android:clickable="true"/>

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

And here is the result;

The tabs are not positioned properly. And they don't care about the enterAlways property.

Upvotes: 12

Answers (5)

Thracian

Reputation: 67473

I built two samples with parallax and one with RecyclerView on top of AppbarLayout

One with only parallax is

<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/htab_maincontent"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">
    <!--
    OUTLINE
    <CoordinatorLayout>
        <AppbarLayout>
               <CollapsingToolbarLayout>
                    <ImageView/>
                 <Toolbar/>
                 <TabLayout/>
            </CollapsingToolbarLayout>
        </ AppbarLayout >
        <NestedScrollView/>
    </CoordinatorLayout>
    -->
    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appbarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbar"
            android:layout_width="match_parent"
            android:layout_height="256dp"
            android:fitsSystemWindows="true"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:contentScrim="?attr/colorPrimary">

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

            <androidx.appcompat.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                android:layout_gravity="top"
                android:layout_marginBottom="?attr/actionBarSize" />

            <com.google.android.material.tabs.TabLayout
                android:id="@+id/tabLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:background="@android:color/transparent"
                app:tabIconTint="#F57C00"
                app:tabIndicatorColor="#F57C00"
                app:tabIndicatorHeight="4dp"
                app:tabMode="scrollable"
                app:tabSelectedTextColor="#F5F5F5"
                app:tabTextColor="#FFE0B2" />

        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPager2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

And the one that RecyclerView above AppbarLayout is

<?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/htab_maincontent"
    android:layout_width="match_parent"
    android:background="#EEEEEE"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">
    <!--
    OUTLINE
    <CoordinatorLayout>
        <AppbarLayout>
               <CollapsingToolbarLayout>
                    <ImageView/>
                 <Toolbar/>
                 <TabLayout/>
            </CollapsingToolbarLayout>
        </ AppbarLayout >
        <NestedScrollView/>
    </CoordinatorLayout>
    -->
    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbar"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            android:fitsSystemWindows="true"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:contentScrim="?attr/colorPrimary">

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

            <androidx.appcompat.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                android:layout_gravity="top"
                android:layout_marginBottom="?attr/actionBarSize" />

            <com.google.android.material.tabs.TabLayout
                android:id="@+id/tabLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:background="@android:color/transparent"
                app:tabIconTint="#F57C00"
                app:tabIndicatorColor="#F57C00"
                android:translationY="-30dp"
                app:tabIndicatorHeight="4dp"
                app:tabMode="scrollable"
                app:tabSelectedTextColor="#F5F5F5"
                app:tabTextColor="#FFE0B2" />

        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/constraintLayout"
        app:behavior_overlapTop="30dp"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <androidx.viewpager2.widget.ViewPager2
            android:id="@+id/viewPager2"
            android:layout_width="match_parent"
            android:background="#fff"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_height="match_parent" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

And setting TabLayout translationY on scroll with

// Check if scrolling up or down
   var initTransitionY = tabLayout.translationY
    tabLayout.post {
        initTransitionY = tabLayout.translationY
    }

appbar.addOnOffsetChangedListener(AppBarLayout.OnOffsetChangedListener { appBarLayout, verticalOffset ->

    //Check if the view is collapsed
    if (abs(verticalOffset) >= appbar.totalScrollRange) {
        collapsingToolbar.title = "Collapsed"
    } else {
        collapsingToolbar.title = ""
    }

        tabLayout.translationY =
            initTransitionY + initTransitionY * (verticalOffset / appBarLayout.totalScrollRange.toFloat())

})

For full samples and other samples you can check out this repo

Upvotes: 1

Tirupati Rao

Reputation: 615

Hey this may solve your problem.

just add android:layout_gravity="bottom" to tablayout and android:gravity="top" to toolbar.

Upvotes: 20

Ferdous Ahamed

Reputation: 21766

Remove attribute app:layout_behavior="@string/appbar_scrolling_view_behavior" & app:layout_scrollFlags="scroll|enterAlways" from android.support.design.widget.TabLayout and add attribute android:layout_gravity="bottom".
Also set android.support.v7.widget.Toolbar height as 104(Toolbar+TabLayout height) to show both Toolbar and TabLayout during collapsed state.

Here is an working example:

<?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:id="@+id/container"
    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="256dp"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:titleEnabled="false">

            <ImageView
                android:id="@+id/image_header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                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="104dp"
                android:minHeight="?attr/actionBarSize"
                android:gravity="top"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:titleMarginTop="13dp" />


            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                app:tabGravity="fill"
                app:tabMode="scrollable"
                style="@style/MyCustomTabLayout"/>
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        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_map"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:backgroundTint="#f44336"
        android:src="@drawable/ic_maps_my_location" />

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

Hope this will help~

Upvotes: 5

Henry

Reputation: 17861

I am a bit unclear on what is to be achieved here.

Do you not want the TAB to move up and down while scrolling? If so, you want to put the TabLayout outside the CollapsingToolbarLayout. Because anything that you put inside the CollapsingToolbarLayout, will move on scrolling.

From the comment you have put, I have modified your xml to imitate that of the YouTube screen. The toolbar is put outside the coordinator layout since it's pinned permanently and is not affected by the scrolling. Something that's worth mentioning is "One note: all views using the scroll flag must be declared before views that do not use the flag. This ensures that all views exit from the top, leaving the fixed elements behind." This is taken from the android blogpost http://android-developers.blogspot.in/2015/05/android-design-support-library.html. This is why I have moved the toolbar out of the AppBarLayout.

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"/>

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/main_content"
        android:layout_below="@id/toolbar"
        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.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_scrollFlags="scroll|enterAlways"
                app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

        </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.CoordinatorLayout>

</RelativeLayout>

I have put the TabLayout static, but you can make it scrollable. If this is not what you are looking for, kindly explain pictorially what is to be achieved here. I will be glad to help.

Upvotes: 3

Mohammad Hossein Gerami

Reputation: 1388

add android:layout_gravity="bottom" to android.support.design.widget.TabLayout

Upvotes: 0

Scrolling with Collapsing Toolbar and Tabs

Answers (5)

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