添加固定的标签栏固定在滚动内容的顶部？

Question

I tried this answer, but I could not achieve the same look & behavior as my current main activity.

What changes should I make to my existing main activity to add a fixed tab bar pinned to top with scrolled content like in the image below?

Here's a .GIF of my current main activity: i.stack.imgur.com/Yj0cv.gif

Here's a link to the full project called android : https://github.com/firebase/friendlychat/tree/master/android

Here's styles.xml :

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <item name="android:colorButtonNormal">@drawable/button_selector</item>
        <item name="colorButtonNormal">@drawable/button_selector</item>
        <item name="android:buttonStyle">@style/FriendlyButtonStyle</item>
    </style>

    <style name="FriendlyButtonStyle" parent="Widget.AppCompat.Button">
        <item name="android:textColor">@color/colorTitle</item>

    </style>
</resources>

Here's activity_main.xml :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.google.firebase.codelab.friendlychat.MainActivity">

    <com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentTop="true"
        ads:adSize="BANNER"
        ads:adUnitId="@string/banner_ad_unit_id">
    </com.google.android.gms.ads.AdView>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/messageRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/linearLayout"
        android:layout_below="@+id/adView"/>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/linearLayout">

        <ImageView
            android:id="@+id/addMessageImageView"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:src="@drawable/ic_add_black_24dp"/>

        <EditText
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:id="@+id/messageEditText"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"/>

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="SEND"
            android:enabled="false"
            android:id="@+id/sendButton"
            android:layout_gravity="bottom"/>

    </LinearLayout>

    <ProgressBar
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"/>
</RelativeLayout>

Answer 1

Put your fixed view's in RelativeLayout and move scrolling content inside CoordinatorLayout . Like this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    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:layoutDirection="ltr"
    tools:context=".MainActivity">

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/linearLayout">

        <android.support.design.widget.AppBarLayout
            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"
                app:layout_scrollFlags="scroll|enterAlways"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

            <android.support.design.widget.TabLayout
                android:id="@+id/tab_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:theme="@style/AppTheme.PopupOverlay"
                app:tabMode="fixed" />

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

        <android.support.v4.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <com.google.android.gms.ads.AdView
                    android:id="@+id/adView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerHorizontal="true"
                    android:layout_alignParentTop="true"
                    ads:adSize="BANNER"
                    ads:adUnitId="@string/banner_ad_unit_id">
                </com.google.android.gms.ads.AdView>

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/messageRecyclerView"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:nestedScrollingEnabled="false"
                    android:layout_below="@+id/adView" />
            </RelativeLayout>
        </android.support.v4.widget.NestedScrollView>

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

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/addMessageImageView"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:src="@drawable/ic_add_black_24dp" />

        <EditText
            android:id="@+id/messageEditText"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_weight="1" />

        <Button
            android:id="@+id/sendButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:enabled="false"
            android:text="SEND" />
    </LinearLayout>

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true" />
</RelativeLayout>

Answer 2

Google has Design support library and with it you can implement Collapsing Toolbar and you do not need any 3rd party libraries!!

In addition to pinning a view, you can use app:layout_collapseMode="parallax" (and optionally app:layout_collapseParallaxMultiplier="0.7" to set the parallax multiplier) to implement parallax scrolling (say of a sibling ImageView within the CollapsingToolbarLayout)

And as example you can use this:

<android.support.design.widget.AppBarLayout
    android:layout_height="186dp"
    android:layout_width="match_parent">
<android.support.design.widget.CollapsingToolbarLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">
    <android.support.v7.widget.Toolbar
            android:layout_height="?attr/actionBarSize"
            android:layout_width="match_parent"
            app:layout_collapseMode="pin"/>
    </android.support.design.widget.CollapsingToolbarLayout>

And do not forget to add compile "com.android.support:design:25.3.1" in your module build.gradle

UPDATE 1: First of all, you need to create a CoordinatorLayout .

All the new components use a new concept called Behavior that is used by the Coordinator Layout to take some actions based on different interactions.

<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.CoordinatorLayout>

You can use fitsSystemWindows on any item you want to be painted below the status bar.

Then you need to add an AppBarLayout :

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

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

And then inside that, you can add something like:

<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"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginStart="48dp"
        app:expandedTitleMarginEnd="64dp"
        android:fitsSystemWindows="true">

        <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>

Answer 3

Just created behavior, what you want. Shouldn't be so complicated. So here is main XML for all Views. But I also have already created project for this sample, please write here, if I need to share full project.

SCREENS

MAIN 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:background="@android:color/white">

    <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"
        app:elevation="0dp">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />


        <android.support.design.widget.TabLayout
            android:id="@+id/tab_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/toolbar"
            android:background="?attr/colorPrimary"
            android:minHeight="?attr/actionBarSize"
            android:scrollbars="none"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:layout_collapseMode="pin"
            app:tabMode="fixed" />


    </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.CoordinatorLayout>

TO YOUR EXAMPLE

I share here another example, which should suite your code. I attached all view Ids for your examples. Check it.

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/tools"
    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:background="@android:color/white">

    <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"
        app:elevation="0dp">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />


        <com.google.android.gms.ads.AdView
            android:id="@+id/adView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_below="@+id/toolbar"
            android:layout_centerHorizontal="true"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            ads:adSize="BANNER"
            ads:adUnitId="@string/banner_ad_unit_id"
            app:layout_collapseMode="pin"></com.google.android.gms.ads.AdView>


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

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/messageRecyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

        <LinearLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom |center_horizontal"
            android:layout_marginBottom="100dp"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/addMessageImageView"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:src="@android:drawable/ic_dialog_alert" />

            <EditText
                android:id="@+id/messageEditText"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:layout_weight="1" />

            <Button
                android:id="@+id/sendButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:enabled="false"
                android:text="SEND" />

        </LinearLayout>

        <ProgressBar
            android:id="@+id/progressBar"
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center_horizontal"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="100dp"
            android:layout_centerVertical="true" />

    </FrameLayout>


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

Answer 4

try above code

Style.xml

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>

    <item name="android:colorButtonNormal">@drawable/button_selector</item>
    <item name="colorButtonNormal">@drawable/button_selector</item>
    <item name="android:buttonStyle">@style/FriendlyButtonStyle</item>
</style>

<style name="FriendlyButtonStyle" parent="Widget.AppCompat.Button">
    <item name="android:textColor">@color/colorTitle</item>

</style>

here if you don't want to change property to 'NoActionBar' then alternatively set it in AndroidManifest.xml file like above

<activity android:name=".MainActivity"
        android:theme="@style/Theme.AppCompat.NoActionBar"/>

activity_main.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.google.firebase.codelab.friendlychat.MainActivity"
    android:id="@+id/coordinatorLayout">

    <android.support.design.widget.AppBarLayout
        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:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabMode="scrollable"
            app:tabGravity="center"
            app:tabTextAppearance="@android:style/TextAppearance.Widget.TabWidget"
            app:tabSelectedTextColor="@android:color/white"
            app:tabTextColor="@android:color/white"
            app:tabIndicatorHeight="2dp"
            app:tabIndicatorColor="@android:color/white"/>

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


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:context="com.google.firebase.codelab.friendlychat.MainActivity">

        <com.google.android.gms.ads.AdView
            android:id="@+id/adView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            app:adSize="BANNER"
            app:adUnitId="@string/banner_ad_unit_id">
        </com.google.android.gms.ads.AdView>

        <include
            layout="@layout/maincontent"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/adView"/>


        <LinearLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:orientation="horizontal"
            android:layout_marginBottom="50dp">

            <ImageView
                android:id="@+id/addMessageImageView"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:src="@drawable/ic_add_black_24dp"/>

            <EditText
                android:id="@+id/messageEditText"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:layout_weight="1"/>

            <Button
                android:id="@+id/sendButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:enabled="false"
                android:text="SEND"/>

        </LinearLayout>

        <ProgressBar
            android:id="@+id/progressBar"
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"/>
    </RelativeLayout>

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

maincontent.xml

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/messageRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
       />

</LinearLayout>