Unable to see Tab Indicator in TabLayout design support library

Question

I am using Material design library and creating layout using CoordinatorLayout ,AppBarLayout ,RecyclerView and TabLayout .

My issue is i am unable to see Tab indicator in Tablayout .Below is my xml file that i am using in AppCompactActivity.

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

        <android.support.v7.widget.RecyclerView
            android:id="@+id/list_recycle"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="30dp"
            android:background="@color/white"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"

            />

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

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar_home"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="?attr/colorPrimary"
                android:minHeight="?attr/actionBarSize"
                app:layout_scrollFlags="scroll|enterAlways"

                >


            </android.support.v7.widget.Toolbar>

            <android.support.design.widget.TabLayout
                android:id="@+id/tab_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:tabBackground="@color/tab_bg"
                app:tabIndicatorColor="@color/tab_indicator"
                app:tabIndicatorHeight="5dp"
                app:tabMode="fixed"

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


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


        <android.support.design.widget.FloatingActionButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="15dp"
            app:layout_anchor="@+id/list_recycle"
            app:layout_anchorGravity="bottom|right"
            android:id="@+id/floatin_ab_home"
            app:fabSize="mini"
            android:src="@drawable/ic_content_add"

            />


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

Below is screen which don't showing Tab indicator so can any one known what i am missing .

Answer 1

I think it's bug on Design Support library. that When You apply both property at the same time

app:tabBackground="@color/tab_bg"
app:tabIndicatorColor="@color/tab_indicator"

the background color overlap the tab indicator. that's why the tab indicator is not visible.

If you remove tabBackground color property then you can see the indicator.

[Update on 25-06-2015]

As I said it's bug on Design Support library. I reported it to android bug source. here is the refrence https://code.google.com/p/android/issues/detail?id=176540.

So status for this is issue is FutureRelease so bug is fixed. And it will come in future library.

[Update 20-07-2015]

The bug is fixed and Released in v 22.2.1. you can also check it on above link.

Answer 2

You can use below methods

1 Change in xml app:tabIndicatorColor="" set your indicator color

2 creating costume theme

<style name="AppTheme.TabStyle" parent="Widget.Design.TabLayout">
        <item name="tabTextAppearance">@style/AppTheme.TextStyle</item>
        <item name="tabTextColor">@color/primaryDark</item>
        <item name="tabSelectedTextColor">@color/white</item>
        <item name="tabIndicatorColor">@color/primaryDark</item>
        <item name="tabIndicatorHeight">3dp</item>
        <item name="android:background">?attr/colorPrimary</item>
    </style>

    <style name="AppTheme.TextStyle" parent="TextAppearance.Design.Tab">
        <item name="android:textSize">14sp</item>
        <item name="textAllCaps">true</item>
    </style>

set theme in your Tablayout

Answer 3

You are using RecyclerView as the main content, use ViewPager containing RecyclerView and make sure you give viewpage attribute app:layout_behavior="@string/appbar_scrolling_view_behavior"

Answer 4

I've just fixed this bug set background color programmatically

tabLayout.setBackgroundColor(getResources().getColor(R.color.primary));

or in xml

android:background="@color/primary"

But I don't know if there is any problem when you set background color this way

Answer 5

Here you go.. :)

Change your attribute

app:tabBackground="@color/tab_bg"

to

android:background="@color/tab_bg"

your final code..

 <android.support.design.widget.TabLayout
            android:id="@+id/tab_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/tab_bg"
            app:tabIndicatorColor="@color/tab_indicator"
            app:tabIndicatorHeight="5dp"
            app:tabMode="fixed">
 </android.support.design.widget.TabLayout>

Answer 6

Use app1:tabIndicatorColor instead of app:tabIndicatorColor. It will automatically create the namespace app1 when you use the attribute.