How to Set the Divider Between Tabs in Tablayout of Design Support Library

How to set the divider between Tabs in TabLayout of design support library?

There is a way to add divider by using Tab setCustomView method:

TabLayout tabLayout = (TabLayout) findViewById(R.id.tablayout);
tabLayout.setupWithViewPager(viewPager);

for (int i = 0; i < tabLayout.getTabCount(); i++) {
      TabLayout.Tab tab = tabLayout.getTabAt(i);
      RelativeLayout relativeLayout = (RelativeLayout) 
            LayoutInflater.from(this).inflate(R.layout.tab_layout, tabLayout, false);

      TextView tabTextView = (TextView) relativeLayout.findViewById(R.id.tab_title);
      tabTextView.setText(tab.getText());
      tab.setCustomView(relativeLayout);
      tab.select();
}

Tab custom layout with divider (tab_layout.xml):

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

<!-- Tab title -->
<TextView
    android:id="@+id/tab_title"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:textColor="@drawable/tab_item_selector"/>

<!-- Tab divider -->
<View
    android:layout_width="1dp"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:background="@android:color/black" />
</RelativeLayout>

Set TabLayout tab horizontal padding to 0dp:

<android.support.design.widget.TabLayout
        android:id="@+id/tablayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/shape_tabbar_background"
        app:tabIndicatorColor="@android:color/white"
        app:tabIndicatorHeight="4dp"

        app:tabPaddingStart="0dp"
        app:tabPaddingEnd="0dp" />

And a selector for tab title text color when it's selected (tab_item_selector.xml):

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:color="@color/abc_primary_text_material_dark" />
    <item android:state_focused="true" android:color="@color/abc_primary_text_material_dark" />
    <item android:state_pressed="true" android:color="@color/abc_primary_text_material_dark" />
    <item android:color="@color/abc_secondary_text_material_dark" />
</selector>

Add separator in tablayout in android

Firstly create custom XML file for separator:

tab_layout.xml :

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

    <!-- Assign Tab title in below text view-->

   <TextView
        android:id="@+id/tab_title"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:textColor="@drawable/tab_item_selector"/>

     <!-- Create separator -->

     <View
         android:layout_width="1dp"
         android:layout_height="match_parent"
         android:layout_alignParentLeft="true"
         android:background="@android:color/black" />

 </RelativeLayout>

Now in your java file code as below:

  for (int i = 0; i < bottomTab.getTabCount(); i++) {
       TabLayout.Tab tab = bottomTab.getTabAt(i);
       RelativeLayout relativeLayout = (RelativeLayout) 
       LayoutInflater.from(this).inflate(R.layout.tab_layout, bottomTab, false);

       TextView tabTextView = (TextView) relativeLayout.findViewById(R.id.tab_title);
       tabTextView.setText(tab.getText());
       tab.setCustomView(relativeLayout);
       tab.select();
  }

and add below lines in tablayout tag:

    app:tabPaddingStart="0dp"
    app:tabPaddingEnd="0dp"

tab_item_seletor.xml :

 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_selected="true" android:color="@color/abc_primary_text_material_dark" />
     <item android:state_focused="true" android:color="@color/abc_primary_text_material_dark" />
     <item android:state_pressed="true" android:color="@color/abc_primary_text_material_dark" />
    <item android:color="@color/abc_secondary_text_material_dark" />
 </selector>

Is there a way to add vertical line between each tab in TabLayout

TabLayout is actually a horizontal scrollable LinearLayout.

Just use following code to add dividers:

    LinearLayout linearLayout = (LinearLayout)tabLayout.getChildAt(0);
    linearLayout.setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
    GradientDrawable drawable = new GradientDrawable();
    drawable.setColor(Color.GRAY);
    drawable.setSize(1, 1);
    linearLayout.setDividerPadding(10);
    linearLayout.setDividerDrawable(drawable);

TabLayout set spacing or margin each tab

Been fighting this problem for a while too, found the solution on this thread : Android Design Support Library TabLayout using custom tabs layout but layout wrapping the tabs

<!-- Add the padding to tabPaddingStart and/or tabPaddingEnd -->
<android.support.design.widget.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="@dimen/tab_layout_height"
        app:tabPaddingStart="10dp"
        app:tabPaddingEnd="10dp">

Android Design Support Library: TabLayout tabs text in single line

Just add app:tabMode="scrollable" to TabLayout;

<android.support.design.widget.TabLayout 
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/sliding_tabs" 
android:layout_width="match_parent" 
app:tabMode="scrollable"
android:layout_height="wrap_content" /> 

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