How can we reduce the gap between tab layout text and its indicator
Try this
<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/htab_maincontent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/htab_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2fff00"
android:fitsSystemWindows="true"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/htab_collapse_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false">
<android.support.v7.widget.Toolbar
android:id="@+id/htab_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@android:color/transparent"
app:contentInsetStart="0dp"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<ImageView
android:id="@+id/htab_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher_background"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="@+id/htab_tabs"
android:layout_width="match_parent"
android:layout_height="35dp"
android:layout_gravity="bottom"
android:background="@drawable/tab_selector"
app:layout_anchor="@+id/MyAppbar"
app:layout_anchorGravity="bottom"
app:tabGravity="fill"
app:tabIndicatorColor="#F21757"
app:tabMode="scrollable"
app:tabSelectedTextColor="#F21757"
app:tabTextColor="@android:color/white" />
</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>
drawable/tab_selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true" android:state_pressed="false">
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:top="-2dp" android:left="-5dp" android:right="-5dp" android:bottom="2dp">
<shape android:shape="rectangle">
<solid android:color="@android:color/white"/>
<stroke android:color="@color/colorPrimary" android:width="2dp"/>
</shape>
</item>
</layer-list>
</item>
<item android:state_selected="true" android:state_pressed="true">
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:top="-2dp" android:left="-5dp" android:right="-5dp" android:bottom="2dp">
<shape android:shape="rectangle">
<solid android:color="@android:color/white"/>
<stroke android:color="@color/colorPrimary" android:width="2dp"/>
</shape>
</item>
</layer-list>
</item>
</selector>
You should set the following property
app:tabPaddingBottom="-10dp"