Adding a line below TabLayout

Question

I'm having a trouble trying to add a line below the TabLayout, but it has to be behind the selector line. Should be something like this:

I already tried to add a custom view, but each tab have some margin inside, so didn't worked out.

any ideas?

This is what I got right now:

Here its how i'm adding it on XML:

<android.support.design.widget.TabLayout
    android:id="@+id/tabs"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    app:tabBackground="@color/white"
    app:tabIndicatorColor="@color/colorAccent"
    app:tabTextColor="@color/white"/>

and this is what i'm doing via code:

private void configureTabLayout() {
    TabLayout.Tab tabHome = mTabLayout.newTab().setIcon(R.drawable.ic_home_cinza);
    TabLayout.Tab tabEmprestimos = mTabLayout.newTab().setIcon(R.drawable.ic_emprestimos_cinza);
    TabLayout.Tab tabPersonal = mTabLayout.newTab().setIcon(R.drawable.ic_usuario_cinza);

    View root = mTabLayout.getChildAt(0);
    if (root instanceof LinearLayout) {
        ((LinearLayout) root).setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
        GradientDrawable drawable = new GradientDrawable();
        drawable.setColor(getResources().getColor(R.color.silver));
        drawable.setSize(2, 1);
        ((LinearLayout) root).setDividerPadding(10);
        ((LinearLayout) root).setDividerDrawable(drawable);
    }

    mTabLayout.addTab(tabHome);
    mTabLayout.addTab(tabEmprestimos);
    mTabLayout.addTab(tabPersonal);
    mTabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
}

Answer 1

In your Drawable folder create an xml

background.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:top="-10dp" android:right="-10dp" android:left="-10dp">
        <shape 
            android:shape="rectangle">
            <solid android:color="#1bd4f6" />
            <stroke
                android:width="2dp"
                android:color="#0288D1" />
        </shape>
    </item>

</layer-list>

Set this to your TabLayout

  <android.support.design.widget.TabLayout
        android:background="@drawable/background"
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        app:tabIndicatorColor="@color/colorAccent"
        app:tabTextColor="@color/white"/>

Change values and colors as you need!

Output: