android Tablayout 页签较少不填充屏幕宽度

 <android.support.design.widget.TabLayout
        app:tabGravity="fill"
        app:tabMaxWidth="0dp"
        app:tabMode="fixed"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </android.support.design.widget.TabLayout>