Cannot remove Padding from Tabs when using Custom views with Tab Layout

Question

I have added a Relative Layout in Custom View and have added this in Tab Layout. I am using a white background for tabs and have not applied any padding in tabs custom layou

Answer 1

Through XML you can remove only the left and right paddings like that:

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

Notice, that this way doesn`t work for TOP and BOTTOM paddings, but I find next solution:

When you use custom views as tab item, you need to set LayoutParams to the view and set paddings 0.

for (int i = 0; i < tabLayout.getTabCount(); i++) {           
    View tabView = LayoutInflater.from(context)
            .inflate(LayoutInflater.from(this), R.layout.item_main_tabview, null, false);

    tabView.setLayoutParams(new TableLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    tabView.setPadding(0, 0, 0, 0);
    tabLayout.getTabAt(i).setCustomView(tabViewBinding.getRoot());
}

Answer 2

 <android.support.design.widget.TabLayout
     android:id="@+id/tab_layout"
     android:layout_width="210dp"
     android:layout_height="28dp"
     android:layout_centerInParent="true"
     android:background="@drawable/bg_forum_tab"
     app:tabIndicatorColor="@color/colorBtnBg"
     app:tabIndicatorHeight="0dp"
     app:tabPaddingBottom="-1dp"
     app:tabPaddingEnd="-1dp"
     app:tabPaddingStart="-1dp"
     app:tabPaddingTop="-1dp"
     app:tabSelectedTextColor="@color/colorBtnBg"
     app:tabTextColor="@color/colorWhite" />

Set tabPaddingStart/tabPaddingEnd/tabPaddingTop/tabPaddingBottom like this.