<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:gravity="bottom" android:layout_gravity="bottom" android:layout_width="fill_parent" android:layout_height="fill_parent"
  xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout android:gravity="bottom|center" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">
        <ImageView android:id="@id/main_tab_iv" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    </LinearLayout>
</RelativeLayout>