Add method to change Text Gravity to RTL or LTR

add method to change text Gravity for tvContent to RTL or LTR (left or right)

<TextView
android:id="@+id/tvContent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right" -----------------> left or right
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:textColor="@android:color/white"
android:visibility="visible" />