Examples to center TextView

Examples to center TextView with XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello"
        android:textStyle="bold|italic"
        android:layout_gravity="center_horizontal"
        android:background="#B0B0B0" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Android-er"
        android:textStyle="bold"
        android:gravity="center_horizontal"
        android:background="#808080" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold"
        android:textColor="@android:color/white"
        android:gravity="center"
        android:background="#505050" />

</LinearLayout>