sheishuoAPP/app/res/layout/settings_logout_footer.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:paddingLeft="@dimen/isetting_item_padding_left"
    android:paddingRight="@dimen/isetting_item_padding_right"
        >

    <Button
        android:id="@+id/settings_button_logout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dip"
        android:layout_marginTop="15dip"
        android:background="@drawable/nim_red_round_button_selector"
        android:text="@string/logout"
        android:textColor="@color/white"
        android:textSize="17sp" />

</LinearLayout>