Say you want a login screen with two text boxes and two buttons. And you want the buttons at the bottom of the screen. Here is how:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dip" >

    <EditText
        android:id="@+id/userName"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"

ComboBox is a very useful widget that allows user to type the text in or select from predefined list of options.

I came across this inconsistency while developing my Secret Box application.