Android Application Development Cookbook - Second Edition

Using RelativeLayout

As mentioned in the Introduction, the RelativeLayout allows Views to be position-relative to each other and the parent. RelativeLayout is particularly useful for reducing the number of nested layouts, which is very important for reducing memory and processing requirements.

Getting ready

Create a new project and call it RelativeLayout. The default layout uses a RelativeLayout, which we will use to align Views both horizontally and vertically.

How to do it...

1. Open the res/layout/activity_main.xml file and change it as follows:

   <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Centered" android:layout_centerVertical="true" android:layout_centerHorizontal="true" ...