This lecture looks at how the View
and
ViewGroup
classes form the basis of Android widgets and
layouts. It then considers the different layout options available
in Android. After that, it explores how layouts and other kinds of
app resources are organised in subfolders of res
.
It considers how Android locates resources in this folder hierarchy.
The lecture explains why dp or sp are preferable to px as units for
specifying the dimensions of text or drawables. It also discusses how
and why an app's text strings are stored in separate resource files.