让我们使用css的形式来控制Android的控件的样式，支持的控件有View (generic attributes support for all views)
ImageView
TextView
CheckedTextView
Button
CompoundButton
ImageButton
ToggleButton
RadioButton
CheckBox
Spinner
ListView
GridView
EditText (support a non-editing mode)
ActionBar (not in the View's hierarchy, but almost completely supported)
