one. text edit control
TextView
EditText
AutoCompleteTextView
TextSwitcher
two. button control
Button的子类：button,checkbox,rediobutton,togglebutton,
three. Picture control
ImageView
ImageButton
ImageSwitcher和gallery
Four. time control
Digitalclock
AnalogClock
TimePicker
DatePicker
Fives. progress bar
ProgressBar
SeekBar
RatingBar
http://limingnihao.iteye.com/blog/852498