Inputs Controls (Button, textView...)

• Android Developers: Input Control
• www.tutorialspoint.com: Input Control Tutorial

Buttons

• Button
• ImageButton
• ImageView
• VideoView

Toggle Buttons

• ToggleButton
• Switch
• SwitchCompat
• CompoundButton

Checkboxes

• CheckBox

Text Fields

• TextView
• EditText
• AutoCompleteTextView
• CheckedTextView
• 
  

Radio Buttons

• RadioButton
• RadioGroup

Bars

• ProgressBar
• ProgressBar (Horizontal)
• SeekBar
• SeekBar (Discrete)
• QuckContactBadge
• RatingBar
• Space

Spinners

• Spinner
• SpinnerAdapter

Pickers

• DatePickerDialog
• TimePickerDialog
• CalendarView
• Chronometer
• TextClock