UI controls are also called input controls that allow you to interact with the user interface. There is a wide range of controls that allows you to implement text fields, input fields, buttons, checkboxes, toggle buttons, and other UI components in your Android application. 
There are a variety of UI controls provided by Android that include the following:

• TextView: This UI control is used to show text content to the user. 
• Button: Buttons are a very important part of any UI. Buttons are used to act after they are clicked or pressed. 
• CheckBox: Checkboxes are used for selectable items such that they work just like an on/off switch. 
• ImageButton: It comes under AbsoluteLayout which displays an image with a clickable button. 
• RadioButton: Radio buttons are used where are multiple options and the input can be taken only once. 
• ToggleButton: This type of UI control is an on/off button with a light indicator that turns on after clicking that button and turns off after re-clicking that button. 
• DatePicker: It is used to select a date from the calendar. 
• TimePicker: TimePicker allows users to pick a time. It also provides two different modes for a time such as 12-hour or AM/PM mode and 24-hour mode.