Mobile button

1. What is button in mobile app?
2. What size should mobile buttons be?
3. Should mobile buttons be full width?

What is button in mobile app?

In Android, Button represents a push button. A Push buttons can be clicked, or pressed by the user to perform an action. There are different types of buttons used in android such as CompoundButton, ToggleButton, RadioButton. Button is a subclass of TextView class and compound button is the subclass of Button class.

What size should mobile buttons be?

Studies by the MIT Touch Lab suggest that 10mm × 10mm is the best minimum size for buttons on mobile due to the average size of fingertips.

Should mobile buttons be full width?

Depending on layout, orientation and purpose but it's a good rule of thumb to add at least an 8dp margin. Keep in mind touch space limitations, for example on Android, Material Design deems as good practice to have buttons that are at least 48x48 dp wide so the area of the buttons is comfortable to use for the users.