An app for calculating the tip amount for food services

Project: Hora da Gorjeta App (Tip Time App)
Introduction
This is a project to demonstrate the concepts I learned on Android development. It’s an app to calculate the tip value (15, 18 or 20%) on top of a service with the possibility to round up the amount.
Concepts such as user inputs, themes, styles, icons, instrumented tests and a splash screen were practiced and implemented in this app.