Building a Tip Calculator Android App: A Step-by-Step Guide with Code Example
Introduction
Mobile app development offers an exciting opportunity to create practical and user-friendly tools that can be used in everyday life. In this tutorial, we’ll guide you through the process of building a Tip Calculator app for Android. This example will not only introduce you to the basics of Android app development but also provide a practical use case for your skills.
Prerequisites
Before you begin, make sure you have Android Studio installed on your computer and a basic understanding of Java programming.
Step 1: Create a New Android Project
- Open Android Studio and select “Start a new Android Studio project.”
- Choose an “Empty Activity” template.
- Configure your project details and select “Finish.”
Step 2: Design the User Interface
- Open the
activity_main.xml
layout file. - Replace the existing code with the following:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"…