Currency Converter App Android Source Code Java for Beginners

If you're a beginner in Android app development, you're in the right place. The Java programming language is a great starting point for building a currency converter app.

To get started, you'll need to understand the basics of Java, such as variables, data types, and control structures.

You can use the Android Studio IDE to write and debug your Java code.

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To create a Currency Converter App, you'll need to launch Android Studio, which can take a few minutes depending on your computer's speed and RAM. You may need to wait until Gradle Sync is finished.

You'll then go to File > New and create a new project, naming it Currency Converter App or something you like. Select Phone and Tablet as the Form Factors and API 15: Android 4.0.3 (IceCreamSandwich) as the minimum SDK.

This API is chosen because it powers at least 90% of all Android devices in the world. You should always try to make Android applications compatible with the majority of the Android devices in the market.

In Create a new empty Activity, you'll continue with defaults and click Finish. You'll then have to wait until Gradle Sync is finished to continue with the tutorial.

The source code for the Simple Currency Converter will be put in activity_main.xml and the Java implementations in MainActivity.java.

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To implement the currency converter functionality, you'll need to add code to the MainActivity.java file. Go back to Java > com.example.currencyconverterApp and select MainActivity. The onCreatemethod is already created for you, but you'll need to implement the convertToEuro method.

First, you'll find the int euro = 2000; line of code, where 2000 is just a placeholder variable that you can change to any currency rate you want. This variable will determine the conversion rate for your currency converter app.

To display the result/output, you can use a toast, which will pop up a message on the screen. Alternatively, you can show the result in the Activity_main.xml interface as a TextView by adding the code snippet below.

Here are the steps to implement the convertToEuro method:

The Currency Converter app is built using Java and Android Studio, allowing users to convert between different currencies in real-time.

It utilizes two currency conversion APIs, specifically https://api.frankfurter.app/latest.

The app is designed with a modern UI concept, using material design to provide a wonderful and new design idea.

It supports most Android devices and has Google Ad-mob ads integration to generate revenue.

Banner and interstitial ads are implemented, following Google Ad-mob policy guidelines.

To get started with the app, you'll need to have Java and Android Studio set up on your development environment.