Kotlin is not only a lot of fun to work with, but also increasingly relevant language. In May 2019 Google proclaimed Kotlin to be the preferred language for Android app developers. Spring now offers out of the box web service setup for Kotlin. This project is a playful demonstration of an Android front end with a Spring-Boot back end implemented a RESTful web service.
Both front end and back end are Gradle-based projects. Any dependancies needed are imported automatically.
Android Studio for front end and IntelliJ for back end are great alternatives to get this demo running.
Note that you will have to either enter the IP address of your back end service if using an external device (smartphone) or change the address to localhost if using an emulator. This has to be done in two files (marked as TODO in both):
- \01_BackEnd(SpringWebService)\app\src\main\java\com\example\myapplication\MainActivity.kt
- \02_FrontEnd(AndroidApp)\app\src\main\res\xmlnetwork_security_config.xml
The front end looks as follows:
| On start | GET request | POST request |
|---|---|---|
 |
 |
 |
This is a demo project which cannot be claimed to be secure as is. Additional information about securing an Android application can be found for example in my Medium article Android's Security Concept.
This project is released under the MIT license.