Overview

Basic Communication: The app focuses on establishing fundamental communication protocols.

What I learned

• Socket Server/Client
• Synchronous/Asynchronous Http communication using OkHttp
• Thread
  • runOnUiThread
• JSON parse using GSON

Key Functions

• Server runs on PC, Client runs on Android app
• Client makes a request asynchronously
• Client parses the response (JSON to Data class)

Troubleshooting

Socket Communication in a Main Thread

Error: android.os.NetworkOnMaininTreadException
Action: Ensured that socket communication functions within a separate thread, preventing potential issues in the main thread.
Explanation: Network communication might need long time to finish, this can be block the UI(main) Thread.

UI handing in Main Thread

Error: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
Action: Avoided UI-related methods running in the main thread by utilizing the runOnUiThread scope.

HTTP Communication with OkHttp

Error: java.net.UnknownServiceException: CLEARTEXT communication to 10.0.2.2 not permitted by network security policy
Action: When communicating using HTTP, OkHttp requires the clear text option to be set to true, but this is not necessary for socket communication.

GitHub link