How I can build a .jar file first and then my andoid app?

In my project: https://github.com/pc-magas/sercommH300sVoipCredentialsRecovery source is seperated into 2 parts:

1. The core library where no android dependencies are placed.
2. The android app iself.

Core Logic is in app/src/main/java/pc_magas/vodafone_fu_h300s/logic/ and the tests for the core logic is in: app/src/test/java/pc_magas/vodafone_fu_h300s/logic/

Therefore, I want to split my build process into these phases:

1. Build a .jar out of the app/src/main/java/pc_magas/vodafone_fu_h300s/logic/
2. place it into ./app/libs
3. Build the app itself using the generated .jar

Therefore how I can configure the gradle.build to build my library first?

Answer

Well based upon this answer you’ll need you create a new Java/Kotlin library in order to do this you’ll need to follow these steps:

1. In android studio select File -> New -> New Module
2. Then select Java or Kotlin Library.
3. Use the default settings.

This step creates a new folder with its own build.gradle. I’ll assume that the folder’s name is settings_fetcher. The folder name is the one you choose in this window:

Also, this name mentioned above is the name you’ll need to place into the application’s dependency as well. So in the window shown above used settings_fetcher as Library Name then you’ll need to place the following dependency into your build.gradle located into

Once you created the module place into app/build.gradle the correct dependency as stated in this answer.

Then move the files located in app/src/main/java/pc_magas/vodafone_fu_h300s/logic/ into the settings_fetcher/src/main/java/pc_magas/vodafone_fu_h300s/logic/ also move any tests, related to the library, located in app/src/tests into settings_fetcher/src/tests (Assuming the new library is named settings_fetcher)

Then try to run the tests and build the application as well in order to ensure the correctness of the application’s functionality as well.