in_app_java

In-App Java Example

This example shows how to write custom java code in android/app/src and call it using bindings generated by JNIgen.

How to run this example:

• Run flutter run to run the app.

General steps

These are general steps to integrate Java code into a Flutter project using JNIgen.

• Place Java code in a suitable package folder under the android/ subproject of the flutter app.
• Create a JNIgen configuration script like tool/jnigen.dart in this example.
• Run flutter pub get.
• Generate bindings by running that script with dart run.
• To prevent tree shaking of your custom classes (which are always accessed reflectively in JNI) use either the @Keep annotation (androidx.annotation.Keep) for code written in the application itself, or a proguard-rules file for external libraries.
• Build and run the app.