I'm working on an existing project and would like to call refresh function in main app module from the library module. So when the library module verifyCode is complete it will call the main app's refresh function to refresh the view again.

build.gradle(:app)
    
dependencies {
    .
    .
    .
    implementation project(path: ':dependency')
}
    

main app module

open class BaseActivity : AppCompatActivity() {
    lateinit var pref: PreferenceManager
    lateinit var repository: BasicRepository

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        pref = PreferenceManager(this)
        setupContentWindow()
    }

    override fun onResume() {
        super.onResume()

    if (pref.checkCredential()) {
        val intent = PinCodeActivity.intent(this, true, pref.token())
        startActivity(intent)
    }
    refresh()
}

private fun refresh() {
    //refresh user data
}

library module

private void checkCode(String pin, String token) {
    APIManager.getInstance().verifyCode(token, pin, new Callback<String>() {
        @Override
        public void onResponse(Call<String> call, Response<String> response) {
            String responseUser = response.body();
            if (response.code() == 200) {
                if (responseUser == "true") {
                    setResult(RESULT_OK);
                    finish();
                    //call main app refresh function after the endpoint return 200
                } else {
                    //do something
                }
            } else {
                  //do something
            }
        }

        @Override
        public void onFailure(Call<String> call, Throwable t) {
            //do something
        }
    });
}