How to access ReactContextBaseJavaModule from both, a react native file (*.js) and a Kotlin class (*.kt)?

Question

I am new to React Native and working on an application which stores local data using Android SharedPreferences. I currently have SharedPreferences setup as ReactContextBaseJavaModule and am able to access all methods through @ReactMethod annotation from a React Native file.

I need to access the value from SharedPreference, defined as ReactContextBaseJavaModule, inside native Android module. Currently I am able to achieve that by updating a constant defined in native Android class(*.kt). Is there a better way to do this, i.e. ability to access methods defined inside ReactContextBaseJavaModule from Android classes or creating a wrapper for SharedPreference access?

I have tried to search for the solution in multiple platforms, and found solutions on how we can access native module from React Native files. I am unable to find the solution on two-way access to a ReactContextBaseJavaModule class.

The challenges I am facing:

1. Unable to pass ReactApplicationContext from native Android class for the class instance.
2. Unable to access methods annotated with @ReactMethod from native Android class.
3. Injecting native Android class instance inside ReactContextBaseJavaModule.

Answer 1

1. Created a native android SharedPreferences class that exposes all the shared preferences related methods.

   class MySharedPreferences constructor(context: Context) {/getters and setters/}

2. Created a ReactContextBaseJavaModule as a bridge to React Native with exposed methods annotated with @ReactModule. Created an instance of Android native SharedPreferences inside init{} method.

    class MySharedPreferencesModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {
     private var mySharedPreferences: BeaconSharedPreferences
   
    init {
        mySharedPreferences = MySharedPreferences(context = reactContext)
    }}
   

3. Now I am able to access Android native SharedPreferences with an instance inside the Android class where I need to access the prefs values, and access/update values through the bridge to/from React Native.