please see this go to link

class MainApplication : Application() {

    init {
        instance = this
    }

    companion object {
        private var instance: MainApplication? = null

        fun applicationContext() : Context {
            return instance!!.applicationContext
        }
    }

    override fun onCreate() {
        super.onCreate()
        // initialize for any

        // Use ApplicationContext.
        // example: SharedPreferences etc...
        val context: Context = MainApplication.applicationContext()
    }
}

Extends Application class like this

import android.app.Application
import android.content.Context

class MyApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        MyApplication.appContext = applicationContext
    }

    companion object {

        lateinit  var appContext: Context
  
    }
}

then get context like this

     val context = MyApplication.appContext

Actually I'm working inside an Android library and the class is abstract, so can't go with the already suggested solutions. However, I found way to do that.

1. Creat a lateinit Context field inside companion object.

abstract class MyClass {

    companion object {

        private lateinit var context: Context

        fun setContext(con: Context) {
            context=con
        }
    }
}

2. And then set it after the app has started

public class WelcomeActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);

        MyClass.Companion.setContext(this);
    }
}