Basics #2: Field injecting a class with no dependencies. You own that class.

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import dagger.hilt.android.AndroidEntryPoint
import javax.inject.Inject

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {

    @Inject
    lateinit var someClass: SomeClass

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        println(someClass.doAThing())
        println(someClass.doSomeOtherThing())
    }
}

class SomeClass
@Inject
constructor(
    private val someOtherClass: SomeOtherClass
){
    fun doAThing(): String{
        return "Look I did a thing!"
    }
    
   fun doSomeOtherThing(): String{
        return someOtherClass.doSomeOtherThing()
    } 
}

class SomeOtherClass
@Inject
constructor(

){
    fun doSomeOtherThing(): String{
        return "Look I did some other thing!"
    }
}