Basics #4: Dependencies that require dependencies (Concrete classes that you own)

explanation.md

This is no issue. Just add @Inject to the constructor and hilt can figure it out.

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.fragment.app.Fragment
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())
    }
}

class SomeClass
@Inject
constructor(
    private val someDependency: SomeDependency
){
    fun doAThing(): String{
        return "Look I got: ${someDependency.getAThing()}"
    }
}

class SomeDependency
@Inject
constructor(){
    fun getAThing() : String{
        return "A Thing"
    }
}