Android Studio & Kotlin: unresolved reference:context

Question

I've tried hundreds of ways to resolve this reference problem:

class MainActivity : AppCompatActivity() {

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

        val dm = DataManager()
        val adapterCourses = ArrayAdapter<CourseInfo>(context:  this,
                    android.R.layout)

but in ArrayAdapter<CourseInfo>(context: this, android.R.layout) I get unresolved reference: context and I have no idea why.

Android Studio version: 3.3.2 Kotlin version: 1.3.21

Could anyone help me?

Answer 1

I had a similar error message because I didn't import the Context. If you haven't explicitly imported Context, try adding this to your import list near the start of your Activity file:

 import android.content.Context