FATAL EXCEPTION: main KotlinNullPointerException

Question

This is my first time building an android application. However when i run the app on my Virtual Device, it stopped working and keeps crashing. The error says something about

Answer 1

Your EditText is null. You can initialize your EditText. Example Kotlin code,

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

    val date = findViewById(R.id.editTextDate)
    date.apply {
        setText("15-11-2017")
        isEnabled = false
    }
  }