app crashes as the late init property has not been initialized in android studio

Question

I have a button, when i click on that, it should show the Alert dialog box, But app crashes when i click on that button I know the code flow is this but I dont know Where i had done my mistake

      private lateinit var btn: Button
      
 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_dynam)
        btn = findViewById(R.id.add1)
        buildDialog()

        btn.setOnClickListener(object : View.OnClickListener {
            override fun onClick(v: View?) {
              dialog.show()
            }
        })
    }

    private fun buildDialog() {
        val builder=android.app.AlertDialog.Builder(this)
        val view=layoutInflater.inflate(R.layout.dialog_dynam,null)
      val name=  view.findViewById<EditText>(R.id.nameEdit)
        builder.setView(view)
        builder.setTitle("Enter name")
            .setPositiveButton("Ok",object :DialogInterface.OnClickListener{
                override fun onClick(dialog: DialogInterface?, p1: Int) {
addname(name.text.toString())

                }`

I'm guessing `dialog` is a `lateinit` property that you forgot to assign in `buildDialog()`. — Tenfour04, Jul 26 '21 at 15:29
yeah @Tenfour04 I think I had added though, since my line is lateinit var dialog: AlertDialog — Aasima Jamal, Jul 26 '21 at 15:31
And where did you put `dialog =`? It should be at the end of your `buildDialog()` function. — Tenfour04, Jul 26 '21 at 15:37

Pranav Choudhary · Accepted Answer · 2021-07-26T16:22:45.000

2

I think you have dialog as a lateinit variable and you forgot to assign it in buildDialog function.

      private lateinit var btn: Button
      private lateinit var dialog:AlertDialog

      
      override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_dynam)
        btn = findViewById(R.id.add1)
        buildDialog()

        btn.setOnClickListener(object : View.OnClickListener {
            override fun onClick(v: View?) {
         if (this@YourActivity::dialog.isInitialized) { // to check if dialog is initialize or not
          dialog.show()
         }
            
            }
        })
    }

    private fun buildDialog() {
        val builder=android.app.AlertDialog.Builder(this)
        val view=layoutInflater.inflate(R.layout.dialog_dynam,null)
        val name=  view.findViewById<EditText>(R.id.nameEdit)
        builder.setView(view)
        builder.setTitle("Enter name")
            .setPositiveButton("Ok",object :DialogInterface.OnClickListener{
                override fun onClick(dialog: DialogInterface?, p1: Int) {
                addname(name.text.toString())

        // initialize dialog
        dialog = builder.create()
                }

edited Jul 26 '21 at 16:22

answered Jul 26 '21 at 15:37

Pranav Choudhary

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Thank you for your effort But i couldn't get my word "dialog" inside the if statement combined with "this::" – Aasima Jamal Jul 26 '21 at 15:44
that is used as a safety factor to check if lateinit variable dialog is initialized or not. – Pranav Choudhary Jul 26 '21 at 15:55
yeah i saw in some suggestions , but i couldn't access my variable "dialog" inside that "if statement" – Aasima Jamal Jul 26 '21 at 16:02
Suppose you are doing this in MainActivity, the try using "this@MainActivity::dialog.isInitialized" in if statement. – Pranav Choudhary Jul 26 '21 at 16:09
Yeah done .. it doesn't crashes but i din't get my dialog box after clicking the button ..LOL – Aasima Jamal Jul 26 '21 at 16:13
check if you have initialize dialog in buildDialog() method. – Pranav Choudhary Jul 26 '21 at 16:21
1

I will solve then for my dialog. Thanks for your Time. – Aasima Jamal Jul 26 '21 at 16:39

app crashes as the late init property has not been initialized in android studio

1 Answers1