How do I stop the code from running after showing a dialoge? (Android Studio)

Issue

At the very start of my application I have a dialoge appear where the user can select between two options:

The code from where I run the dialoge looks like this:

override fun onStart() {
    super.onStart()

    popup.show(supportFragmentManager, "example d")
    Log.d("TAG", "THIS SHOULD BE RUN AFTER I HAVE CLICKED ONE OF THE DIALOGUE BUTTONS")

    checkSharedPreference()
    switcher()
}

The problem is that the code doesn't stop by popup.show(supportFragmentManager, "example d"). It keeps running. I assume that this has to do with dialoge being async, no? How do I solve this? Completionhandler? Asynctask? Something else?

UPDATE I tried building the clock in accordance with what @Akshay Paliwal said:

class MainActivity : AppCompatActivity() {

    public fun onCreateDialog(savedInstanceState: Bundle?): Dialog {

    val context = applicationContext
    val sharedPreference = context.getSharedPreferences(
            "key", Context.MODE_PRIVATE)

    val builder = AlertDialog.Builder(applicationContext)

    builder.setTitle("Välkommen till Demensvård utan tvång.")
            .setMessage("Berätta vem du är.")
            .setPositiveButton("Anhörig") { dialog, which ->
                val version = "anhorig"
                sharedPreference.edit().putString("version", version).apply()
                checkSharedPreference()
                switcher()
            }
            .setNegativeButton("Personal") { dialog, which ->
                val version = "personal"
                sharedPreference.edit().putString("version", version).apply()
                checkSharedPreference()
                switcher()
            }

    return builder.create()
}

override fun onStart() {
    super.onStart()

    //THIS? doesn't work...
    onCreateDialog(WHAT BUNDLE???)

    //OR THIS?
    onCreateDialog(what bundle?).show(supportFragmentManager, "example d")
}

How do I call the `onCreateDialog` function? `onCreateDialog(WHAT BUNDLE???)` what bundle should be passed? `onCreateDialog(what bundle?).show(supportFragmentManager, "example d")` Again what bundle? 

Or do I need to have onCreateDialog in a separate class that extends AppCompatDialogFragment? In that case do I call main.switcher from the callback in that class?

Solution

You should use dialog callback for this purpose as below:

1. Create a dialog or alert dialog

2. receive callback on action on buttons

       AlertDialog.Builder builder = new AlertDialog.Builder(activity);
       builder.setMessage("message")
               .setTitle("Warning");
       builder.setPositiveButton("Done", new DialogInterface.OnClickListener() {
           @Override
           public void onClick(DialogInterface dialogInterface, int i) {
   
               dialogInterface.dismiss();
               // do your go ahead task here like
               //checkSharedPreference()
               //switcher()
   
           }
       });
       builder.setNegativeButton(R.string.update_linkedin_app_cancel, new DialogInterface.OnClickListener() {
           @Override
           public void onClick(DialogInterface dialogInterface, int i) {
               dialogInterface.dismiss();
               finish(); // to finish current activity
           }
       });
       builder.create().show();
   

Answered By - Akshay Paliwal