I’m developing an SDK, and I need to detect when a dialog is shown within the host app, but I don’t want to rely on explicit triggers from the host app.
The host app creates a dialog like this:

private fun createAlertDialog() {
    val dialog: AlertDialog

    val input = EditText(this).apply {
        layoutParams = LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.MATCH_PARENT
        )
        inputType = InputType.TYPE_TEXT_VARIATION_PASSWORD or InputType.TYPE_CLASS_TEXT
        filters = arrayOf(InputFilter.LengthFilter(15))
        id = R.id.edit_text_dialog
    }

    val ll = LinearLayout(this).apply {
        orientation = LinearLayout.VERTICAL
        addView(input)
    }

    val builder: AlertDialog.Builder = AlertDialog.Builder(this)
        .setCancelable(false)
        .setTitle("Dialog Title")
        .setMessage("Dialog Message")
        .setView(ll)
        .setOnKeyListener { dialog, keyCode, event ->
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                dialog.dismiss()
                true
            } else {
                false
            }
        }
        .setPositiveButton("Ok") { _, _ -> }

    dialog = builder.create()
    dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
    dialog.show()
    dialog.getButton(DialogInterface.BUTTON_POSITIVE).id = R.id.button_dialog
}

I want to detect the dialog being shown from my SDK without the host app explicitly calling any SDK methods. I thought about using View.addOnLayoutChangeListener on the activity’s root view. Here is what I have tried so far and it’s doesn’t work:

// Inside my SDK code
fun observeDialogShowing(activity: Activity) {
    val rootView = activity.window.decorView.rootView

    rootView.addOnLayoutChangeListener(object : View.OnLayoutChangeListener {
        override fun onLayoutChange(
            v: View?,
            left: Int,
            top: Int,
            right: Int,
            bottom: Int,
            oldLeft: Int,
            oldTop: Int,
            oldRight: Int,
            oldBottom: Int
        ) {
            // Check if the dialog view is now visible
            Log.d("MainActivity2", "onLayoutChange")
        }
    })
}

I tried to using the ActivityLifecycleCallbacks interface and check if a dialog is shown in the onActivityResumed method and also using the ViewTreeObserver.OnGlobalLayoutListener interface.
Both options don’t work.

My question is: How can I detect when a dialog is shown in an Android app from my SDK without requiring explicit triggers from the host app?