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I am downloading a file from the Azure storage and showing an alert dialog to a user with a progress bar. I am downloading the file from the background thread and showing the alert on the UI thread. When I start downloading the file it is showing the alert dialog to the progress bar and when the user presses the home button and came to the app and the alert dialog is not visible to the user. I am getting instance of alert dialog but it is not showing.

How my theard look like:

private fun startTheard() {
        val thread = Thread {

            // downloading and calling this method to show alert dialog
            showDialogBox(10)

        }
        thread.start()
    }

When the user came back to the application and I put debugger and theard and it is calling the showDialogBox function with the updated progress but it is not visible to the user.

How I am generating alert dialog:

private fun showDialogBox(progress: Int) {
        runOnUiThread {
            // hear i am getting alertDialog instance i.e it is not null and calling else part
            // but not visible to user
            if (alertDialog == null) {

                val mDialogView = LayoutInflater.from(this).inflate(
                    R.layout.cdfw_download_status_layout,
                    null
                )

                val mBuilder = AlertDialog.Builder(this)
                    .setView(mDialogView)
                    .setCancelable(false)

                headingTv = mDialogView.findViewById(R.id.heading)
                headingSubTv = mDialogView.findViewById(R.id.heading_sub)
                closeButtonCdfw = mDialogView.findViewById(R.id.close_button)
                cdfwProgressBarForCdfwDilog = mDialogView.findViewById(R.id.progress_bar)
                cdfwProgressBarForCdfwDilog.progress = progress

                alertDialog = mBuilder.show()
            } else {
                cdfwProgressBarForCdfwDilog.progress = progress
            }
        }
    }

Alert dialog is global instace of activity :

class MainActivity : AppCompatActivity() {

    private var alertDialog: AlertDialog? = null

one observation is when a user came back to the app and I checked in the onResume alert dialog instance is null and when the showDialogBox function gets called from the background thread at that time alert dialog instance is not null.

NOTE: I have also tried to dismiss the dialog in the onPause method but still facing the same issue.

How do I solve this? Am I missing anything?

Harsh Shah
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  • Have you tried to show Dialog onResume()? – Udhaya Aug 23 '21 at 13:06
  • yes, I have tried this and it is showing the dialog but it is not getting updated when the download thread make any progress – Harsh Shah Aug 23 '21 at 13:10
  • Does your else block really executes? Is your `cdfwProgressBarForCdfwDilog` is `null`? Have you checked those 2 things – Udhaya Aug 23 '21 at 13:15
  • Yes, else block executes and onResume `cdfwProgressBarForCdfwDilog` is showing null and inside method it is not null. – Harsh Shah Aug 23 '21 at 14:01

0 Answers0