CODEWITHSUNDEEP
javaandroidprogressdialogtoast
rudder
rudder

Reputation: 87

Toast nor ProgressDialog does not appear

What I want to do is to give the user information about the the progress during work and calculation performed in the background (like "Logging in", "Retrieving documents", "Analyzing documents", etc).

What happens is only the art one is displayed, and only after all the work is completed. What am I doing wrong, and what is the normal way to implement this?

Below is a sample code that illustrates the problem. Neither the Toast nor the ProgressDialog is displayed before the loop is completed:

ProgressDialog.show(this, "Working", "Performing calculation");

CharSequence text = "Performing calculation"; 
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(this, text, duration); 
toast.show();

for(int i = 0; i < 5000; i++) {
     Log.d("Debug", Integer.toString(i)); 
}

Any points in the right direction are appreciated.

Upvotes: 2

Views: 123

Answers (2)

Arun George
Arun George

Reputation: 18592

The scenario you described where in you have a background process and you want to update the user about the progress should be dealt with using AsyncTask where you have the methods like doInBackground() and onProgressUpdate().

Upvotes: 2

Nuno Gon&#231;alves
Nuno Gon&#231;alves

Reputation: 6805

If you want to perform background operations, you should consider using AsyncTask, or a different Thread to do the job. Otherwise, you'll block the UI doing those tasks which is ugly for the end user. Take a look at this tutorial:

http://www.vogella.com/articles/AndroidPerformance/article.html

Upvotes: 1

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