Question

The progress dialog in AsyncTask does not dismiss, even though progressDialog.dismiss is run in onPostExecute().

I have tried implementing many answers to related questions on SO, with no success so far.

I am sure that I must be overlooking something very basic, but I am stuck.

Any pointers to an explanation and code snippet would be great, Thanks.

Main

public class Main extends Activity {
    String result;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        asyncTask task = new asyncTask("Loading ...", this);
        try {
            result = task.execute("Question").get();
        }
        catch (Exception e) {
            Log.e("Error: ", e.toString());
        }
    }
}

asyncTask

public class asyncTask extends AsyncTask<String, Void, String> {

    private ProgressDialog progressDialog;
    private String message;
    private Context context;

    public asyncTask(String msg, Context ctx) {
        this.context = ctx;
        message = msg;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog = new ProgressDialog(context);
        progressDialog.show(context, "", message, true, false);
    }

    @Override
    protected String doInBackground(String... params) {
        int count = 100000;
        for (int i = 0; i < count; i++) {
           // waste time
        }
        return "Answer";
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        progressDialog.dismiss();
    }
}

Answer 1

Actually your are doing :

progressDialog.show(context, "", message, true, false);

instead it should be like :

progressDialog = ProgressDialog.show(context, "", message, true, false);

You have to statically call show method and assign it to your progressDialog