Android AsycTask elapsed time calculation

Issue

I'm trying to calculate the time elapsed in the execution of an AsyncTask, but nothing is logged in onPostExecute method, What I'm doing wrong?

Here is a part of my code:

@Override
    protected void onPreExecute() 
    {
        this.dialog.setMessage(mensagem);
        this.dialog.show();
        Date date = new Date();
        startTime = date.getTime();
    }

@Override
    protected void onPostExecute(String result) 
    {

        if(this.dialog.isShowing() && this.dialog != null)
            this.dialog.dismiss();

        Date date = new Date();
        endTime = date.getTime();

        long diffTime = endTime - startTime;
//here nothing is logged in LogCat
        Log.d("TEMPO DE REQUISIÇÃO", String.valueOf(diffTime) + " milisegundos");

Solution

I solve the problem just going to project -> clean and now it is working.

Answered By - Danilo Silva