Question

I am trying to display a dialog to the user when I invoke an AsynchTask.

I am trying to use the onPreExecute method like this:

     protected void onPreExecute(Long result) 
     {
         dialog = new Dialog(UpdateProfileActivity.this);

         dialog.setContentView(R.layout.please_wait);
         dialog.setTitle("Updating account details...");

         dialog.show();      
     }

and then in onPostExecute method do this:

    @Override
    protected void onPostExecute(String result) 
    {    
        try {
            dialog.dismiss();
        } catch (Exception ee) {
            // nothing
        }

But the dialog does not show up. I looked at the documentation and even though there are mentions of onPreExecute, I am not sure how it is used. Mine is simply never called.

What is the proper use of it and how do I make sure the dialogs are properly opened and closed?

Thank you!

Answer 1

Your onPreExecute method is never called, because you are not overriding it properly.
The correct method signature should be:

@Override
protected void onPreExecute(){
    //Your code
}

As a general tip, always use the @Override annotation when overriding methods. When you try to override a method that doesn’t exist, or when you’ve typed something wrong, an error appears.