Question

I have button that a user selects and I pop up a AlertDialog to OK or CANCEL operation of replacing some data. The OK and CANCEL work fine after I figured out its an ASYNCH process.
And I even stop multiple clicks. However when the user presses OK , I have to save the information out to memory along with a couple of tasks. The OK process takes about three seconds, which is over the edge of impatient people. I want to throw up a indeterminate progress bar with message. However my newness to Java and android is getting in the way.
Exactly what is the ‘context’ in the code below?

public void getData(final View v)
{
     if(AlertDialogProcessing==0)
     {   
         final String title="Set Image to Wallpaper";
         final String message="Press OK to set as Wallpaper or CANCEL";
         final String ok="OK";
         final String cancel="CANCEL";
         final AlertDialog.Builder alertbox = new AlertDialog.Builder(this);
         try{
              alertbox.setMessage(message);
              alertbox.setTitle(title);
              alertbox.setPositiveButton(ok,new DialogInterface.OnClickListener(){ 
                   public void onClick(DialogInterface arg0, int arg1)
                   {  
                        Vibrate(ClickVibrate); 
                        Drawable drawable= getSun(imageSelect);  
                        ProgressDialog dialog = ProgressDialog.show(context, "Loading", "Please wait...", true);   //<<<<<<<<<<ERROR at context
                        AlertDialogProcessing=1;     
                        SaveData(drawable,1);
                        AlertDialogProcessing=0;
                        dialog.dismiss();
                        Toast.makeText(getApplicationContext(), "Data Saved.",Toast.LENGTH_LONG).show();      
                   } 
              });

              alertbox.setNegativeButton(cancel,new DialogInterface.OnClickListener(){
                   public void onClick(DialogInterface arg0, int arg1){
                        AlertDialogProcessing=0; 
                        Vibrate(ClickVibrate); 
                   } 
              });
              //alertbox.setCanceledOnTouchOutside(false); // maybe a 4.0 problem
              alertbox.show();
        } catch(Exception e){   
              //TODO Handle BadTokenException.    
        }
     }
}

Answer 1

In the onClick() you are creating a progressDialog and you are performing the saveData() activity on the UI thread. What you can do is create an AsyncTask in the OnClick() and in its onPreExecute() show the dialog box, perform the saving action in doInBackground() and in onPostExecute() dismiss the dialog.

The definition of Context is(as per android developer site):

Interface to global information about an application environment.
This is an abstract class whose implementation is provided by the
Android system. It allows access to application-specific resources and
classes, as well as up-calls for application-level operations such as
launching activities, broadcasting and receiving intents, etc.

Hope the explanation helps.