Android Alert Dialog with custom theme

LayoutInflater li = LayoutInflater.from(context);
View promptsView = li.inflate(R.layout.prompts, null);

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(new ContextThemeWrapper(context, android.R.style.Theme_Holo_Light_Dialog));
alertDialogBuilder.setView(promptsView);

final EditText mEditText=(EditText)promptsView.findViewById(R.id.editTextDialogUserInput);
alertDialogBuilder.setMessage("Test for preventing dialog close");
alertDialogBuilder.setPositiveButton("Test",
       new DialogInterface.OnClickListener()
       {
           @Override
           public void onClick(DialogInterface dialog, int which)
           {
             
           }
       });
final AlertDialog dialog = alertDialogBuilder.create();
dialog.show();
//Overriding the handler immediately after show is probably a better approach than OnShowListener as described below
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener()
     {          
         @Override
         public void onClick(View v)
         {
             Boolean wantToCloseDialog = false;
             if (mEditText.getText().toString().trim().equalsIgnoreCase("")) {
             wantToCloseDialog=false;
             Toast.makeText(getApplicationContext(), "Enter Desription", 2000).show();
           
}
             else {
             wantToCloseDialog=true;
}
             if(wantToCloseDialog==true)
             dialog.dismiss();
             //else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
         }
     });