Question

Still getting java.lang.StringIndexOutOfBoundsException: index=0 length=0 error in the code below at if (result.charAt(0) =='Y')

Is there any other better way to check for null strings at if (result == null || result.isEmpty()) ? For some reason the null string “result” was not picked up or activity.finish(); did not execute and the next if statement was executed? Any help please.

@Override
    protected void onPostExecute(String result) {

        //check if result null or empty
        if (result == null || result.isEmpty()) {

            Toast.makeText(context, "Could Not Check For Updates, Please Try Again. Closing Application.", Toast.LENGTH_LONG).show();
            activity.finish();
        }           
        //update available
        if (result.charAt(0) =='Y') {

            UpdateAlert();
        }
        //no update available
        else if (result.charAt(0) =='N') {

            Toast.makeText(context, "No Updates Available", Toast.LENGTH_SHORT).show();             
        }
        else {

            Toast.makeText(context, "Could Not Check For Updates, Please Try Again. Closing Application : " + result, Toast.LENGTH_LONG).show();
            activity.finish();
        }   

Answer 1

   if (result == null || result.trim().length()==0) {
         Toast.makeText(context, "Could Not Check For Updates, Please Try Again. Closing  Application.", Toast.LENGTH_LONG).show();
            activity.finish();
        }           
        //update available
        else if (result.charAt(0) =='Y') {
        ^^^^ 
            UpdateAlert();
        }