public void doLogin(View v) {
       String userid = ((EditText) findViewById(R.id.editText)).getText().toString();
       String password = ((EditText) findViewById(R.id.editText2)).getText().toString();
       doAut(v, userid, password);
    }

    public void doAut(View v, String userid,  String password){

        BufferedReader reader = null;
        StringBuilder stringBuilder;

        try{
            URL url = new URL("http://60.51.18.179/kjiisprod/module/test/simbllogin.php?uid=" + userid +"&pwd="+ password);

            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");

            reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
            stringBuilder = new StringBuilder();

            String line =  reader.readLine().toString();

            stringBuilder.append(line.trim());

            if(stringBuilder.toString().equals("1")){
                Intent i = new Intent(this, WelcomeActivity.class);
                startActivity(i);
            }else{
                Toast.makeText(this, "Login Error!. Try again." , Toast.LENGTH_LONG ).show();
            }


        }catch (Exception e){
            e.printStackTrace();
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Toast.makeText(this, exceptionAsString , Toast.LENGTH_LONG).show();
        }
    }