private class LoginTask extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void...voids) {

        // Get handles to the two field text objects
        final EditText usernameFieldText = (EditText) findViewById(R.id.usernameField);
        final EditText passwordFieldText = (EditText) findViewById(R.id.passwordField);

        String userName = usernameFieldText.getText().toString();
        String userPassword = passwordFieldText.getText().toString();
        isLoggedIn = connectionHandler.executeLogin(userName, userPassword );


        if (isLoggedIn==false){Toast.makeText(LoginActivity.this, "User/Password Wrong!" ,                                                                  Toast.LENGTH_LONG).show();}
        else {Toast.makeText(LoginActivity.this, "LOGIN SUCCESSFUL!" ,    Toast.LENGTH_LONG).show();}

        return null;


    }

    }