User Login

UserLoginFragment.java

final TextView userErrorTextView = (TextView)rootView.findViewById(R.id.user_login_exception_text_view);

        rootView.findViewById(R.id.user_login_button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (userIdLoginEditText.getText() != null
                        && userIdLoginEditText.getText().length() > 0
                        && userPasswordLoginEditText.getText() != null
                        && userPasswordLoginEditText.getText().length() > 0) {

                    InputMethodManager imm = (InputMethodManager)getActivity().getSystemService(
                            Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(userPasswordLoginEditText.getWindowToken(), 0);

                    userErrorTextView.setText(null);
                    updateRefreshItem(true);

                    ParseUser.logInInBackground(userIdLoginEditText.getText().toString(),
                            userPasswordLoginEditText.getText().toString(), new LogInCallback() {
                        @Override
                        public void done(ParseUser parseUser, ParseException e) {
                            updateRefreshItem(false);
                            if (parseUser != null) {
                                // Hooray! The user logged in.
                                Toast.makeText(getActivity(), getResources().getText(R.string.action_username_login_success), Toast.LENGTH_SHORT).show();
                                putNeedUpdate();
                                getActivity().setResult(Activity.RESULT_OK);
                                getActivity().finish();
                            } else {
                                // Sign up failed.
                                userErrorTextView.setText(e.getLocalizedMessage());
                            }
                        }
                    });

                } else {
                    Toast.makeText(getActivity(), getResources().getText(R.string.action_login_form_validate_failure), Toast.LENGTH_SHORT).show();
                }
            }
        });