private void modifyName(final String name) {
        EmptyWebOperationCallback callback = new EmptyWebOperationCallback(this) {
            @Override
            public void operationExecutedSuccess(WebOperation operation, WebOperation.WebOperationRequestResult data) {

                String modifiedName = PreferenceUtils.get(getApplicationContext(), PREF_MODIFIED_NAME, "");
                Log.d(DEBUG_WCL+TAG, "name = " + modifiedName);

                if (name.equals(modifiedName)) {
                    showToast("昵称未发生改变");
                }

                nameView.setText(name);

                PreferenceUtils.setPreference(getApplicationContext(), PREF_MODIFIED_NAME, nameView.getText().toString());

                User.getUser(MyTaskActivity.this).setDisplayName(name);
            }
        };
        ModUserInfoOperation operation = new ModUserInfoOperation(name, null, callback);
        getScheduler().sendBlockOperation(this, operation, getString(R.string.mytask_modifying_name));
    }