【java基础知识】【类中的实例变量和方法】

Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            selectorDialog.cancel();
            if (msg.what == 1) {
                newsList = (List<News>) msg.obj;
                listViewAdapter = new MainListViewAdapter(NewsMainActivity.this,
                        newsList);
                listview.setAdapter(listViewAdapter);
            } else if (msg.what == -1) {
                UIHelper.ToastMessage(NewsMainActivity.this, "没有数据");
            } else if (msg.what == -2) {
                UIHelper.ToastMessage(NewsMainActivity.this,
                        R.string.xml_parser_failed);
            }
        }
    };