Question

我有一种可操作以下代码的惯用方法。简言之,该代码检索服务器的数据,并显示其为信息传送方案的屏幕上。它只是一次,但我希望它每3秒管理AsyncTask(试图模拟聊天)。我很相信,这不是建立聊天系统的途径,但我只需要现在能够发挥作用的东西(作为概念的证明),而且我很重视稍后执行这一制度的正确方式。

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.chat_box);// sd

        final Functions function = new Functions();
        final SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(getBaseContext());
        whatroom = prefs.getString("chat", "null");

        new AsyncTask<String, Void, String>() {
            @Override
            protected String doInBackground(String... args) {
                return function.getInbox(args[0]);
            }

            @Override
            protected void onPostExecute(String result) {
                TextView inbox = (TextView) findViewById(R.id.inbox);
                ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar1);
                progressBar.setVisibility(View.GONE);
                inbox.setText(result);
            }

        }.execute(whatroom);
    }

I ve tried putting a simple while statement around the asynctask but, it just force closes.

Answer 1

不能再使用<条码>AsyncTask。你们需要创造新鲜的经历,每次都穿过你。

Answer 2

Without additional information, it s difficult to give you a specific answer. However look into abstracting everything using a Loader, using a Service, etc

关于<代码>Loaders :

They are available to every Activity and Fragment.

They provide asynchronous loading of data.

They monitor the source of their data and deliver new results when the content changes.

They automatically reconnect to the last loader s cursor when being recreated after a configuration change. Thus, they don t need to re-query their data.

友情链接