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我正在尝试通过启动 TCP 服务器来访问 android 网络。但是当我创建一个新线程时,要么通过 Thread t = new Thread(runnable); t.start();

或者FutureTask我仍然得到networkonmainthreadexception...

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2 回答 2

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使用 AsyncTask 执行网络相关操作

例如 :

private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... urls) {
      String response = "";
      for (String url : urls) {
        DefaultHttpClient client = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url);
        try {
          HttpResponse execute = client.execute(httpGet);
          InputStream content = execute.getEntity().getContent();

          BufferedReader buffer = new BufferedReader(new InputStreamReader(content));
          String s = "";
          while ((s = buffer.readLine()) != null) {
            response += s;
          }

        } catch (Exception e) {
          e.printStackTrace();
        }
      }
      return response;
    }

    @Override
    protected void onPostExecute(String result) {
      textView.setText(result);
    }
  } 

或者你可以这样做,虽然不推荐

    if (android.os.Build.VERSION.SDK_INT > 9) {
        StrictMode.ThreadPolicy policy = 
                new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        }

添加此代码将不再为您提供主线程异常上的网络。

于 2013-06-15T19:20:26.650 回答
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您必须在线程中可运行的 run() 函数上执行实际的网络 IO。您不只是创建一个线程然后执行 IO。

于 2013-06-15T19:18:42.940 回答