尝试使用以下mainactivityactivity的setContentView（）内低于code，以避免networkOnmainThread例外。

Try using the below code inside your mainactivityactivity below setContentView() to avoid networkOnmainThread exception..

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

不过，在做内部使用的AsyncTask不阻塞主线程后台线程操作重将是巨大的！

But, doing heavy operation inside background thread using AsyncTask without blocking main thread would be great!

和还提到此链接...

And also refer this link...

的AsyncTask的Andr​​oid例如