Android -尝试发送POST请求，抛出无消息的异常

Question

简单的代码：

 String URL = "http://www.google.com";
                        try {
                            HttpClient httpClient = new DefaultHttpClient();
                            HttpPost httpPost = new HttpPost("http://xocircle.freeiz.com/index.php?id=425231&data=joiragiiij99newooo");
                            // Add your data
                            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(2);
                            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairList));
                            // execute HTTP post request
                            HttpResponse response = httpClient.execute(httpPost);
                        } catch(Exception ex) {
                            ex.printStackTrace();
                            Log.w("Error", ex.getMessage());
                        }

我在我的android应用程序上运行它，它使应用程序崩溃。下面是要传达的信息：

04-15 18:21:27.645  16150-16150/com.nimrod.xocircle W/Error﹕ Try to send
04-15 18:21:27.765  16150-16150/com.nimrod.xocircle W/System.err﹕ android.os.NetworkOnMainThreadException
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1156)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)

04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at java.net.InetAddress.getAllByName(InetAddress.java:214)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:167)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:125)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.executeOriginal(DefaultRequestDirector.java:1227)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:677)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at com.nimrod.xocircle.PlayBoard$1.onClick(PlayBoard.java:94)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.view.View.performClick(View.java:4630)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.view.View$PerformClick.run(View.java:19339)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:733)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.os.Looper.loop(Looper.java:157)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5335)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:515)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
04-15 18:21:27.770  16150-16150/com.nimrod.xocircle W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
04-15 18:21:27.775  16150-16150/com.nimrod.xocircle W/System.err﹕ at dalvik.system.NativeStart.main(Native Method)
04-15 18:21:27.775  16150-16150/com.nimrod.xocircle W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41fcdc08)

但是我不能理解我自己。

我确实有权限，而且我确实有互联网连接。

有什么帮助吗？

Answer 1

你有一个android.os.NetworkOnMainThreadException，你需要在一个线程中执行所有的网络操作。因此，只需将代码包装在线程或异步任务中，它就应该可以工作。

Answer 2

您可以使用

    new Thread(new Runnable()
    {
        @Override
        public void run()
        {

        }
    }).start();

并将您的代码放入run方法中。