java - Java HTTP 请求时出错

Question

我尝试通过单击按钮时的 HTTP post 请求上传姓名和分数，但出现奇怪的错误。这是我的代码。

public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
        case R.id.bMenu:
            Intent i = new Intent(ShowScore.this, Menu.class);
            startActivity(i);
            break;
        case R.id.bUpload:
            postData();
            break;
    }
}

private void postData() {

    // Create a new HttpClient and Post Header
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://www.ratemyplays.com/form.php");

    try {
        // Add your data
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
        nameValuePairs.add(new BasicNameValuePair("name", "Steve"));
        nameValuePairs.add(new BasicNameValuePair("score", "24"));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        // Execute HTTP Post Request
        // HttpResponse response = httpclient.execute(httppost);

        // Execute HTTP Post Request
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String responseBody = httpclient.execute(httppost, responseHandler);

        // Just display the response back
        displayToastMessage(responseBody);

    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
    } catch (IOException e) {
        // TODO Auto-generated catch block
    }
}

private void displayToastMessage(String responseBody) {
    // TODO Auto-generated method stub
}

这是我的错误

Invalid layout of java.lang.String at value

A fatal error has been detected by the Java Runtime Environment:

Internal Error (javaClasses.cpp:136), pid=9736, tid=10668 fatal error: Invalid layout of preloaded class

JRE version: (7.0_40-b43) (build ) Java VM: Java HotSpot(TM) 64-Bit Server VM (24.0-b56 mixed mode windows-amd64 compressed oops) Failed to write core dump. Minidumps are not enabled by default on client versions of Windows

Answer 1

如果您查看堆栈跟踪，您可能会发现 NetworkOnMainThreadException。从 Android 3.x 及更高版本开始，您无法在与 UI 相同的线程上运行网络操作。

总之，您需要使用 ASyncTask

来源:Android IllegalStateException: Could not execute method of the activity (我自己测试了代码并跟踪堆栈跟踪发现了这个答案)