Question

我正在尝试将一些字符串发送到某个php文件并获取JSON变量。现在我坚持把我的字符串发送到我的php文件，我尝试了许多教程中的很多组合，所有这些都在粉碎：

httpclient.execute(httppost);

我真的不知道为什么。 P.S我在manifest.xml文件中给出了INTERNET权限。这是我的代码看起来除了我以外的任何其他人。

public void send()
{

    String  msg = "Some message text";


    if(msg.length()>0) {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://localhost:8888/file.php");

        try {
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
            nameValuePairs.add(new BasicNameValuePair("id", "01"));
            nameValuePairs.add(new BasicNameValuePair("message", msg));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            httpclient.execute(httppost);// THE APP CRASH HERE!!!
            Toast.makeText(getBaseContext(),"Sent",Toast.LENGTH_SHORT).show();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else {
        Toast.makeText(getBaseContext(),"All fields are required", Toast.LENGTH_SHORT).show();
    }
}

目前我只想传递发送过程（接下来要处理的JSON问题）。

谢谢大家。

这是LogCat：

288-299/system_process W/ActivityManager﹕ Force finishing activity com.example.testphppost/.MainActivity

11-05 17:37:56.011      288-299/system_process W/WindowManager﹕ Failure taking screenshot for (328x546) to layer 21010

11-05 17:37:56.294        37-89/? E/SurfaceFlinger﹕ ro.sf.lcd_density must be defined as a build property

11-05 17:37:56.542      288-302/system_process W/ActivityManager﹕ Activity pause timeout for ActivityRecord{40f0e4c8 u0 com.example.testphppost/.MainActivity}

11-05 17:37:56.762       37-184/? E/SurfaceFlinger﹕ ro.sf.lcd_density must be defined as a build property

11-05 17:37:58.141    2147-2147/? I/Process﹕ Sending signal. PID: 2147 SIG: 9

11-05 17:37:58.161      288-288/system_process I/ActivityManager﹕ Process com.example.testphppost (pid 2147) has died.

11-05 17:37:59.061      288-288/system_process W/InputMethodManagerService﹕ Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@40f27770 attribute=null, token = android.os.BinderProxy@40d32668

有什么想法吗？

Answer 1

很难说是因为你没有提供任何有关异常的信息，但正如Sherif elKhatib所说，你需要异步发送请求。试着看看AsyncTask。

Answer 2

看起来你正试图在主线程上执行网络操作，你不能这样做。尝试AsyncTask或打开新主题。

Answer 3

您可能正在主线程上发出请求。

Answer 4

android的loopback地址是10.0.2.2，但你使用localhost（表示127.0.0.1）尝试更改它。阅读本教程http://www.androidhive.info/2012/01/android-json-parsing-tutorial/

Android我的应用程序崩溃与httpclient.execute（httppost）

4 个答案: