Android 发布请求

Question

我有 javascript 代码，我试图在 android 应用程序中模仿：

这是 javascript 代码：

text = '{"username":"Hello","password":"World"}';
x.open("POST", url);
x.setRequestHeader("Content-type", "application/json");
x.setRequestHeader("Content-length", text.length);
x.send(text);

这是我到目前为止的 android 应用程序（不起作用）：

HttpClient httpclient = new DefaultHttpClient(); 
HttpPost httppost = new HttpPost(url);                   
httppost.setHeader("Content-type", "application/json");
String text = "\"{\"username\":\"Hello\",\"password\":\"World\"}\"";
httppost.setHeader("Content-length",Integer.toString(text.length()));
httppost.setEntity(new StringEntity(text));
HttpResponse response = httpclient.execute(httppost); 

当我尝试在 eclipse 上调试此代码时，模拟器会保留在调试器挂起时运行。谢谢！

注意：它挂在 httpclient.execute(httppost) 上

Answer 1

这是我用于 Android post 请求的代码：

HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("fullurl");

List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("parameter", "variable");
post.setEntity (new UrlEncodedFormEntity(pairs));

HttpResponse response = client.execute(post);

...等等。

Answer 2

尝试一下：

HttpClient httpclient = new DefaultHttpClient(); 
HttpPost httppost = new HttpPost(url);  
JSONObject json = new JSONObject();
try{
      json.put("username", "Hello");
      json.put("password", "World");
      StringEntity se = new StringEntity(json.toString());  
      se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
      post.setEntity(se);
      HttpResponse response = httpclient.execute(httppost); 
      /*Checking response */
      if(response!=null){
          InputStream in = response.getEntity().getContent(); //Get the data in the entity

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

Answer 3

您是否想将 HttpPost 路径设置为 path。我认为您挂起是因为您没有给 HttpPost 提供有效的 URL。您需要将此行修改

HttpPost httppost = new HttpPost("path"); 

为类似的内容

HttpPost httppost = new HttpPost("actual/url/path"); 

Answer 4

与 JS 版本相比，您的文本字符串的开头和结尾有额外的语音标记吗？

Answer 5

 // Create a new HttpClient and Post Header
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(StringUrl);

    try {
        // Add your data
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
        nameValuePairs.add(new BasicNameValuePair("id", "12345"));
        nameValuePairs.add(new BasicNameValuePair("stringdata", "Hi"));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));



        // Execute HTTP Post Request
        HttpResponse response = httpclient.execute(httppost);
        System.out.println("rep => " + response);


    } catch (IOException e) {
       System.out.println(e);
    }
}