Android如何通过Json发送数据字符串到服务器？

Question

我需要发送一些由我的Android应用程序中的edittext输入的数据，但我不明白我必须如何为服务器端做代码！我在PHP 5.3上。

Answer 1

你可以通过使用查询字符串。但为此，你需要一个服务器端的api。 要发送服务器端数据u可以使用此代码： -

public String connect(String url) 
    {//for connect to database(QueryString API) 
     String userID = null; 
     HttpClient httpc = new DefaultHttpClient(); 
     try 
     { 
     HttpPost post = new HttpPost(url); 

      HttpResponse response = httpc.execute(post); 
      if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) 
      { 
       userID = EntityUtils.toString(response.getEntity()); 
       Log.v("Login response", "" + userID); 
      } 
     } 
     catch (ClientProtocolException e) 
     { 
      e.printStackTrace(); 
     } 
     catch (IOException e) 
     { 
      e.printStackTrace(); 
     } 
     return userID; 
    } 

public void abcd(String a1, String a2, String a3, 
      String a4, String a5) { 

     String QS ="";//acc. to ur data 
     String finalURL2 = url + QS; 

     String result2 = connect(finalURL2); 
     Log.v("message", result2); 
    } 

Answer 2

it Depends how your server side is implemented Normally sending data Requires Either HTTPPost Method or HTTPPut methods. More commonly used is HTTPPost methods That has header data and Body Data 

you need to do it in following way 

1- convert your json object to String 

user.toString(); 
2- add Targeted URL 

String URL="Enter URL here"; 
3- add url to the request 

response = dohttpPostWithCode(URL.toString(),user.toString()); 
response is String [ ] that have 2 index i- for response code ii- for data 

4- method to handle data 

public String[] dohttpPostWithCode(String url,String postParameters) throws Exception { 
     URL weburl = new URL(url); 
     URI uri = new URI(weburl.getProtocol(), weburl.getUserInfo(), weburl.getHost(), weburl.getPort(), weburl.getPath(), weburl.getQuery(), weburl.getRef()); 
      BufferedReader in = null; 
      String[] result = new String[2];   
      try { 
       HttpParams httpParameters = new BasicHttpParams(); 
       // Set the timeout in milliseconds until a connection is established. 
       int timeoutConnection = 20000; 
       HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); 
       // Set the default socket timeout (SO_TIMEOUT) 
       // in milliseconds which is the timeout for waiting for data. 
       int timeoutSocket = 20000; 
       HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); 
       HttpURLConnection httpURL=(HttpURLConnection) weburl.openConnection(); 
       httpURL.setDoOutput(true); 
       httpURL.setDoInput(true); 
       httpURL.setRequestMethod("POST"); 
       HttpClient client =new DefaultHttpClient(httpParameters);    
       HttpPost httpPost = new HttpPost(uri); 
       //httpPost.addHeader("language","en"); 
       httpPost.addHeader("Content-Type", "application/json"); 

       // StringEntity entity = new StringEntity(postParameters, HTTP.UTF_8); 
       httpPost.setEntity(new StringEntity(postParameters)); 
       // httpPost.setEntity(entity); 
       // httpPost.setEntity(new UrlEncodedFormEntity(postParameters)); 
       HttpResponse response = client.execute(httpPost);    
       in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 
       StringBuffer sb = new StringBuffer(""); 
       String line = ""; 
       String NL = System.getProperty("line.separator"); 

       while ((line = in.readLine()) != null) { 
        sb.append(line + NL); 
       } 
       in.close(); 
/*    String result = sb.toString(); 
       return result;*/ 
       result[0] = response.getStatusLine().getStatusCode()+""; 
       result[1] = sb.toString(); 
       return result; 
      } finally { 
       if (in != null) { 
        try { 
         in.close(); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 
     }