如何在android中创建JSON格式的数据？

我需要向服务器传递一些参数，如下所示 格式

那么如何在android中生成这种格式呢

我尝试使用，但它在

obj.writeJSONString（out）处显示错误这行。谁能帮我解决这个问题

提前感谢
您可以使用
JSONObject
并用它构建数据

这是你的电话号码

但这并不是说，您想要的输出是JSONObject中的JSONArray和另一个JSONObject中的JSONObject。因此，您可以分别创建它们，然后将它们放在一起。如下

try {
            JSONObject parent = new JSONObject();
            JSONObject jsonObject = new JSONObject();
            JSONArray jsonArray = new JSONArray();
            jsonArray.put("lv1");
            jsonArray.put("lv2");

            jsonObject.put("mk1", "mv1");
            jsonObject.put("mk2", jsonArray);
            parent.put("k2", jsonObject);
            Log.d("output", parent.toString(2));
        } catch (JSONException e) {
            e.printStackTrace();
        }

输出-

       {
           "k2": {
             "mk1": "mv1",
             "mk2": [
               "lv1",
               "lv2"
             ]
           }
         }

首先，您必须创建单独的类HttpUtil.java

public class HttpUtil {

// lat=50.2911 lon=8.9842

private final static String TAG = "DealApplication:HttpUtil";

public static String get(String url) throws ClientProtocolException,
        IOException {
    Log.d(TAG, "HTTP POST " + url);
    HttpGet post = new HttpGet(url); 
    HttpResponse response = executeMethod(post);
    return getResponseAsString(response);
}

public static String post(String url, HashMap<String, String> httpParameters)
        throws ClientProtocolException, IOException {
    Log.d(TAG, "HTTP POST " + url);
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
            httpParameters.size());
    Set<String> httpParameterKeys = httpParameters.keySet();
    for (String httpParameterKey : httpParameterKeys) {
        nameValuePairs.add(new BasicNameValuePair(httpParameterKey,
                httpParameters.get(httpParameterKey)));
    }

    HttpPost method = new HttpPost(url);
    UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePairs);
    System.out.println("**************Request=>"+urlEncodedFormEntity.toString());
    method.setEntity(urlEncodedFormEntity);
    HttpResponse response = executeMethod(method);

    return getResponseAsString(response);
}

private static HttpResponse executeMethod(HttpRequestBase method)
        throws ClientProtocolException, IOException {
    HttpResponse response = null;
    HttpClient client = new DefaultHttpClient();
    response = client.execute(method);
    Log.d(TAG, "executeMethod=" + response.getStatusLine());
    return response;
}

private static String getResponseAsString(HttpResponse response)
        throws IllegalStateException, IOException {
    String content = null;
    InputStream stream = null;
    try {
        if (response != null) {
            stream = response.getEntity().getContent();
            InputStreamReader reader = new InputStreamReader(stream);
            BufferedReader buffer = new BufferedReader(reader);
            StringBuilder sb = new StringBuilder();
            String cur;
            while ((cur = buffer.readLine()) != null) {
                sb.append(cur + "\n");
            }
            content = sb.toString();
            System.out.println("**************Response =>"+content);
        }
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
    return content;
}

}

公共类HttpUtil{
//纬度=50.2911经度=8.9842
私有最终静态字符串TAG=“DealApplication:HttpUtil”；
公共静态字符串get（字符串url）抛出ClientProtocolException，
IOException{
Log.d（标记“HTTP POST”+url）；
HttpGet post=新的HttpGet（url）；
HttpResponse响应=执行方法（post）；
返回getResponseAsString（响应）；
}
公共静态字符串post（字符串url、HashMap httpParameters）
抛出ClientProtocolException，IOException{
Log.d（标记“HTTP POST”+url）；
List name valuepairs=new ArrayList(
httpParameters.size（））；
设置httpParameterKeys=httpParameters.keySet（）；
用于（字符串httpParameterKey:httpParameterKeys）{
添加（新的BasicNameValuePair（httpParameterKey，
get（httpParameterKey））；
}
HttpPost方法=新的HttpPost（url）；
UrlEncodedFormEntity UrlEncodedFormEntity=新的UrlEncodedFormEntity（nameValuePairs）；
System.out.println（“************请求=>”+urlEncodedFormEntity.toString（））；
方法.setEntity（urlEncodedFormEntity）；
HttpResponse响应=执行方法（方法）；
返回getResponseAsString（响应）；
}
私有静态HttpResponse executeMethod（HttpRequestBase方法）
抛出ClientProtocolException，IOException{
HttpResponse响应=null；
HttpClient=new DefaultHttpClient（）；
响应=client.execute（方法）；
Log.d（标记，“executeMethod=“+response.getStatusLine（））；
返回响应；
}
私有静态字符串getResponseAsString（HttpResponse响应）
抛出IllegalStateException，IOException{
字符串内容=null；
InputStream=null；
试一试{
if（响应！=null）{
stream=response.getEntity（）.getContent（）；
InputStreamReader reader=新的InputStreamReader（流）；
BufferedReader buffer=新的BufferedReader（读卡器）；
StringBuilder sb=新的StringBuilder（）；
串电流；
而（（cur=buffer.readLine（））！=null）{
sb.追加（cur+“\n”）；
}
content=sb.toString（）；
System.out.println（“************响应=>”+内容）；
}
}最后{
if（流！=null）{
stream.close（）；
}
}
返回内容；
}
}
此示例有助于您调用此函数，它将以字符串值的形式返回JSON。。试试看

 public String getResult() {
    JSONObject userResults = null;
    try {
        userResults = new JSONObject();
        userResults.put("valueOne",str_one);
        userResults.put("valueTwo", str_two);
        userResults.put("valueThree" ,str_three);
        userResults.put("valueFour", str_four);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return userResults.toString();
}

您可以发布异常详细信息吗？您是否正在导入
org.json.JSONObject
？+1我对json解析不熟悉。这个清晰的例子就是我所需要的：-）@LalitPoptani
Log.d（“output”，parent.toString（2））中的
2
是什么？是间距吗？@Compaqle202x是的，是Json输出中的间距和格式。
public class HttpUtil {

// lat=50.2911 lon=8.9842

private final static String TAG = "DealApplication:HttpUtil";

public static String get(String url) throws ClientProtocolException,
        IOException {
    Log.d(TAG, "HTTP POST " + url);
    HttpGet post = new HttpGet(url); 
    HttpResponse response = executeMethod(post);
    return getResponseAsString(response);
}

public static String post(String url, HashMap<String, String> httpParameters)
        throws ClientProtocolException, IOException {
    Log.d(TAG, "HTTP POST " + url);
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
            httpParameters.size());
    Set<String> httpParameterKeys = httpParameters.keySet();
    for (String httpParameterKey : httpParameterKeys) {
        nameValuePairs.add(new BasicNameValuePair(httpParameterKey,
                httpParameters.get(httpParameterKey)));
    }

    HttpPost method = new HttpPost(url);
    UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePairs);
    System.out.println("**************Request=>"+urlEncodedFormEntity.toString());
    method.setEntity(urlEncodedFormEntity);
    HttpResponse response = executeMethod(method);

    return getResponseAsString(response);
}

private static HttpResponse executeMethod(HttpRequestBase method)
        throws ClientProtocolException, IOException {
    HttpResponse response = null;
    HttpClient client = new DefaultHttpClient();
    response = client.execute(method);
    Log.d(TAG, "executeMethod=" + response.getStatusLine());
    return response;
}

private static String getResponseAsString(HttpResponse response)
        throws IllegalStateException, IOException {
    String content = null;
    InputStream stream = null;
    try {
        if (response != null) {
            stream = response.getEntity().getContent();
            InputStreamReader reader = new InputStreamReader(stream);
            BufferedReader buffer = new BufferedReader(reader);
            StringBuilder sb = new StringBuilder();
            String cur;
            while ((cur = buffer.readLine()) != null) {
                sb.append(cur + "\n");
            }
            content = sb.toString();
            System.out.println("**************Response =>"+content);
        }
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
    return content;
}

}

 public String getResult() {
    JSONObject userResults = null;
    try {
        userResults = new JSONObject();
        userResults.put("valueOne",str_one);
        userResults.put("valueTwo", str_two);
        userResults.put("valueThree" ,str_three);
        userResults.put("valueFour", str_four);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return userResults.toString();
}