Android 如果没有任何数组，如何解析单个对象

我是android开发领域的新手

如何只解析这个对象

{
    "user_id":21,
    "firstname":"",
    "lastname":"",
    "email":"9654008793",
    "isd_code":"91",
    "mobile":"9654008793",
    "gender":"",
    "dob":"0000-00-00",
    "image":null,
    "status":"0",
    "verification_key":"4518"
}

---

等等

你有一个object的数据，所以你需要这样解析：

JsonObject json=new JsonObject();
json=new JsonObject("response");
String userId=json.getString("user_id");

---

同样，所有其他人都是如此。希望它能帮助您：）

{

表示JSONObject节点

    JSONObject jsono = new JSONObject(mystring);

    String id = jsono.getString("user_id");
    //String firstname = jsono.getString("firstname");
    //String lastname =  jsono.getString("lastname");
    String email = jsono.getString("email");
    String isdcode = jsono.getString("isd_code");
    String mobile = jsono.getString("mobile");
    //String gender = jsono.getString("gender");
    String dob = jsono.getString("dob");
    //String image= jsono.getString("image");
    String status= jsono.getString("status");
    String key= jsono.getString("verification_key"); 

---

如果要获取JSON中的每个对象，请按以下步骤操作：

JSONObject jsonObject = new JSONObject(<Your String Here>);
String strUserID = jsonObject.getString("user_id");
String strFirstName = jsonObject.getString("firstname");
String strLastName = jsonObject.getString("lastname");
String strEmail = jsonObject.getString("email");
........

JSONObject JSONObject=new JSONObject（）；
String strUserID=jsonObject.getString（“用户id”）；
String strFirstName=jsonObject.getString（“firstname”）；
String strLastName=jsonObject.getString（“lastname”）；
String strEmail=jsonObject.getString（“电子邮件”）；
........

使用谷歌gson库，它非常容易使用

你可以在这里找到图书馆：

只需使用与json相同的字段创建一个对象（确保类型是您正在接收的类型（string、int、double等）：

然后将此函数添加到类用户

public class User {
    private int user_id;
    private String firstname;
    private String lastname;
    private String email;
    private int mobile;
    private int isd_code;
    private String gender;
    private String dob;
    private String image;
    private int status;
    private int verification_key;


    public static User getUserFromJson(String json) {

        return new Gson().fromJson(json, User.class);
    }
}

其中json字符串是json，瞧！您返回的是一个java用户对象，其中包含json的信息

如果您在json上接收到一个用户数组

public static ArrayList<User> getUsersFromJson(String json) {
    // TODO Auto-generated method stub
    Type listType = new TypeToken<ArrayList<User>>() {}.getType();
    ArrayList<User> userList = new Gson().fromJson(json, listType);
    return userList;
}

publicstaticarraylistgetusersfromjson（stringjson）{
//TODO自动生成的方法存根
类型listType=newTypeToken（）{}.getType（）；
ArrayList userList=new Gson（）.fromJson（json，listType）；
返回用户列表；
}

---

您将获得一系列用户。

只需遵循以下教程，这将帮助您它帮助了我……）

在您的项目中，创建一个类文件并将其命名为JSONParser.java。解析器类有一个方法，该方法将发出http请求以获取JSON数据并返回JSONObject

public class JSONParser {

static InputStream is = null;
static JSONObject jObj = null;
static String json = "";

// constructor
public JSONParser() {

}

public JSONObject getJSONFromUrl(String url) {

    // Making HTTP request
    try {
        // defaultHttpClient
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();          

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    // try parse the string to a JSON object
    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // return JSON String
    return jObj;

}
}

解析JSON数据并更新到ListView

public class AndroidJSONParsingActivity extends ListActivity {

// url to make request
private static String url = "http://api.androidhive.info/contacts/";

// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";

// contacts JSONArray
JSONArray contacts = null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Hashmap for ListView
    ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();

    // Creating JSON Parser instance
    JSONParser jParser = new JSONParser();

    // getting JSON string from URL
    JSONObject json = jParser.getJSONFromUrl(url);

    try {
        // Getting Array of Contacts
        contacts = json.getJSONArray(TAG_CONTACTS);

        // looping through All Contacts
        for(int i = 0; i < contacts.length(); i++){
            JSONObject c = contacts.getJSONObject(i);

            // Storing each json item in variable
            String id = c.getString(TAG_ID);
            String name = c.getString(TAG_NAME);
            String email = c.getString(TAG_EMAIL);
            String address = c.getString(TAG_ADDRESS);
            String gender = c.getString(TAG_GENDER);

            // Phone number is agin JSON Object
            JSONObject phone = c.getJSONObject(TAG_PHONE);
            String mobile = phone.getString(TAG_PHONE_MOBILE);
            String home = phone.getString(TAG_PHONE_HOME);
            String office = phone.getString(TAG_PHONE_OFFICE);

            // creating new HashMap
            HashMap<String, String> map = new HashMap<String, String>();

            // adding each child node to HashMap key => value
            map.put(TAG_ID, id);
            map.put(TAG_NAME, name);
            map.put(TAG_EMAIL, email);
            map.put(TAG_PHONE_MOBILE, mobile);

            // adding HashList to ArrayList
            contactList.add(map);
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }


    /**
     * Updating parsed JSON data into ListView
     * */
    ListAdapter adapter = new SimpleAdapter(this, contactList,
            R.layout.list_item,
            new String[] { TAG_NAME, TAG_EMAIL, TAG_PHONE_MOBILE }, new int[] {
                    R.id.name, R.id.email, R.id.mobile });

    setListAdapter(adapter);

    // selecting single ListView item
    ListView lv = getListView();

    // Launching new screen on Selecting Single ListItem
    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            // getting values from selected ListItem
            String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
            String cost = ((TextView) view.findViewById(R.id.email)).getText().toString();
            String description = ((TextView) view.findViewById(R.id.mobile)).getText().toString();

            // Starting new intent
            Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
            in.putExtra(TAG_NAME, name);
            in.putExtra(TAG_EMAIL, cost);
            in.putExtra(TAG_PHONE_MOBILE, description);
            startActivity(in);
        }
    });
}

}

公共类AndroidJSONParsingActivity扩展了ListActivity{
//发出请求的url
专用静态字符串url=”http://api.androidhive.info/contacts/";
//JSON节点名称
专用静态最终字符串标记_CONTACTS=“CONTACTS”；
私有静态最终字符串标记\u ID=“ID”；
私有静态最终字符串标记_NAME=“NAME”；
私有静态最终字符串标记\u EMAIL=“EMAIL”；
私有静态最终字符串标记_ADDRESS=“ADDRESS”；
私有静态最终字符串标记_GENDER=“GENDER”；
专用静态最终字符串标记_PHONE=“PHONE”；
专用静态最终字符串标记\u PHONE\u MOBILE=“MOBILE”；
专用静态最终字符串标记\u PHONE\u HOME=“HOME”；
专用静态最终字符串标记\u PHONE\u OFFICE=“OFFICE”；
//联系JSONArray
JSONArray联系人=null；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.main）；
//ListView的Hashmap
ArrayList contactList=新建ArrayList（）；
//创建JSON解析器实例
JSONParser jParser=新的JSONParser（）；
//从URL获取JSON字符串
JSONObject json=jParser.getJSONFromUrl（url）；
试一试{
//获取联系人数组
contacts=json.getJSONArray（TAG_contacts）；
//通过所有触点循环
对于（int i=0；ivalue
地图放置（标签标识，标识）；
地图放置（标签名称、名称）；
地图放置（标签、电子邮件、电子邮件）；
地图放置（标签、手机、手机）；
//将哈希列表添加到ArrayList
联系人列表。添加（地图）；
}
}捕获（JSONException e）{
e、 printStackTrace（）；
}
/**
*将解析的JSON数据更新到ListView中
* */
ListAdapter=新的SimpleAdapter（此，contactList，
R.layout.list_项目，
新字符串[]{TAG\u NAME，TAG\u EMAIL，TAG\u PHONE\u MOBILE}，新int[]{
R.id.name、R.id.email、R.id.mobile}）；
setListAdapter（适配器）；
//选择单个ListView项
ListView lv=getListView（）；
//在选择单个列表项时启动新屏幕
lv.setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
//从选定的ListItem获取值
字符串名称=（（TextView）view.findviewbyd（R.id.name））.getText（）.toString（）；
字符串成本=（（TextView）view.findViewById（R.id.email））.getText（）.toString（）；
字符串描述=（（TextView）view.findviewbyd（R.id.mobile））.getText（）.toString（）；
//开始新的意图
Intent in=新的Intent（getApplicationContext（），SingleMenuItemActivity.class）；
in.putExtra（标签名称、名称）；
in.putExtra（标签、电子邮件、成本）；
in.putExtra（标签、手机、说明）；
星触觉（in）；
}
});
}
}

您也可以查看Gson库@Varun Ajay Gupta您找到解决方案了吗？？？在提供的链接中提供一些内容。简单地说，放置链接不是回答问题的好方法。这个答案应该修改或删除。@Avadhani Y…我希望现在一切都好了…谢谢您的建议：）

public class JSONParser {

static InputStream is = null;
static JSONObject jObj = null;
static String json = "";

// constructor
public JSONParser() {

}

public JSONObject getJSONFromUrl(String url) {

    // Making HTTP request
    try {
        // defaultHttpClient
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();          

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    // try parse the string to a JSON object
    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // return JSON String
    return jObj;

}
}

public class AndroidJSONParsingActivity extends ListActivity {

// url to make request
private static String url = "http://api.androidhive.info/contacts/";

// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";

// contacts JSONArray
JSONArray contacts = null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Hashmap for ListView
    ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();

    // Creating JSON Parser instance
    JSONParser jParser = new JSONParser();

    // getting JSON string from URL
    JSONObject json = jParser.getJSONFromUrl(url);

    try {
        // Getting Array of Contacts
        contacts = json.getJSONArray(TAG_CONTACTS);

        // looping through All Contacts
        for(int i = 0; i < contacts.length(); i++){
            JSONObject c = contacts.getJSONObject(i);

            // Storing each json item in variable
            String id = c.getString(TAG_ID);
            String name = c.getString(TAG_NAME);
            String email = c.getString(TAG_EMAIL);
            String address = c.getString(TAG_ADDRESS);
            String gender = c.getString(TAG_GENDER);

            // Phone number is agin JSON Object
            JSONObject phone = c.getJSONObject(TAG_PHONE);
            String mobile = phone.getString(TAG_PHONE_MOBILE);
            String home = phone.getString(TAG_PHONE_HOME);
            String office = phone.getString(TAG_PHONE_OFFICE);

            // creating new HashMap
            HashMap<String, String> map = new HashMap<String, String>();

            // adding each child node to HashMap key => value
            map.put(TAG_ID, id);
            map.put(TAG_NAME, name);
            map.put(TAG_EMAIL, email);
            map.put(TAG_PHONE_MOBILE, mobile);

            // adding HashList to ArrayList
            contactList.add(map);
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }


    /**
     * Updating parsed JSON data into ListView
     * */
    ListAdapter adapter = new SimpleAdapter(this, contactList,
            R.layout.list_item,
            new String[] { TAG_NAME, TAG_EMAIL, TAG_PHONE_MOBILE }, new int[] {
                    R.id.name, R.id.email, R.id.mobile });

    setListAdapter(adapter);

    // selecting single ListView item
    ListView lv = getListView();

    // Launching new screen on Selecting Single ListItem
    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            // getting values from selected ListItem
            String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
            String cost = ((TextView) view.findViewById(R.id.email)).getText().toString();
            String description = ((TextView) view.findViewById(R.id.mobile)).getText().toString();

            // Starting new intent
            Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
            in.putExtra(TAG_NAME, name);
            in.putExtra(TAG_EMAIL, cost);
            in.putExtra(TAG_PHONE_MOBILE, description);
            startActivity(in);
        }
    });
}

}