迭代通過JSON對象android

Question

如何迭代通過JSON對象來獲取JSON數組在android 我的代碼不返回我的JSON數組中的值，我認爲這是因爲它不是我的JSON對象中的第一項原因大多數我使用的JSON數組通常是他們的JSON對象中的第一個項目......當我替換JSON對象時，代碼完美工作......我只需要知道如何獲得「項目」...請

JSON: { 
    "total_count": 9, 
    "incomplete_results": false, 
    "items": [ 
    { 
     "login": "unicodeveloper", 
     "id": 2946769, 
     "avatar_url": "https://avatars2.githubusercontent.com/u/2946769?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/unicodeveloper", 
     "html_url": "https://github.com/unicodeveloper", 
     "followers_url": "https://api.github.com/users/unicodeveloper/followers", 
     "following_url": "https://api.github.com/users/unicodeveloper/following{/other_user}", 
     "gists_url": "https://api.github.com/users/unicodeveloper/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/unicodeveloper/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/unicodeveloper/subscriptions", 
     "organizations_url": "https://api.github.com/users/unicodeveloper/orgs", 
     "repos_url": "https://api.github.com/users/unicodeveloper/repos", 
     "events_url": "https://api.github.com/users/unicodeveloper/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/unicodeveloper/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "ireade", 
     "id": 8677283, 
     "avatar_url": "https://avatars2.githubusercontent.com/u/8677283?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/ireade", 
     "html_url": "https://github.com/ireade", 
     "followers_url": "https://api.github.com/users/ireade/followers", 
     "following_url": "https://api.github.com/users/ireade/following{/other_user}", 
     "gists_url": "https://api.github.com/users/ireade/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/ireade/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/ireade/subscriptions", 
     "organizations_url": "https://api.github.com/users/ireade/orgs", 
     "repos_url": "https://api.github.com/users/ireade/repos", 
     "events_url": "https://api.github.com/users/ireade/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/ireade/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "christiannwamba", 
     "id": 8108337, 
     "avatar_url": "https://avatars1.githubusercontent.com/u/8108337?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/christiannwamba", 
     "html_url": "https://github.com/christiannwamba", 
     "followers_url": "https://api.github.com/users/christiannwamba/followers", 
     "following_url": "https://api.github.com/users/christiannwamba/following{/other_user}", 
     "gists_url": "https://api.github.com/users/christiannwamba/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/christiannwamba/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/christiannwamba/subscriptions", 
     "organizations_url": "https://api.github.com/users/christiannwamba/orgs", 
     "repos_url": "https://api.github.com/users/christiannwamba/repos", 
     "events_url": "https://api.github.com/users/christiannwamba/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/christiannwamba/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "ibrahimlawal", 
     "id": 458428, 
     "avatar_url": "https://avatars1.githubusercontent.com/u/458428?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/ibrahimlawal", 
     "html_url": "https://github.com/ibrahimlawal", 
     "followers_url": "https://api.github.com/users/ibrahimlawal/followers", 
     "following_url": "https://api.github.com/users/ibrahimlawal/following{/other_user}", 
     "gists_url": "https://api.github.com/users/ibrahimlawal/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/ibrahimlawal/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/ibrahimlawal/subscriptions", 
     "organizations_url": "https://api.github.com/users/ibrahimlawal/orgs", 
     "repos_url": "https://api.github.com/users/ibrahimlawal/repos", 
     "events_url": "https://api.github.com/users/ibrahimlawal/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/ibrahimlawal/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "emekaonu", 
     "id": 3802882, 
     "avatar_url": "https://avatars2.githubusercontent.com/u/3802882?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/emekaonu", 
     "html_url": "https://github.com/emekaonu", 
     "followers_url": "https://api.github.com/users/emekaonu/followers", 
     "following_url": "https://api.github.com/users/emekaonu/following{/other_user}", 
     "gists_url": "https://api.github.com/users/emekaonu/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/emekaonu/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/emekaonu/subscriptions", 
     "organizations_url": "https://api.github.com/users/emekaonu/orgs", 
     "repos_url": "https://api.github.com/users/emekaonu/repos", 
     "events_url": "https://api.github.com/users/emekaonu/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/emekaonu/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "moyheen", 
     "id": 8110201, 
     "avatar_url": "https://avatars1.githubusercontent.com/u/8110201?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/moyheen", 
     "html_url": "https://github.com/moyheen", 
     "followers_url": "https://api.github.com/users/moyheen/followers", 
     "following_url": "https://api.github.com/users/moyheen/following{/other_user}", 
     "gists_url": "https://api.github.com/users/moyheen/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/moyheen/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/moyheen/subscriptions", 
     "organizations_url": "https://api.github.com/users/moyheen/orgs", 
     "repos_url": "https://api.github.com/users/moyheen/repos", 
     "events_url": "https://api.github.com/users/moyheen/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/moyheen/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "darmie", 
     "id": 848002, 
     "avatar_url": "https://avatars1.githubusercontent.com/u/848002?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/darmie", 
     "html_url": "https://github.com/darmie", 
     "followers_url": "https://api.github.com/users/darmie/followers", 
     "following_url": "https://api.github.com/users/darmie/following{/other_user}", 
     "gists_url": "https://api.github.com/users/darmie/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/darmie/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/darmie/subscriptions", 
     "organizations_url": "https://api.github.com/users/darmie/orgs", 
     "repos_url": "https://api.github.com/users/darmie/repos", 
     "events_url": "https://api.github.com/users/darmie/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/darmie/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "perfectmak", 
     "id": 3120013, 
     "avatar_url": "https://avatars0.githubusercontent.com/u/3120013?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/perfectmak", 
     "html_url": "https://github.com/perfectmak", 
     "followers_url": "https://api.github.com/users/perfectmak/followers", 
     "following_url": "https://api.github.com/users/perfectmak/following{/other_user}", 
     "gists_url": "https://api.github.com/users/perfectmak/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/perfectmak/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/perfectmak/subscriptions", 
     "organizations_url": "https://api.github.com/users/perfectmak/orgs", 
     "repos_url": "https://api.github.com/users/perfectmak/repos", 
     "events_url": "https://api.github.com/users/perfectmak/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/perfectmak/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    }, 
    { 
     "login": "acekyd", 
     "id": 4003538, 
     "avatar_url": "https://avatars1.githubusercontent.com/u/4003538?v=3", 
     "gravatar_id": "", 
     "url": "https://api.github.com/users/acekyd", 
     "html_url": "https://github.com/acekyd", 
     "followers_url": "https://api.github.com/users/acekyd/followers", 
     "following_url": "https://api.github.com/users/acekyd/following{/other_user}", 
     "gists_url": "https://api.github.com/users/acekyd/gists{/gist_id}", 
     "starred_url": "https://api.github.com/users/acekyd/starred{/owner}{/repo}", 
     "subscriptions_url": "https://api.github.com/users/acekyd/subscriptions", 
     "organizations_url": "https://api.github.com/users/acekyd/orgs", 
     "repos_url": "https://api.github.com/users/acekyd/repos", 
     "events_url": "https://api.github.com/users/acekyd/events{/privacy}", 
     "received_events_url": "https://api.github.com/users/acekyd/received_events", 
     "type": "User", 
     "site_admin": false, 
     "score": 1.0 
    } 
    ] 
} 

這裏是我的代碼：

 try { 


      String total_count = jsonobject.optString("total_count"); 
      String incomplete_results = jsonobject.optString("incomplete_results"); 
      JSONArray jsonarray = jsonobject.getJSONArray("items"); 


      for (int i = 0; i < 3; i++) { 
       HashMap<String, String> map = new HashMap<String, String>(); 
       jsonobject = jsonarray.getJSONObject(i); 
       // Retrive JSON Objects 
       map.put("login", jsonobject.getString("login")); 
       map.put("id", jsonobject.getString("id")); 
       //map.put("population", jsonobject.getString("population")); 
       map.put("avatar_url", jsonobject.getString("avatar_url")); 
       // Set the JSON Objects into the array 
       arraylist.add(map); 
      } 
     } catch (JSONException e) { 
      Log.e("Error", e.getMessage()); 
      e.printStackTrace(); 
     } 
     return null; 
    }` 

Answer 1

讓你的JSON存儲在變量json中。

JSONArray items = json.getJSONArray("items"); 
for (int i=0; i<items.length(); i++) { 
    JSONObject item = items.getJSONObject(i); 
    // TODO: get values from 'item' 
} 

如果只想先item：

JSONArray items = json.getJSONArray("items"); 
JSONObject item = items.getJSONObject(0); 

Answer 2

使用此

，如果你的文件存儲在response可變

SONObject json=new JSONObject(response); //here get your json data 
JSONArray jar=json.getJSONArray("items"); 
for (int i=0; i<jar.length(); i++) { 
    JSONObject items = jar.getJSONObject(i);// get values from 'items' 
    String item=items.getString("login"); //get login like this 

} 

Answer 3

你可以得到你的物體，像以下。

try { 
      JSONObject jsonObject = new JSONObject("Your json string"); 
      String total_count = jsonObject.optString("total_count"); 
      String incomplete_results = jsonObject.optString("incomplete_results"); 
      JSONArray array = jsonObject.getJSONArray("items"); 

      if (array != null && array.length() >0){ 
       for (int i = 0; i < array.length(); i++) { 
        JSONObject object = array.getJSONObject(i); 
        String id = object.getString("id"); 
        . 
        . 
        . 

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

Answer 4

試試這個，

  JSONObject obj=new JSONObject(response); 
      int total_count=obj.getInt("total_count"); 
      boolean incomplete_results=obj.getBoolean("incomplete_results"); 

      JSONArray items=obj.getJSONArray("items"); 
      for(int i=0;i<items.length();i++) 
      { 
       JSONObject items_obj=items.getJSONObject(i); 
       String login=items_obj.getString("login"); 
       int id=items_obj.getInt("id"); 
       String avatar_url=items_obj.getString("avatar_url"); 
       String gravatar_id=items_obj.getString("gravatar_id"); 
       String url=items_obj.getString("String"); 
       String html_url=items_obj.getString("html_url"); 
       String followers_url=items_obj.getString("followers_url"); 
       String type=items_obj.getString("type"); 
      }