Wie geschachtelte Arrays von JSON-Objekten zu analysieren

Question

Zunächst weiß ich, dass ähnliche Fragen gestellt wurden. Unter all den Fragen fand ich eine, die mir hilfreich war: https://stackoverflow.com/a/29798632/4293403, aber ich habe Probleme, die akzeptierte Antwort auf meine eigene Szenerie anzuwenden.

Dies ist die Probe JSON Inhalt:

[ 
    { 

    "title": "This a Sample title for each post_title", 

    "excerpt": "And this is a sample of the post_body", 

    "featured_picture": { 

     "source": "https://exapmple.com/blah/blah/image.jpg", 
     "year": "2015", 
     "ownwer": "Akim Man", 

    }, 

    },... 

Und das ist der Code:

//This method will parse json data 
    private void parseData(JSONArray array){ 
     Log.d(TAG, "Parsing array"); 

     for(int i = 0; i<array.length(); i++) { 
      PostItems postItem = new PostItems(); 
      JSONObject jsonObject = null; 
      try { 
       jsonObject = array.getJSONObject(i); 
       postItem.setPost_title(jsonObject.getString(ConfigPost.TAG_POST_TITLE)); 
       postItem.setPost_body(jsonObject.getString(ConfigPost.TAG_POST_BODY)); 

       //Parsing featured_image object 
       for (int f = 0; f<array.length(); f++) { 
        JSONObject object = array.getJSONObject(f); 
        JSONObject postImage = object.getJSONObject("featured_picture"); 
        String imageURL = postImage.getString("source"); 
       } 

       postItem.setPost_image(imageURL(ConfigPost.TAG_POST_IMAGE)); 

      } catch (JSONException w) { 
       w.printStackTrace(); 
       //Toast.makeText(this, "Error in parsing Json", Toast.LENGTH_LONG).show(); 
      } 
      mPostItemsList.add(postItem); 
     } 

    } 

In Zeile postItem.setPost_image(imageURL(ConfigPost.TAG_POST_IMAGE)); Android Studio ist red_highlighting imageURL und wenn ich es schweben sehe ich: "Die Methode 'imageURL (java.lang.String)' kann nicht aufgelöst werden.

Bitte, was mache ich falsch?

Stacktrace von Implementaing Shadab Ansari

04-01 23:47:51.372 747-775/? D/StatusBarManagerService: manageDisableList userId=0 what=0x0 pkg=Window{74ca6f8 u0 com.example.Poster/com.example.Poster.MainActivity} 
04-01 23:47:51.372 17672-17672/com.example.Poster D/MainActivity: Parsing array 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.parseData(MainActivity.java:153) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity.access$000(MainActivity.java:43) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:118) 
04-01 23:47:51.382 17672-17672/com.example.Poster W/System.err:  at com.example.Poster.MainActivity$2.onResponse(MainActivity.java:109) 
04-01 23:47:57.708 747-798/? W/InputDispatcher: channel '74ca6f8 com.example.Poster/com.example.Poster.MainActivity (server)' ~ Consumer closed input channel or an error occurred. events=0x9 
04-01 23:47:57.708 747-798/? E/InputDispatcher: channel '74ca6f8 com.example.Poster/com.example.Poster.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 
04-01 23:47:57.708 747-823/? W/InputDispatcher: Attempted to unregister already unregistered input channel '74ca6f8 com.example.Poster/com.example.Poster.MainActivity (server)' 
04-01 23:47:57.708 747-823/? I/WindowState: WIN DEATH: Window{74ca6f8 u0 com.example.Poster/com.example.Poster.MainActivity} 
04-01 23:47:57.718 747-1385/? W/ActivityManager: Force removing ActivityRecord{ded20d6 u0 com.example.Poster/.MainActivity t19141}: app died, no saved state 

Answer 1

Sie haben keine solche Methode in Ihrem Code Antwort -

imageURL(String param) 

Ich glaube, Sie nur imageURL festlegen möchten. In diesem Fall sollte Ihr Code wie folgt aussehen:

for (int f = 0; f<array.length(); f++) { 
        JSONObject object = array.getJSONObject(f); 
        JSONObject postImage = object.getJSONObject("featured_picture"); 
        String imageURL = postImage.getString("source"); 
    postItem.setPost_image(imageURL); 
       }