android-如何从SDCard中的文件解析json

Question

hi i want to parse my downloaded json file that stored in the SDCard directory ,

i don't know how can i do that !

im google a lot but i can only find somethings like : BuffredReader , InputFileStream , ...

please help me !

here is part of my code but it have the problem i attached in the image :

File GroupsJsonFileAdress = new File(Enviroments.getExternalStorageDirectory() + "FOLDER/G.json");

try {
        ObjectInputStream groupsInJson = new ObjectInputStream(new FileInputStream(GroupsJsonFileAdress));
        JSONObject jsonObject = (JSONObject)groupsInJson.readObject();
        String DATABASE_VERSION = jsonObject.getString("DBVersion");
        JSONArray groupsArray = jsonObject.getJSONArray("Groups");
        for (int i = 0; i < groupsArray.length(); i++) {
            JSONObject groupJsonObjectReader = groupsArray.getJSONObject(i);
            int id= groupJsonObjectReader.getInt("Id");
            String gTitle = groupJsonObjectReader.getString("title");
            Group loaderG = new Group();
            loaderG.GroupId = id;
            loaderG.Title = gTitle;
            Log.i("INFO", loaderG.Title);
            groupsClasses.add(loaderG);
        }
    } catch (StreamCorruptedException e) {
        e.printStackTrace();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    } 

and here is the error i got : http://i.stack.imgur.com/lQ3YN.jpg

Answer 1

创建一个与您的Json架构匹配的模型，然后使用GSON librarie解析它；）到目前为止，对我来说最简单的方法是:)