安卓開發之json解析

標籤：

1、從網頁擷取json返回字串
 public class ReadNet extends AsyncTask<URL, Integer, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }
        @Override
        protected String doInBackground(URL... params) {
            StringBuffer sb = new StringBuffer();
            try {
                HttpURLConnection connection = (HttpURLConnection) params[0].openConnection();
                InputStream is = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                String readLine;
                while ((readLine = reader.readLine()) != null) {
                    sb.append(readLine);
                    sb.append("\n");
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return sb.toString();//得到json
        }

        @Override
        protected void onPostExecute(String s) {

            Document doc = Jsoup.parse(s);
            showArticle.setText(doc.toString());
            super.onPostExecute(s);
        }
    }
2、用JSONObject類和JSONArray類解析json字串
 JSONObject jsonObject = new JSONObject(jsonString);//{}
 JSONArray jsonArray = new JSONArray（jsonString）;//[{1},{2}]
 JSONObject jsonObject = jsonArray.optJSONObject(1);
 解析的可以放在list裡面

安卓開發之json解析