JSONObject和String互相转换

 JSONObject jsonObject = new JSONObject();
        JSONArray jsonArray = new JSONArray();
        try {
            jsonObject.put("a","1");
            jsonObject.put("b","2");
            jsonObject.put("c","3");
            jsonObject.put("d","4");
            for(int i=0;i<10;i++){
                JSONObject object = new JSONObject();
                object.put("name",i+"");
                jsonArray.put(object);
            }
            jsonObject.put("abcd",jsonArray);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        Log.e("MainActivity",jsonObject.toString());

        try {
            JSONObject object = new JSONObject(jsonObject.toString());
            Log.e("MainActivity",object.toString());

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

 输入结果

11-13 14:14:13.846 15433-15433/com.example.apple.demo E/MainActivity:
 {"a":"1","b":"2","c":"3","d":"4","abcd":[{"name":"0"},{"name":"1"},{"name":"2"},{"name":"3"},{"name":"4"},{"name":"5"},{"name":"6"},{"name":"7"},{"name":"8"},{"name":"9"}]}
11-13 14:14:13.846 15433-15433/com.example.apple.demo E/MainActivity: 
{"a":"1","b":"2","c":"3","d":"4","abcd":[{"name":"0"},{"name":"1"},{"name":"2"},{"name":"3"},{"name":"4"},{"name":"5"},{"name":"6"},{"name":"7"},{"name":"8"},{"name":"9"}]}