android-如何更新JSON文件数组中的特定对象？

概述内部存储中json文件的格式如下：{"appointments":[{"appointmentId":"app_001","appointmentTitle":"AppointmentTitle1","appointmentDate":"2017-11-25","appointmentTime":&quo

内部存储中Json文件的格式如下：

{"appointments": [{  "appointmentID": "app_001",  "appointmentTitle": "Appointment Title1",  "appointmentDate": "2017-11-25",  "appointmentTime": "10:30",  "appointmentStatus": "active",  "appointmentType": "meeting",  "reminder": {    "type": "notification",    "time": "10:15",    "status": "off"  },  "appointmentDescription": "blablablablabla1"},{  "appointmentID": "app_002",  "appointmentTitle": "AppointmentTitle2",  "appointmentDate": "2017-11-26",  "appointmentTime": "09:00",  "appointmentStatus": "done",  "appointmentType": "exam",  "reminder": {    "type": "alarm",    "time": "08:45",    "status": "on"  },  "appointmentDescription": "blablablablabla2"}]}

我需要更新具有app_001作为约会ID的约会标题的值

我的职责是

String configfileString = "";            file configfile = new file(getApplicationContext().getExternalfilesDir("/appointments"), "appointments.Json");            try {                configfileString = getStringFromfile(configfile.toString());                JsONObject Json = new JsONObject(configfileString);                JsONArray array = Json.getJsONArray("appointments");            } catch (Exception e) {                e.printstacktrace();            }

我需要对代码进行哪些修改？请帮助,在此先感谢.

解决方法:

在这里,您只需遍历数组并更新数据：

JsONArray array = Json.getJsONArray("appointments");for(int i=0;i < array.length(); i++){    JsONObject object = array.getJsONObject(i);    String ID = object.getString("appointmentID");    if (ID.equals("app_001")){       object.put("appointmentTitle","your value updated");    }}String stringJsON = array.toString();//save your data

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