在 Android 中使用 Gson 从通知数据解析嵌套的 JSON 数组
Parse Nested JSON Array from Notification Data using Gson in Android
我正在从 FCM 通知中获取 JSON 格式的数据。它根据通知类型具有不同的格式,如下所示:
格式 1: accept_request:
{
"alert": "Accept Request By driver",
"title": "Accept Request By driver",
"booking_id": "247",
"notification_type": "accept_request"
}
格式二:end_request:
{
"alert": "End trip By driver",
"title": "End trip By driver",
"booking_id": "247",
"notification_type": "end_request",
"servicesList": [
{
"service_id": "1",
"service_name": "Services1",
"status": "true",
"sub_category": [
{
"sub_cat_id": "1",
"sub_cat_name": "Doctors on call",
"service_cost": "15.00",
"service_cat_id": "1",
"cost": 0
}
],
"is_multiple_choose": "0",
"total_cost": 15
}
}
我已经将 CommonNotificationBean.java
创建为 POJO class。我已成功解析 accept_request
.
的数据
它的工作原理是因为所有键都有字符串值并且 remoteMessage.getData()
还返回 Map<String, String>
类型值。
代码:
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData().get("notification_type"));
Map<String, String> params = remoteMessage.getData();
JSONObject object = new JSONObject(params);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(object.toString()));
reader.setLenient(true);
CommonNotificationBean bean = gson.fromJson(reader, CommonNotificationBean.class);
sendNotification(bean);
}
问题:
现在我在解析 end_request
数据时遇到了问题,因为它有嵌套的 JSON 数组。
仔细阅读:
我可以为动态数据做什么而不是 Map<String, String>
因为它不会将数据转换为 Map<String, String>
类型,因为它有一些 List
输入值。
有人可以帮忙吗?
很简单,您只需要一个具有属性 alert
、title
和 notification_type
的抽象 Notification 对象即可。然后,根据你可能的类型有具体的实现,到目前为止:
AcceptRequestNotification extends Notification
只有一个 int booking_id
(这是你已经拥有的那个,你称之为 CommonNotificationBean 的那个)
EndRequestNotification extends Notification
其中包含例如一个名为 servicesList
的 ArrayList,此 ArrayList 应为 Service
类型,然后服务将具有属性:service_id
, service_name
、status
、sub_category
这又是另一个自定义类型的 ArrayList。
然后您只需将代码更改为:
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData().get("notification_type"));
Map<String, String> params = remoteMessage.getData();
JSONObject object = new JSONObject(params);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(object.toString()));
reader.setLenient(true);
Class typeOf;
switch(remoteMessage.getData().get("notification_type")) {
case "accept_request":
typeOf = AcceptRequestNotification.class;
break;
case "end_request":
typeOf = EndRequestNotification.class;
break;
}
//you can cast this object later on (to the corresponding custom subclass of Notification), based on the notif.getNotificationType() value.
Notification notif = gson.fromJson(reader, typeOf);
sendNotification(notif);
}
最后我通过添加一些概念得到了解决方案。 :)
我在 JSON 中使用正确的格式进行转换时遇到了很多问题,例如:
- 字符处的未终止对象
- MalformedJsonException
最后,以下代码对我有用。
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "remoteMessage.getData() : " + remoteMessage.getData());
// Map<String, String> stringStringMap = remoteMessage.getData();
JSONObject object = new JSONObject(remoteMessage.getData());
Log.d(TAG, "new JSONObject(remoteMessage.getData()) : " + object.toString());
String finalJSON = object.toString().replaceAll("\\", "").replace("\"[", "[").replace("]\"", "]");
Log.d(TAG, "Replace all back slash and invalid double quotes : " + finalJSON);
CommonNotificationBean bean = new Gson().fromJson(finalJSON, CommonNotificationBean.class);
sendNotification(bean);
}
Logcat:
remoteMessage.getData(): 获取不带双引号的数据。
remoteMessage.getData() : {content-available=1, notification_type=end_request, booking_id=247, priority=high, base_price=35, totalMinutePrice=1.5, alert=End trip By driver, sound=default, title=End trip By driver, total_amount=397, address_from=A/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India, service_cost=360, servicesList=[{"total_cost":15,"sub_category":[{"cost":0,"sub_cat_name":"Doctors on call","sub_cat_id":"1","service_cost":"15.00","service_cat_id":"1"}],"service_name":"Services1","service_id":"1","is_multiple_choose":"0","status":"true"},{"total_cost":95,"sub_category":[{"cost":0,"sub_cat_name":"Hand","sub_cat_id":"3","service_cost":"20.00","service_cat_id":"2"},{"cost":0,"sub_cat_name":"Body","sub_cat_id":"4","service_cost":"75.00","service_cat_id":"2"}],"service_name":"Dressing","service_id":"2","is_multiple_choose":"1","status":"true"},{"total_cost":0,"sub_category":[{"cost":0,"sub_cat_name":"No","sub_cat_id":"7","service_cost":"0.00","service_cat_id":"3"}],"service_name":"Do you need oxygen?","service_id":"3","is_multiple_choose":"0","status":"true"},{"total_cost":30,"sub_category":[{"cost":0,"sub_cat_name":"Level 3","sub_cat_id":"10","service_cost":"30.00","service_cat_id":"4"}],"service_name":"Lift\/Stairs Accessibility","service_id":"4","is_multiple_choose":"0","status":"true"},{"total_cost":220,"sub_category":[{"cost":0,"sub_cat_name":"Ventilator","sub_cat_id":"12","service_cost":"100.00","service_cat_id":"5"},{"cost":0,"sub_cat_name":"Intracenous (IV) drip","sub_cat_id":"13","service_cost":"120.00","service_cat_id":"5"}],"service_name":"Other Medical","service_id":"5","is_multiple_choose":"1","status":"true"},{}], tripdatetime=2019-03-27 10:57:51, address_to=19/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India, notification_date_time=28-03-2019 17:24:09}
new JSONObject(remoteMessage.getData()) : 转换为 JSONObject 但 得到不需要的反斜杠和双引号
new JSONObject(remoteMessage.getData()) : {"content-available":"1","notification_type":"end_request","booking_id":"247","priority":"high","base_price":"35","totalMinutePrice":"1.5","alert":"End trip By driver","sound":"default","title":"End trip By driver","total_amount":"397","address_from":"A\/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India","service_cost":"360","servicesList":"[{\"total_cost\":15,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Doctors on call\",\"sub_cat_id\":\"1\",\"service_cost\":\"15.00\",\"service_cat_id\":\"1\"}],\"service_name\":\"Services1\",\"service_id\":\"1\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":95,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Hand\",\"sub_cat_id\":\"3\",\"service_cost\":\"20.00\",\"service_cat_id\":\"2\"},{\"cost\":0,\"sub_cat_name\":\"Body\",\"sub_cat_id\":\"4\",\"service_cost\":\"75.00\",\"service_cat_id\":\"2\"}],\"service_name\":\"Dressing\",\"service_id\":\"2\",\"is_multiple_choose\":\"1\",\"status\":\"true\"},{\"total_cost\":0,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"No\",\"sub_cat_id\":\"7\",\"service_cost\":\"0.00\",\"service_cat_id\":\"3\"}],\"service_name\":\"Do you need oxygen?\",\"service_id\":\"3\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":30,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Level 3\",\"sub_cat_id\":\"10\",\"service_cost\":\"30.00\",\"service_cat_id\":\"4\"}],\"service_name\":\"Lift\\/Stairs Accessibility\",\"service_id\":\"4\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":220,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Ventilator\",\"sub_cat_id\":\"12\",\"service_cost\":\"100.00\",\"service_cat_id\":\"5\"},{\"cost\":0,\"sub_cat_name\":\"Intracenous (IV) drip\",\"sub_cat_id\":\"13\",\"service_cost\":\"120.00\",\"service_cat_id\":\"5\"}],\"service_name\":\"Other Medical\",\"service_id\":\"5\",\"is_multiple_choose\":\"1\",\"status\":\"true\"},{}]","tripdatetime":"2019-03-27 10:57:51","address_to":"19\/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India","notification_date_time":"28-03-2019 17:24:09"}
最终 JSON :
Replace all back slash and invalid double quotes : {"content-available":"1","notification_type":"end_request","booking_id":"247","priority":"high","base_price":"35","totalMinutePrice":"1.5","alert":"End trip By driver","sound":"default","title":"End trip By driver","total_amount":"397","address_from":"A/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India","service_cost":"360","servicesList":[{"total_cost":15,"sub_category":[{"cost":0,"sub_cat_name":"Doctors on call","sub_cat_id":"1","service_cost":"15.00","service_cat_id":"1"}],"service_name":"Services1","service_id":"1","is_multiple_choose":"0","status":"true"},{"total_cost":95,"sub_category":[{"cost":0,"sub_cat_name":"Hand","sub_cat_id":"3","service_cost":"20.00","service_cat_id":"2"},{"cost":0,"sub_cat_name":"Body","sub_cat_id":"4","service_cost":"75.00","service_cat_id":"2"}],"service_name":"Dressing","service_id":"2","is_multiple_choose":"1","status":"true"},{"total_cost":0,"sub_category":[{"cost":0,"sub_cat_name":"No","sub_cat_id":"7","service_cost":"0.00","service_cat_id":"3"}],"service_name":"Do you need oxygen?","service_id":"3","is_multiple_choose":"0","status":"true"},{"total_cost":30,"sub_category":[{"cost":0,"sub_cat_name":"Level 3","sub_cat_id":"10","service_cost":"30.00","service_cat_id":"4"}],"service_name":"Lift/Stairs Accessibility","service_id":"4","is_multiple_choose":"0","status":"true"},{"total_cost":220,"sub_category":[{"cost":0,"sub_cat_name":"Ventilator","sub_cat_id":"12","service_cost":"100.00","service_cat_id":"5"},{"cost":0,"sub_cat_name":"Intracenous (IV) drip","sub_cat_id":"13","service_cost":"120.00","service_cat_id":"5"}],"service_name":"Other Medical","service_id":"5","is_multiple_choose":"1","status":"true"},{}],"tripdatetime":"2019-03-27 10:57:51","address_to":"19/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India","notification_date_time":"28-03-2019 17:24:09"}
完整代码:MyFirebaseMessagingService.java
希望对其他人有所帮助。
我正在从 FCM 通知中获取 JSON 格式的数据。它根据通知类型具有不同的格式,如下所示:
格式 1: accept_request:
{
"alert": "Accept Request By driver",
"title": "Accept Request By driver",
"booking_id": "247",
"notification_type": "accept_request"
}
格式二:end_request:
{
"alert": "End trip By driver",
"title": "End trip By driver",
"booking_id": "247",
"notification_type": "end_request",
"servicesList": [
{
"service_id": "1",
"service_name": "Services1",
"status": "true",
"sub_category": [
{
"sub_cat_id": "1",
"sub_cat_name": "Doctors on call",
"service_cost": "15.00",
"service_cat_id": "1",
"cost": 0
}
],
"is_multiple_choose": "0",
"total_cost": 15
}
}
我已经将 CommonNotificationBean.java
创建为 POJO class。我已成功解析 accept_request
.
它的工作原理是因为所有键都有字符串值并且 remoteMessage.getData()
还返回 Map<String, String>
类型值。
代码:
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData().get("notification_type"));
Map<String, String> params = remoteMessage.getData();
JSONObject object = new JSONObject(params);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(object.toString()));
reader.setLenient(true);
CommonNotificationBean bean = gson.fromJson(reader, CommonNotificationBean.class);
sendNotification(bean);
}
问题:
现在我在解析 end_request
数据时遇到了问题,因为它有嵌套的 JSON 数组。
仔细阅读:
我可以为动态数据做什么而不是 Map<String, String>
因为它不会将数据转换为 Map<String, String>
类型,因为它有一些 List
输入值。
有人可以帮忙吗?
很简单,您只需要一个具有属性 alert
、title
和 notification_type
的抽象 Notification 对象即可。然后,根据你可能的类型有具体的实现,到目前为止:
AcceptRequestNotification extends Notification
只有一个 intbooking_id
(这是你已经拥有的那个,你称之为 CommonNotificationBean 的那个)EndRequestNotification extends Notification
其中包含例如一个名为servicesList
的 ArrayList,此 ArrayList 应为Service
类型,然后服务将具有属性:service_id
,service_name
、status
、sub_category
这又是另一个自定义类型的 ArrayList。
然后您只需将代码更改为:
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData().get("notification_type"));
Map<String, String> params = remoteMessage.getData();
JSONObject object = new JSONObject(params);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(object.toString()));
reader.setLenient(true);
Class typeOf;
switch(remoteMessage.getData().get("notification_type")) {
case "accept_request":
typeOf = AcceptRequestNotification.class;
break;
case "end_request":
typeOf = EndRequestNotification.class;
break;
}
//you can cast this object later on (to the corresponding custom subclass of Notification), based on the notif.getNotificationType() value.
Notification notif = gson.fromJson(reader, typeOf);
sendNotification(notif);
}
最后我通过添加一些概念得到了解决方案。 :)
我在 JSON 中使用正确的格式进行转换时遇到了很多问题,例如:
- 字符处的未终止对象
- MalformedJsonException
最后,以下代码对我有用。
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "remoteMessage.getData() : " + remoteMessage.getData());
// Map<String, String> stringStringMap = remoteMessage.getData();
JSONObject object = new JSONObject(remoteMessage.getData());
Log.d(TAG, "new JSONObject(remoteMessage.getData()) : " + object.toString());
String finalJSON = object.toString().replaceAll("\\", "").replace("\"[", "[").replace("]\"", "]");
Log.d(TAG, "Replace all back slash and invalid double quotes : " + finalJSON);
CommonNotificationBean bean = new Gson().fromJson(finalJSON, CommonNotificationBean.class);
sendNotification(bean);
}
Logcat:
remoteMessage.getData(): 获取不带双引号的数据。
remoteMessage.getData() : {content-available=1, notification_type=end_request, booking_id=247, priority=high, base_price=35, totalMinutePrice=1.5, alert=End trip By driver, sound=default, title=End trip By driver, total_amount=397, address_from=A/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India, service_cost=360, servicesList=[{"total_cost":15,"sub_category":[{"cost":0,"sub_cat_name":"Doctors on call","sub_cat_id":"1","service_cost":"15.00","service_cat_id":"1"}],"service_name":"Services1","service_id":"1","is_multiple_choose":"0","status":"true"},{"total_cost":95,"sub_category":[{"cost":0,"sub_cat_name":"Hand","sub_cat_id":"3","service_cost":"20.00","service_cat_id":"2"},{"cost":0,"sub_cat_name":"Body","sub_cat_id":"4","service_cost":"75.00","service_cat_id":"2"}],"service_name":"Dressing","service_id":"2","is_multiple_choose":"1","status":"true"},{"total_cost":0,"sub_category":[{"cost":0,"sub_cat_name":"No","sub_cat_id":"7","service_cost":"0.00","service_cat_id":"3"}],"service_name":"Do you need oxygen?","service_id":"3","is_multiple_choose":"0","status":"true"},{"total_cost":30,"sub_category":[{"cost":0,"sub_cat_name":"Level 3","sub_cat_id":"10","service_cost":"30.00","service_cat_id":"4"}],"service_name":"Lift\/Stairs Accessibility","service_id":"4","is_multiple_choose":"0","status":"true"},{"total_cost":220,"sub_category":[{"cost":0,"sub_cat_name":"Ventilator","sub_cat_id":"12","service_cost":"100.00","service_cat_id":"5"},{"cost":0,"sub_cat_name":"Intracenous (IV) drip","sub_cat_id":"13","service_cost":"120.00","service_cat_id":"5"}],"service_name":"Other Medical","service_id":"5","is_multiple_choose":"1","status":"true"},{}], tripdatetime=2019-03-27 10:57:51, address_to=19/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India, notification_date_time=28-03-2019 17:24:09}
new JSONObject(remoteMessage.getData()) : 转换为 JSONObject 但 得到不需要的反斜杠和双引号
new JSONObject(remoteMessage.getData()) : {"content-available":"1","notification_type":"end_request","booking_id":"247","priority":"high","base_price":"35","totalMinutePrice":"1.5","alert":"End trip By driver","sound":"default","title":"End trip By driver","total_amount":"397","address_from":"A\/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India","service_cost":"360","servicesList":"[{\"total_cost\":15,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Doctors on call\",\"sub_cat_id\":\"1\",\"service_cost\":\"15.00\",\"service_cat_id\":\"1\"}],\"service_name\":\"Services1\",\"service_id\":\"1\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":95,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Hand\",\"sub_cat_id\":\"3\",\"service_cost\":\"20.00\",\"service_cat_id\":\"2\"},{\"cost\":0,\"sub_cat_name\":\"Body\",\"sub_cat_id\":\"4\",\"service_cost\":\"75.00\",\"service_cat_id\":\"2\"}],\"service_name\":\"Dressing\",\"service_id\":\"2\",\"is_multiple_choose\":\"1\",\"status\":\"true\"},{\"total_cost\":0,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"No\",\"sub_cat_id\":\"7\",\"service_cost\":\"0.00\",\"service_cat_id\":\"3\"}],\"service_name\":\"Do you need oxygen?\",\"service_id\":\"3\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":30,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Level 3\",\"sub_cat_id\":\"10\",\"service_cost\":\"30.00\",\"service_cat_id\":\"4\"}],\"service_name\":\"Lift\\/Stairs Accessibility\",\"service_id\":\"4\",\"is_multiple_choose\":\"0\",\"status\":\"true\"},{\"total_cost\":220,\"sub_category\":[{\"cost\":0,\"sub_cat_name\":\"Ventilator\",\"sub_cat_id\":\"12\",\"service_cost\":\"100.00\",\"service_cat_id\":\"5\"},{\"cost\":0,\"sub_cat_name\":\"Intracenous (IV) drip\",\"sub_cat_id\":\"13\",\"service_cost\":\"120.00\",\"service_cat_id\":\"5\"}],\"service_name\":\"Other Medical\",\"service_id\":\"5\",\"is_multiple_choose\":\"1\",\"status\":\"true\"},{}]","tripdatetime":"2019-03-27 10:57:51","address_to":"19\/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India","notification_date_time":"28-03-2019 17:24:09"}
最终 JSON :
Replace all back slash and invalid double quotes : {"content-available":"1","notification_type":"end_request","booking_id":"247","priority":"high","base_price":"35","totalMinutePrice":"1.5","alert":"End trip By driver","sound":"default","title":"End trip By driver","total_amount":"397","address_from":"A/ 4 forum bungalow Nr. Hicort, Sola, Ahmedabad, Gujarat 380015, India","service_cost":"360","servicesList":[{"total_cost":15,"sub_category":[{"cost":0,"sub_cat_name":"Doctors on call","sub_cat_id":"1","service_cost":"15.00","service_cat_id":"1"}],"service_name":"Services1","service_id":"1","is_multiple_choose":"0","status":"true"},{"total_cost":95,"sub_category":[{"cost":0,"sub_cat_name":"Hand","sub_cat_id":"3","service_cost":"20.00","service_cat_id":"2"},{"cost":0,"sub_cat_name":"Body","sub_cat_id":"4","service_cost":"75.00","service_cat_id":"2"}],"service_name":"Dressing","service_id":"2","is_multiple_choose":"1","status":"true"},{"total_cost":0,"sub_category":[{"cost":0,"sub_cat_name":"No","sub_cat_id":"7","service_cost":"0.00","service_cat_id":"3"}],"service_name":"Do you need oxygen?","service_id":"3","is_multiple_choose":"0","status":"true"},{"total_cost":30,"sub_category":[{"cost":0,"sub_cat_name":"Level 3","sub_cat_id":"10","service_cost":"30.00","service_cat_id":"4"}],"service_name":"Lift/Stairs Accessibility","service_id":"4","is_multiple_choose":"0","status":"true"},{"total_cost":220,"sub_category":[{"cost":0,"sub_cat_name":"Ventilator","sub_cat_id":"12","service_cost":"100.00","service_cat_id":"5"},{"cost":0,"sub_cat_name":"Intracenous (IV) drip","sub_cat_id":"13","service_cost":"120.00","service_cat_id":"5"}],"service_name":"Other Medical","service_id":"5","is_multiple_choose":"1","status":"true"},{}],"tripdatetime":"2019-03-27 10:57:51","address_to":"19/20, Chanakyapuri, Ahmedabad, Gujarat 382481, India","notification_date_time":"28-03-2019 17:24:09"}
完整代码:MyFirebaseMessagingService.java
希望对其他人有所帮助。