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社区首页 >问答首页 >包含对象或json字符串的Gson自定义反序列化程序

问包含对象或json字符串的Gson自定义反序列化程序
EN

Stack Overflow用户
提问于 2019-08-22 17:00:08
回答 1查看 82关注 0票数 0
关联问题
换一批

如何为同一对象编写自定义的反序列化程序？或者创建两个对象(一个包含原始json字符串，另一个包含- Object)？

我正在从服务器获取“所有设备列表”，并从服务器获取“更新设备列表”。问题是当我得到“所有设备列表”时，我得到的是“传感器”，“服务”，“尾巴”作为对象，但当我得到“更新的设备列表”时，这些字段是以字符串(json字符串)的形式出现的。我将添加照片来澄清问题。

所有设备响应：

All devices

更新的设备响应：

updated devices

All devices model

updated devices model

Json中我获取对象的位置

代码语言：javascript
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/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* [{"id":"68","title":"testRecall","items":[{"id":992,"alarm":0,"name":"CloudMM","online":"offline","time":"2018-10-28 23:30:58","timestamp":1540806358,"acktimestamp":1540806358,"lat":0,"lng":0,"course":0,"speed":0,"altitude":0,"icon_type":"icon","icon_color":"red","icon_colors":{"moving":"green","stopped":"red","offline":"red","engine":"yellow"},"icon":{"id":10,"user_id":null,"type":"icon","order":3,"width":46,"height":64,"path":"images\/device_icons\/v2\/objects2a_38.png","by_status":"0"},"power":"-","address":"-","protocol":"osmand","driver":"-","driver_data":{"id":null,"user_id":null,"device_id":null,"name":null,"rfid":null,"phone":null,"email":null,"description":null,"created_at":null,"updated_at":null},"sensors":[],"services":[],"tail":[],"distance_unit_hour":"kph","unit_of_distance":"km","unit_of_altitude":"mt","unit_of_capacity":"lt","stop_duration":"0h","moved_timestamp":0,"engine_status":null,"detect_engine":"gps","engine_hours":"gps","total_distance":0,"device_data":{"id":992,"user_id":70,"current_driver_id":null,"timezone_id":null,"traccar_device_id":992,"icon_id":10,"icon_colors":{"moving":"green","stopped":"red","offline":"red","engine":"yellow"},"active":1,"deleted":0,"name":"CloudMM","imei":"665544332211","fuel_measurement_id":1,"fuel_quantity":"0.00","fuel_price":"0.00","fuel_per_km":"0.00","sim_number":"","device_model":"","plate_number":"","vin":"","registration_number":"","object_owner":"","additional_notes":"","expiration_date":null,"sim_expiration_date":"0000-00-00","sim_activation_date":"0000-00-00","installation_date":"0000-00-00","tail_color":"#33cc33","tail_length":5,"engine_hours":"gps","detect_engine":"gps","min_moving_speed":6,"min_fuel_fillings":10,"min_fuel_thefts":10,"snap_to_road":0,"gprs_templates_only":0,"valid_by_avg_speed":"1","parameters":"[\"batterylevel\",\"satellites\",\"hdop\",\"sequence\",\"distance\",\"totaldistance\",\"motion\",\"valid\",\"enginehours\"]","currents":null,"created_at":"2018-10-29 05:34:27","updated_at":"2019-02-27 07:58:31","forward":{"active":"1","ip":"198.121.31.32","port":"6000","protocol":"TCP"},"stop_duration":"0h","pivot":{"user_id":70,"device_id":992,"group_id":68,"current_driver_id":null,"active":1,"timezone_id":null},"traccar":{"id":"992","name":"CloudMM","uniqueId":"665544332211","latestPosition_id":"1","lastValidLatitude":null,"lastValidLongitude":null,"other":"<info><batterylevel>23<\/batterylevel><satellites>0<\/satellites><hdop>0<\/hdop><sequence>6<\/sequence><distance>0<\/distance><totaldistance>0<\/totaldistance><motion>false<\/motion><valid>false<\/valid><enginehours>0<\/enginehours><\/info>","speed":"0.00","time":"2018-10-29 09:45:45","device_time":"2018-10-29 09:45:45","server_time":"2018-10-29 09:45:58","ack_time":"2018-10-29 09:45:58","altitude":null,"course":null,"power":null,"address":null,"protocol":"osmand","latest_positions":null,"moved_at":null},"icon":{"id":10,"user_id":null,"type":"icon","order":3,"width":46,"height":64,"path":"images\/device_icons\/v2\/objects2a_38.png","by_status":"0"},"sensors":[],"services":[],"driver":null,"users":[{"id":70,"email":"tomas@gpswox.com"}],"lastValidLatitude":0,"lastValidLongitude":0,"latest_positions":null,"icon_type":"icon","group_id":68,"user_timezone_id":null,"time":"2018-10-29 09:45:45","course":0,"speed":0}},{"id":1099,"alarm":0,"name":"testRecalObject","online":"offline","time":"Not connected","timestamp":0,"acktimestamp":0,"lat":0,"lng":0,"course":0,"speed":0,"altitude":0,"icon_type":"arrow","icon_color":"red","icon_colors":{"moving":"green","stopped":"yellow","offline":"red","engine":"yellow"},"icon":{"id":0,"user_id":null,"type":"arrow","order":1,"width":25,"height":33,"path":"assets\/images\/arrow-ack.png","by_status":"0"},"power":"-","address":"-","protocol":"-","driver":"-","driver_data":{"id":null,"user_id":null,"device_id":null,"name":null,"rfid":null,"phone":null,"email":null,"description":null,"created_at":null,"updated_at":null},"sensors":[],"services":[],"tail":[],"distance_unit_hour":"kph","unit_of_distance":"km","unit_of_altitude":"mt","unit_of_capacity":"lt","stop_duration":"0h","moved_timestamp":0,"engine_status":null,"detect_engine":"gps","engine_hours":"gps","total_distance":0,"device_data":{"id":1099,"user_id":70,"current_driver_id":null,"timezone_id":null,"traccar_device_id":1099,"icon_id":0,"icon_colors":{"moving":"green","stopped":"yellow","offline":"red","engine":"yellow"},"active":1,"deleted":0,"name":"testRecalObject","imei":"oooopaaa","fuel_measurement_id":1,"fuel_quantity":"0.00","fuel_price":"0.00","fuel_per_km":"0.00","sim_number":"","device_model":"","plate_number":"","vin":"","registration_number":"","object_owner":"","additional_notes":"","expiration_date":null,"sim_expiration_date":"0000-00-00","sim_activation_date":"0000-00-00","installation_date":"0000-00-00","tail_color":"#63f542","tail_length":0,"engine_hours":"gps","detect_engine":"gps","min_moving_speed":1,"min_fuel_fillings":1,"min_fuel_thefts":1,"snap_to_road":0,"gprs_templates_only":0,"valid_by_avg_speed":"1","parameters":null,"currents":null,"created_at":"2019-07-20 21:46:11","updated_at":"2019-07-20 21:46:11","forward":null,"stop_duration":"0h","pivot":{"user_id":70,"device_id":1099,"group_id":68,"current_driver_id":null,"active":1,"timezone_id":null},"traccar":{"id":"1099","name":"testRecalObject","uniqueId":"oooopaaa","latestPosition_id":null,"lastValidLatitude":null,"lastValidLongitude":null,"other":null,"speed":null,"time":null,"device_time":null,"server_time":null,"ack_time":null,"altitude":null,"course":null,"power":null,"address":null,"protocol":null,"latest_positions":null,"moved_at":null},"icon":{"id":0,"user_id":null,"type":"arrow","order":1,"width":25,"height":33,"path":"assets\/images\/arrow-ack.png","by_status":"0"},"sensors":[],"services":[],"driver":null,"users":[{"id":70,"email":"tomas@gpswox.com"}],"lastValidLatitude":0,"lastValidLongitude":0,"latest_positions":null,"icon_type":"arrow","group_id":68,"user_timezone_id":null,"time":null,"course":0,"speed":0}}]}]
*/

以及我从哪里得到的字符串

代码语言：javascript
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/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* {"items":[{"id":124,"alarm":0,"name":"Demo 1","online":"ack","time":"2019-08-22 03:26:02","timestamp":1566481263,"acktimestamp":0,"lat":55.675715,"lng":12.576404,"course":37,"speed":0,"altitude":1,"icon_type":"icon","icon_color":"yellow","icon_colors":{"moving":"green","stopped":"yellow","offline":"red","engine":"yellow"},"icon":{"id":3,"user_id":null,"type":"icon","order":3,"width":46,"height":64,"path":"images/device_icons/v2/objects2a_63_ack.png","by_status":"1"},"power":"-","address":"-","protocol":"homtecs","driver":"Testing","driver_data":{"id":"3","user_id":"1","device_id":"128","device_port":null,"name":"Testing","rfid":"ABC451132","phone":"4","email":"","description":"","created_at":"2017-06-20 19:00:43","updated_at":"2018-10-22 14:38:51"},"sensors":"[{\"id\":\"299\",\"type\":\"satellites\",\"name\":\"Satellites\",\"show_in_popup\":\"0\",\"value\":\"8\",\"val\":\"8\",\"scale_value\":null},{\"id\":\"300\",\"type\":\"satellites\",\"name\":\"Accuracy\",\"show_in_popup\":\"0\",\"value\":\"1.02\",\"val\":\"1.02\",\"scale_value\":null}]","services":"[{\"id\":\"9\",\"name\":\"Service one\",\"value\":\"Days Left (28d.)\",\"expiring\":false},{\"id\":\"19\",\"name\":\"Ignas\",\"value\":\"\\\"Sensor\\\" was not found.\",\"expiring\":true},{\"id\":\"20\",\"name\":\"Ignas w\",\"value\":\"Days Left (1560d.)\",\"expiring\":false},{\"id\":\"21\",\"name\":\"Poiu\",\"value\":\"\\\"Sensor\\\" was not found.\",\"expiring\":true}]","tail":"[{\"lat\":\"55.675024666667\",\"lng\":\"12.5744815\"},{\"lat\":\"55.675158166667\",\"lng\":\"12.574806833333\"},{\"lat\":\"55.675362333333\",\"lng\":\"12.575193666667\"},{\"lat\":\"55.675581666667\",\"lng\":\"12.575788833333\"},{\"lat\":\"55.675698666667\",\"lng\":\"12.5761065\"}]","distance_unit_hour":"kph","unit_of_distance":"km","unit_of_altitude":"mt","unit_of_capacity":"lt","stop_duration":"1min 42s","moved_timestamp":1566481160,"engine_status":null,"detect_engine":"gps","engine_hours":"gps","total_distance":7088342.97,"device_data":{"id":124,"user_id":70,"current_driver_id":3,"timezone_id":null,"traccar_device_id":124,"icon_id":3,"icon_colors":{"moving":"green","stopped":"yellow","offline":"red","engine":"yellow"},"active":1,"deleted":0,"name":"Demo 1","imei":"100000001","fuel_measurement_id":1,"fuel_quantity":"0.00","fuel_price":"0.00","fuel_per_km":"0.00","sim_number":"","device_model":"","plate_number":"","vin":"","registration_number":"","object_owner":"","additional_notes":"","expiration_date":null,"sim_expiration_date":"0000-00-00","sim_activation_date":"0000-00-00","installation_date":"0000-00-00","tail_color":"#33cc33","tail_length":5,"engine_hours":"gps","detect_engine":"gps","min_moving_speed":6,"min_fuel_fillings":10,"min_fuel_thefts":10,"snap_to_road":0,"gprs_templates_only":0,"valid_by_avg_speed":"1","parameters":"[\"sat\",\"hdop\",\"valid\",\"enginehours\",\"rfid\"]","currents":{"geofences":[]},"created_at":"2017-07-04 08:13:53","updated_at":"2018-12-20 08:10:59","forward":null,"stop_duration":"1min 42s","pivot":{"user_id":70,"device_id":124,"group_id":71,"current_driver_id":3,"active":1,"timezone_id":null},"traccar":{"id":"124","name":"Demo 1","uniqueId":"100000001","latestPosition_id":"9275412","lastValidLatitude":"55.675714833333","lastValidLongitude":"12.576404333333","other":"<info><sat>8</sat><hdop>1.02</hdop><valid>true</valid><enginehours>8862443</enginehours><distance>0.46</distance><totaldistance>7088342.97</totaldistance></info>","speed":"0.06","time":"2019-08-22 13:41:02","device_time":"2019-08-22 13:41:02","server_time":"2019-08-22 13:41:03","ack_time":null,"altitude":"1.4","course":"36.8","power":null,"address":null,"protocol":"homtecs","latest_positions":"55.675698666667/12.5761065;55.675581666667/12.575788833333;55.675362333333/12.575193666667;55.675158166667/12.574806833333;55.675024666667/12.5744815;55.6749245/12.574212666667;55.674809333333/12.5739365;55.674687833333/12.5736325;55.674487333333/12.5731665;55.674489666667/12.572678;55.67469/12.5724915;55.6748885/12.572210333333;55.675289/12.571647333333;55.675530666667/12.5713325;55.6757135/12.571215666667","moved_at":"2019-08-22 13:39:20"},"icon":{"id":3,"user_id":null,"type":"icon","order":3,"width":46,"height":64,"path":"images/device_icons/v2/objects2a_63_online.png","by_status":"1"},"sensors":[{"id":"299","user_id":"1","device_id":"124","name":"Satellites","type":"satellites","tag_name":"sat","add_to_history":"0","on_value":null,"off_value":null,"shown_value_by":null,"fuel_tank_name":null,"full_tank":null,"full_tank_value":null,"min_value":null,"max_value":null,"formula":null,"odometer_value_by":null,"odometer_value":null,"odometer_value_unit":"km","temperature_max":null,"temperature_max_value":null,"temperature_min":null,"temperature_min_value":null,"value":"10","value_formula":"0","show_in_popup":"0","unit_of_measurement":"","on_tag_value":null,"off_tag_value":null,"on_type":null,"off_type":null,"calibrations":null,"skip_calibration":null},{"id":"300","user_id":"1","device_id":"124","name":"Accuracy","type":"satellites","tag_name":"hdop","add_to_history":"0","on_value":null,"off_value":null,"shown_value_by":null,"fuel_tank_name":null,"full_tank":null,"full_tank_value":null,"min_value":null,"max_value":null,"formula":null,"odometer_value_by":null,"odometer_value":null,"odometer_value_unit":"km","temperature_max":null,"temperature_max_value":null,"temperature_min":null,"temperature_min_value":null,"value":"0.87","value_formula":"0","show_in_popup":"0","unit_of_measurement":"","on_tag_value":null,"off_tag_value":null,"on_type":null,"off_type":null,"calibrations":null,"skip_calibration":null}],"services":[{"id":"9","user_id":"1","device_id":"124","name":"Service one","expiration_by":"days","interval":"30","last_service":"2019-08-20","trigger_event_left":"5","renew_after_expiration":"1","expires":"0","expires_date":"2019-09-19","remind":"0","remind_date":"2019-09-14","event_sent":"0","expired":"0","email":"","mobile_phone":""},{"id":"19","user_id":"1","device_id":"124","name":"Ignas","expiration_by":"odometer","interval":"123456","last_service":"0","trigger_event_left":"0","renew_after_expiration":"0","expires":"123456","expires_date":null,"remind":"123456","remind_date":null,"event_sent":"0","expired":"0","email":"","mobile_phone":""},{"id":"20","user_id":"1","device_id":"124","name":"Ignas w","expiration_by":"days","interval":"2000","last_service":null,"trigger_event_left":"0","renew_after_expiration":"0","expires":"0","expires_date":"2023-11-29","remind":"0","remind_date":"1970-01-01","event_sent":"1","expired":"0","email":"","mobile_phone":""},{"id":"21","user_id":"1","device_id":"124","name":"Poiu","expiration_by":"odometer","interval":"12","last_service":"0","trigger_event_left":"0","renew_after_expiration":"0","expires":"12","expires_date":null,"remind":"12","remind_date":null,"event_sent":"0","expired":"0","email":"","mobile_phone":""}],"driver":{"id":"3","user_id":"1","device_id":"128","device_port":null,"name":"Testing","rfid":"ABC451132","phone":"4","email":"","description":"","created_at":"2017-06-20 19:00:43","updated_at":"2018-10-22 14:38:51"},"lastValidLatitude":55.675715,"lastValidLongitude":12.576404,"latest_positions":"55.675698666667/12.5761065;55.675581666667/12.575788833333;55.675362333333/12.575193666667;55.675158166667/12.574806833333;55.675024666667/12.5744815;55.6749245/12.574212666667;55.674809333333/12.5739365;55.674687833333/12.5736325;55.674487333333/12.5731665;55.674489666667/12.572678;55.67469/12.5724915;55.6748885/12.572210333333;55.675289/12.571647333333;55.675530666667/12.5713325;55.6757135/12.571215666667","icon_type":"icon","group_id":71,"user_timezone_id":null,"time":"2019-08-22 13:41:02","course":37,"speed":0}}],"events":[],"time":1566481263,"version":"3.4.3.1"}
*/
android
kotlin
gson
retrofit
EN

回答 1

Stack Overflow用户

发布于 2019-08-22 19:04:08

这只是一个概念验证，但我想你会明白的。

代码语言：javascript
运行
AI代码解释
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import com.google.gson.*
import com.google.gson.reflect.TypeToken
import java.lang.reflect.Type

data class Test(val sensors: List<Sensor>)

data class Sensor(val id: Int, val name: String)

class TestDeserializer : JsonDeserializer<Test> {
    override fun deserialize(json: JsonElement, typeOfT: Type?, context: JsonDeserializationContext): Test {
        val jsonObject = json.asJsonObject
        val sensorsJson = jsonObject["sensors"]
        val sensors = if (sensorsJson.isJsonArray) {
            sensorsJson.asJsonArray.map { context.deserialize<Sensor>(it, Sensor::class.java) }
        } else {
            val typeToken = TypeToken.getParameterized(List::class.java, Sensor::class.java)
            val sensorsElement = JsonParser().parse(sensorsJson.asString)
            context.deserialize(sensorsElement, typeToken.type)
        }
        return Test(sensors)
    }
}

fun main() {
    val gson = GsonBuilder()
        .registerTypeAdapter(Test::class.java, TestDeserializer())
        .create()

    val jsonWithObjects = """
{
  "sensors": [
    {
      "id": 1,
      "name": "test 1"
    },
    {
      "id": 2,
      "name": "test 2"
    },
    {
      "id": 3,
      "name": "test 3"
    }
  ]
}
    """.trimIndent()

    val test1 = gson.fromJson(jsonWithObjects, Test::class.java)

    val jsonWithStrings = """
{
  "sensors": "[{\"id\": 1,\"name\": \"test 1\"},{\"id\": 2,\"name\": \"test 2\"},{\"id\": 3,\"name\": \"test 3\"}]"
}
    """.trimIndent()

    val test2 = gson.fromJson(jsonWithStrings, Test::class.java)
    println(test1 == test2) // prints true
}
票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/57614023

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