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android - 如何在 Kotlin 的可变映射中替换特定键的值

问题描述

我有来自 api 的响应，我想替换特定 KEY 的 VALUE。怎么做

MutableMap<String!, String!>

{sendbird_call={"user_id":"91990000000","push_sound":"default","is_voip":true,"push_alert":"","client_id":"xxxxx-xxx-xxxx-xxxx-xxxxxxx"," command":{"sequence_number":2,"payload":{"sdp":"sdpppppp","call_id":"xxxx-xxx-xxx-xxxx-xxxxxx", "peer_connection_id":null },"delivery_info": {"type":"push"},"message_id":"xxxx-xxxx-xxx-xx-xxxx","cmd":"SGNL","type":"offer","call_type":"direct_call", “版本”：1}，“接收者类型”：“客户端”}，消息=}

从上面的响应中，我需要将peer_connection_id的值从null更改为""

var msgData = JSONObject(receivedMap["sendbird_call"])
  if (msgData.has("command")) {
     val dataCommand: JSONObject = msgData.getJSONObject("command")
        if (dataCommand.has("payload")) {
           val dataPay: JSONObject = dataCommand.getJSONObject("payload")
              if (dataPay.has("peer_connection_id")) {
                 if(dataPay.getString("peer_connection_id").equals(null)){
                    dataPay.put("peer_connection_id","")
                 }
              }
        }
  }

任何建议或帮助

IR42的回答

 private fun replacePeerID(receivedMap: Map<String, String>): Map<String, String> {

    var msgData = JSONObject(receivedMap["sendbird_call"])

    msgData.optJSONObject("command")
        ?.optJSONObject("payload")
        ?.let {
            if (it.has("peer_connection_id") && it.opt("peer_connection_id") == null) {
                it.put("peer_connection_id", "")
            }
        }

    return receivedMap
}

标签： androidkotlinmutable

解决方案

private fun replacePeerID(receivedMap: Map<String, String>): Map<String, String> {
    val msgData = JSONObject(receivedMap["sendbird_call"] ?: "{}")
    return msgData.optJSONObject("command")
        ?.optJSONObject("payload")
        .let { payloadObject ->
            if (payloadObject != null &&
                payloadObject.has("peer_connection_id") &&
                payloadObject.opt("peer_connection_id") == JSONObject.NULL
            ) {
                payloadObject.put("peer_connection_id", "")
                receivedMap + ("sendbird_call" to msgData.toString())
            } else {
                receivedMap
            }
        }
}

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