MesageID Android Gmail Api

如何在Android中使用Gmail Api获取阅读特定邮件的

messageID

Gmail Api的

users.messages.get

方法需要两个参数：

将作为用户名的

userId

messageID

---

那么，如何获取

messageID

以及

messageID

究竟是什么呢？

要获取

messageID

，首先需要使用一些可选参数。这将返回

messageid

，它们只是表示消息的唯一字符串

常规http请求的示例如下：

从我自己发送的带有收件箱标签的邮件中只给我一个

messageId

userId = me
labelIds = INBOX
maxResults = 1
q = from:me

GET https://www.googleapis.com/gmail/v1/users/me/messages?labelIds=INBOX&maxResults=1&q=from%3Ame

响应：

{
 "messages": [
  {
   "id": "14f8d57248451a6c", // This is the messageId!
   "threadId": "14f8d57248451a6c"
  }
 ],
 "nextPageToken": "04016634599566360443",
 "resultSizeEstimate": 2
}

{
 "id": "14f8d57248451a6c",
 "threadId": "14f8d57248451a6c",
 "labelIds": [
  "SENT",
  "INBOX",
  "IMPORTANT"
 ],
 "snippet": "",
 "historyId": "563949",
 "internalDate": "1441185342000",
 "payload": {
  "mimeType": "multipart/mixed",
  "filename": "",
  "headers": [
   {
    "name": "MIME-Version",
    "value": "1.0"
   },
   {
    "name": "Received",
    "value": "by 10.28.99.138 with HTTP; Wed, 2 Sep 2015 02:15:42 -0700 (PDT)"
   },
   {
    "name": "Date",
    "value": "Wed, 2 Sep 2015 11:15:42 +0200"
   }, ...

然后，我在get方法中使用此messageId来获取实际内容：

GET https://www.googleapis.com/gmail/v1/users/me/messages/14f8d57248451a6c

响应：

{
 "messages": [
  {
   "id": "14f8d57248451a6c", // This is the messageId!
   "threadId": "14f8d57248451a6c"
  }
 ],
 "nextPageToken": "04016634599566360443",
 "resultSizeEstimate": 2
}

{
 "id": "14f8d57248451a6c",
 "threadId": "14f8d57248451a6c",
 "labelIds": [
  "SENT",
  "INBOX",
  "IMPORTANT"
 ],
 "snippet": "",
 "historyId": "563949",
 "internalDate": "1441185342000",
 "payload": {
  "mimeType": "multipart/mixed",
  "filename": "",
  "headers": [
   {
    "name": "MIME-Version",
    "value": "1.0"
   },
   {
    "name": "Received",
    "value": "by 10.28.99.138 with HTTP; Wed, 2 Sep 2015 02:15:42 -0700 (PDT)"
   },
   {
    "name": "Date",
    "value": "Wed, 2 Sep 2015 11:15:42 +0200"
   }, ...

---

如果您想使用一个好的库而不是自己处理请求，则可以从中获得很大帮助。

您可以列出所有消息，并从中获得MessageID

public List<Message> listAllMessages(Gmail service, String userId
) throws IOException {

    ListMessagesResponse response = service.users().messages().list(userId).execute();
    if (response == null || response.isEmpty())
        return null;

    List<Message> messages = new ArrayList<Message>();
    messages.addAll(response.getMessages());

    int totalMsgs = messages.size();
    Message message;
    if (totalMsgs > 0) {
        for (int i = 0; i < totalMsgs; i++) { 
            message = messages.get(i); //message.getId() is what you want
        }
    }
    return messages;
}

public List listalmessages（Gmail服务，字符串userId
)抛出IOException{
ListMessagesResponse response=service.users（）.messages（）.list（userId.execute（）；
if（response==null | | response.isEmpty（））
返回null；
列表消息=新建ArrayList（）；
messages.addAll（response.getMessages（））；
int totalMsgs=messages.size（）；
信息；
如果（总MSGS>0）{
对于（inti=0；i

user.messages.list:）