Java

Get a List of Message IDs in GMail User's Mailbox

See more GMail REST API Examples

Demonstrates how to get a list of message IDs in a GMail mailbox. The "userId" can be either the user's email address or the special value "me" to indicate the authenticated user. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpResponse;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();

        http.setAuthToken("ACCESS_TOKEN");

        http.setAccept("application/json");

        HttpResponse resp = new HttpResponse();
        try {
            http.httpNoBody("GET", "https://www.googleapis.com/gmail/v1/users/userId/messages", resp);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Response Status Code: " + resp.getStatusCode());

        JsonObject jsonResponse = new JsonObject();
        jsonResponse.load(resp.getBodyStr());
        jsonResponse.setEmitCompact(false);
        System.out.println(jsonResponse.emit());

        if (resp.getStatusCode() != 200) {
            System.out.println("Failed.");
            return;
        }

        // {
        //   "messages": [
        //     users.messages Resource
        //   ],
        //   "nextPageToken": string,
        //   "resultSizeEstimate": unsigned integer
        // }

        String id = "";
        String threadId = "";

        int resultSizeEstimate = jsonResponse.intOf("resultSizeEstimate");
        int i = 0;
        int count_i = jsonResponse.sizeOfArray("messages");
        while (i < count_i) {
            jsonResponse.setI(i);
            id = jsonResponse.stringOf("messages[i].id");
            threadId = jsonResponse.stringOf("messages[i].threadId");
            i = i + 1;
        }
    }
}