I'm making an application that should receive Gmail user emails using the Gmail API. However, I must receive the data of each email as: content, sender, subject and date of receipt, but I can not do it.
Here is the snippet I took from Google where I can only get the ID and Thread ID of each email:
public class GmailApiQuickstart {
// Check https://developers.google.com/gmail/api/auth/scopes for all available scopes
private static final String SCOPE = "https://www.googleapis.com/auth/gmail.readonly";
private static final String APP_NAME = "GmailApiQuickstart";
private static final String USER = "me";
// Path to the client_secret.json file downloaded from the Developer Console
private static final String CLIENT_SECRET_PATH = "c:/client_secret.json";
private static GoogleClientSecrets clientSecrets;
public void buscar() throws IOException {
HttpTransport httpTransport = new NetHttpTransport();
JsonFactory jsonFactory = new JacksonFactory();
clientSecrets = GoogleClientSecrets.load(jsonFactory, new FileReader(CLIENT_SECRET_PATH));
// Allow user to authorize via url.
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport, jsonFactory, clientSecrets, Arrays.asList(SCOPE))
.setAccessType("online")
.setApprovalPrompt("auto").build();
String url = flow.newAuthorizationUrl().setRedirectUri(GoogleOAuthConstants.OOB_REDIRECT_URI)
.build();
System.out.println("Please open the following URL in your browser then type"
+ " the authorization code:\n" + url);
// Read code entered by user.
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String code = br.readLine();
// Generate Credential using retrieved code.
GoogleTokenResponse responseT = flow.newTokenRequest(code)
.setRedirectUri(GoogleOAuthConstants.OOB_REDIRECT_URI).execute();
GoogleCredential credential = new GoogleCredential()
.setFromTokenResponse(responseT);
// Create a new authorized Gmail API client
Gmail service = new Gmail.Builder(httpTransport, jsonFactory, credential)
.setApplicationName(APP_NAME).build();
ListMessagesResponse response = service.users().messages().list(USER).setQ("vagas").execute();
List<Message> messages = new ArrayList<Message>();
while (response.getMessages() != null) {
messages.addAll(response.getMessages());
if (response.getNextPageToken() != null) {
String pageToken = response.getNextPageToken();
response = service.users().messages().list(USER).setQ("vagas")
.setPageToken(pageToken).execute();
} else {
break;
}
}
for (Message message : messages) {
//Essa é a parte onde pega o ID e Thread ID
//qual(ais) parâmetro(s) devo adicionar para pegar o que preciso???
System.out.println(message.toPrettyString());
}
}
}