Introduction
In this lesson, we will learn how to send photos located in a local directory.
If you didn't open the , don't forget to make a Bot class with a token and name of the bot, as well as connect libraries.
Process
The main function remains unchanged, so just copy it in
Let's look at the HandlerToLessonThree class.
We still need to Override onUpdateReceived method
Let's do a simple processing of the received messages
When writing "want picture", the user will receive a photo
public class HandleToLessonThree extends TelegramLongPollingBot {
@Override
public void onUpdateReceived(Update update) {
if (update.hasMessage() && update.getMessage().hasText()) {
// Initialization received message
String message_text = update.getMessage().getText();
// Initialization sendMessage
SendMessage message = new SendMessage();
// In advance set chat id to sendMessage
message.setChatId(update.getMessage().getChatId().toString());
switch (message_text) {
case "/start" -> message.setText("All is working");
case "want picture" -> {
try {
sendPhoto(update, "test.png");
} catch (TelegramApiException | FileNotFoundException e) {
e.printStackTrace();
}
message.setText("Photo is sent");
}
}
}
}
}
It remains only to write the method of sending the photo itself
public class HandleToLessonThree extends TelegramLongPollingBot {
// Previous methods
public void sendPhoto(Update update, String imagePath) throws TelegramApiException, FileNotFoundException {
// Initialization sendPhoto
SendPhoto sendPhoto = new SendPhoto();
File file;
// Initialization file
file = ResourceUtils.getFile(String.valueOf(new File(imagePath)));
// In advance set chat id to sendPhoto
sendPhoto.setChatId(update.getMessage().getChatId().toString());
// Set file to sendPhoto
sendPhoto.setPhoto(new InputFile(file));
// Send photo
execute(sendPhoto);
}
}
As a result, we get a bot that, when entering a command, sends photos from the local directory
