sendPhoto

Introduction

In this lesson, we will learn how to send photos located in a local directory.

If you didn't open the Lesson 1, 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 previous lessons

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);
    }
}

You can find all the code here

As a result, we get a bot that, when entering a command, sends photos from the local directory

Show Work

Back to Lesson 2 of getting Keyboard Markup Go to Lesson 4 of sending music from local directory