Lesson 6. Inline keyboards and editing message's text

I published poll in our Telegram chat about next lesson. So, as you are reading this, Bots API 2.0 won.

Our chat

On April 9, 2016, Telegram released Bot API 2.0 which allows you to edit message's text and send new Inline Keyboards. So, let's implement it to your bot and see how its beautiful. Now as always open IntelliJ Idea, within src folder create files Main.java and BotApi20.java. First look:

src/BotApi20.java

import org.telegram.telegrambots.api.methods.send.SendMessage;
import org.telegram.telegrambots.api.objects.Update;
import org.telegram.telegrambots.bots.TelegramLongPollingBot;
import org.telegram.telegrambots.exceptions.TelegramApiException;

public class BotApi20 extends TelegramLongPollingBot {
    @Override
    public void onUpdateReceived(Update update) {

        // We check if the update has a message and the message has text
        if (update.hasMessage() && update.getMessage().hasText()) {
            if (update.getMessage().getText().equals("/start")) {
                // Set variables
                String message_text = update.getMessage().getText();
                long chat_id = update.getMessage().getChatId();

                SendMessage message = new SendMessage() // Create a message object object
                        .setChatId(chat_id)
                        .setText(message_text);
                try {
                    execute(message); // Sending our message object to user
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            } else {

            }

        }
    }

    @Override
    public String getBotUsername() {
        // Return bot username
        // If bot username is @MyAmazingBot, it must return 'MyAmazingBot'
        return "BotApi20Bot";
    }

    @Override
    public String getBotToken() {
        // Return bot token from BotFather
        return "12345:qwertyuiopASDGFHKMK";
    }
}

src/Main.java

import org.telegram.telegrambots.ApiContextInitializer;
import org.telegram.telegrambots.TelegramBotsApi;
import org.telegram.telegrambots.exceptions.TelegramApiException;

public class Main {
    public static void main(String[] args) {
        // Initialize Api Context
        ApiContextInitializer.init();

        // Instantiate Telegram Bots API
        TelegramBotsApi botsApi = new TelegramBotsApi();

        // Register our bot
        try {
            botsApi.registerBot(new BotApi20());
        } catch (TelegramApiException e) {
            e.printStackTrace();
        }
    }
}

I recommend you always look in the Bot API description so you know every method and type. Okey, lets make bot answer to the /start command:

public void onUpdateReceived(Update update) {

        // We check if the update has a message and the message has text
        if (update.hasMessage() && update.getMessage().hasText()) {
            String message_text = update.getMessage().getText();
            long chat_id = update.getMessage().getChatId();
            if (update.getMessage().getText().equals("/start")) {


                SendMessage message = new SendMessage() // Create a message object object
                        .setChatId(chat_id)
                        .setText("You send /start");
                try {
                    execute(message); // Sending our message object to user
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            } else {

            }

        } else if (update.hasCallbackQuery()) {}
    }

And now lets add Inline Keyboard to this message:

public void onUpdateReceived(Update update) {

        // We check if the update has a message and the message has text
        if (update.hasMessage() && update.getMessage().hasText()) {
            String message_text = update.getMessage().getText();
            long chat_id = update.getMessage().getChatId();
            if (update.getMessage().getText().equals("/start")) {


                SendMessage message = new SendMessage() // Create a message object object
                        .setChatId(chat_id)
                        .setText("You send /start");
                InlineKeyboardMarkup markupInline = new InlineKeyboardMarkup();
                List<List<InlineKeyboardButton>> rowsInline = new ArrayList<>();
                List<InlineKeyboardButton> rowInline = new ArrayList<>();
                rowInline.add(new InlineKeyboardButton().setText("Update message text").setCallbackData("update_msg_text"));
                // Set the keyboard to the markup
                rowsInline.add(rowInline);
                // Add it to the message
                markupInline.setKeyboard(rowsInline);
                message.setReplyMarkup(markupInline);
                try {
                    execute(message); // Sending our message object to user
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            } else {

            }

        } else if (update.hasCallbackQuery()) {}
    }

It looks like this now:

Inline Keyboard

We want to edit message text right? Let's do it when user press our button. Add a Callback Query handler to your bot:

else if (update.hasCallbackQuery()) {}

So if update has Callback query, it call this else if operator. Moving forward:

else if (update.hasCallbackQuery()) {
            // Set variables
            String call_data = update.getCallbackQuery().getData();
            long message_id = update.getCallbackQuery().getMessage().getMessageId();
            long chat_id = update.getCallbackQuery().getMessage().getChatId();

            if (call_data.equals("update_msg_text")) {
                String answer = "Updated message text";
                EditMessageText new_message = new EditMessageText()
                        .setChatId(chat_id)
                        .setMessageId(toIntExact(message_id))
                        .setText(answer);
                try {
                    execute(new_message); 
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            }
        }

Now when user press our button it will change it's text:

editMessageText

Source:

src/Main.java

import org.telegram.telegrambots.ApiContextInitializer;
import org.telegram.telegrambots.TelegramBotsApi;
import org.telegram.telegrambots.exceptions.TelegramApiException;

public class Main {
    public static void main(String[] args) {
        // Initialize Api Context
        ApiContextInitializer.init();

        // Instantiate Telegram Bots API
        TelegramBotsApi botsApi = new TelegramBotsApi();

        // Register our bot
        try {
            botsApi.registerBot(new BotApi20());
        } catch (TelegramApiException e) {
            e.printStackTrace();
        }
    }
}

src/BotApi20.java

import org.telegram.telegrambots.api.methods.send.SendMessage;
import org.telegram.telegrambots.api.methods.updatingmessages.EditMessageText;
import org.telegram.telegrambots.api.objects.Update;
import org.telegram.telegrambots.api.objects.replykeyboard.InlineKeyboardMarkup;
import org.telegram.telegrambots.api.objects.replykeyboard.buttons.InlineKeyboardButton;
import org.telegram.telegrambots.bots.TelegramLongPollingBot;
import org.telegram.telegrambots.exceptions.TelegramApiException;

import java.util.ArrayList;
import java.util.List;

import static java.lang.Math.toIntExact;

public class BotApi20 extends TelegramLongPollingBot {
    @Override
    public void onUpdateReceived(Update update) {

        // We check if the update has a message and the message has text
        if (update.hasMessage() && update.getMessage().hasText()) {
            String message_text = update.getMessage().getText();
            long chat_id = update.getMessage().getChatId();
            if (update.getMessage().getText().equals("/start")) {


                SendMessage message = new SendMessage() // Create a message object object
                        .setChatId(chat_id)
                        .setText("You send /start");
                InlineKeyboardMarkup markupInline = new InlineKeyboardMarkup();
                List<List<InlineKeyboardButton>> rowsInline = new ArrayList<>();
                List<InlineKeyboardButton> rowInline = new ArrayList<>();
                rowInline.add(new InlineKeyboardButton().setText("Update message text").setCallbackData("update_msg_text"));
                // Set the keyboard to the markup
                rowsInline.add(rowInline);
                // Add it to the message
                markupInline.setKeyboard(rowsInline);
                message.setReplyMarkup(markupInline);
                try {
                    execute(message); // Sending our message object to user
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            } else {

            }

        } else if (update.hasCallbackQuery()) {
            // Set variables
            String call_data = update.getCallbackQuery().getData();
            long message_id = update.getCallbackQuery().getMessage().getMessageId();
            long chat_id = update.getCallbackQuery().getMessage().getChatId();

            if (call_data.equals("update_msg_text")) {
                String answer = "Updated message text";
                EditMessageText new_message = new EditMessageText()
                        .setChatId(chat_id)
                        .setMessageId(toIntExact(message_id))
                        .setText(answer);
                try {
                    execute(new_message);
                } catch (TelegramApiException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    @Override
    public String getBotUsername() {
        // Return bot username
        // If bot username is @MyAmazingBot, it must return 'MyAmazingBot'
        return "BotApi20Bot";
    }

    @Override
    public String getBotToken() {
        // Return bot token from BotFather
        return "12345:qwertyuiopASDGFHKMK";
    }
}

You can also find all source code to all of my lessons at GitHub.

Thank you for reading this! Now you can send Inline Keyboards and edit message's text and extra: handle callback queries. I hope you liked this lesson. Next time I will show how to create users database using MongoDB. Bye!

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