How to Generate QR Code in Android?

package org.geeksforgeeks.demo;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.journeyapps.barcodescanner.BarcodeEncoder;

public class MainActivity extends AppCompatActivity {

    // Variables for imageview, edittext,
    // button, bitmap and qrencoder.
    private ImageView qrCodeIV;
    private EditText dataEdt;
    private Button generateQrBtn;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Initializing all variables.
        qrCodeIV = findViewById(R.id.idIVQrcode);
        dataEdt = findViewById(R.id.idEdt);
        generateQrBtn = findViewById(R.id.idBtnGenerateQR);

        // Initializing onclick listener for button.
        generateQrBtn.setOnClickListener(
            new View.OnClickListener() {
                @Override public void onClick(View v)
                {
                    if (TextUtils.isEmpty(
                            dataEdt.getText().toString())) {

                        // If the edittext inputs are empty
                        // then execute this method showing
                        // a toast message.
                        Toast.makeText(MainActivity.this,"Enter some text to generate QR Code",Toast.LENGTH_SHORT).show();
                    }
                    else {
                        generateQRCode(
                            dataEdt.getText().toString());
                    }
                }
            });
    }

    private void generateQRCode(String text)
    {
        BarcodeEncoder barcodeEncoder
            = new BarcodeEncoder();
        try {
            
            // This method returns a Bitmap image of the
            // encoded text with a height and width of 400
            // pixels.
            Bitmap bitmap = barcodeEncoder.encodeBitmap(text, BarcodeFormat.QR_CODE, 400, 400);
            
            // Sets the Bitmap to ImageView
            qrCodeIV.setImageBitmap(bitmap); 
        }
        catch (WriterException e) {
            e.printStackTrace();
        }
    }
}