Skip to content

Instantly share code, notes, and snippets.

@adrianoluis
Created February 8, 2017 02:51
Show Gist options
  • Save adrianoluis/fa9374d7f2f8ca1115b00cc83cd7aacd to your computer and use it in GitHub Desktop.
Save adrianoluis/fa9374d7f2f8ca1115b00cc83cd7aacd to your computer and use it in GitHub Desktop.
Simple utility class to create QR Code as Bitmap on Android using ZXing library
import android.graphics.Bitmap;
import android.graphics.Color;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
public class QRCodeUtil {
private QRCodeUtil() {}
public static Bitmap encodeAsBitmap(String source, int width, int height) {
BitMatrix result;
try {
result = new MultiFormatWriter().encode(source, BarcodeFormat.QR_CODE, width, height, null);
} catch (IllegalArgumentException | WriterException e) {
// Unsupported format
return null;
}
final int w = result.getWidth();
final int h = result.getHeight();
final int[] pixels = new int[w * h];
for (int y = 0; y < h; y++) {
final int offset = y * w;
for (int x = 0; x < w; x++) {
pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.WHITE;
}
}
final Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, w, h);
return bitmap;
}
}
@Mubeyd
Copy link

Mubeyd commented Apr 22, 2022

It was very useful, Thanks. 👍

@PistonDragon
Copy link

Great!
HelpFULL!
I tried to get image from text, but the most of codes gave error.
Only your code SUCCESS.
thanks

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment