Add a flag to adjust the QR code margin (e43d1805) · Commits · e / os / android_frameworks_base

packages/SettingsLib/src/com/android/settingslib/qrcode/QrCodeGenerator.java

+32 −1

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@ import java.util.HashMap;
		import java.util.Map;

		public final class QrCodeGenerator {
		private static final int DEFAULT_MARGIN = -1;
		/**
		* Generates a barcode image with {@code contents}.
		*
		@@ -40,7 +41,20 @@ public final class QrCodeGenerator {
		*/
		public static Bitmap encodeQrCode(String contents, int size)
		throws WriterException, IllegalArgumentException {
		return encodeQrCode(contents, size, /invert=/false);
		return encodeQrCode(contents, size, DEFAULT_MARGIN, /invert=/false);
		}

		/**
		* Generates a barcode image with {@code contents}.
		*
		* @param contents The contents to encode in the barcode
		* @param size The preferred image size in pixels
		* @param margin The margin around the actual barcode
		* @return Barcode bitmap
		*/
		public static Bitmap encodeQrCode(String contents, int size, int margin)
		throws WriterException, IllegalArgumentException {
		return encodeQrCode(contents, size, margin, /invert=/false);
		}

		/**
		@@ -53,10 +67,27 @@ public final class QrCodeGenerator {
		*/
		public static Bitmap encodeQrCode(String contents, int size, boolean invert)
		throws WriterException, IllegalArgumentException {
		return encodeQrCode(contents, size, DEFAULT_MARGIN, /invert=/invert);
		}

		/**
		* Generates a barcode image with {@code contents}.
		*
		* @param contents The contents to encode in the barcode
		* @param size The preferred image size in pixels
		* @param margin The margin around the actual barcode
		* @param invert Whether to invert the black/white pixels (e.g. for dark mode)
		* @return Barcode bitmap
		*/
		public static Bitmap encodeQrCode(String contents, int size, int margin, boolean invert)
		throws WriterException, IllegalArgumentException {
		final Map<EncodeHintType, Object> hints = new HashMap<>();
		if (!isIso88591(contents)) {
		hints.put(EncodeHintType.CHARACTER_SET, StandardCharsets.UTF_8.name());
		}
		if (margin != DEFAULT_MARGIN) {
		hints.put(EncodeHintType.MARGIN, margin);
		}

		final BitMatrix qrBits = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE,
		size, size, hints);