1 files changed, 72 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/QrCodeUtils.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/QrCodeUtils.java
new file mode 100644
index 000000000..af9034aa7
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/QrCodeUtils.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2011 Andreas Schildbach
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.util;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.BitMatrix;
+import com.google.zxing.qrcode.QRCodeWriter;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+
+import org.sufficientlysecure.keychain.Constants;
+
+import java.util.Hashtable;
+
+public class QrCodeUtils {
+    public static final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
+
+    /**
+     * Generate Bitmap with QR Code based on input.
+     *
+     * @param input
+     * @param size
+     * @return QR Code as Bitmap
+     */
+    public static Bitmap getQRCodeBitmap(final String input, final int size) {
+        try {
+            final Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
+            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
+            final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size,
+                    size, hints);
+
+            final int width = result.getWidth();
+            final int height = result.getHeight();
+            final int[] pixels = new int[width * height];
+
+            for (int y = 0; y < height; y++) {
+                final int offset = y * width;
+                for (int x = 0; x < width; x++) {
+                    pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
+                }
+            }
+
+            final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+            return bitmap;
+        } catch (final WriterException e) {
+            Log.e(Constants.TAG, "QrCodeUtils", e);
+            return null;
+        }
+    }
+
+}