diff options
author | Dominik Schürmann <dominik@dominikschuermann.de> | 2014-09-17 21:51:25 +0200 |
---|---|---|
committer | Dominik Schürmann <dominik@dominikschuermann.de> | 2014-09-17 21:51:25 +0200 |
commit | b09d222f3416d155153a681ed256c46fbf5b386a (patch) | |
tree | 2fd26f521ebc2d5fc29a2bb0cb83c0d3b91319b1 /OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java | |
parent | a139be29ba556468ca282c96e5c985762c466b5b (diff) | |
download | open-keychain-b09d222f3416d155153a681ed256c46fbf5b386a.tar.gz open-keychain-b09d222f3416d155153a681ed256c46fbf5b386a.tar.bz2 open-keychain-b09d222f3416d155153a681ed256c46fbf5b386a.zip |
package reordering: merge util and helper, there were no real difference; created ui.util for everything related to formatting
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java')
-rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java new file mode 100644 index 000000000..dd07a16b0 --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/QrCodeUtils.java @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2013-2014 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.ui.util; + +import android.graphics.Bitmap; +import android.graphics.Color; + +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 org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.util.Log; + +import java.util.Hashtable; + +/** + * Copied from Bitcoin Wallet + */ +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; + } + } + +} |