1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* 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 java.util.Hashtable;
import org.sufficientlysecure.keychain.Constants;
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;
public class QrCodeUtils {
public final static 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;
}
}
/**
* Displays QrCode in Dialog
*/
// public static void showQrCode(Activity activity, Bitmap qrCodeBitmap) {
// final Dialog dialog = new Dialog(activity);
// dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
// dialog.setContentView(R.layout.qr_code_dialog);
// final ImageView imageView = (ImageView) dialog.findViewById(R.id.qr_dialog_view);
// imageView.setImageBitmap(qrCodeBitmap);
// dialog.setCanceledOnTouchOutside(true);
// dialog.show();
// imageView.setOnClickListener(new OnClickListener() {
// public void onClick(final View v) {
// dialog.dismiss();
// }
// });
// }
/**
* Starts Scanning of Barcode with Barcode Scanner App, if Barcode Scanner is not installed
* requests install of it, done by using IntentIntegrator from Barcode Scanner
*
* @param activity
*/
// public static void scanQrCode(Activity activity) {
// IntentIntegrator.initiateScan(activity, R.string.no_barcode_scanner_title,
// R.string.no_barcode_scanner, R.string.button_yes, R.string.button_no);
// }
//
// /**
// * Return scanned QR Code as String, must be used in Activities onActivityResult(), done by
// * using IntentIntegrator from Barcode Scanner
// *
// * @param requestCode
// * @param resultCode
// * @param intent
// * @return QR Code content as String
// */
// public static String returnQrCodeOnActivityResult(int requestCode, int resultCode, Intent
// intent) {
// IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode,
// intent);
//
// if (scanResult != null) {
// return scanResult.getContents();
// } else {
// return null;
// }
// }
}
|
