Add parts of zxing library to generate qr codes

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/ShareActivity.java

@@ -25,6 +25,7 @@ import org.sufficientlysecure.keychain.R;
 
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 import com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentIntegratorSupportV4;
 
 import android.content.Intent;
 import android.os.Bundle;
@@ -70,7 +71,8 @@ public class ShareActivity extends SherlockFragmentActivity {
                     getResources().getText(R.string.shareKeyringWith)));
         } else if (ACTION_SHARE_KEYRING_WITH_QR_CODE.equals(action)) {
             // use barcode scanner integration library
-            new IntentIntegrator(this).shareText(keyringArmored.get(0));
+//            new IntentIntegrator(this).shareText(keyringArmored.get(0));
+//            new IntentIntegratorSupportV4(this).shareText(activity, text);
         }
     }
 }

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/util/QrCodeUtils.java

@@ -0,0 +1,121 @@
+/*
+ * 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.H);
+            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;
+    // }
+    // }
+}