android/src/com/google/zxing/client/android/encode/QRCodeEncoder.java - platform/external/zxing - Git at Google

 /*
  * Copyright (C) 2008 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.google.zxing.client.android.encode;

 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.EncodeHintType;
 import com.google.zxing.MultiFormatWriter;
 import com.google.zxing.Result;
 import com.google.zxing.WriterException;
 import com.google.zxing.client.android.Contents;
 import com.google.zxing.client.android.Intents;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.AddressBookParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.ResultParser;
 import com.google.zxing.common.BitMatrix;

 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Bundle;
 import android.provider.ContactsContract;
 import android.util.Log;

 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.EnumMap;
 import java.util.List;
 import java.util.Map;

 /**
  * This class does the work of decoding the user's request and extracting all the data
  * to be encoded in a barcode.
  *
  * @author dswitkin@google.com (Daniel Switkin)
  */
 final class QRCodeEncoder {

   private static final String TAG = QRCodeEncoder.class.getSimpleName();

   private static final int WHITE = 0xFFFFFFFF;
   private static final int BLACK = 0xFF000000;

   private final Context activity;
   private String contents;
   private String displayContents;
   private String title;
   private BarcodeFormat format;
   private final int dimension;
   private final boolean useVCard;

   QRCodeEncoder(Context activity, Intent intent, int dimension, boolean useVCard) throws WriterException {
     this.activity = activity;
     this.dimension = dimension;
     this.useVCard = useVCard;
     String action = intent.getAction();
     if (Intents.Encode.ACTION.equals(action)) {
       encodeContentsFromZXingIntent(intent);
     } else if (Intent.ACTION_SEND.equals(action)) {
       encodeContentsFromShareIntent(intent);
     }
   }

   String getContents() {
     return contents;
   }

   String getDisplayContents() {
     return displayContents;
   }

   String getTitle() {
     return title;
   }

   boolean isUseVCard() {
     return useVCard;
   }

   // It would be nice if the string encoding lived in the core ZXing library,
   // but we use platform specific code like PhoneNumberUtils, so it can't.
   private void encodeContentsFromZXingIntent(Intent intent) {
      // Default to QR_CODE if no format given.
     String formatString = intent.getStringExtra(Intents.Encode.FORMAT);
     format = null;
     if (formatString != null) {
       try {
         format = BarcodeFormat.valueOf(formatString);
       } catch (IllegalArgumentException iae) {
         // Ignore it then
       }
     }
     if (format == null || format == BarcodeFormat.QR_CODE) {
       String type = intent.getStringExtra(Intents.Encode.TYPE);
       if (type != null && !type.isEmpty()) {
         this.format = BarcodeFormat.QR_CODE;
         encodeQRCodeContents(intent, type);
       }
     } else {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && !data.isEmpty()) {
         contents = data;
         displayContents = data;
         title = activity.getString(R.string.contents_text);
       }
     }
   }

   // Handles send intents from multitude of Android applications
   private void encodeContentsFromShareIntent(Intent intent) throws WriterException {
     // Check if this is a plain text encoding, or contact
     if (intent.hasExtra(Intent.EXTRA_STREAM)) {
       encodeFromStreamExtra(intent);
     } else {
       encodeFromTextExtras(intent);
     }
   }

   private void encodeFromTextExtras(Intent intent) throws WriterException {
     // Notice: Google Maps shares both URL and details in one text, bummer!
     String theContents = ContactEncoder.trim(intent.getStringExtra(Intent.EXTRA_TEXT));
     if (theContents == null) {
       theContents = ContactEncoder.trim(intent.getStringExtra("android.intent.extra.HTML_TEXT"));
       // Intent.EXTRA_HTML_TEXT
       if (theContents == null) {
         theContents = ContactEncoder.trim(intent.getStringExtra(Intent.EXTRA_SUBJECT));
         if (theContents == null) {
           String[] emails = intent.getStringArrayExtra(Intent.EXTRA_EMAIL);
           if (emails != null) {
             theContents = ContactEncoder.trim(emails[0]);
           } else {
             theContents = "?";
           }
         }
       }
     }

     // Trim text to avoid URL breaking.
     if (theContents == null || theContents.isEmpty()) {
       throw new WriterException("Empty EXTRA_TEXT");
     }
     contents = theContents;
     // We only do QR code.
     format = BarcodeFormat.QR_CODE;
     if (intent.hasExtra(Intent.EXTRA_SUBJECT)) {
       displayContents = intent.getStringExtra(Intent.EXTRA_SUBJECT);
     } else if (intent.hasExtra(Intent.EXTRA_TITLE)) {
       displayContents = intent.getStringExtra(Intent.EXTRA_TITLE);
     } else {
       displayContents = contents;
     }
     title = activity.getString(R.string.contents_text);
   }

   // Handles send intents from the Contacts app, retrieving a contact as a VCARD.
   private void encodeFromStreamExtra(Intent intent) throws WriterException {
     format = BarcodeFormat.QR_CODE;
     Bundle bundle = intent.getExtras();
     if (bundle == null) {
       throw new WriterException("No extras");
     }
     Uri uri = bundle.getParcelable(Intent.EXTRA_STREAM);
     if (uri == null) {
       throw new WriterException("No EXTRA_STREAM");
     }
     byte[] vcard;
     String vcardString;
     try (InputStream stream = activity.getContentResolver().openInputStream(uri)) {
       if (stream == null) {
         throw new WriterException("Can't open stream for " + uri);
       }
       ByteArrayOutputStream baos = new ByteArrayOutputStream();
       byte[] buffer = new byte[2048];
       int bytesRead;
       while ((bytesRead = stream.read(buffer)) > 0) {
         baos.write(buffer, 0, bytesRead);
       }
       vcard = baos.toByteArray();
       vcardString = new String(vcard, 0, vcard.length, "UTF-8");
     } catch (IOException ioe) {
       throw new WriterException(ioe);
     }
     Log.d(TAG, "Encoding share intent content:");
     Log.d(TAG, vcardString);
     Result result = new Result(vcardString, vcard, null, BarcodeFormat.QR_CODE);
     ParsedResult parsedResult = ResultParser.parseResult(result);
     if (!(parsedResult instanceof AddressBookParsedResult)) {
       throw new WriterException("Result was not an address");
     }
     encodeQRCodeContents((AddressBookParsedResult) parsedResult);
     if (contents == null || contents.isEmpty()) {
       throw new WriterException("No content to encode");
     }
   }

   private void encodeQRCodeContents(Intent intent, String type) {
     switch (type) {
       case Contents.Type.TEXT:
         String textData = intent.getStringExtra(Intents.Encode.DATA);
         if (textData != null && !textData.isEmpty()) {
           contents = textData;
           displayContents = textData;
           title = activity.getString(R.string.contents_text);
         }
         break;

       case Contents.Type.EMAIL:
         String emailData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
         if (emailData != null) {
           contents = "mailto:" + emailData;
           displayContents = emailData;
           title = activity.getString(R.string.contents_email);
         }
         break;

       case Contents.Type.PHONE:
         String phoneData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
         if (phoneData != null) {
           contents = "tel:" + phoneData;
           displayContents = ContactEncoder.formatPhone(phoneData);
           title = activity.getString(R.string.contents_phone);
         }
         break;

       case Contents.Type.SMS:
         String smsData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
         if (smsData != null) {
           contents = "sms:" + smsData;
           displayContents = ContactEncoder.formatPhone(smsData);
           title = activity.getString(R.string.contents_sms);
         }
         break;

       case Contents.Type.CONTACT:
         Bundle contactBundle = intent.getBundleExtra(Intents.Encode.DATA);
         if (contactBundle != null) {

           String name = contactBundle.getString(ContactsContract.Intents.Insert.NAME);
           String organization = contactBundle.getString(ContactsContract.Intents.Insert.COMPANY);
           String address = contactBundle.getString(ContactsContract.Intents.Insert.POSTAL);
           List<String> phones = getAllBundleValues(contactBundle, Contents.PHONE_KEYS);
           List<String> phoneTypes = getAllBundleValues(contactBundle, Contents.PHONE_TYPE_KEYS);
           List<String> emails = getAllBundleValues(contactBundle, Contents.EMAIL_KEYS);
           String url = contactBundle.getString(Contents.URL_KEY);
           List<String> urls = url == null ? null : Collections.singletonList(url);
           String note = contactBundle.getString(Contents.NOTE_KEY);

           ContactEncoder encoder = useVCard ? new VCardContactEncoder() : new MECARDContactEncoder();
           String[] encoded = encoder.encode(Collections.singletonList(name),
                                             organization,
                                             Collections.singletonList(address),
                                             phones,
                                             phoneTypes,
                                             emails,
                                             urls,
                                             note);
           // Make sure we've encoded at least one field.
           if (!encoded[1].isEmpty()) {
             contents = encoded[0];
             displayContents = encoded[1];
             title = activity.getString(R.string.contents_contact);
           }

         }
         break;

       case Contents.Type.LOCATION:
         Bundle locationBundle = intent.getBundleExtra(Intents.Encode.DATA);
         if (locationBundle != null) {
           // These must use Bundle.getFloat(), not getDouble(), it's part of the API.
           float latitude = locationBundle.getFloat("LAT", Float.MAX_VALUE);
           float longitude = locationBundle.getFloat("LONG", Float.MAX_VALUE);
           if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {
             contents = "geo:" + latitude + ',' + longitude;
             displayContents = latitude + "," + longitude;
             title = activity.getString(R.string.contents_location);
           }
         }
         break;
     }
   }

   private static List<String> getAllBundleValues(Bundle bundle, String[] keys) {
     List<String> values = new ArrayList<>(keys.length);
     for (String key : keys) {
       Object value = bundle.get(key);
       values.add(value == null ? null : value.toString());
     }
     return values;
   }

   private void encodeQRCodeContents(AddressBookParsedResult contact) {
     ContactEncoder encoder = useVCard ? new VCardContactEncoder() : new MECARDContactEncoder();
     String[] encoded = encoder.encode(toList(contact.getNames()),
                                       contact.getOrg(),
                                       toList(contact.getAddresses()),
                                       toList(contact.getPhoneNumbers()),
                                       null,
                                       toList(contact.getEmails()),
                                       toList(contact.getURLs()),
                                       null);
     // Make sure we've encoded at least one field.
     if (!encoded[1].isEmpty()) {
       contents = encoded[0];
       displayContents = encoded[1];
       title = activity.getString(R.string.contents_contact);
     }
   }

   private static List<String> toList(String[] values) {
     return values == null ? null : Arrays.asList(values);
   }

   Bitmap encodeAsBitmap() throws WriterException {
     String contentsToEncode = contents;
     if (contentsToEncode == null) {
       return null;
     }
     Map<EncodeHintType,Object> hints = null;
     String encoding = guessAppropriateEncoding(contentsToEncode);
     if (encoding != null) {
       hints = new EnumMap<>(EncodeHintType.class);
       hints.put(EncodeHintType.CHARACTER_SET, encoding);
     }
     BitMatrix result;
     try {
       result = new MultiFormatWriter().encode(contentsToEncode, format, dimension, dimension, hints);
     } catch (IllegalArgumentException iae) {
       // Unsupported format
       return null;
     }
     int width = result.getWidth();
     int height = result.getHeight();
     int[] pixels = new int[width * height];
     for (int y = 0; y < height; y++) {
       int offset = y * width;
       for (int x = 0; x < width; x++) {
         pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
       }
     }

     Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
     bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
     return bitmap;
   }

   private static String guessAppropriateEncoding(CharSequence contents) {
     // Very crude at the moment
     for (int i = 0; i < contents.length(); i++) {
       if (contents.charAt(i) > 0xFF) {
         return "UTF-8";
       }
     }
     return null;
   }

 }
	/*
	* Copyright (C) 2008 ZXing authors
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.google.zxing.client.android.encode;

	import com.google.zxing.BarcodeFormat;
	import com.google.zxing.EncodeHintType;
	import com.google.zxing.MultiFormatWriter;
	import com.google.zxing.Result;
	import com.google.zxing.WriterException;
	import com.google.zxing.client.android.Contents;
	import com.google.zxing.client.android.Intents;
	import com.google.zxing.client.android.R;
	import com.google.zxing.client.result.AddressBookParsedResult;
	import com.google.zxing.client.result.ParsedResult;
	import com.google.zxing.client.result.ResultParser;
	import com.google.zxing.common.BitMatrix;

	import android.content.Context;
	import android.content.Intent;
	import android.graphics.Bitmap;
	import android.net.Uri;
	import android.os.Bundle;
	import android.provider.ContactsContract;
	import android.util.Log;

	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.EnumMap;
	import java.util.List;
	import java.util.Map;

	/**
	* This class does the work of decoding the user's request and extracting all the data
	* to be encoded in a barcode.
	*
	* @author dswitkin@google.com (Daniel Switkin)
	*/
	final class QRCodeEncoder {

	private static final String TAG = QRCodeEncoder.class.getSimpleName();

	private static final int WHITE = 0xFFFFFFFF;
	private static final int BLACK = 0xFF000000;

	private final Context activity;
	private String contents;
	private String displayContents;
	private String title;
	private BarcodeFormat format;
	private final int dimension;
	private final boolean useVCard;

	QRCodeEncoder(Context activity, Intent intent, int dimension, boolean useVCard) throws WriterException {
	this.activity = activity;
	this.dimension = dimension;
	this.useVCard = useVCard;
	String action = intent.getAction();
	if (Intents.Encode.ACTION.equals(action)) {
	encodeContentsFromZXingIntent(intent);
	} else if (Intent.ACTION_SEND.equals(action)) {
	encodeContentsFromShareIntent(intent);
	}
	}

	String getContents() {
	return contents;
	}

	String getDisplayContents() {
	return displayContents;
	}

	String getTitle() {
	return title;
	}

	boolean isUseVCard() {
	return useVCard;
	}

	// It would be nice if the string encoding lived in the core ZXing library,
	// but we use platform specific code like PhoneNumberUtils, so it can't.
	private void encodeContentsFromZXingIntent(Intent intent) {
	// Default to QR_CODE if no format given.
	String formatString = intent.getStringExtra(Intents.Encode.FORMAT);
	format = null;
	if (formatString != null) {
	try {
	format = BarcodeFormat.valueOf(formatString);
	} catch (IllegalArgumentException iae) {
	// Ignore it then
	}
	}
	if (format == null \|\| format == BarcodeFormat.QR_CODE) {
	String type = intent.getStringExtra(Intents.Encode.TYPE);
	if (type != null && !type.isEmpty()) {
	this.format = BarcodeFormat.QR_CODE;
	encodeQRCodeContents(intent, type);
	}
	} else {
	String data = intent.getStringExtra(Intents.Encode.DATA);
	if (data != null && !data.isEmpty()) {
	contents = data;
	displayContents = data;
	title = activity.getString(R.string.contents_text);
	}
	}
	}

	// Handles send intents from multitude of Android applications
	private void encodeContentsFromShareIntent(Intent intent) throws WriterException {
	// Check if this is a plain text encoding, or contact
	if (intent.hasExtra(Intent.EXTRA_STREAM)) {
	encodeFromStreamExtra(intent);
	} else {
	encodeFromTextExtras(intent);
	}
	}

	private void encodeFromTextExtras(Intent intent) throws WriterException {
	// Notice: Google Maps shares both URL and details in one text, bummer!
	String theContents = ContactEncoder.trim(intent.getStringExtra(Intent.EXTRA_TEXT));
	if (theContents == null) {
	theContents = ContactEncoder.trim(intent.getStringExtra("android.intent.extra.HTML_TEXT"));
	// Intent.EXTRA_HTML_TEXT
	if (theContents == null) {
	theContents = ContactEncoder.trim(intent.getStringExtra(Intent.EXTRA_SUBJECT));
	if (theContents == null) {
	String[] emails = intent.getStringArrayExtra(Intent.EXTRA_EMAIL);
	if (emails != null) {
	theContents = ContactEncoder.trim(emails[0]);
	} else {
	theContents = "?";
	}
	}
	}
	}

	// Trim text to avoid URL breaking.
	if (theContents == null \|\| theContents.isEmpty()) {
	throw new WriterException("Empty EXTRA_TEXT");
	}
	contents = theContents;
	// We only do QR code.
	format = BarcodeFormat.QR_CODE;
	if (intent.hasExtra(Intent.EXTRA_SUBJECT)) {
	displayContents = intent.getStringExtra(Intent.EXTRA_SUBJECT);
	} else if (intent.hasExtra(Intent.EXTRA_TITLE)) {
	displayContents = intent.getStringExtra(Intent.EXTRA_TITLE);
	} else {
	displayContents = contents;
	}
	title = activity.getString(R.string.contents_text);
	}

	// Handles send intents from the Contacts app, retrieving a contact as a VCARD.
	private void encodeFromStreamExtra(Intent intent) throws WriterException {
	format = BarcodeFormat.QR_CODE;
	Bundle bundle = intent.getExtras();
	if (bundle == null) {
	throw new WriterException("No extras");
	}
	Uri uri = bundle.getParcelable(Intent.EXTRA_STREAM);
	if (uri == null) {
	throw new WriterException("No EXTRA_STREAM");
	}
	byte[] vcard;
	String vcardString;
	try (InputStream stream = activity.getContentResolver().openInputStream(uri)) {
	if (stream == null) {
	throw new WriterException("Can't open stream for " + uri);
	}
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	byte[] buffer = new byte[2048];
	int bytesRead;
	while ((bytesRead = stream.read(buffer)) > 0) {
	baos.write(buffer, 0, bytesRead);
	}
	vcard = baos.toByteArray();
	vcardString = new String(vcard, 0, vcard.length, "UTF-8");
	} catch (IOException ioe) {
	throw new WriterException(ioe);
	}
	Log.d(TAG, "Encoding share intent content:");
	Log.d(TAG, vcardString);
	Result result = new Result(vcardString, vcard, null, BarcodeFormat.QR_CODE);
	ParsedResult parsedResult = ResultParser.parseResult(result);
	if (!(parsedResult instanceof AddressBookParsedResult)) {
	throw new WriterException("Result was not an address");
	}
	encodeQRCodeContents((AddressBookParsedResult) parsedResult);
	if (contents == null \|\| contents.isEmpty()) {
	throw new WriterException("No content to encode");
	}
	}

	private void encodeQRCodeContents(Intent intent, String type) {
	switch (type) {
	case Contents.Type.TEXT:
	String textData = intent.getStringExtra(Intents.Encode.DATA);
	if (textData != null && !textData.isEmpty()) {
	contents = textData;
	displayContents = textData;
	title = activity.getString(R.string.contents_text);
	}
	break;

	case Contents.Type.EMAIL:
	String emailData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
	if (emailData != null) {
	contents = "mailto:" + emailData;
	displayContents = emailData;
	title = activity.getString(R.string.contents_email);
	}
	break;

	case Contents.Type.PHONE:
	String phoneData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
	if (phoneData != null) {
	contents = "tel:" + phoneData;
	displayContents = ContactEncoder.formatPhone(phoneData);
	title = activity.getString(R.string.contents_phone);
	}
	break;

	case Contents.Type.SMS:
	String smsData = ContactEncoder.trim(intent.getStringExtra(Intents.Encode.DATA));
	if (smsData != null) {
	contents = "sms:" + smsData;
	displayContents = ContactEncoder.formatPhone(smsData);
	title = activity.getString(R.string.contents_sms);
	}
	break;

	case Contents.Type.CONTACT:
	Bundle contactBundle = intent.getBundleExtra(Intents.Encode.DATA);
	if (contactBundle != null) {

	String name = contactBundle.getString(ContactsContract.Intents.Insert.NAME);
	String organization = contactBundle.getString(ContactsContract.Intents.Insert.COMPANY);
	String address = contactBundle.getString(ContactsContract.Intents.Insert.POSTAL);
	List<String> phones = getAllBundleValues(contactBundle, Contents.PHONE_KEYS);
	List<String> phoneTypes = getAllBundleValues(contactBundle, Contents.PHONE_TYPE_KEYS);
	List<String> emails = getAllBundleValues(contactBundle, Contents.EMAIL_KEYS);
	String url = contactBundle.getString(Contents.URL_KEY);
	List<String> urls = url == null ? null : Collections.singletonList(url);
	String note = contactBundle.getString(Contents.NOTE_KEY);

	ContactEncoder encoder = useVCard ? new VCardContactEncoder() : new MECARDContactEncoder();
	String[] encoded = encoder.encode(Collections.singletonList(name),
	organization,
	Collections.singletonList(address),
	phones,
	phoneTypes,
	emails,
	urls,
	note);
	// Make sure we've encoded at least one field.
	if (!encoded[1].isEmpty()) {
	contents = encoded[0];
	displayContents = encoded[1];
	title = activity.getString(R.string.contents_contact);
	}

	}
	break;

	case Contents.Type.LOCATION:
	Bundle locationBundle = intent.getBundleExtra(Intents.Encode.DATA);
	if (locationBundle != null) {
	// These must use Bundle.getFloat(), not getDouble(), it's part of the API.
	float latitude = locationBundle.getFloat("LAT", Float.MAX_VALUE);
	float longitude = locationBundle.getFloat("LONG", Float.MAX_VALUE);
	if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {
	contents = "geo:" + latitude + ',' + longitude;
	displayContents = latitude + "," + longitude;
	title = activity.getString(R.string.contents_location);
	}
	}
	break;
	}
	}

	private static List<String> getAllBundleValues(Bundle bundle, String[] keys) {
	List<String> values = new ArrayList<>(keys.length);
	for (String key : keys) {
	Object value = bundle.get(key);
	values.add(value == null ? null : value.toString());
	}
	return values;
	}

	private void encodeQRCodeContents(AddressBookParsedResult contact) {
	ContactEncoder encoder = useVCard ? new VCardContactEncoder() : new MECARDContactEncoder();
	String[] encoded = encoder.encode(toList(contact.getNames()),
	contact.getOrg(),
	toList(contact.getAddresses()),
	toList(contact.getPhoneNumbers()),
	null,
	toList(contact.getEmails()),
	toList(contact.getURLs()),
	null);
	// Make sure we've encoded at least one field.
	if (!encoded[1].isEmpty()) {
	contents = encoded[0];
	displayContents = encoded[1];
	title = activity.getString(R.string.contents_contact);
	}
	}

	private static List<String> toList(String[] values) {
	return values == null ? null : Arrays.asList(values);
	}

	Bitmap encodeAsBitmap() throws WriterException {
	String contentsToEncode = contents;
	if (contentsToEncode == null) {
	return null;
	}
	Map<EncodeHintType,Object> hints = null;
	String encoding = guessAppropriateEncoding(contentsToEncode);
	if (encoding != null) {
	hints = new EnumMap<>(EncodeHintType.class);
	hints.put(EncodeHintType.CHARACTER_SET, encoding);
	}
	BitMatrix result;
	try {
	result = new MultiFormatWriter().encode(contentsToEncode, format, dimension, dimension, hints);
	} catch (IllegalArgumentException iae) {
	// Unsupported format
	return null;
	}
	int width = result.getWidth();
	int height = result.getHeight();
	int[] pixels = new int[width * height];
	for (int y = 0; y < height; y++) {
	int offset = y * width;
	for (int x = 0; x < width; x++) {
	pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
	}
	}

	Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
	return bitmap;
	}

	private static String guessAppropriateEncoding(CharSequence contents) {
	// Very crude at the moment
	for (int i = 0; i < contents.length(); i++) {
	if (contents.charAt(i) > 0xFF) {
	return "UTF-8";
	}
	}
	return null;
	}

	}