2 * Copyright (C) 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.client.android.encode;
19 import com.google.zxing.BarcodeFormat;
20 import com.google.zxing.EncodeHintType;
21 import com.google.zxing.MultiFormatWriter;
22 import com.google.zxing.Result;
23 import com.google.zxing.WriterException;
24 import com.google.zxing.client.android.Contents;
25 import com.google.zxing.client.android.Intents;
26 import com.google.zxing.client.android.R;
27 import com.google.zxing.client.result.AddressBookParsedResult;
28 import com.google.zxing.client.result.ParsedResult;
29 import com.google.zxing.client.result.ResultParser;
30 import com.google.zxing.common.BitMatrix;
32 import android.app.Activity;
33 import android.content.Intent;
34 import android.graphics.Bitmap;
35 import android.net.Uri;
36 import android.os.Bundle;
37 import android.os.Handler;
38 import android.provider.Contacts;
39 import android.telephony.PhoneNumberUtils;
40 import android.util.Log;
42 import java.io.IOException;
43 import java.io.InputStream;
44 import java.util.Hashtable;
47 * This class does the work of decoding the user's request and extracting all the data
48 * to be encoded in a barcode.
50 * @author dswitkin@google.com (Daniel Switkin)
52 final class QRCodeEncoder {
54 private static final String TAG = QRCodeEncoder.class.getSimpleName();
56 private static final int WHITE = 0xFFFFFFFF;
57 private static final int BLACK = 0xFF000000;
59 private final Activity activity;
60 private String contents;
61 private String displayContents;
63 private BarcodeFormat format;
65 QRCodeEncoder(Activity activity, Intent intent) {
66 this.activity = activity;
68 throw new IllegalArgumentException("No valid data to encode.");
71 String action = intent.getAction();
72 if (action.equals(Intents.Encode.ACTION)) {
73 if (!encodeContentsFromZXingIntent(intent)) {
74 throw new IllegalArgumentException("No valid data to encode.");
76 } else if (action.equals(Intent.ACTION_SEND)) {
77 if (!encodeContentsFromShareIntent(intent)) {
78 throw new IllegalArgumentException("No valid data to encode.");
83 public void requestBarcode(Handler handler, int pixelResolution) {
84 Thread encodeThread = new EncodeThread(contents, handler, pixelResolution,
89 public String getContents() {
93 public String getDisplayContents() {
94 return displayContents;
97 public String getTitle() {
101 public String getFormat() {
102 return format.toString();
105 // It would be nice if the string encoding lived in the core ZXing library,
106 // but we use platform specific code like PhoneNumberUtils, so it can't.
107 private boolean encodeContentsFromZXingIntent(Intent intent) {
108 // Default to QR_CODE if no format given.
109 String formatString = intent.getStringExtra(Intents.Encode.FORMAT);
111 format = BarcodeFormat.valueOf(formatString);
112 } catch (IllegalArgumentException iae) {
117 if (format == null || BarcodeFormat.QR_CODE.equals(format)) {
118 String type = intent.getStringExtra(Intents.Encode.TYPE);
119 if (type == null || type.length() == 0) {
122 this.format = BarcodeFormat.QR_CODE;
123 encodeQRCodeContents(intent, type);
125 String data = intent.getStringExtra(Intents.Encode.DATA);
126 if (data != null && data.length() != 0) {
128 displayContents = data;
129 title = activity.getString(R.string.contents_text);
132 return contents != null && contents.length() > 0;
135 // Handles send intents from the Contacts app, retrieving a contact as a VCARD.
136 private boolean encodeContentsFromShareIntent(Intent intent) {
137 format = BarcodeFormat.QR_CODE;
139 Uri uri = (Uri)intent.getExtras().getParcelable(Intent.EXTRA_STREAM);
140 InputStream stream = activity.getContentResolver().openInputStream(uri);
141 int length = stream.available();
142 byte[] vcard = new byte[length];
143 int bytesRead = stream.read(vcard, 0, length);
144 String vcardString = new String(vcard, 0, bytesRead, "UTF-8");
145 Log.d(TAG, "Encoding share intent content:");
146 Log.d(TAG, vcardString);
147 Result result = new Result(vcardString, vcard, null, BarcodeFormat.QR_CODE);
148 ParsedResult parsedResult = ResultParser.parseResult(result);
149 if (!(parsedResult instanceof AddressBookParsedResult)) {
150 Log.d(TAG, "Result was not an address");
153 if (!encodeQRCodeContents((AddressBookParsedResult) parsedResult)) {
154 Log.d(TAG, "Unable to encode contents");
157 } catch (IOException e) {
160 } catch (NullPointerException e) {
162 // In case the uri was not found in the Intent.
165 return contents != null && contents.length() > 0;
168 private void encodeQRCodeContents(Intent intent, String type) {
169 if (type.equals(Contents.Type.TEXT)) {
170 String data = intent.getStringExtra(Intents.Encode.DATA);
171 if (data != null && data.length() > 0) {
173 displayContents = data;
174 title = activity.getString(R.string.contents_text);
176 } else if (type.equals(Contents.Type.EMAIL)) {
177 String data = intent.getStringExtra(Intents.Encode.DATA);
178 if (data != null && data.length() > 0) {
179 contents = "mailto:" + data;
180 displayContents = data;
181 title = activity.getString(R.string.contents_email);
183 } else if (type.equals(Contents.Type.PHONE)) {
184 String data = intent.getStringExtra(Intents.Encode.DATA);
185 if (data != null && data.length() > 0) {
186 contents = "tel:" + data;
187 displayContents = PhoneNumberUtils.formatNumber(data);
188 title = activity.getString(R.string.contents_phone);
190 } else if (type.equals(Contents.Type.SMS)) {
191 String data = intent.getStringExtra(Intents.Encode.DATA);
192 if (data != null && data.length() > 0) {
193 contents = "sms:" + data;
194 displayContents = PhoneNumberUtils.formatNumber(data);
195 title = activity.getString(R.string.contents_sms);
197 } else if (type.equals(Contents.Type.CONTACT)) {
198 Bundle bundle = intent.getBundleExtra(Intents.Encode.DATA);
199 if (bundle != null) {
200 StringBuilder newContents = new StringBuilder();
201 StringBuilder newDisplayContents = new StringBuilder();
202 newContents.append("MECARD:");
203 String name = bundle.getString(Contacts.Intents.Insert.NAME);
204 if (name != null && name.length() > 0) {
205 newContents.append("N:").append(name).append(';');
206 newDisplayContents.append(name);
208 String address = bundle.getString(Contacts.Intents.Insert.POSTAL);
209 if (address != null && address.length() > 0) {
210 newContents.append("ADR:").append(address).append(';');
211 newDisplayContents.append('\n').append(address);
213 for (int x = 0; x < Contents.PHONE_KEYS.length; x++) {
214 String phone = bundle.getString(Contents.PHONE_KEYS[x]);
215 if (phone != null && phone.length() > 0) {
216 newContents.append("TEL:").append(phone).append(';');
217 newDisplayContents.append('\n').append(PhoneNumberUtils.formatNumber(phone));
220 for (int x = 0; x < Contents.EMAIL_KEYS.length; x++) {
221 String email = bundle.getString(Contents.EMAIL_KEYS[x]);
222 if (email != null && email.length() > 0) {
223 newContents.append("EMAIL:").append(email).append(';');
224 newDisplayContents.append('\n').append(email);
227 // Make sure we've encoded at least one field.
228 if (newDisplayContents.length() > 0) {
229 newContents.append(';');
230 contents = newContents.toString();
231 displayContents = newDisplayContents.toString();
232 title = activity.getString(R.string.contents_contact);
235 displayContents = null;
238 } else if (type.equals(Contents.Type.LOCATION)) {
239 Bundle bundle = intent.getBundleExtra(Intents.Encode.DATA);
240 if (bundle != null) {
241 // These must use Bundle.getFloat(), not getDouble(), it's part of the API.
242 float latitude = bundle.getFloat("LAT", Float.MAX_VALUE);
243 float longitude = bundle.getFloat("LONG", Float.MAX_VALUE);
244 if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {
245 contents = "geo:" + latitude + ',' + longitude;
246 displayContents = latitude + "," + longitude;
247 title = activity.getString(R.string.contents_location);
253 private boolean encodeQRCodeContents(AddressBookParsedResult contact) {
254 StringBuilder newContents = new StringBuilder();
255 StringBuilder newDisplayContents = new StringBuilder();
256 newContents.append("MECARD:");
257 String[] names = contact.getNames();
258 if (names != null && names.length > 0) {
259 newContents.append("N:").append(names[0]).append(';');
260 newDisplayContents.append(names[0]);
262 String[] addresses = contact.getAddresses();
263 if (addresses != null) {
264 for (String address : addresses) {
265 if (address != null && address.length() > 0) {
266 newContents.append("ADR:").append(address).append(';');
267 newDisplayContents.append('\n').append(address);
271 String[] phoneNumbers = contact.getPhoneNumbers();
272 if (phoneNumbers != null) {
273 for (String phone : phoneNumbers) {
274 if (phone != null && phone.length() > 0) {
275 newContents.append("TEL:").append(phone).append(';');
276 newDisplayContents.append('\n').append(PhoneNumberUtils.formatNumber(phone));
280 String[] emails = contact.getEmails();
281 if (emails != null) {
282 for (String email : emails) {
283 if (email != null && email.length() > 0) {
284 newContents.append("EMAIL:").append(email).append(';');
285 newDisplayContents.append('\n').append(email);
289 String url = contact.getURL();
290 if (url != null && url.length() > 0) {
291 newContents.append("URL:").append(url).append(';');
292 newDisplayContents.append('\n').append(url);
294 // Make sure we've encoded at least one field.
295 if (newDisplayContents.length() > 0) {
296 newContents.append(';');
297 contents = newContents.toString();
298 displayContents = newDisplayContents.toString();
299 title = activity.getString(R.string.contents_contact);
303 displayContents = null;
308 static Bitmap encodeAsBitmap(String contents,
309 BarcodeFormat format,
311 int desiredHeight) throws WriterException {
312 Hashtable hints = null;
313 String encoding = guessAppropriateEncoding(contents);
314 if (encoding != null) {
315 hints = new Hashtable(2);
316 hints.put(EncodeHintType.CHARACTER_SET, encoding);
318 MultiFormatWriter writer = new MultiFormatWriter();
319 BitMatrix result = writer.encode(contents, format, desiredWidth, desiredHeight, hints);
320 int width = result.getWidth();
321 int height = result.getHeight();
322 int[] pixels = new int[width * height];
323 // All are 0, or black, by default
324 for (int y = 0; y < height; y++) {
325 int offset = y * width;
326 for (int x = 0; x < width; x++) {
327 pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
331 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
332 bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
336 private static String guessAppropriateEncoding(CharSequence contents) {
337 // Very crude at the moment
338 for (int i = 0; i < contents.length(); i++) {
339 if (contents.charAt(i) > 0xFF) {