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;
19 import com.google.zxing.BarcodeFormat;
20 import com.google.zxing.Result;
21 import com.google.zxing.ResultMetadataType;
22 import com.google.zxing.ResultPoint;
23 import com.google.zxing.client.android.camera.CameraManager;
24 import com.google.zxing.client.android.history.HistoryManager;
25 import com.google.zxing.client.android.result.ResultButtonListener;
26 import com.google.zxing.client.android.result.ResultHandler;
27 import com.google.zxing.client.android.result.ResultHandlerFactory;
28 import com.google.zxing.client.android.share.ShareActivity;
30 import android.app.Activity;
31 import android.app.AlertDialog;
32 import android.content.DialogInterface;
33 import android.content.Intent;
34 import android.content.SharedPreferences;
35 import android.content.pm.PackageInfo;
36 import android.content.pm.PackageManager;
37 import android.content.res.AssetFileDescriptor;
38 import android.content.res.Configuration;
39 import android.graphics.Bitmap;
40 import android.graphics.Canvas;
41 import android.graphics.Paint;
42 import android.graphics.Rect;
43 import android.media.AudioManager;
44 import android.media.MediaPlayer;
45 import android.media.MediaPlayer.OnCompletionListener;
46 import android.net.Uri;
47 import android.os.Bundle;
48 import android.os.Handler;
49 import android.os.Message;
50 import android.os.Vibrator;
51 import android.preference.PreferenceManager;
52 import android.text.ClipboardManager;
53 import android.util.Log;
54 import android.util.TypedValue;
55 import android.view.KeyEvent;
56 import android.view.Menu;
57 import android.view.MenuItem;
58 import android.view.SurfaceHolder;
59 import android.view.SurfaceView;
60 import android.view.View;
61 import android.view.ViewGroup;
62 import android.view.Window;
63 import android.view.WindowManager;
64 import android.widget.ImageView;
65 import android.widget.TextView;
66 import android.widget.Toast;
68 import java.io.IOException;
69 import java.text.DateFormat;
70 import java.util.Arrays;
71 import java.util.Date;
72 import java.util.HashSet;
73 import java.util.List;
76 import java.util.Vector;
77 import java.util.regex.Pattern;
80 * The barcode reader activity itself. This is loosely based on the CameraPreview
81 * example included in the Android SDK.
83 * @author dswitkin@google.com (Daniel Switkin)
86 public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
88 private static final String TAG = CaptureActivity.class.getSimpleName();
90 private static final Pattern COMMA_PATTERN = Pattern.compile(",");
92 private static final int SHARE_ID = Menu.FIRST;
93 private static final int HISTORY_ID = Menu.FIRST + 1;
94 private static final int SETTINGS_ID = Menu.FIRST + 2;
95 private static final int HELP_ID = Menu.FIRST + 3;
96 private static final int ABOUT_ID = Menu.FIRST + 4;
98 private static final long INTENT_RESULT_DURATION = 1500L;
99 private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
100 private static final float BEEP_VOLUME = 0.10f;
101 private static final long VIBRATE_DURATION = 200L;
103 private static final String PACKAGE_NAME = "com.google.zxing.client.android";
104 private static final String PRODUCT_SEARCH_URL_PREFIX = "http://www.google";
105 private static final String PRODUCT_SEARCH_URL_SUFFIX = "/m/products/scan";
106 private static final String ZXING_URL = "http://zxing.appspot.com/scan";
107 private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
108 private static final String RETURN_URL_PARAM = "ret";
110 static final Vector<BarcodeFormat> PRODUCT_FORMATS;
111 static final Vector<BarcodeFormat> ONE_D_FORMATS;
112 static final Vector<BarcodeFormat> QR_CODE_FORMATS;
113 static final Vector<BarcodeFormat> ALL_FORMATS;
116 PRODUCT_FORMATS = new Vector<BarcodeFormat>(5);
117 PRODUCT_FORMATS.add(BarcodeFormat.UPC_A);
118 PRODUCT_FORMATS.add(BarcodeFormat.UPC_E);
119 PRODUCT_FORMATS.add(BarcodeFormat.EAN_13);
120 PRODUCT_FORMATS.add(BarcodeFormat.EAN_8);
121 PRODUCT_FORMATS.add(BarcodeFormat.RSS14);
122 ONE_D_FORMATS = new Vector<BarcodeFormat>(PRODUCT_FORMATS.size() + 3);
123 ONE_D_FORMATS.addAll(PRODUCT_FORMATS);
124 ONE_D_FORMATS.add(BarcodeFormat.CODE_39);
125 ONE_D_FORMATS.add(BarcodeFormat.CODE_93);
126 ONE_D_FORMATS.add(BarcodeFormat.CODE_128);
127 ONE_D_FORMATS.add(BarcodeFormat.ITF);
128 QR_CODE_FORMATS = new Vector<BarcodeFormat>(1);
129 QR_CODE_FORMATS.add(BarcodeFormat.QR_CODE);
130 ALL_FORMATS = new Vector<BarcodeFormat>(ONE_D_FORMATS.size() + QR_CODE_FORMATS.size());
131 ALL_FORMATS.addAll(ONE_D_FORMATS);
132 ALL_FORMATS.addAll(QR_CODE_FORMATS);
135 private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES;
137 DISPLAYABLE_METADATA_TYPES = new HashSet<ResultMetadataType>(5);
138 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ISSUE_NUMBER);
139 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.SUGGESTED_PRICE);
140 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ERROR_CORRECTION_LEVEL);
141 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.POSSIBLE_COUNTRY);
144 private enum Source {
151 private CaptureActivityHandler handler;
153 private ViewfinderView viewfinderView;
154 private TextView statusView;
155 private View resultView;
156 private MediaPlayer mediaPlayer;
157 private Result lastResult;
158 private boolean hasSurface;
159 private boolean playBeep;
160 private boolean vibrate;
161 private boolean copyToClipboard;
162 private Source source;
163 private String sourceUrl;
164 private String returnUrlTemplate;
165 private Vector<BarcodeFormat> decodeFormats;
166 private String characterSet;
167 private String versionName;
168 private HistoryManager historyManager;
171 * When the beep has finished playing, rewind to queue up another one.
173 private final OnCompletionListener beepListener = new OnCompletionListener() {
174 public void onCompletion(MediaPlayer mediaPlayer) {
175 mediaPlayer.seekTo(0);
179 private final DialogInterface.OnClickListener aboutListener =
180 new DialogInterface.OnClickListener() {
181 public void onClick(DialogInterface dialogInterface, int i) {
182 Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
183 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
184 startActivity(intent);
188 ViewfinderView getViewfinderView() {
189 return viewfinderView;
192 public Handler getHandler() {
197 public void onCreate(Bundle icicle) {
198 super.onCreate(icicle);
200 Window window = getWindow();
201 window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
202 setContentView(R.layout.capture);
204 CameraManager.init(getApplication());
205 viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
206 resultView = findViewById(R.id.result_view);
207 statusView = (TextView) findViewById(R.id.status_view);
211 historyManager = new HistoryManager(this);
212 historyManager.trimHistory();
214 showHelpOnFirstLaunch();
218 protected void onResume() {
222 SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
223 SurfaceHolder surfaceHolder = surfaceView.getHolder();
225 // The activity was paused but not stopped, so the surface still exists. Therefore
226 // surfaceCreated() won't be called, so init the camera here.
227 initCamera(surfaceHolder);
229 // Install the callback and wait for surfaceCreated() to init the camera.
230 surfaceHolder.addCallback(this);
231 surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
234 Intent intent = getIntent();
235 String action = intent == null ? null : intent.getAction();
236 String dataString = intent == null ? null : intent.getDataString();
237 if (intent != null && action != null) {
238 if (action.equals(Intents.Scan.ACTION)) {
239 // Scan the formats the intent requested, and return the result to the calling activity.
240 source = Source.NATIVE_APP_INTENT;
241 decodeFormats = parseDecodeFormats(intent);
242 } else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
243 dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
244 // Scan only products and send the result to mobile Product Search.
245 source = Source.PRODUCT_SEARCH_LINK;
246 sourceUrl = dataString;
247 decodeFormats = PRODUCT_FORMATS;
248 } else if (dataString != null && dataString.startsWith(ZXING_URL)) {
249 // Scan formats requested in query string (all formats if none specified).
250 // If a return URL is specified, send the results there. Otherwise, handle it ourselves.
251 source = Source.ZXING_LINK;
252 sourceUrl = dataString;
253 Uri inputUri = Uri.parse(sourceUrl);
254 returnUrlTemplate = inputUri.getQueryParameter(RETURN_URL_PARAM);
255 decodeFormats = parseDecodeFormats(inputUri);
257 // Scan all formats and handle the results ourselves (launched from Home).
258 source = Source.NONE;
259 decodeFormats = null;
261 characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
263 source = Source.NONE;
264 decodeFormats = null;
268 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
269 playBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
271 // See if sound settings overrides this
272 AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
273 if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
277 vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
278 copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
282 private static Vector<BarcodeFormat> parseDecodeFormats(Intent intent) {
283 List<String> scanFormats = null;
284 String scanFormatsString = intent.getStringExtra(Intents.Scan.SCAN_FORMATS);
285 if (scanFormatsString != null) {
286 scanFormats = Arrays.asList(COMMA_PATTERN.split(scanFormatsString));
288 return parseDecodeFormats(scanFormats, intent.getStringExtra(Intents.Scan.MODE));
291 private static Vector<BarcodeFormat> parseDecodeFormats(Uri inputUri) {
292 List<String> formats = inputUri.getQueryParameters(Intents.Scan.SCAN_FORMATS);
293 if (formats != null && formats.size() == 1 && formats.get(0) != null){
294 formats = Arrays.asList(COMMA_PATTERN.split(formats.get(0)));
296 return parseDecodeFormats(formats, inputUri.getQueryParameter(Intents.Scan.MODE));
299 private static Vector<BarcodeFormat> parseDecodeFormats(List<String> scanFormats,
301 if (scanFormats != null) {
302 Vector<BarcodeFormat> formats = new Vector<BarcodeFormat>();
304 for (String format : scanFormats) {
305 formats.add(BarcodeFormat.valueOf(format));
308 } catch (IllegalArgumentException iae) {
312 if (decodeMode != null) {
313 if (Intents.Scan.PRODUCT_MODE.equals(decodeMode)) {
314 return PRODUCT_FORMATS;
316 if (Intents.Scan.QR_CODE_MODE.equals(decodeMode)) {
317 return QR_CODE_FORMATS;
319 if (Intents.Scan.ONE_D_MODE.equals(decodeMode)) {
320 return ONE_D_FORMATS;
327 protected void onPause() {
329 if (handler != null) {
330 handler.quitSynchronously();
333 CameraManager.get().closeDriver();
337 public boolean onKeyDown(int keyCode, KeyEvent event) {
338 if (keyCode == KeyEvent.KEYCODE_BACK) {
339 if (source == Source.NATIVE_APP_INTENT) {
340 setResult(RESULT_CANCELED);
343 } else if ((source == Source.NONE || source == Source.ZXING_LINK) && lastResult != null) {
345 if (handler != null) {
346 handler.sendEmptyMessage(R.id.restart_preview);
350 } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
351 // Handle these events so they don't launch the Camera app
354 return super.onKeyDown(keyCode, event);
358 public boolean onCreateOptionsMenu(Menu menu) {
359 super.onCreateOptionsMenu(menu);
360 menu.add(0, SHARE_ID, 0, R.string.menu_share)
361 .setIcon(android.R.drawable.ic_menu_share);
362 menu.add(0, HISTORY_ID, 0, R.string.menu_history)
363 .setIcon(android.R.drawable.ic_menu_recent_history);
364 menu.add(0, SETTINGS_ID, 0, R.string.menu_settings)
365 .setIcon(android.R.drawable.ic_menu_preferences);
366 menu.add(0, HELP_ID, 0, R.string.menu_help)
367 .setIcon(android.R.drawable.ic_menu_help);
368 menu.add(0, ABOUT_ID, 0, R.string.menu_about)
369 .setIcon(android.R.drawable.ic_menu_info_details);
373 // Don't display the share menu item if the result overlay is showing.
375 public boolean onPrepareOptionsMenu(Menu menu) {
376 super.onPrepareOptionsMenu(menu);
377 menu.findItem(SHARE_ID).setVisible(lastResult == null);
382 public boolean onOptionsItemSelected(MenuItem item) {
383 switch (item.getItemId()) {
385 Intent intent = new Intent(Intent.ACTION_VIEW);
386 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
387 intent.setClassName(this, ShareActivity.class.getName());
388 startActivity(intent);
392 AlertDialog historyAlert = historyManager.buildAlert();
397 Intent intent = new Intent(Intent.ACTION_VIEW);
398 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
399 intent.setClassName(this, PreferencesActivity.class.getName());
400 startActivity(intent);
404 Intent intent = new Intent(Intent.ACTION_VIEW);
405 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
406 intent.setClassName(this, HelpActivity.class.getName());
407 startActivity(intent);
411 AlertDialog.Builder builder = new AlertDialog.Builder(this);
412 builder.setTitle(getString(R.string.title_about) + versionName);
413 builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
414 builder.setIcon(R.drawable.launcher_icon);
415 builder.setPositiveButton(R.string.button_open_browser, aboutListener);
416 builder.setNegativeButton(R.string.button_cancel, null);
420 return super.onOptionsItemSelected(item);
424 public void onConfigurationChanged(Configuration config) {
425 // Do nothing, this is to prevent the activity from being restarted when the keyboard opens.
426 super.onConfigurationChanged(config);
429 public void surfaceCreated(SurfaceHolder holder) {
436 public void surfaceDestroyed(SurfaceHolder holder) {
440 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
445 * A valid barcode has been found, so give an indication of success and show the results.
447 * @param rawResult The contents of the barcode.
448 * @param barcode A greyscale bitmap of the camera data which was decoded.
450 public void handleDecode(Result rawResult, Bitmap barcode) {
451 lastResult = rawResult;
452 historyManager.addHistoryItem(rawResult);
453 if (barcode == null) {
454 // This is from history -- no saved barcode
455 handleDecodeInternally(rawResult, null);
457 playBeepSoundAndVibrate();
458 drawResultPoints(barcode, rawResult);
460 case NATIVE_APP_INTENT:
461 case PRODUCT_SEARCH_LINK:
462 handleDecodeExternally(rawResult, barcode);
465 if (returnUrlTemplate == null){
466 handleDecodeInternally(rawResult, barcode);
468 handleDecodeExternally(rawResult, barcode);
472 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
473 if (prefs.getBoolean(PreferencesActivity.KEY_BULK_MODE, false)) {
474 Toast.makeText(this, R.string.msg_bulk_mode_scanned, Toast.LENGTH_SHORT).show();
475 // Wait a moment or else it will scan the same barcode continuously about 3 times
476 if (handler != null) {
477 handler.sendEmptyMessageDelayed(R.id.restart_preview, BULK_MODE_SCAN_DELAY_MS);
481 handleDecodeInternally(rawResult, barcode);
489 * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
491 * @param barcode A bitmap of the captured image.
492 * @param rawResult The decoded results which contains the points to draw.
494 private void drawResultPoints(Bitmap barcode, Result rawResult) {
495 ResultPoint[] points = rawResult.getResultPoints();
496 if (points != null && points.length > 0) {
497 Canvas canvas = new Canvas(barcode);
498 Paint paint = new Paint();
499 paint.setColor(getResources().getColor(R.color.result_image_border));
500 paint.setStrokeWidth(3.0f);
501 paint.setStyle(Paint.Style.STROKE);
502 Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
503 canvas.drawRect(border, paint);
505 paint.setColor(getResources().getColor(R.color.result_points));
506 if (points.length == 2) {
507 paint.setStrokeWidth(4.0f);
508 canvas.drawLine(points[0].getX(), points[0].getY(), points[1].getX(),
509 points[1].getY(), paint);
511 paint.setStrokeWidth(10.0f);
512 for (ResultPoint point : points) {
513 canvas.drawPoint(point.getX(), point.getY(), paint);
519 // Put up our own UI for how to handle the decoded contents.
520 private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
521 statusView.setVisibility(View.GONE);
522 viewfinderView.setVisibility(View.GONE);
523 resultView.setVisibility(View.VISIBLE);
525 ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
526 if (barcode == null) {
527 barcodeImageView.setImageResource(R.drawable.launcher_icon_large);
529 barcodeImageView.setImageBitmap(barcode);
531 barcodeImageView.setVisibility(View.VISIBLE);
533 TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
534 formatTextView.setText(rawResult.getBarcodeFormat().toString());
536 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
537 TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
538 typeTextView.setText(resultHandler.getType().toString());
540 DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
541 String formattedTime = formatter.format(new Date(rawResult.getTimestamp()));
542 TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
543 timeTextView.setText(formattedTime);
546 TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
547 View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
548 metaTextView.setVisibility(View.GONE);
549 metaTextViewLabel.setVisibility(View.GONE);
550 Map<ResultMetadataType,Object> metadata =
551 (Map<ResultMetadataType,Object>) rawResult.getResultMetadata();
552 if (metadata != null) {
553 StringBuilder metadataText = new StringBuilder(20);
554 for (Map.Entry<ResultMetadataType,Object> entry : metadata.entrySet()) {
555 if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
556 metadataText.append(entry.getValue()).append('\n');
559 if (metadataText.length() > 0) {
560 metadataText.setLength(metadataText.length() - 1);
561 metaTextView.setText(metadataText);
562 metaTextView.setVisibility(View.VISIBLE);
563 metaTextViewLabel.setVisibility(View.VISIBLE);
567 TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
568 CharSequence displayContents = resultHandler.getDisplayContents();
569 contentsTextView.setText(displayContents);
570 // Crudely scale betweeen 22 and 32 -- bigger font for shorter text
571 int scaledSize = Math.max(22, 32 - displayContents.length() / 4);
572 contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);
574 int buttonCount = resultHandler.getButtonCount();
575 ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
576 buttonView.requestFocus();
577 for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
578 TextView button = (TextView) buttonView.getChildAt(x);
579 if (x < buttonCount) {
580 button.setVisibility(View.VISIBLE);
581 button.setText(resultHandler.getButtonText(x));
582 button.setOnClickListener(new ResultButtonListener(resultHandler, x));
584 button.setVisibility(View.GONE);
588 if (copyToClipboard) {
589 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
590 clipboard.setText(displayContents);
594 // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
595 private void handleDecodeExternally(Result rawResult, Bitmap barcode) {
596 viewfinderView.drawResultBitmap(barcode);
598 // Since this message will only be shown for a second, just tell the user what kind of
599 // barcode was found (e.g. contact info) rather than the full contents, which they won't
600 // have time to read.
601 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
602 statusView.setText(getString(resultHandler.getDisplayTitle()));
604 if (copyToClipboard) {
605 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
606 clipboard.setText(resultHandler.getDisplayContents());
609 if (source == Source.NATIVE_APP_INTENT) {
610 // Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION when
611 // the deprecated intent is retired.
612 Intent intent = new Intent(getIntent().getAction());
613 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
614 intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
615 intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
616 Message message = Message.obtain(handler, R.id.return_scan_result);
617 message.obj = intent;
618 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
619 } else if (source == Source.PRODUCT_SEARCH_LINK) {
620 // Reformulate the URL which triggered us into a query, so that the request goes to the same
621 // TLD as the scan URL.
622 Message message = Message.obtain(handler, R.id.launch_product_query);
623 int end = sourceUrl.lastIndexOf("/scan");
624 message.obj = sourceUrl.substring(0, end) + "?q=" +
625 resultHandler.getDisplayContents().toString() + "&source=zxing";
626 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
627 } else if (source == Source.ZXING_LINK) {
628 // Replace each occurrence of RETURN_CODE_PLACEHOLDER in the returnUrlTemplate
629 // with the scanned code. This allows both queries and REST-style URLs to work.
630 Message message = Message.obtain(handler, R.id.launch_product_query);
631 message.obj = returnUrlTemplate.replace(RETURN_CODE_PLACEHOLDER,
632 resultHandler.getDisplayContents().toString());
633 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
638 * We want the help screen to be shown automatically the first time a new version of the app is
639 * run. The easiest way to do this is to check android:versionCode from the manifest, and compare
640 * it to a value stored as a preference.
642 private boolean showHelpOnFirstLaunch() {
644 PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
645 int currentVersion = info.versionCode;
646 // Since we're paying to talk to the PackageManager anyway, it makes sense to cache the app
647 // version name here for display in the about box later.
648 this.versionName = info.versionName;
649 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
650 int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
651 if (currentVersion > lastVersion) {
652 prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit();
653 Intent intent = new Intent(this, HelpActivity.class);
654 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
655 // Show the default page on a clean install, and the what's new page on an upgrade.
656 String page = (lastVersion == 0) ? HelpActivity.DEFAULT_PAGE : HelpActivity.WHATS_NEW_PAGE;
657 intent.putExtra(HelpActivity.REQUESTED_PAGE_KEY, page);
658 startActivity(intent);
661 } catch (PackageManager.NameNotFoundException e) {
668 * Creates the beep MediaPlayer in advance so that the sound can be triggered with the least
671 private void initBeepSound() {
672 if (playBeep && mediaPlayer == null) {
673 // The volume on STREAM_SYSTEM is not adjustable, and users found it too loud,
674 // so we now play on the music stream.
675 setVolumeControlStream(AudioManager.STREAM_MUSIC);
676 mediaPlayer = new MediaPlayer();
677 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
678 mediaPlayer.setOnCompletionListener(beepListener);
680 AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
682 mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
685 mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
686 mediaPlayer.prepare();
687 } catch (IOException e) {
693 private void playBeepSoundAndVibrate() {
694 if (playBeep && mediaPlayer != null) {
698 Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
699 vibrator.vibrate(VIBRATE_DURATION);
703 private void initCamera(SurfaceHolder surfaceHolder) {
705 CameraManager.get().openDriver(surfaceHolder);
706 } catch (IOException ioe) {
708 displayFrameworkBugMessageAndExit();
710 } catch (RuntimeException e) {
711 // Barcode Scanner has seen crashes in the wild of this variety:
712 // java.?lang.?RuntimeException: Fail to connect to camera service
713 Log.w(TAG, "Unexpected error initializating camera", e);
714 displayFrameworkBugMessageAndExit();
717 if (handler == null) {
718 handler = new CaptureActivityHandler(this, decodeFormats, characterSet);
722 private void displayFrameworkBugMessageAndExit() {
723 AlertDialog.Builder builder = new AlertDialog.Builder(this);
724 builder.setTitle(getString(R.string.app_name));
725 builder.setMessage(getString(R.string.msg_camera_framework_bug));
726 builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() {
727 public void onClick(DialogInterface dialogInterface, int i) {
734 private void resetStatusView() {
735 resultView.setVisibility(View.GONE);
736 statusView.setText(R.string.msg_default_status);
737 statusView.setVisibility(View.VISIBLE);
738 viewfinderView.setVisibility(View.VISIBLE);
742 public void drawViewfinder() {
743 viewfinderView.drawViewfinder();