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 android.util.TypedValue;
20 import com.google.zxing.BarcodeFormat;
21 import com.google.zxing.Result;
22 import com.google.zxing.ResultMetadataType;
23 import com.google.zxing.ResultPoint;
24 import com.google.zxing.client.android.camera.CameraManager;
25 import com.google.zxing.client.android.history.HistoryManager;
26 import com.google.zxing.client.android.result.ResultButtonListener;
27 import com.google.zxing.client.android.result.ResultHandler;
28 import com.google.zxing.client.android.result.ResultHandlerFactory;
29 import com.google.zxing.client.android.share.ShareActivity;
31 import android.app.Activity;
32 import android.app.AlertDialog;
33 import android.content.DialogInterface;
34 import android.content.Intent;
35 import android.content.SharedPreferences;
36 import android.content.pm.PackageInfo;
37 import android.content.pm.PackageManager;
38 import android.content.res.AssetFileDescriptor;
39 import android.content.res.Configuration;
40 import android.graphics.Bitmap;
41 import android.graphics.Canvas;
42 import android.graphics.Paint;
43 import android.graphics.Rect;
44 import android.media.AudioManager;
45 import android.media.MediaPlayer;
46 import android.media.MediaPlayer.OnCompletionListener;
47 import android.net.Uri;
48 import android.os.Bundle;
49 import android.os.Handler;
50 import android.os.Message;
51 import android.os.Vibrator;
52 import android.preference.PreferenceManager;
53 import android.text.ClipboardManager;
54 import android.util.Log;
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;
67 import java.io.IOException;
68 import java.text.DateFormat;
69 import java.util.Arrays;
70 import java.util.HashSet;
71 import java.util.List;
72 import java.util.Date;
75 import java.util.Vector;
76 import java.util.regex.Pattern;
79 * The barcode reader activity itself. This is loosely based on the CameraPreview
80 * example included in the Android SDK.
82 * @author dswitkin@google.com (Daniel Switkin)
84 public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
86 private static final String TAG = CaptureActivity.class.getSimpleName();
88 private static final Pattern COMMA_PATTERN = Pattern.compile(",");
90 private static final int SHARE_ID = Menu.FIRST;
91 private static final int HISTORY_ID = Menu.FIRST + 1;
92 private static final int SETTINGS_ID = Menu.FIRST + 2;
93 private static final int HELP_ID = Menu.FIRST + 3;
94 private static final int ABOUT_ID = Menu.FIRST + 4;
96 private static final long INTENT_RESULT_DURATION = 1500L;
97 private static final float BEEP_VOLUME = 0.10f;
98 private static final long VIBRATE_DURATION = 200L;
100 private static final String PACKAGE_NAME = "com.google.zxing.client.android";
101 private static final String PRODUCT_SEARCH_URL_PREFIX = "http://www.google";
102 private static final String PRODUCT_SEARCH_URL_SUFFIX = "/m/products/scan";
103 private static final String ZXING_URL = "http://zxing.appspot.com/scan";
104 private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
105 private static final String RETURN_URL_PARAM = "ret";
107 static final Vector<BarcodeFormat> PRODUCT_FORMATS;
108 static final Vector<BarcodeFormat> ONE_D_FORMATS;
109 static final Vector<BarcodeFormat> QR_CODE_FORMATS;
110 static final Vector<BarcodeFormat> ALL_FORMATS;
113 PRODUCT_FORMATS = new Vector<BarcodeFormat>(5);
114 PRODUCT_FORMATS.add(BarcodeFormat.UPC_A);
115 PRODUCT_FORMATS.add(BarcodeFormat.UPC_E);
116 PRODUCT_FORMATS.add(BarcodeFormat.EAN_13);
117 PRODUCT_FORMATS.add(BarcodeFormat.EAN_8);
118 PRODUCT_FORMATS.add(BarcodeFormat.RSS14);
119 ONE_D_FORMATS = new Vector<BarcodeFormat>(PRODUCT_FORMATS.size() + 3);
120 ONE_D_FORMATS.addAll(PRODUCT_FORMATS);
121 ONE_D_FORMATS.add(BarcodeFormat.CODE_39);
122 ONE_D_FORMATS.add(BarcodeFormat.CODE_93);
123 ONE_D_FORMATS.add(BarcodeFormat.CODE_128);
124 ONE_D_FORMATS.add(BarcodeFormat.ITF);
125 QR_CODE_FORMATS = new Vector<BarcodeFormat>(1);
126 QR_CODE_FORMATS.add(BarcodeFormat.QR_CODE);
127 ALL_FORMATS = new Vector<BarcodeFormat>(ONE_D_FORMATS.size() + QR_CODE_FORMATS.size());
128 ALL_FORMATS.addAll(ONE_D_FORMATS);
129 ALL_FORMATS.addAll(QR_CODE_FORMATS);
132 private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES;
134 DISPLAYABLE_METADATA_TYPES = new HashSet<ResultMetadataType>(5);
135 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ISSUE_NUMBER);
136 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.SUGGESTED_PRICE);
137 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ERROR_CORRECTION_LEVEL);
138 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.POSSIBLE_COUNTRY);
141 private enum Source {
148 private CaptureActivityHandler handler;
150 private ViewfinderView viewfinderView;
151 private TextView statusView;
152 private View resultView;
153 private MediaPlayer mediaPlayer;
154 private Result lastResult;
155 private boolean hasSurface;
156 private boolean playBeep;
157 private boolean vibrate;
158 private boolean copyToClipboard;
159 private Source source;
160 private String sourceUrl;
161 private String returnUrlTemplate;
162 private Vector<BarcodeFormat> decodeFormats;
163 private String characterSet;
164 private String versionName;
165 private HistoryManager historyManager;
167 private final OnCompletionListener beepListener = new BeepListener();
169 private final DialogInterface.OnClickListener aboutListener =
170 new DialogInterface.OnClickListener() {
171 public void onClick(DialogInterface dialogInterface, int i) {
172 Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
173 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
174 startActivity(intent);
178 ViewfinderView getViewfinderView() {
179 return viewfinderView;
182 public Handler getHandler() {
187 public void onCreate(Bundle icicle) {
188 super.onCreate(icicle);
190 Window window = getWindow();
191 window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
192 setContentView(R.layout.capture);
194 CameraManager.init(getApplication());
195 viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
196 resultView = findViewById(R.id.result_view);
197 statusView = (TextView) findViewById(R.id.status_view);
201 historyManager = new HistoryManager(this);
202 historyManager.trimHistory();
204 showHelpOnFirstLaunch();
208 protected void onResume() {
211 SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
212 SurfaceHolder surfaceHolder = surfaceView.getHolder();
214 // The activity was paused but not stopped, so the surface still exists. Therefore
215 // surfaceCreated() won't be called, so init the camera here.
216 initCamera(surfaceHolder);
218 // Install the callback and wait for surfaceCreated() to init the camera.
219 surfaceHolder.addCallback(this);
220 surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
223 Intent intent = getIntent();
224 String action = intent == null ? null : intent.getAction();
225 String dataString = intent == null ? null : intent.getDataString();
226 if (intent != null && action != null) {
227 if (action.equals(Intents.Scan.ACTION)) {
228 // Scan the formats the intent requested, and return the result to the calling activity.
229 source = Source.NATIVE_APP_INTENT;
230 decodeFormats = parseDecodeFormats(intent);
232 } else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
233 dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
234 // Scan only products and send the result to mobile Product Search.
235 source = Source.PRODUCT_SEARCH_LINK;
236 sourceUrl = dataString;
237 decodeFormats = PRODUCT_FORMATS;
239 } else if (dataString != null && dataString.startsWith(ZXING_URL)) {
240 // Scan formats requested in query string (all formats if none specified).
241 // If a return URL is specified, send the results there. Otherwise, handle the results ourselves.
242 source = Source.ZXING_LINK;
243 sourceUrl = dataString;
244 Uri inputUri = Uri.parse(sourceUrl);
245 returnUrlTemplate = inputUri.getQueryParameter(RETURN_URL_PARAM);
246 decodeFormats = parseDecodeFormats(inputUri);
249 // Scan all formats and handle the results ourselves (launched from Home).
250 source = Source.NONE;
251 decodeFormats = null;
254 characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
256 source = Source.NONE;
257 decodeFormats = null;
259 if (lastResult == null) {
264 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
265 playBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
267 // See if sound settings overrides this
268 AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
269 if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
273 vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
274 copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
278 private static Vector<BarcodeFormat> parseDecodeFormats(Intent intent) {
279 List<String> scanFormats = null;
280 String scanFormatsString = intent.getStringExtra(Intents.Scan.SCAN_FORMATS);
281 if (scanFormatsString != null) {
282 scanFormats = Arrays.asList(COMMA_PATTERN.split(scanFormatsString));
284 return parseDecodeFormats(scanFormats, intent.getStringExtra(Intents.Scan.MODE));
287 private static Vector<BarcodeFormat> parseDecodeFormats(Uri inputUri) {
288 List<String> formats = inputUri.getQueryParameters(Intents.Scan.SCAN_FORMATS);
289 if (formats != null && formats.size() == 1 && formats.get(0) != null){
290 formats = Arrays.asList(COMMA_PATTERN.split(formats.get(0)));
292 return parseDecodeFormats(formats, inputUri.getQueryParameter(Intents.Scan.MODE));
295 private static Vector<BarcodeFormat> parseDecodeFormats(List<String> scanFormats,
297 if (scanFormats != null) {
298 Vector<BarcodeFormat> formats = new Vector<BarcodeFormat>();
300 for (String format : scanFormats) {
301 formats.add(BarcodeFormat.valueOf(format));
304 } catch (IllegalArgumentException iae) {
308 if (decodeMode != null) {
309 if (Intents.Scan.PRODUCT_MODE.equals(decodeMode)) {
310 return PRODUCT_FORMATS;
312 if (Intents.Scan.QR_CODE_MODE.equals(decodeMode)) {
313 return QR_CODE_FORMATS;
315 if (Intents.Scan.ONE_D_MODE.equals(decodeMode)) {
316 return ONE_D_FORMATS;
323 protected void onPause() {
325 if (handler != null) {
326 handler.quitSynchronously();
329 CameraManager.get().closeDriver();
333 public boolean onKeyDown(int keyCode, KeyEvent event) {
334 if (keyCode == KeyEvent.KEYCODE_BACK) {
335 if (source == Source.NATIVE_APP_INTENT) {
336 setResult(RESULT_CANCELED);
339 } else if ((source == Source.NONE || source == Source.ZXING_LINK) && lastResult != null) {
341 if (handler != null) {
342 handler.sendEmptyMessage(R.id.restart_preview);
346 } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
347 // Handle these events so they don't launch the Camera app
350 return super.onKeyDown(keyCode, event);
354 public boolean onCreateOptionsMenu(Menu menu) {
355 super.onCreateOptionsMenu(menu);
356 menu.add(0, SHARE_ID, 0, R.string.menu_share)
357 .setIcon(android.R.drawable.ic_menu_share);
358 menu.add(0, HISTORY_ID, 0, R.string.menu_history)
359 .setIcon(android.R.drawable.ic_menu_recent_history);
360 menu.add(0, SETTINGS_ID, 0, R.string.menu_settings)
361 .setIcon(android.R.drawable.ic_menu_preferences);
362 menu.add(0, HELP_ID, 0, R.string.menu_help)
363 .setIcon(android.R.drawable.ic_menu_help);
364 menu.add(0, ABOUT_ID, 0, R.string.menu_about)
365 .setIcon(android.R.drawable.ic_menu_info_details);
369 // Don't display the share menu item if the result overlay is showing.
371 public boolean onPrepareOptionsMenu(Menu menu) {
372 super.onPrepareOptionsMenu(menu);
373 menu.findItem(SHARE_ID).setVisible(lastResult == null);
378 public boolean onOptionsItemSelected(MenuItem item) {
379 switch (item.getItemId()) {
381 Intent intent = new Intent(Intent.ACTION_VIEW);
382 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
383 intent.setClassName(this, ShareActivity.class.getName());
384 startActivity(intent);
388 AlertDialog historyAlert = historyManager.buildAlert();
393 Intent intent = new Intent(Intent.ACTION_VIEW);
394 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
395 intent.setClassName(this, PreferencesActivity.class.getName());
396 startActivity(intent);
400 Intent intent = new Intent(Intent.ACTION_VIEW);
401 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
402 intent.setClassName(this, HelpActivity.class.getName());
403 startActivity(intent);
407 AlertDialog.Builder builder = new AlertDialog.Builder(this);
408 builder.setTitle(getString(R.string.title_about) + versionName);
409 builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
410 builder.setIcon(R.drawable.launcher_icon);
411 builder.setPositiveButton(R.string.button_open_browser, aboutListener);
412 builder.setNegativeButton(R.string.button_cancel, null);
416 return super.onOptionsItemSelected(item);
420 public void onConfigurationChanged(Configuration config) {
421 // Do nothing, this is to prevent the activity from being restarted when the keyboard opens.
422 super.onConfigurationChanged(config);
425 public void surfaceCreated(SurfaceHolder holder) {
432 public void surfaceDestroyed(SurfaceHolder holder) {
436 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
441 * A valid barcode has been found, so give an indication of success and show the results.
443 * @param rawResult The contents of the barcode.
444 * @param barcode A greyscale bitmap of the camera data which was decoded.
446 public void handleDecode(Result rawResult, Bitmap barcode) {
447 lastResult = rawResult;
448 historyManager.addHistoryItem(rawResult);
449 if (barcode == null) {
450 // This is from history -- no saved barcode
451 handleDecodeInternally(rawResult, null);
453 playBeepSoundAndVibrate();
454 drawResultPoints(barcode, rawResult);
456 case NATIVE_APP_INTENT:
457 case PRODUCT_SEARCH_LINK:
458 handleDecodeExternally(rawResult, barcode);
461 if(returnUrlTemplate == null){
462 handleDecodeInternally(rawResult, barcode);
464 handleDecodeExternally(rawResult, barcode);
468 handleDecodeInternally(rawResult, barcode);
475 * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
477 * @param barcode A bitmap of the captured image.
478 * @param rawResult The decoded results which contains the points to draw.
480 private void drawResultPoints(Bitmap barcode, Result rawResult) {
481 ResultPoint[] points = rawResult.getResultPoints();
482 if (points != null && points.length > 0) {
483 Canvas canvas = new Canvas(barcode);
484 Paint paint = new Paint();
485 paint.setColor(getResources().getColor(R.color.result_image_border));
486 paint.setStrokeWidth(3.0f);
487 paint.setStyle(Paint.Style.STROKE);
488 Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
489 canvas.drawRect(border, paint);
491 paint.setColor(getResources().getColor(R.color.result_points));
492 if (points.length == 2) {
493 paint.setStrokeWidth(4.0f);
494 canvas.drawLine(points[0].getX(), points[0].getY(), points[1].getX(),
495 points[1].getY(), paint);
497 paint.setStrokeWidth(10.0f);
498 for (ResultPoint point : points) {
499 canvas.drawPoint(point.getX(), point.getY(), paint);
505 // Put up our own UI for how to handle the decoded contents.
506 private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
507 statusView.setVisibility(View.GONE);
508 viewfinderView.setVisibility(View.GONE);
509 resultView.setVisibility(View.VISIBLE);
511 ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
512 if (barcode == null) {
513 barcodeImageView.setImageResource(R.drawable.launcher_icon_large);
515 barcodeImageView.setImageBitmap(barcode);
517 barcodeImageView.setVisibility(View.VISIBLE);
519 TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
520 formatTextView.setText(rawResult.getBarcodeFormat().toString());
522 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
523 TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
524 typeTextView.setText(resultHandler.getType().toString());
526 DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
527 String formattedTime = formatter.format(new Date(rawResult.getTimestamp()));
528 TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
529 timeTextView.setText(formattedTime);
532 TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
533 View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
534 metaTextView.setVisibility(View.GONE);
535 metaTextViewLabel.setVisibility(View.GONE);
536 Map<ResultMetadataType,Object> metadata =
537 (Map<ResultMetadataType,Object>) rawResult.getResultMetadata();
538 if (metadata != null) {
539 StringBuilder metadataText = new StringBuilder(20);
540 for (Map.Entry<ResultMetadataType,Object> entry : metadata.entrySet()) {
541 if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
542 metadataText.append(entry.getValue()).append('\n');
545 if (metadataText.length() > 0) {
546 metadataText.setLength(metadataText.length() - 1);
547 metaTextView.setText(metadataText);
548 metaTextView.setVisibility(View.VISIBLE);
549 metaTextViewLabel.setVisibility(View.VISIBLE);
553 TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
554 CharSequence displayContents = resultHandler.getDisplayContents();
555 contentsTextView.setText(displayContents);
556 // Crudely scale betweeen 22 and 36 -- bigger font for shorter text
557 int scaledSize = Math.max(22, 36 - displayContents.length() / 4);
558 contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);
560 int buttonCount = resultHandler.getButtonCount();
561 ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
562 buttonView.requestFocus();
563 for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
564 TextView button = (TextView) buttonView.getChildAt(x);
565 if (x < buttonCount) {
566 button.setVisibility(View.VISIBLE);
567 button.setText(resultHandler.getButtonText(x));
568 button.setOnClickListener(new ResultButtonListener(resultHandler, x));
570 button.setVisibility(View.GONE);
574 if (copyToClipboard) {
575 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
576 clipboard.setText(displayContents);
580 // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
581 private void handleDecodeExternally(Result rawResult, Bitmap barcode) {
582 viewfinderView.drawResultBitmap(barcode);
584 // Since this message will only be shown for a second, just tell the user what kind of
585 // barcode was found (e.g. contact info) rather than the full contents, which they won't
586 // have time to read.
587 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
588 statusView.setText(getString(resultHandler.getDisplayTitle()));
590 if (copyToClipboard) {
591 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
592 clipboard.setText(resultHandler.getDisplayContents());
595 if (source == Source.NATIVE_APP_INTENT) {
596 // Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION when
597 // the deprecated intent is retired.
598 Intent intent = new Intent(getIntent().getAction());
599 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
600 intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
601 intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
602 Message message = Message.obtain(handler, R.id.return_scan_result);
603 message.obj = intent;
604 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
605 } else if (source == Source.PRODUCT_SEARCH_LINK) {
606 // Reformulate the URL which triggered us into a query, so that the request goes to the same
607 // TLD as the scan URL.
608 Message message = Message.obtain(handler, R.id.launch_product_query);
609 int end = sourceUrl.lastIndexOf("/scan");
610 message.obj = sourceUrl.substring(0, end) + "?q=" +
611 resultHandler.getDisplayContents().toString() + "&source=zxing";
612 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
613 } else if (source == Source.ZXING_LINK) {
614 // Replace each occurrence of RETURN_CODE_PLACEHOLDER in the returnUrlTemplate
615 // with the scanned code. This allows both queries and REST-style URLs to work.
616 Message message = Message.obtain(handler, R.id.launch_product_query);
617 message.obj = returnUrlTemplate.replace(RETURN_CODE_PLACEHOLDER, resultHandler.getDisplayContents().toString());
618 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
623 * We want the help screen to be shown automatically the first time a new version of the app is
624 * run. The easiest way to do this is to check android:versionCode from the manifest, and compare
625 * it to a value stored as a preference.
627 private boolean showHelpOnFirstLaunch() {
629 PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
630 int currentVersion = info.versionCode;
631 // Since we're paying to talk to the PackageManager anyway, it makes sense to cache the app
632 // version name here for display in the about box later.
633 this.versionName = info.versionName;
634 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
635 int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
636 if (currentVersion > lastVersion) {
637 prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit();
638 Intent intent = new Intent(this, HelpActivity.class);
639 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
640 // Show the default page on a clean install, and the what's new page on an upgrade.
641 String page = (lastVersion == 0) ? HelpActivity.DEFAULT_PAGE : HelpActivity.WHATS_NEW_PAGE;
642 intent.putExtra(HelpActivity.REQUESTED_PAGE_KEY, page);
643 startActivity(intent);
646 } catch (PackageManager.NameNotFoundException e) {
653 * Creates the beep MediaPlayer in advance so that the sound can be triggered with the least
656 private void initBeepSound() {
657 if (playBeep && mediaPlayer == null) {
658 // The volume on STREAM_SYSTEM is not adjustable, and users found it too loud,
659 // so we now play on the music stream.
660 setVolumeControlStream(AudioManager.STREAM_MUSIC);
661 mediaPlayer = new MediaPlayer();
662 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
663 mediaPlayer.setOnCompletionListener(beepListener);
665 AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
667 mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
670 mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
671 mediaPlayer.prepare();
672 } catch (IOException e) {
678 private void playBeepSoundAndVibrate() {
679 if (playBeep && mediaPlayer != null) {
683 Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
684 vibrator.vibrate(VIBRATE_DURATION);
688 private void initCamera(SurfaceHolder surfaceHolder) {
690 CameraManager.get().openDriver(surfaceHolder);
691 } catch (IOException ioe) {
693 displayFrameworkBugMessageAndExit();
695 } catch (RuntimeException e) {
696 // Barcode Scanner has seen crashes in the wild of this variety:
697 // java.?lang.?RuntimeException: Fail to connect to camera service
698 Log.w(TAG, "Unexpected error initializating camera", e);
699 displayFrameworkBugMessageAndExit();
702 if (handler == null) {
703 boolean beginScanning = lastResult == null;
704 handler = new CaptureActivityHandler(this, decodeFormats, characterSet, beginScanning);
708 private void displayFrameworkBugMessageAndExit() {
709 AlertDialog.Builder builder = new AlertDialog.Builder(this);
710 builder.setTitle(getString(R.string.app_name));
711 builder.setMessage(getString(R.string.msg_camera_framework_bug));
712 builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() {
713 public void onClick(DialogInterface dialogInterface, int i) {
720 private void resetStatusView() {
721 resultView.setVisibility(View.GONE);
722 statusView.setText(R.string.msg_default_status);
723 statusView.setVisibility(View.VISIBLE);
724 viewfinderView.setVisibility(View.VISIBLE);
728 public void drawViewfinder() {
729 viewfinderView.drawViewfinder();
733 * When the beep has finished playing, rewind to queue up another one.
735 private static class BeepListener implements OnCompletionListener {
736 public void onCompletion(MediaPlayer mediaPlayer) {
737 mediaPlayer.seekTo(0);