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.BitmapFactory;
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.util.TypedValue;
56 import android.view.KeyEvent;
57 import android.view.Menu;
58 import android.view.MenuItem;
59 import android.view.SurfaceHolder;
60 import android.view.SurfaceView;
61 import android.view.View;
62 import android.view.ViewGroup;
63 import android.view.Window;
64 import android.view.WindowManager;
65 import android.widget.ImageView;
66 import android.widget.TextView;
67 import android.widget.Toast;
69 import java.io.IOException;
70 import java.text.DateFormat;
71 import java.util.Date;
72 import java.util.HashSet;
75 import java.util.Vector;
78 * The barcode reader activity itself. This is loosely based on the CameraPreview
79 * example included in the Android SDK.
81 * @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 int SHARE_ID = Menu.FIRST;
89 private static final int HISTORY_ID = Menu.FIRST + 1;
90 private static final int SETTINGS_ID = Menu.FIRST + 2;
91 private static final int HELP_ID = Menu.FIRST + 3;
92 private static final int ABOUT_ID = Menu.FIRST + 4;
94 private static final long INTENT_RESULT_DURATION = 1500L;
95 private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
96 private static final float BEEP_VOLUME = 0.10f;
97 private static final long VIBRATE_DURATION = 200L;
99 private static final String PACKAGE_NAME = "com.google.zxing.client.android";
100 private static final String PRODUCT_SEARCH_URL_PREFIX = "http://www.google";
101 private static final String PRODUCT_SEARCH_URL_SUFFIX = "/m/products/scan";
102 private static final String ZXING_URL = "http://zxing.appspot.com/scan";
103 private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
104 private static final String RETURN_URL_PARAM = "ret";
106 private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES;
108 DISPLAYABLE_METADATA_TYPES = new HashSet<ResultMetadataType>(5);
109 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ISSUE_NUMBER);
110 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.SUGGESTED_PRICE);
111 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.ERROR_CORRECTION_LEVEL);
112 DISPLAYABLE_METADATA_TYPES.add(ResultMetadataType.POSSIBLE_COUNTRY);
115 private enum Source {
122 private CaptureActivityHandler handler;
124 private ViewfinderView viewfinderView;
125 private TextView statusView;
126 private View resultView;
127 private MediaPlayer mediaPlayer;
128 private Result lastResult;
129 private boolean hasSurface;
130 private boolean playBeep;
131 private boolean vibrate;
132 private boolean copyToClipboard;
133 private Source source;
134 private String sourceUrl;
135 private String returnUrlTemplate;
136 private Vector<BarcodeFormat> decodeFormats;
137 private String characterSet;
138 private String versionName;
139 private HistoryManager historyManager;
140 private InactivityTimer inactivityTimer;
143 * When the beep has finished playing, rewind to queue up another one.
145 private final OnCompletionListener beepListener = new OnCompletionListener() {
146 public void onCompletion(MediaPlayer mediaPlayer) {
147 mediaPlayer.seekTo(0);
151 private final DialogInterface.OnClickListener aboutListener =
152 new DialogInterface.OnClickListener() {
153 public void onClick(DialogInterface dialogInterface, int i) {
154 Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
155 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
156 startActivity(intent);
160 ViewfinderView getViewfinderView() {
161 return viewfinderView;
164 public Handler getHandler() {
169 public void onCreate(Bundle icicle) {
170 super.onCreate(icicle);
172 Window window = getWindow();
173 window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
174 setContentView(R.layout.capture);
176 CameraManager.init(getApplication());
177 viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
178 resultView = findViewById(R.id.result_view);
179 statusView = (TextView) findViewById(R.id.status_view);
183 historyManager = new HistoryManager(this);
184 historyManager.trimHistory();
185 inactivityTimer = new InactivityTimer(this);
187 showHelpOnFirstLaunch();
191 protected void onResume() {
195 SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
196 SurfaceHolder surfaceHolder = surfaceView.getHolder();
198 // The activity was paused but not stopped, so the surface still exists. Therefore
199 // surfaceCreated() won't be called, so init the camera here.
200 initCamera(surfaceHolder);
202 // Install the callback and wait for surfaceCreated() to init the camera.
203 surfaceHolder.addCallback(this);
204 surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
207 Intent intent = getIntent();
208 String action = intent == null ? null : intent.getAction();
209 String dataString = intent == null ? null : intent.getDataString();
210 if (intent != null && action != null) {
211 if (action.equals(Intents.Scan.ACTION)) {
212 // Scan the formats the intent requested, and return the result to the calling activity.
213 source = Source.NATIVE_APP_INTENT;
214 decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);
215 } else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
216 dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
217 // Scan only products and send the result to mobile Product Search.
218 source = Source.PRODUCT_SEARCH_LINK;
219 sourceUrl = dataString;
220 decodeFormats = DecodeFormatManager.PRODUCT_FORMATS;
221 } else if (dataString != null && dataString.startsWith(ZXING_URL)) {
222 // Scan formats requested in query string (all formats if none specified).
223 // If a return URL is specified, send the results there. Otherwise, handle it ourselves.
224 source = Source.ZXING_LINK;
225 sourceUrl = dataString;
226 Uri inputUri = Uri.parse(sourceUrl);
227 returnUrlTemplate = inputUri.getQueryParameter(RETURN_URL_PARAM);
228 decodeFormats = DecodeFormatManager.parseDecodeFormats(inputUri);
230 // Scan all formats and handle the results ourselves (launched from Home).
231 source = Source.NONE;
232 decodeFormats = null;
234 characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
236 source = Source.NONE;
237 decodeFormats = null;
241 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
242 playBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
244 // See if sound settings overrides this
245 AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
246 if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
250 vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
251 copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
256 protected void onPause() {
258 if (handler != null) {
259 handler.quitSynchronously();
262 CameraManager.get().closeDriver();
266 protected void onDestroy() {
267 inactivityTimer.shutdown();
272 public boolean onKeyDown(int keyCode, KeyEvent event) {
273 if (keyCode == KeyEvent.KEYCODE_BACK) {
274 if (source == Source.NATIVE_APP_INTENT) {
275 setResult(RESULT_CANCELED);
278 } else if ((source == Source.NONE || source == Source.ZXING_LINK) && lastResult != null) {
280 if (handler != null) {
281 handler.sendEmptyMessage(R.id.restart_preview);
285 } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
286 // Handle these events so they don't launch the Camera app
289 return super.onKeyDown(keyCode, event);
293 public boolean onCreateOptionsMenu(Menu menu) {
294 super.onCreateOptionsMenu(menu);
295 menu.add(0, SHARE_ID, 0, R.string.menu_share)
296 .setIcon(android.R.drawable.ic_menu_share);
297 menu.add(0, HISTORY_ID, 0, R.string.menu_history)
298 .setIcon(android.R.drawable.ic_menu_recent_history);
299 menu.add(0, SETTINGS_ID, 0, R.string.menu_settings)
300 .setIcon(android.R.drawable.ic_menu_preferences);
301 menu.add(0, HELP_ID, 0, R.string.menu_help)
302 .setIcon(android.R.drawable.ic_menu_help);
303 menu.add(0, ABOUT_ID, 0, R.string.menu_about)
304 .setIcon(android.R.drawable.ic_menu_info_details);
308 // Don't display the share menu item if the result overlay is showing.
310 public boolean onPrepareOptionsMenu(Menu menu) {
311 super.onPrepareOptionsMenu(menu);
312 menu.findItem(SHARE_ID).setVisible(lastResult == null);
317 public boolean onOptionsItemSelected(MenuItem item) {
318 switch (item.getItemId()) {
320 Intent intent = new Intent(Intent.ACTION_VIEW);
321 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
322 intent.setClassName(this, ShareActivity.class.getName());
323 startActivity(intent);
327 AlertDialog historyAlert = historyManager.buildAlert();
332 Intent intent = new Intent(Intent.ACTION_VIEW);
333 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
334 intent.setClassName(this, PreferencesActivity.class.getName());
335 startActivity(intent);
339 Intent intent = new Intent(Intent.ACTION_VIEW);
340 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
341 intent.setClassName(this, HelpActivity.class.getName());
342 startActivity(intent);
346 AlertDialog.Builder builder = new AlertDialog.Builder(this);
347 builder.setTitle(getString(R.string.title_about) + versionName);
348 builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
349 builder.setIcon(R.drawable.launcher_icon);
350 builder.setPositiveButton(R.string.button_open_browser, aboutListener);
351 builder.setNegativeButton(R.string.button_cancel, null);
355 return super.onOptionsItemSelected(item);
359 public void onConfigurationChanged(Configuration config) {
360 // Do nothing, this is to prevent the activity from being restarted when the keyboard opens.
361 super.onConfigurationChanged(config);
364 public void surfaceCreated(SurfaceHolder holder) {
371 public void surfaceDestroyed(SurfaceHolder holder) {
375 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
380 * A valid barcode has been found, so give an indication of success and show the results.
382 * @param rawResult The contents of the barcode.
383 * @param barcode A greyscale bitmap of the camera data which was decoded.
385 public void handleDecode(Result rawResult, Bitmap barcode) {
386 inactivityTimer.onActivity();
387 lastResult = rawResult;
388 historyManager.addHistoryItem(rawResult);
389 if (barcode == null) {
390 // This is from history -- no saved barcode
391 handleDecodeInternally(rawResult, null);
393 playBeepSoundAndVibrate();
394 drawResultPoints(barcode, rawResult);
396 case NATIVE_APP_INTENT:
397 case PRODUCT_SEARCH_LINK:
398 handleDecodeExternally(rawResult, barcode);
401 if (returnUrlTemplate == null){
402 handleDecodeInternally(rawResult, barcode);
404 handleDecodeExternally(rawResult, barcode);
408 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
409 if (prefs.getBoolean(PreferencesActivity.KEY_BULK_MODE, false)) {
410 Toast.makeText(this, R.string.msg_bulk_mode_scanned, Toast.LENGTH_SHORT).show();
411 // Wait a moment or else it will scan the same barcode continuously about 3 times
412 if (handler != null) {
413 handler.sendEmptyMessageDelayed(R.id.restart_preview, BULK_MODE_SCAN_DELAY_MS);
417 handleDecodeInternally(rawResult, barcode);
425 * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
427 * @param barcode A bitmap of the captured image.
428 * @param rawResult The decoded results which contains the points to draw.
430 private void drawResultPoints(Bitmap barcode, Result rawResult) {
431 ResultPoint[] points = rawResult.getResultPoints();
432 if (points != null && points.length > 0) {
433 Canvas canvas = new Canvas(barcode);
434 Paint paint = new Paint();
435 paint.setColor(getResources().getColor(R.color.result_image_border));
436 paint.setStrokeWidth(3.0f);
437 paint.setStyle(Paint.Style.STROKE);
438 Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
439 canvas.drawRect(border, paint);
441 paint.setColor(getResources().getColor(R.color.result_points));
442 if (points.length == 2) {
443 paint.setStrokeWidth(4.0f);
444 drawLine(canvas, paint, points[0], points[1]);
445 } else if (points.length == 4 &&
446 (rawResult.getBarcodeFormat().equals(BarcodeFormat.UPC_A)) ||
447 (rawResult.getBarcodeFormat().equals(BarcodeFormat.EAN_13))) {
448 // Hacky special case -- draw two lines, for the barcode and metadata
449 drawLine(canvas, paint, points[0], points[1]);
450 drawLine(canvas, paint, points[2], points[3]);
452 paint.setStrokeWidth(10.0f);
453 for (ResultPoint point : points) {
454 canvas.drawPoint(point.getX(), point.getY(), paint);
460 private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
461 canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
464 // Put up our own UI for how to handle the decoded contents.
465 private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
466 statusView.setVisibility(View.GONE);
467 viewfinderView.setVisibility(View.GONE);
468 resultView.setVisibility(View.VISIBLE);
470 ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
471 if (barcode == null) {
472 barcodeImageView.setImageBitmap(BitmapFactory.decodeResource(getResources(),
473 R.drawable.launcher_icon));
475 barcodeImageView.setImageBitmap(barcode);
478 TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
479 formatTextView.setText(rawResult.getBarcodeFormat().toString());
481 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
482 TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
483 typeTextView.setText(resultHandler.getType().toString());
485 DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
486 String formattedTime = formatter.format(new Date(rawResult.getTimestamp()));
487 TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
488 timeTextView.setText(formattedTime);
491 TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
492 View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
493 metaTextView.setVisibility(View.GONE);
494 metaTextViewLabel.setVisibility(View.GONE);
495 Map<ResultMetadataType,Object> metadata =
496 (Map<ResultMetadataType,Object>) rawResult.getResultMetadata();
497 if (metadata != null) {
498 StringBuilder metadataText = new StringBuilder(20);
499 for (Map.Entry<ResultMetadataType,Object> entry : metadata.entrySet()) {
500 if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
501 metadataText.append(entry.getValue()).append('\n');
504 if (metadataText.length() > 0) {
505 metadataText.setLength(metadataText.length() - 1);
506 metaTextView.setText(metadataText);
507 metaTextView.setVisibility(View.VISIBLE);
508 metaTextViewLabel.setVisibility(View.VISIBLE);
512 TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
513 CharSequence displayContents = resultHandler.getDisplayContents();
514 contentsTextView.setText(displayContents);
515 // Crudely scale betweeen 22 and 32 -- bigger font for shorter text
516 int scaledSize = Math.max(22, 32 - displayContents.length() / 4);
517 contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);
519 int buttonCount = resultHandler.getButtonCount();
520 ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
521 buttonView.requestFocus();
522 for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
523 TextView button = (TextView) buttonView.getChildAt(x);
524 if (x < buttonCount) {
525 button.setVisibility(View.VISIBLE);
526 button.setText(resultHandler.getButtonText(x));
527 button.setOnClickListener(new ResultButtonListener(resultHandler, x));
529 button.setVisibility(View.GONE);
533 if (copyToClipboard) {
534 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
535 clipboard.setText(displayContents);
539 // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
540 private void handleDecodeExternally(Result rawResult, Bitmap barcode) {
541 viewfinderView.drawResultBitmap(barcode);
543 // Since this message will only be shown for a second, just tell the user what kind of
544 // barcode was found (e.g. contact info) rather than the full contents, which they won't
545 // have time to read.
546 ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
547 statusView.setText(getString(resultHandler.getDisplayTitle()));
549 if (copyToClipboard) {
550 ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
551 clipboard.setText(resultHandler.getDisplayContents());
554 if (source == Source.NATIVE_APP_INTENT) {
555 // Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION when
556 // the deprecated intent is retired.
557 Intent intent = new Intent(getIntent().getAction());
558 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
559 intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
560 intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
561 Message message = Message.obtain(handler, R.id.return_scan_result);
562 message.obj = intent;
563 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
564 } else if (source == Source.PRODUCT_SEARCH_LINK) {
565 // Reformulate the URL which triggered us into a query, so that the request goes to the same
566 // TLD as the scan URL.
567 Message message = Message.obtain(handler, R.id.launch_product_query);
568 int end = sourceUrl.lastIndexOf("/scan");
569 message.obj = sourceUrl.substring(0, end) + "?q=" +
570 resultHandler.getDisplayContents().toString() + "&source=zxing";
571 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
572 } else if (source == Source.ZXING_LINK) {
573 // Replace each occurrence of RETURN_CODE_PLACEHOLDER in the returnUrlTemplate
574 // with the scanned code. This allows both queries and REST-style URLs to work.
575 Message message = Message.obtain(handler, R.id.launch_product_query);
576 message.obj = returnUrlTemplate.replace(RETURN_CODE_PLACEHOLDER,
577 resultHandler.getDisplayContents().toString());
578 handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
583 * We want the help screen to be shown automatically the first time a new version of the app is
584 * run. The easiest way to do this is to check android:versionCode from the manifest, and compare
585 * it to a value stored as a preference.
587 private boolean showHelpOnFirstLaunch() {
589 PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
590 int currentVersion = info.versionCode;
591 // Since we're paying to talk to the PackageManager anyway, it makes sense to cache the app
592 // version name here for display in the about box later.
593 this.versionName = info.versionName;
594 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
595 int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
596 if (currentVersion > lastVersion) {
597 prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit();
598 Intent intent = new Intent(this, HelpActivity.class);
599 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
600 // Show the default page on a clean install, and the what's new page on an upgrade.
601 String page = (lastVersion == 0) ? HelpActivity.DEFAULT_PAGE : HelpActivity.WHATS_NEW_PAGE;
602 intent.putExtra(HelpActivity.REQUESTED_PAGE_KEY, page);
603 startActivity(intent);
606 } catch (PackageManager.NameNotFoundException e) {
613 * Creates the beep MediaPlayer in advance so that the sound can be triggered with the least
616 private void initBeepSound() {
617 if (playBeep && mediaPlayer == null) {
618 // The volume on STREAM_SYSTEM is not adjustable, and users found it too loud,
619 // so we now play on the music stream.
620 setVolumeControlStream(AudioManager.STREAM_MUSIC);
621 mediaPlayer = new MediaPlayer();
622 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
623 mediaPlayer.setOnCompletionListener(beepListener);
625 AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
627 mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
630 mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
631 mediaPlayer.prepare();
632 } catch (IOException e) {
638 private void playBeepSoundAndVibrate() {
639 if (playBeep && mediaPlayer != null) {
643 Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
644 vibrator.vibrate(VIBRATE_DURATION);
648 private void initCamera(SurfaceHolder surfaceHolder) {
650 CameraManager.get().openDriver(surfaceHolder);
651 } catch (IOException ioe) {
653 displayFrameworkBugMessageAndExit();
655 } catch (RuntimeException e) {
656 // Barcode Scanner has seen crashes in the wild of this variety:
657 // java.?lang.?RuntimeException: Fail to connect to camera service
658 Log.w(TAG, "Unexpected error initializating camera", e);
659 displayFrameworkBugMessageAndExit();
662 if (handler == null) {
663 handler = new CaptureActivityHandler(this, decodeFormats, characterSet);
667 private void displayFrameworkBugMessageAndExit() {
668 AlertDialog.Builder builder = new AlertDialog.Builder(this);
669 builder.setTitle(getString(R.string.app_name));
670 builder.setMessage(getString(R.string.msg_camera_framework_bug));
671 builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
672 builder.setOnCancelListener(new FinishListener(this));
676 private void resetStatusView() {
677 resultView.setVisibility(View.GONE);
678 statusView.setText(R.string.msg_default_status);
679 statusView.setVisibility(View.VISIBLE);
680 viewfinderView.setVisibility(View.VISIBLE);
684 public void drawViewfinder() {
685 viewfinderView.drawViewfinder();