/**
* Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
* reuse the same reader objects from one decode to the next.
*
* @param data The YUV preview frame.
* @param width The width of the preview frame.
* @param height The height of the preview frame.
*/
private void decode(byte[] data, int width, int height) {
long start = System.currentTimeMillis();
Result rawResult = null;
PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
try {
rawResult = multiFormatReader.decodeWithState(bitmap);
} catch (ReaderException re) {
// continue
} finally {
multiFormatReader.reset();
}
if (rawResult != null) {
// Don't log the barcode contents for security.
long end = System.currentTimeMillis();
Log.d(TAG, "Found barcode in " + (end - start) + " ms");
Message message =
Message.obtain(activity.getHandler(), R.id.zxinglib_decode_succeeded, rawResult);
Bundle bundle = new Bundle();
bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
message.setData(bundle);
message.sendToTarget();
} else {
Message message = Message.obtain(activity.getHandler(), R.id.zxinglib_decode_failed);
message.sendToTarget();
}
}
@Override
public void handleMessage(Message message) {
if (message.what == R.id.restart_preview) {
Log.d(TAG, "Got restart preview message");
restartPreviewAndDecode();
} else if (message.what == R.id.decode_succeeded) {
Log.d(TAG, "Got decode succeeded message");
state = State.SUCCESS;
Bundle bundle = message.getData();
Bitmap barcode = null;
float scaleFactor = 1.0f;
if (bundle != null) {
byte[] compressedBitmap = bundle.getByteArray(DecodeThread.BARCODE_BITMAP);
if (compressedBitmap != null) {
barcode =
BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
// Mutable copy:
barcode = barcode.copy(Bitmap.Config.ARGB_8888, true);
}
scaleFactor = bundle.getFloat(DecodeThread.BARCODE_SCALED_FACTOR);
}
activity.handleDecode((Result) message.obj, barcode, scaleFactor);
} else if (message.what == R.id.decode_failed) {
// We're decoding as fast as possible, so when one decode fails, start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
} else if (message.what == R.id.return_scan_result) {
Log.d(TAG, "Got return scan result message");
activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
activity.finish();
} else if (message.what == R.id.launch_product_query) {
Log.d(TAG, "Got product query message");
String url = (String) message.obj;
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
intent.setData(Uri.parse(url));
ResolveInfo resolveInfo =
activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
String browserPackageName = null;
if (resolveInfo != null && resolveInfo.activityInfo != null) {
browserPackageName = resolveInfo.activityInfo.packageName;
Log.d(TAG, "Using browser in package " + browserPackageName);
}
// Needed for default Android browser / Chrome only apparently
if ("com.android.browser".equals(browserPackageName)
|| "com.android.chrome".equals(browserPackageName)) {
intent.setPackage(browserPackageName);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
}
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException ignored) {
Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
}
}
}
@Override
public void handleMessage(Message message) {
switch (message.what) {
case R.id.restart_preview:
Log.d(TAG, "Got restart preview message");
restartPreviewAndDecode();
break;
case R.id.decode_succeeded:
Log.d(TAG, "Got decode succeeded message");
state = State.SUCCESS;
Bundle bundle = message.getData();
Bitmap barcode =
bundle == null ? null : (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);
activity.handleDecode((Result) message.obj, barcode);
break;
case R.id.decode_failed:
// We're decoding as fast as possible, so when one decode fails, start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
break;
case R.id.return_scan_result:
Log.d(TAG, "Got return scan result message");
activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
activity.finish();
break;
case R.id.launch_product_query:
Log.d(TAG, "Got product query message");
String url = (String) message.obj;
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
intent.setData(Uri.parse(url));
ResolveInfo resolveInfo =
activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
String browserPackageName = null;
if (resolveInfo.activityInfo != null) {
browserPackageName = resolveInfo.activityInfo.packageName;
Log.d(TAG, "Using browser in package " + browserPackageName);
}
// Needed for default Android browser only apparently
if ("com.android.browser".equals(browserPackageName)) {
intent.setPackage(browserPackageName);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
}
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException anfe) {
Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
}
break;
}
}
/**
* Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
* reuse the same reader objects from one decode to the next.
*
* @param data The YUV preview frame.
* @param width The width of the preview frame.
* @param height The height of the preview frame.
*/
private void decode(byte[] data, int width, int height) {
long start = System.currentTimeMillis();
Result rawResult = null;
// PlanarYUVLuminanceSource source =
// activity.getCameraManager().buildLuminanceSource(data, width,
// height);
// ------------------------------------
byte[] rotatedData = new byte[data.length];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
rotatedData[x * height + height - y - 1] = data[x + y * width];
}
int tmp = width; // Here we are swapping, that's the difference to #11
width = height;
height = tmp;
PlanarYUVLuminanceSource source =
activity.getCameraManager().buildLuminanceSource(rotatedData, width, height);
// ------------------------------------
if (source != null) {
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
try {
rawResult = multiFormatReader.decodeWithState(bitmap);
} catch (ReaderException re) {
// continue
} finally {
multiFormatReader.reset();
}
}
Handler handler = activity.getHandler();
if (rawResult != null) {
// Don't log the barcode contents for security.
long end = System.currentTimeMillis();
Log.d(TAG, "Found barcode in " + (end - start) + " ms");
if (handler != null) {
Message message = Message.obtain(handler, R.id.decode_succeeded, rawResult);
Bundle bundle = new Bundle();
Bitmap grayscaleBitmap = toBitmap(source, source.renderCroppedGreyscaleBitmap());
bundle.putParcelable(DecodeThread.BARCODE_BITMAP, grayscaleBitmap);
message.setData(bundle);
message.sendToTarget();
}
} else {
if (handler != null) {
Message message = Message.obtain(handler, R.id.decode_failed);
message.sendToTarget();
}
}
}
@Override
public void handleMessage(Message message) {
switch (message.what) {
case R.id.auto_focus:
// Log.d(TAG, "Got auto-focus message");
// When one auto focus pass finishes, start another. This is the
// closest thing to
// continuous AF. It does seem to hunt a bit, but I'm not sure what
// else to do.
if (state == State.PREVIEW) {
CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
}
break;
case R.id.restart_preview:
Log.d(TAG, "Got restart preview message");
restartPreviewAndDecode();
break;
case R.id.decode_succeeded:
Log.d(TAG, "Got decode succeeded message");
state = State.SUCCESS;
Bundle bundle = message.getData();
/** ******************************************************************** */
Bitmap barcode =
bundle == null
? null
: (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP); // ���ñ����߳�
activity.handleDecode((Result) message.obj, barcode); // ���ؽ��
/** ******************************************************************** */
break;
case R.id.decode_failed:
// We're decoding as fast as possible, so when one decode fails,
// start another.
state = State.PREVIEW;
CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
break;
case R.id.return_scan_result:
Log.d(TAG, "Got return scan result message");
activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
activity.finish();
break;
case R.id.launch_product_query:
Log.d(TAG, "Got product query message");
String url = (String) message.obj;
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
activity.startActivity(intent);
break;
}
}
private void restartPreviewAndDecode() {
if (state == State.SUCCESS) {
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
activity.drawViewfinder();
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
try {
mCamera.stopPreview();
} catch (Exception e) {
// Don't do anything about this, since it probably won't affect the user.
}
// Update the preview here.
activityContext.updatePreviewSize(width, height);
try {
mCamera.startPreview();
} catch (Exception e) {
activityContext.startPreviewFailed(e);
return;
}
}
private void restartPreviewAndDecode() {
if (state == State.SUCCESS) {
state = State.PREVIEW;
CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
activity.drawViewfinder();
}
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
if (mCamera != null) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
activityContext.startPreviewFailed(e);
}
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog.setTitle("Please wait");
dialog.setMessage("Checking for data installation...");
dialog.setIndeterminate(false);
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setCancelable(false);
dialog.show();
activity.setButtonVisibility(false);
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
try {
indeterminateDialog.dismiss();
} catch (IllegalArgumentException e) {
// Catch "View not attached to window manager" error, and continue
}
if (result) {
// Restart recognition
activity.resumeOCR();
activity.showLanguageName();
} else {
activity.showErrorMessage(
"Error",
"Network is unreachable - cannot download language data. "
+ "Please enable network access and restart this app.");
}
}
public CaptureActivityHandler(
CaptureActivity activity, Vector<BarcodeFormat> decodeFormats, String characterSet) {
this.activity = activity;
decodeThread =
new DecodeThread(
activity,
decodeFormats,
characterSet,
new ViewfinderResultPointCallback(activity.getViewfinderView()));
decodeThread.start();
state = State.SUCCESS;
// Start ourselves capturing previews and decoding.
CameraManager.get().startPreview();
restartPreviewAndDecode();
}
@Override
public void handleMessage(Message message) {
switch (message.what) {
case Constants.ID_RESTART_PREVIEW:
restartPreviewAndDecode();
break;
case Constants.ID_DECODE_SUCCESS:
state = State.SUCCESS;
activity.handleDecode((String) message.obj, message.getData());
break;
case Constants.ID_DECODE_FAILED:
// We're decoding as fast as possible, so when one decode fails, start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), Constants.ID_DECODE);
break;
}
}
/**
* AsyncTask to asynchronously download data and initialize Tesseract.
*
* @param activity The calling activity
* @param baseApi API to the OCR engine
* @param dialog Dialog box with thermometer progress indicator
* @param indeterminateDialog Dialog box with indeterminate progress indicator
* @param languageCode ISO 639-2 OCR language code
* @param languageName Name of the OCR language, for example, "English"
* @param ocrEngineMode Whether to use Tesseract, Cube, or both
*/
OcrInitAsyncTask(
CaptureActivity activity,
TessBaseAPI baseApi,
ProgressDialog dialog,
ProgressDialog indeterminateDialog,
String languageCode,
String languageName,
int ocrEngineMode) {
this.activity = activity;
this.context = activity.getBaseContext();
this.baseApi = baseApi;
this.dialog = dialog;
this.indeterminateDialog = indeterminateDialog;
this.languageCode = languageCode;
this.languageName = languageName;
this.ocrEngineMode = ocrEngineMode;
}
CaptureActivityHandler(
CaptureActivity activity,
Collection<BarcodeFormat> decodeFormats,
Map<DecodeHintType, ?> baseHints,
String characterSet,
CameraManager cameraManager) {
this.activity = activity;
decodeThread =
new DecodeThread(
activity,
decodeFormats,
baseHints,
characterSet,
new ViewfinderResultPointCallback(activity.getViewfinderView()));
decodeThread.start();
state = State.SUCCESS;
// Start ourselves capturing previews and decoding.
this.cameraManager = cameraManager;
cameraManager.startPreview();
restartPreviewAndDecode();
}
