/*
- * Copyright 2008 ZXing authors
+ * Copyright (C) 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
package com.google.zxing.client.android;
-import android.app.Application;
-import android.graphics.Bitmap;
-import android.os.Debug;
-import android.os.Handler;
-import android.os.Looper;
-import android.os.Message;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
-import com.google.zxing.MonochromeBitmapSource;
-import com.google.zxing.MultiFormatReader;
-import com.google.zxing.ReaderException;
-import com.google.zxing.Result;
-
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.util.Date;
+import com.google.zxing.ResultPointCallback;
+
+import android.content.SharedPreferences;
+import android.os.Handler;
+import android.os.Looper;
+import android.preference.PreferenceManager;
+
import java.util.Hashtable;
import java.util.Vector;
+import java.util.concurrent.CountDownLatch;
/**
- * This thread does all the heavy lifting of decoding the images. It can also save images to flash
- * for debugging purposes.
+ * This thread does all the heavy lifting of decoding the images.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
final class DecodeThread extends Thread {
- public Handler handler;
+ public static final String BARCODE_BITMAP = "barcode_bitmap";
- private final BarcodeReaderCaptureActivity activity;
- private final CameraManager cameraManager;
- private Hashtable<DecodeHintType, Object> hints;
- private Handler cameraThreadHandler;
- private int methodTraceCount;
- private boolean tracing;
+ private final CaptureActivity activity;
+ private final Hashtable<DecodeHintType, Object> hints;
+ private Handler handler;
+ private final CountDownLatch handlerInitLatch;
- DecodeThread(BarcodeReaderCaptureActivity activity, CameraManager cameraManager) {
- this.activity = activity;
- this.cameraManager = cameraManager;
- methodTraceCount = 0;
- tracing = false;
- }
+ DecodeThread(CaptureActivity activity,
+ Vector<BarcodeFormat> decodeFormats,
+ String characterSet,
+ ResultPointCallback resultPointCallback) {
- @Override
- public void run() {
- Looper.prepare();
- handler = new Handler() {
- @Override
- public void handleMessage(Message message) {
- switch (message.what) {
- case R.id.decode:
- captureAndDecode();
- break;
- case R.id.save:
- captureAndSave();
- break;
- case R.id.quit:
- Looper.myLooper().quit();
- break;
- case R.id.set_decode_all_mode:
- setDecodeAllMode();
- break;
- case R.id.set_decode_1D_mode:
- setDecode1DMode();
- break;
- case R.id.set_decode_QR_mode:
- setDecodeQRMode();
- break;
- case R.id.toggle_tracing:
- tracing = !tracing;
- break;
- }
- }
- };
- Looper.loop();
- }
-
- public void setCameraThreadHandler(Handler cameraThreadHandler) {
- this.cameraThreadHandler = cameraThreadHandler;
- }
-
- private void setDecodeAllMode() {
- hints = null;
- }
-
- // TODO: This is fragile in case we add new formats. It would be better to have a new enum
- // value which represented all 1D formats.
- private void setDecode1DMode() {
- hints = new Hashtable<DecodeHintType, Object>(3);
- Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>();
- vector.addElement(BarcodeFormat.UPC_A);
- vector.addElement(BarcodeFormat.UPC_E);
- vector.addElement(BarcodeFormat.EAN_13);
- vector.addElement(BarcodeFormat.EAN_8);
- vector.addElement(BarcodeFormat.CODE_39);
- vector.addElement(BarcodeFormat.CODE_128);
- hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
- }
+ this.activity = activity;
+ handlerInitLatch = new CountDownLatch(1);
- private void setDecodeQRMode() {
hints = new Hashtable<DecodeHintType, Object>(3);
- Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>();
- vector.addElement(BarcodeFormat.QR_CODE);
- hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
- }
-
- private void captureAndDecode() {
- Date startDate = new Date();
- Bitmap bitmap = cameraManager.captureStill();
- // Let the CameraThread know it can resume previews while the decoding continues in parallel.
- Message restart = Message.obtain(cameraThreadHandler, R.id.decode_started);
- restart.sendToTarget();
- if (tracing) {
- Debug.startMethodTracing("/sdcard/ZXingDecodeThread" + methodTraceCount);
- methodTraceCount++;
- }
- boolean success;
- Result rawResult = null;
- try {
- MonochromeBitmapSource source = new RGBMonochromeBitmapSource(bitmap);
- rawResult = new MultiFormatReader().decode(source, hints);
- success = true;
- } catch (ReaderException e) {
- success = false;
- }
- if (tracing) {
- Debug.stopMethodTracing();
- }
- Date endDate = new Date();
-
- if (success) {
- Message message = Message.obtain(cameraThreadHandler, R.id.decode_succeeded, rawResult);
- message.arg1 = (int) (endDate.getTime() - startDate.getTime());
- message.sendToTarget();
- } else {
- Message message = Message.obtain(cameraThreadHandler, R.id.decode_failed);
- message.sendToTarget();
+ // The prefs can't change while the thread is running, so pick them up once here.
+ if (decodeFormats == null || decodeFormats.isEmpty()) {
+ SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
+ decodeFormats = new Vector<BarcodeFormat>();
+ if (prefs.getBoolean(PreferencesActivity.KEY_DECODE_1D, true)) {
+ decodeFormats.addAll(DecodeFormatManager.ONE_D_FORMATS);
+ }
+ if (prefs.getBoolean(PreferencesActivity.KEY_DECODE_QR, true)) {
+ decodeFormats.addAll(DecodeFormatManager.QR_CODE_FORMATS);
+ }
+ if (prefs.getBoolean(PreferencesActivity.KEY_DECODE_DATA_MATRIX, true)) {
+ decodeFormats.addAll(DecodeFormatManager.DATA_MATRIX_FORMATS);
+ }
}
- }
+ hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
- /**
- * This is a debugging feature used to take photos and save them as JPEGs using the exact camera
- * setup as in normal decoding. This is useful for building up a library of test images.
- */
- private void captureAndSave() {
- Bitmap bitmap = cameraManager.captureStill();
- OutputStream outStream = getNewPhotoOutputStream();
- if (outStream != null) {
- bitmap.compress(Bitmap.CompressFormat.JPEG, 80, outStream);
- try {
- outStream.close();
- } catch (IOException e) {
- }
- Message success = Message.obtain(cameraThreadHandler, R.id.save_succeeded);
- success.sendToTarget();
- } else {
- Message failure = Message.obtain(cameraThreadHandler, R.id.save_failed);
- failure.sendToTarget();
+ if (characterSet != null) {
+ hints.put(DecodeHintType.CHARACTER_SET, characterSet);
}
+
+ hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
}
- /**
- * We prefer to write to the SD Card because it has more space, and is automatically mounted as a
- * drive over USB. If it's not present, fall back to the package's private file area here:
- *
- * /data/data/com.google.zxing.client.android/files
- *
- * @return A stream which represents the new file where the photo will be saved.
- */
- private OutputStream getNewPhotoOutputStream() {
- File sdcard = new File("/sdcard");
- if (sdcard.exists()) {
- File barcodes = new File(sdcard, "barcodes");
- if (!barcodes.exists()) {
- if (!barcodes.mkdir()) {
- return null;
- }
- }
- String fileName = getNewPhotoName();
- try {
- return new FileOutputStream(new File(barcodes, fileName));
- } catch (FileNotFoundException e) {
- }
- } else {
- Application application = activity.getApplication();
- String fileName = getNewPhotoName();
- try {
- return application.openFileOutput(fileName, 0);
- } catch (FileNotFoundException e) {
- }
+ Handler getHandler() {
+ try {
+ handlerInitLatch.await();
+ } catch (InterruptedException ie) {
+ // continue?
}
- return null;
+ return handler;
}
- private String getNewPhotoName() {
- Date now = new Date();
- return "capture" + now.getTime() + ".jpg";
+ @Override
+ public void run() {
+ Looper.prepare();
+ handler = new DecodeHandler(activity, hints);
+ handlerInitLatch.countDown();
+ Looper.loop();
}
}
projects / zxing.git / blobdiff