| /* |
| * 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. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.zxing.client.android; |
| |
| import com.google.zxing.BarcodeFormat; |
| import com.google.zxing.DecodeHintType; |
| import com.google.zxing.ResultPointCallback; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| |
| import java.util.Hashtable; |
| import java.util.Vector; |
| import java.util.concurrent.CountDownLatch; |
| |
| /** |
| * This thread does all the heavy lifting of decoding the images. |
| * |
| * @author dswitkin@google.com (Daniel Switkin) |
| */ |
| final class DecodeThread extends Thread { |
| |
| public static final String BARCODE_BITMAP = "barcode_bitmap"; |
| |
| private final CaptureActivity activity; |
| private final Hashtable<DecodeHintType,Object> hints; |
| private Handler handler; |
| private final CountDownLatch handlerInitLatch; |
| |
| DecodeThread(CaptureActivity activity, |
| String characterSet, |
| ResultPointCallback resultPointCallback) { |
| |
| this.activity = activity; |
| handlerInitLatch = new CountDownLatch(1); |
| |
| hints = new Hashtable<DecodeHintType,Object>(); |
| Vector<BarcodeFormat> formats = new Vector<BarcodeFormat>(); |
| formats.add(BarcodeFormat.QR_CODE); |
| hints.put(DecodeHintType.POSSIBLE_FORMATS, formats); |
| |
| if (characterSet != null) { |
| hints.put(DecodeHintType.CHARACTER_SET, characterSet); |
| } |
| hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback); |
| } |
| |
| Handler getHandler() { |
| try { |
| handlerInitLatch.await(); |
| } catch (InterruptedException ie) { |
| // continue? |
| } |
| return handler; |
| } |
| |
| @Override |
| public void run() { |
| Looper.prepare(); |
| handler = new DecodeHandler(activity, hints); |
| handlerInitLatch.countDown(); |
| Looper.loop(); |
| } |
| |
| } |