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.DecodeHintType;
21 import com.google.zxing.ResultPointCallback;
23 import android.content.SharedPreferences;
24 import android.os.Handler;
25 import android.os.Looper;
26 import android.preference.PreferenceManager;
28 import java.util.Hashtable;
29 import java.util.Vector;
32 * This thread does all the heavy lifting of decoding the images.
34 * @author dswitkin@google.com (Daniel Switkin)
36 final class DecodeThread extends Thread {
38 public static final String BARCODE_BITMAP = "barcode_bitmap";
40 private final Handler handler;
42 DecodeThread(CaptureActivity activity,
43 Vector<BarcodeFormat> decodeFormats,
45 ResultPointCallback resultPointCallback) {
46 Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
48 // The prefs can't change while the thread is running, so pick them up once here.
49 if (decodeFormats == null || decodeFormats.isEmpty()) {
50 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
51 boolean decode1D = prefs.getBoolean(PreferencesActivity.KEY_DECODE_1D, true);
52 boolean decodeQR = prefs.getBoolean(PreferencesActivity.KEY_DECODE_QR, true);
53 if (decode1D && decodeQR) {
54 hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.ALL_FORMATS);
55 } else if (decode1D) {
56 hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.ONE_D_FORMATS);
57 } else if (decodeQR) {
58 hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.QR_CODE_FORMATS);
61 hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
64 if (characterSet != null) {
65 hints.put(DecodeHintType.CHARACTER_SET, characterSet);
68 hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
70 this.handler = new DecodeHandler(activity, hints);
73 Handler getHandler() {