Initial commit

lib/src/main/java/com/king/zxing/DecodeThread.java

@@ -0,0 +1,114 @@
+package com.king.zxing;
+
+/*
+ * 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.
+ */
+
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.ResultPointCallback;
+
+import android.content.SharedPreferences;
+import android.os.Handler;
+import android.os.Looper;
+import android.preference.PreferenceManager;
+import android.util.Log;
+
+import java.util.Collection;
+import java.util.EnumMap;
+import java.util.EnumSet;
+import java.util.Map;
+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";
+    public static final String BARCODE_SCALED_FACTOR = "barcode_scaled_factor";
+
+    private final CaptureActivity activity;
+    private final Map<DecodeHintType,Object> hints;
+    private Handler handler;
+    private final CountDownLatch handlerInitLatch;
+
+    DecodeThread(CaptureActivity activity,
+                 Collection<BarcodeFormat> decodeFormats,
+                 Map<DecodeHintType,?> baseHints,
+                 String characterSet,
+                 ResultPointCallback resultPointCallback) {
+
+        this.activity = activity;
+        handlerInitLatch = new CountDownLatch(1);
+
+        hints = new EnumMap<>(DecodeHintType.class);
+        if (baseHints != null) {
+            hints.putAll(baseHints);
+        }
+
+        // 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 = EnumSet.noneOf(BarcodeFormat.class);
+            if (prefs.getBoolean(Preferences.KEY_DECODE_1D_PRODUCT, true)) {
+                decodeFormats.addAll(DecodeFormatManager.PRODUCT_FORMATS);
+            }
+            if (prefs.getBoolean(Preferences.KEY_DECODE_1D_INDUSTRIAL, true)) {
+                decodeFormats.addAll(DecodeFormatManager.INDUSTRIAL_FORMATS);
+            }
+            if (prefs.getBoolean(Preferences.KEY_DECODE_QR, true)) {
+                decodeFormats.addAll(DecodeFormatManager.QR_CODE_FORMATS);
+            }
+            if (prefs.getBoolean(Preferences.KEY_DECODE_DATA_MATRIX, true)) {
+                decodeFormats.addAll(DecodeFormatManager.DATA_MATRIX_FORMATS);
+            }
+            if (prefs.getBoolean(Preferences.KEY_DECODE_AZTEC, false)) {
+                decodeFormats.addAll(DecodeFormatManager.AZTEC_FORMATS);
+            }
+            if (prefs.getBoolean(Preferences.KEY_DECODE_PDF417, false)) {
+                decodeFormats.addAll(DecodeFormatManager.PDF417_FORMATS);
+            }
+        }
+        hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
+
+        if (characterSet != null) {
+            hints.put(DecodeHintType.CHARACTER_SET, characterSet);
+        }
+        hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
+        Log.i("DecodeThread", "Hints: " + hints);
+    }
+
+    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();
+    }
+
+}