Initial commit

lib/src/main/java/com/king/zxing/camera/PreviewCallback.java

@@ -0,0 +1,58 @@
+package com.king.zxing.camera;
+
+/*
+ * Copyright (C) 2010 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 android.graphics.Point;
+import android.hardware.Camera;
+import android.os.Handler;
+import android.os.Message;
+import android.util.Log;
+
+@SuppressWarnings("deprecation") // camera APIs
+final class PreviewCallback implements Camera.PreviewCallback {
+
+    private static final String TAG = PreviewCallback.class.getSimpleName();
+
+    private final CameraConfigurationManager configManager;
+    private Handler previewHandler;
+    private int previewMessage;
+
+    PreviewCallback(CameraConfigurationManager configManager) {
+        this.configManager = configManager;
+    }
+
+    void setHandler(Handler previewHandler, int previewMessage) {
+        this.previewHandler = previewHandler;
+        this.previewMessage = previewMessage;
+    }
+
+    @Override
+    public void onPreviewFrame(byte[] data, Camera camera) {
+        Point cameraResolution = configManager.getCameraResolution();
+        Handler thePreviewHandler = previewHandler;
+        if (cameraResolution != null && thePreviewHandler != null) {
+            Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
+                    cameraResolution.y, data);
+            message.sendToTarget();
+            previewHandler = null;
+        } else {
+            Log.d(TAG, "Got preview callback, but no handler or resolution available");
+        }
+    }
+
+}