Android Open Source - qrcode-android Preview Callback

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License

The source code is released under:

MIT License

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Java Source Code

/*
 * Copyright (C) 2010 ZXing authors//from  www  .  j a  v a  2 s .co  m
 *
 * 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.camera;

import android.graphics.Point;
import android.hardware.Camera;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

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");
        }
    }

}

Java Source Code List