Android 调用UVCCamera 采集UVC摄像头数据，并调用zxing 扫码库扫码

zxing 提供的sample都是原生camera采集摄像头数据，而android上使用UVCCamera采集摄像头的情况比较多，那么怎么在uvccamera采集到摄像头数据，并调用zxing扫码呢。直接上代码。

DecodeHandle.java

package com.baidu.idl.face.main.decode;import android.content.Context;import android.graphics.Bitmap;import android.os.Bundle;import android.os.Handler;import android.os.HandlerThread;import android.os.Looper;import android.os.Message;import android.text.TextUtils;import android.util.Log;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.MultiFormatReader;import com.google.zxing.PlanarYUVLuminanceSource;import com.google.zxing.ReaderException;import com.google.zxing.Result;import com.google.zxing.common.HybridBinarizer;import java.util.Arrays;import java.util.Collection;import java.util.Map;import java.util.EnumMap;import java.util.EnumSet;public class DecodeHandler {    private final DecodeListener mListener;    private boolean isAvailable = true;    private static final int DECODE_BITMAP = 0;    private static final int DECODE_YUV = 1;    //private QrDecoder mDecoder;    private DecodeThread mDecodThread;    private int mTimeout;    Context mContext;    private int mWidth;    private int mHeight;    private final Map hints;    private Collection decodeFormats;    private final MultiFormatReader multiFormatReader;    public DecodeHandler(Context context, DecodeListener listener,final int width, final int height) {        mWidth = width;        mHeight = height;        mListener = listener;        mContext = context;        //mDecoder = new QrDecoder(context);        HandlerThread thread = new HandlerThread("qr_decode_thread");        thread.start();        mDecodThread = new DecodeThread(thread.getLooper());        //扫码初始化        multiFormatReader = new MultiFormatReader();        decodeFormats = EnumSet.of(BarcodeFormat.QR_CODE, BarcodeFormat.CODE_128);        hints = new EnumMap<>(DecodeHintType.class);        hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);        String characterSet = "utf-8";        if (characterSet != null) {            hints.put(DecodeHintType.CHARACTER_SET, characterSet);        }        hints.put(DecodeHintType.TRY_HARDER, true);        multiFormatReader.setHints(hints);    }    public void release() {        setAvailable(false);        mDecodThread.getLooper().quit();    }    public void pushYuv(byte[] yuv) {        Log.d("MainActivity","pushYuv()");        if (isAvailable()) {            setAvailable(false);            mDecodThread.obtainMessage(DECODE_YUV, yuv).sendToTarget();        }    }    private boolean isAvailable() {        return isAvailable;    }    private void setAvailable(boolean b) {        isAvailable = b;    }    private class DecodeThread extends Handler {        DecodeThread(Looper looper) {            super(looper);        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case DECODE_YUV:                {                    decode((byte[])msg.obj,mWidth,mHeight);                    setAvailable(true);                }                break;            }        }    }    /**     * @param data   A preview frame.     * @param width  The width of the image.     * @param height The height of the image.     * @return A PlanarYUVLuminanceSource instance.     */    public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {        return new PlanarYUVLuminanceSource(data, width, height, 0, 0,                width, height, false);    }    /**     * @param data   The YUV preview frame.     * @param width  The width of the preview frame.     * @param height The height of the preview frame.     */    private void decode(byte[] data, int width, int height) {        long start = System.currentTimeMillis();        Result rawResult = null;        PlanarYUVLuminanceSource source = buildLuminanceSource(data, width, height);        if (source != null) {            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));            try {                rawResult = multiFormatReader.decodeWithState(bitmap);                  BarcodeFormat format = rawResult.getBarcodeFormat();                //类型                String type = format.toString();                String strScan = rawResult.getText();                String content = new String(strScan.trim());                if (!TextUtils.isEmpty(content)) {                    mListener.onDecodeSuccess(content);                }            } catch (ReaderException re) {                // continue                mListener.onDecodeFailed(-1);            } finally {                multiFormatReader.reset();            }        }    }}

DecodeListener.java

package com.baidu.idl.face.main.decode;public interface DecodeListener {    public void onDecodeSuccess(final String content);    public void onDecodeFailed(final int error);}

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