DecodeHandler.java

package com.zbar.lib.decode;

import android.graphics.Bitmap;
import android.os.Environment;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;

import com.zbar.lib.CaptureView;
import com.zbar.lib.R;
import com.zbar.lib.ZbarManager;
import com.zbar.lib.bitmap.PlanarYUVLuminanceSource;

import java.io.File;
import java.io.FileOutputStream;

/**
 * 作者: 陈涛(1076559197@qq.com)
 * 
 * 时间: 2014年5月9日 下午12:24:13
 * 
 * 版本: V_1.0.0
 * 
 * 描述: 接受消息后解码
 */
final class DecodeHandler extends Handler {

	CaptureView captureView;

	DecodeHandler(CaptureView captureView) {
		this.captureView = captureView;
	}

	@Override
	public void handleMessage(Message message) {
        final int id = message.what;
        if (id == R.id.decode){
            decode((byte[]) message.obj, message.arg1, message.arg2);
        } else if (id == R.id.quit){
            Looper.myLooper().quit();
        }
	}

	private void decode(byte[] data, int width, int height) {
		byte[] rotatedData = new byte[data.length];
		for (int y = 0; y < height; y++) {
			for (int x = 0; x < width; x++)
				rotatedData[x * height + height - y - 1] = data[x + y * width];
		}
		int tmp = width;// Here we are swapping, that's the difference to #11
		width = height;
		height = tmp;

		ZbarManager manager = new ZbarManager();
		String result = manager.decode(rotatedData, width, height, true, captureView.getX(), captureView.getY(), captureView.getCropWidth(),
                captureView.getCropHeight());

		if (result != null) {
			if (captureView.isNeedCapture()) {
				// 生成bitmap
				PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(rotatedData, width, height, captureView.getX(), captureView.getY(),
                        captureView.getCropWidth(), captureView.getCropHeight(), false);
				int[] pixels = source.renderThumbnail();
				int w = source.getThumbnailWidth();
				int h = source.getThumbnailHeight();
				Bitmap bitmap = Bitmap.createBitmap(pixels, 0, w, w, h, Bitmap.Config.ARGB_8888);
				try {
					String rootPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Qrcode/";
					File root = new File(rootPath);
					if (!root.exists()) {
						root.mkdirs();
					}
					File f = new File(rootPath + "Qrcode.jpg");
					if (f.exists()) {
						f.delete();
					}
					f.createNewFile();

					FileOutputStream out = new FileOutputStream(f);
					bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
					out.flush();
					out.close();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}

			if (null != captureView.getHandler()) {
				Message msg = new Message();
				msg.obj = result;
				msg.what = R.id.decode_succeeded;
                captureView.getHandler().sendMessage(msg);
			}
		} else {
			if (null != captureView.getHandler()) {
                captureView.getHandler().sendEmptyMessage(R.id.decode_failed);
			}
		}
	}

}