Zxing二维码解析——图文转换

一：文字转化为二维码图片。

package com.xhm.tool;

import java.util.Hashtable;

import android.graphics.Bitmap;
import android.text.TextUtils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

public class TextToBitmap {
    // 要生成的文字
    private String text;
    // 生成图片的大小
    private int QR_WIDTH, QR_HEIGHT;

    public TextToBitmap(String text, int QR_WIDTH, int QR_HEIGHT) {
        this.text = text;
        this.QR_HEIGHT = QR_HEIGHT;
        this.QR_WIDTH = QR_WIDTH;
    }

    public Bitmap getBitmap() {
        try {
            // 判断文字是否为空
            if (TextUtils.isEmpty(text)) {
                return null;
            }
            // 设置二维码属性，如编码格式，大小，颜色等
            Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            BitMatrix bitMatrix = new QRCodeWriter().encode(text,
                    BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
            int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
            for (int y = 0; y < QR_HEIGHT; y++) {
                for (int x = 0; x < QR_WIDTH; x++) {
                    if (bitMatrix.get(x, y)) {
                        pixels[y * QR_WIDTH + x] = 0xff000000;
                    } else {
                        pixels[y * QR_WIDTH + x] = 0xffffffff;
                    }
                }
            }
            // 建立一个bitmap图片，用来接受二维码的颜色。
            Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
                    Bitmap.Config.ARGB_8888);

            bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
            return bitmap;
        } catch (WriterException e) {
            e.printStackTrace();
            return null;
        }
    }
}

二：图片转换为文字：

package com.xhm.tool;

import java.util.Hashtable;

import android.graphics.Bitmap;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.DecodeHintType;
import com.google.zxing.FormatException;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;

public class BitmapToText {
    // 要读取的二维码图片
    private Bitmap bitmap;

    public BitmapToText(Bitmap bitmap) {
        this.bitmap = bitmap;
    }

    // 获得文字
    public String getText() {
        int mWidth, mHeight;
        String value = null;
        Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
        // 设置解析编码
        hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
        mWidth = bitmap.getWidth();
        mHeight = bitmap.getHeight();
        int[] pixels = new int[mWidth * mHeight];
        bitmap.getPixels(pixels, 0, mWidth, 0, 0, mWidth, mHeight);
        RGBLuminanceSource source = new RGBLuminanceSource(mWidth, mHeight,
                pixels);
        BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
        QRCodeReader reader2 = new QRCodeReader();
        Result result = null;
        try {
            result = reader2.decode(bitmap1, hints);
            value = result.getText();
        } catch (NotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ChecksumException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return value;
    }
}

三：调用代码

获得imageview中的图片

ImageView image = (ImageView) view[1];
// 缓存图片，方便后边调用
image.setDrawingCacheEnabled(true);

  ImageView image = (ImageView) view[1];
  // 获得缓存的图片
  btt = new BitmapToText(image.getDrawingCache(true));

JAR包下载地址：http://download.csdn.net/detail/as294985925/5685213     

源码下载地址：http://download.csdn.net/detail/as294985925/5685321