二维码操作工具类

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二维码操作工具类QRCodeUtils

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二维码的生成、添加logo…

-使用google官方提供的zxing包来实现
QRCodeUtils.java

package com.myself.utils;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.text.TextUtils;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.QRCodeWriter;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import java.io.FileOutputStream;import java.io.IOException;import java.util.HashMap;import java.util.Map;/** * Description: 二维码操作 * Copyright  : Copyright (c) 2016 * Email      : jusenr@163.com * Company    :  * Author     : Jusenr * Date       : 2016/12/16 15:11. */public class QRCodeUtils {    /**     * 生成二维码     *     * @param content                  内容     * @param widthPix                 图片宽度     * @param heightPix                图片高度     * @param openErrorCorrectionLevel 开启容错率     * @param logoBitmap               二维码中心的Logo图标（可以为null）     * @param filePath                 用于存储二维码图片的文件路径     * @return 生成二维码及保存文件是否成功     */    public static boolean createQRCode(String content, int widthPix, int heightPix, boolean openErrorCorrectionLevel, Bitmap logoBitmap, String filePath) {        try {            if (TextUtils.isEmpty(content) || TextUtils.equals("null", content) || "".equals(content)) {                return false;            }            Map hints = openErrorCorrectionLevel(openErrorCorrectionLevel);            // 图像数据转换，使用了矩阵转换            BitMatrix bitMatrix = new QRCodeWriter().encode(new String(content.getBytes("UTF-8"), "iso-8859-1"), BarcodeFormat.QR_CODE, widthPix, heightPix, hints);            Bitmap bitmap = generateQRBitmap(bitMatrix);            if (logoBitmap != null) {                bitmap = addLogo(bitmap, logoBitmap);            }            boolean compress = bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(filePath));//            ImageUtils            //必须使用compress方法将bitmap保存到文件中再进行读取。直接返回的bitmap是没有任何压缩的，内存消耗巨大！            return bitmap != null && bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(filePath));        } catch (WriterException | IOException e) {            e.printStackTrace();        }        return false;    }    /**     * 生成一个二维码图像     *     * @param content                  传入的字符串，通常是一个URL     * @param widthAndHeight           图像的宽高     * @param openErrorCorrectionLevel 开启容错率     */    public static Bitmap createQRCode(String content, int widthAndHeight, boolean openErrorCorrectionLevel) {        try {            if (TextUtils.isEmpty(content) || TextUtils.equals("null", content) || "".equals(content)) {                return null;            }            // 处理汉字，如果不用更改源码，将字符串转换成ISO-8859-1编码            Map hints = openErrorCorrectionLevel(openErrorCorrectionLevel);            BitMatrix matrix = new MultiFormatWriter().encode(new String(content.getBytes("UTF-8"), "ISO-8859-1"), BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight, hints);            matrix = updateBit(matrix, 8);            Bitmap bitmap = generateQRBitmap(matrix);            return bitmap;        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    public static BitMatrix updateBit(BitMatrix matrix, int margin) {        int tempM = margin * 2;        int[] rec = matrix.getEnclosingRectangle();   //获取二维码图案的属性        int resWidth = rec[2] + tempM;        int resHeight = rec[3] + tempM;        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight); // 按照自定义边框生成新的BitMatrix        resMatrix.clear();        for (int i = margin; i < resWidth - margin; i++) {   //循环，将二维码图案绘制到新的bitMatrix中            for (int j = margin; j < resHeight - margin; j++) {                if (matrix.get(i - margin + rec[0], j - margin + rec[1])) {                    resMatrix.set(i, j);                }            }        }        return resMatrix;    }    /**     * 生成一个二维码图像     *     * @param content     * @return     */    public static Bitmap createQRCode(String content) {        try {            if (TextUtils.isEmpty(content) || TextUtils.equals("null", content) || "".equals(content)) {                return null;            }            BitMatrix matrix = new MultiFormatWriter().encode(new String(content.getBytes("UTF-8"), "iso-8859-1"), BarcodeFormat.QR_CODE, 200, 200);            Bitmap bitmap = generateQRBitmap(matrix);            return bitmap;        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    /**     * 生成一个二维码图像     *     * @param qrCodeUrl     * @param width     * @param height     * @return     */    public static Bitmap createQRCode(String qrCodeUrl, int width, int height) {        Bitmap bitmap = createQRCode(qrCodeUrl, width, height, false);        return bitmap;    }    /**     * 生成一个二维码图像     *     * @param content     * @param width     * @param height     * @return     */    public static Bitmap createQRCode(String content, int width, int height, boolean openFaultTolerantRate) {        try {            if (TextUtils.isEmpty(content) || TextUtils.equals("null", content) || "".equals(content)) {                return null;            }            Map hints = openErrorCorrectionLevel(openFaultTolerantRate);            BitMatrix matrix = new MultiFormatWriter().encode(new String(content.getBytes("UTF-8"), "iso-8859-1"), BarcodeFormat.QR_CODE, width, height, hints);            Bitmap bitmap = generateQRBitmap(matrix);            return bitmap;        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    /**     * 绘制二维码     *     * @param matrix     * @return     */    public static Bitmap generateQRBitmap(BitMatrix matrix) {        int w = matrix.getWidth();        int h = matrix.getHeight();        int[] rawData = new int[w * h];        for (int i = 0; i < w; i++) {            for (int j = 0; j < h; j++) {                int color = Color.WHITE;                if (matrix.get(i, j)) {                    color = Color.BLACK;                }                rawData[i + (j * w)] = color;            }        }        Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);        bitmap.setPixels(rawData, 0, w, 0, 0, w, h);        return bitmap;    }    /**     * 配置参数     *     * @param tag     * @return     */    public static Map openErrorCorrectionLevel(boolean tag) {        Map<EncodeHintType, Object> hints = new HashMap<>();        if (tag) {            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  //容错级别//            hints.put(EncodeHintType.MARGIN, 2);  //设置空白边距的宽度 default is 4        }        return hints;    }    /**     * 在二维码中间添加Logo图案     */    public static Bitmap addLogo(Bitmap src, Bitmap logo) {        if (src == null) {            return null;        }        if (logo == null) {            return src;        }        //获取图片的宽高        int srcWidth = src.getWidth();        int srcHeight = src.getHeight();        int logoWidth = logo.getWidth();        int logoHeight = logo.getHeight();        if (srcWidth == 0 || srcHeight == 0) {            return null;        }        if (logoWidth == 0 || logoHeight == 0) {            return src;        }        //logo大小为二维码整体大小的1/5        float scaleFactor = srcWidth * 1.0f / 5 / logoWidth;        Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight, Bitmap.Config.ARGB_8888);        try {            Canvas canvas = new Canvas(bitmap);            canvas.drawBitmap(src, 0, 0, null);            canvas.scale(scaleFactor, scaleFactor, srcWidth / 2, srcHeight / 2);            canvas.drawBitmap(logo, (srcWidth - logoWidth) / 2, (srcHeight - logoHeight) / 2, null);            canvas.save(Canvas.ALL_SAVE_FLAG);            canvas.restore();        } catch (Exception e) {            bitmap = null;            e.printStackTrace();        }        return bitmap;    }}
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