ZxingUtil二维码封装

来源：互联网发布：lrc歌词编辑软件编辑：程序博客网时间：2024/05/22 19:19
import java.util.HashMap;import java.util.Hashtable;import java.util.Map;import android.graphics.Bitmap;import android.graphics.Canvas;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;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;public class ZxingUtil {    private static int QR_WIDTH = 156;    private static int QR_HEIGHT = 156;    public static Bitmap createQRImage(String url, Bitmap logo) {        try {            // 判断URL合法性            if (url == null || "".equals(url) || url.length() < 1) {                return null;            }            Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            // 图像数据转换，使用了矩阵转换            BitMatrix bitMatrix = new QRCodeWriter().encode(url, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);            int[] pixels = new int[QR_WIDTH * QR_HEIGHT];            // 下面这里按照二维码的算法，逐个生成二维码的图片，            // 两个for循环是图片横列扫描的结果            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;                    }                }            }            // 生成二维码图片的格式，使用ARGB_8888            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 addLogo(bitmap, logo);        } catch (WriterException e) {            e.printStackTrace();        }        return null;    }    /**     * 在二维码中间添加Logo图案     */    private 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.getStackTrace();        }        return bitmap;    }    /**     * 生成二维码Bitmap     *      * @param content     *            内容     * @param widthPix     *            图片宽度     * @param heightPix     *            图片高度     * @param logoBm     *            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 Bitmap createQRImage(String content, int widthPix, int heightPix, Bitmap logoBm, String filePath) {        try {            if (content == null || "".equals(content)) {                return null;            }            // 配置参数            Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            // 容错级别            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);            // 设置空白边距的宽度            hints.put(EncodeHintType.MARGIN, 2); // default is 4            // 图像数据转换，使用了矩阵转换            BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, widthPix, heightPix, hints);            int[] pixels = new int[widthPix * heightPix];            // 下面这里按照二维码的算法，逐个生成二维码的图片，            // 两个for循环是图片横列扫描的结果            for (int y = 0; y < heightPix; y++) {                for (int x = 0; x < widthPix; x++) {                    if (bitMatrix.get(x, y)) {                        pixels[y * widthPix + x] = 0xff000000;                    } else {                        pixels[y * widthPix + x] = 0xffffffff;                    }                }            }            // 生成二维码图片的格式，使用ARGB_8888            Bitmap bitmap = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888);            bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);            if (logoBm != null) {                bitmap = addLogo(bitmap, logoBm);            }            // 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！            // boolean result = bitmap != null            // && bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new            // FileOutputStream(filePath));            // if (result)            return bitmap;            // else            // return null;        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}
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ZxingUtil二维码 封装

ZxingUtil二维码封装
