MainActivity.java
| bt.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub String edit = et.getText().toString(); try { Bitmap createQRCode = EncodingHandler.createQRCode(edit, 300); iv.setImageBitmap(createQRCode); Bitmap bitmap; try { bitmap = BitmapUtil.gainBitmap(getApplicationContext(), R.drawable.ba10); bitmap = BitmapUtil.makeQRImage(bitmap,edit,400,400); if(bitmap != null){ iv.setImageBitmap(bitmap); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } catch (WriterException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); |
BitmapUtil.java
| package com.example.zxinglx; import java.util.Hashtable; import java.util.Random; 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; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; public class BitmapUtil { /** * 根据指定内容生成自定义宽高的二维码图片 * * param logoBm * logo图标 * param content * 需要生成二维码的内容 * param width * 二维码宽度 * param height * 二维码高度 * throws WriterException * 生成二维码异常 */ public static Bitmap makeQRImage(Bitmap logoBmp, String content, int QR_WIDTH, int QR_HEIGHT) throws WriterException { try { // 图像数据转换，使用了矩阵转换 Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 容错率 /*hints.put(EncodeHintType.MARGIN, 2); // default is 4 hints.put(EncodeHintType.MAX_SIZE, 350); hints.put(EncodeHintType.MIN_SIZE, 100);*/ BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints); int[] pixels = new int[QR_WIDTH * QR_HEIGHT]; for (int y = 0; y < QR_HEIGHT; y++) { // 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 x = 0; x < QR_WIDTH; x++) { if (bitMatrix.get(x, y)) { if (x < QR_WIDTH / 2 && y < QR_HEIGHT / 2) { pixels[y * QR_WIDTH + x] = 0xFF0094FF;// 蓝色 Integer.toHexString(new Random().nextInt()); } else if (x < QR_WIDTH / 2 && y > QR_HEIGHT / 2) { pixels[y * QR_WIDTH + x] = 0xFFFED545;// 黄色 } else if (x > QR_WIDTH / 2 && y > QR_HEIGHT / 2) { pixels[y * QR_WIDTH + x] = 0xFF5ACF00;// 绿色 } else { pixels[y * QR_WIDTH + x] = 0xFF000000;// 黑色 } } else { pixels[y * QR_WIDTH + x] = 0xffffffff;// 白色 } } } // ------------------添加图片部分------------------// Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT, Bitmap.Config.ARGB_8888); // 设置像素点 bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT); // 获取图片宽高 int logoWidth = logoBmp.getWidth(); int logoHeight = logoBmp.getHeight(); if (QR_WIDTH == 0 || QR_HEIGHT == 0) { return null; } if (logoWidth == 0 || logoHeight == 0) { return bitmap; } // 图片绘制在二维码中央，合成二维码图片 // logo大小为二维码整体大小的1/5 float scaleFactor = QR_WIDTH * 1.0f / 5 / logoWidth; try { Canvas canvas = new Canvas(bitmap); canvas.drawBitmap(bitmap, 0, 0, null); canvas.scale(scaleFactor, scaleFactor, QR_WIDTH / 2, QR_HEIGHT / 2); canvas.drawBitmap(logoBmp, (QR_WIDTH - logoWidth) / 2, (QR_HEIGHT - logoHeight) /2, null); canvas.save(Canvas.ALL_SAVE_FLAG); canvas.restore(); return bitmap; } catch (Exception e) { bitmap = null; e.getStackTrace(); } } catch (WriterException e) { e.printStackTrace(); } return null; } /** * 获取十六进制的颜色代码.例如 "#6E36B4" , For HTML , * @return String */ public static String getRandColorCode(){ String r,g,b; Random random = new Random(); r = Integer.toHexString(random.nextInt(256)).toUpperCase(); g = Integer.toHexString(random.nextInt(256)).toUpperCase(); b = Integer.toHexString(random.nextInt(256)).toUpperCase(); r = r.length()==1 ? "0" + r : r ; g = g.length()==1 ? "0" + g : g ; b = b.length()==1 ? "0" + b : b ; return r+g+b; } /** * 根据指定内容生成自定义宽高的二维码图片 * * @param content * 需要生成二维码的内容 * @param width * 二维码宽度 * @param height * 二维码高度 * @throws WriterException * 生成二维码异常 */ public static Bitmap makeQRImage(String content, int width, int height) throws WriterException { 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(content, BarcodeFormat.QR_CODE, width, height, hints); int[] pixels = new int[width * height]; // 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 < height; y++) { for (int x = 0; x < width; x++) { if (bitMatrix.get(x, y)) pixels[y * width + x] = 0xff000000; else pixels[y * width + x] = 0xffffffff; } } // 生成二维码图片的格式，使用ARGB_8888 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); bitmap.setPixels(pixels, 0, width, 0, 0, width, height); return bitmap; } /** * 从资源文件中获取图片转化成bitmap类型 * * @param context * 上下文 * @param drawableId * 资源文件id * @return */ public static Bitmap gainBitmap(Context context, int drawableId) { Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), drawableId); return bmp; } /** * 在图片右下角添加水印 * * @param srcBMP * 原图 * @param markBMP * 水印88图片 * @return 合成水印后的图片 */ public static Bitmap composeWatermark(Bitmap srcBMP, Bitmap markBMP) { if (srcBMP == null) { return null; } // 创建一个新的和SRC长度宽度一样的位图 Bitmap newb = Bitmap.createBitmap(srcBMP.getWidth(), srcBMP.getHeight(), Bitmap.Config.ARGB_8888); Canvas cv = new Canvas(newb); // 在 0，0坐标开始画入原图 cv.drawBitmap(srcBMP, 0, 0, null); // 在原图的右下角画入水印 cv.drawBitmap(markBMP, srcBMP.getWidth() - markBMP.getWidth()*4/5, srcBMP.getHeight()*2/7 , null); // 保存 cv.save(Canvas.ALL_SAVE_FLAG); // 存储 cv.restore(); return newb; } /** * 给二维码图片加背景 * */ public static Bitmap addBackground(Bitmap foreground,Bitmap background){ int bgWidth = background.getWidth(); int bgHeight = background.getHeight(); int fgWidth = foreground.getWidth(); int fgHeight = foreground.getHeight(); Bitmap newmap = Bitmap .createBitmap(bgWidth, bgHeight, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(newmap); canvas.drawBitmap(background, 0, 0, null); canvas.drawBitmap(foreground, (bgWidth - fgWidth) / 2, (bgHeight - fgHeight) *3 / 5+70, null); canvas.save(Canvas.ALL_SAVE_FLAG); canvas.restore(); return newmap; } } |