Android生成彩色的二維碼
現在開發中的二維碼是越來越多，但是也催生了一些多元化的需求，比如要做個彩色的二維碼，下面是一段java代碼產生的二維碼圖片：
第一步就是去網上下載core.jar或者zxing.jar
準備你要的logo圖片接下來當然就是 代碼的編寫了
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
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;/** * @author tangb * */ public class QRCode { // 圖片寬度的一半 private static final int IMAGE_WIDTH = 100; private static final int IMAGE_HEIGHT = 100; private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2; private static final int FRAME_WIDTH = 2; // 二維碼寫碼器 private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); public static void encode(String content, int width, int height, String srcImagePath, String destImagePath) { try { //生成圖片文件 ImageIO.write(genBarcode(content, width, height, srcImagePath), "jpg", new File(destImagePath)); } catch (IOException e) { e.printStackTrace(); } catch (WriterException e) { e.printStackTrace(); } } private static BufferedImage genBarcode(String content, int width, int height, String srcImagePath) throws WriterException, IOException { // 讀取源圖像 BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH, IMAGE_HEIGHT, true); int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT]; for (int i = 0; i < scaleImage.getWidth(); i++) { for (int j = 0; j < scaleImage.getHeight(); j++) { srcPixels[i][j] = scaleImage.getRGB(i, j);//圖片的像素點 } } //編碼 Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 生成二維碼 BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints); // 二維矩陣轉為一維像素數組 int halfW = matrix.getWidth() / 2; int halfH = matrix.getHeight() / 2; int[] pixels = new int[width * height]; for (int y = 0; y < matrix.getHeight(); y++) { for (int x = 0; x < matrix.getWidth(); x++) { // 左上角顏色,根據自己需要調整顏色范圍和顏色 if (x > 0 && x < 170 && y > 0 && y < 170) { Color color = new Color(231, 144, 56); int colorInt = color.getRGB(); pixels[y * width + x] = matrix.get(x, y) ? colorInt : 16777215; } // 讀取圖片 else if (x > halfW - IMAGE_HALF_WIDTH && x < halfW + IMAGE_HALF_WIDTH && y > halfH - IMAGE_HALF_WIDTH && y < halfH + IMAGE_HALF_WIDTH) { pixels[y * width + x] = srcPixels[x - halfW + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH]; } // 在圖片四周形成邊框 else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH - IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH)) { pixels[y * width + x] = 0xfffffff; } else { // 二維碼顏色（RGB） int num1 = (int) (50 - (50.0 - 13.0) / matrix.getHeight() * (y + 1)); int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight() * (y + 1)); int num3 = (int) (162 - (162.0 - 107.0) / matrix.getHeight() * (y + 1)); Color color = new Color(num1, num2, num3); int colorInt = color.getRGB(); // 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色； pixels[y * width + x] = matrix.get(x, y) ? colorInt : 16777215;// 0x000000:0xffffff } } } BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); image.getRaster().setDataElements(0, 0, width, height, pixels); return image; } /** * 把傳入的原始圖像按高度和寬度進行縮放，生成符合要求的圖標 * * @param srcImageFile * 源文件地址 * @param height * 目標高度 * @param width * 目標寬度 * @param hasFiller * 比例不對時是否需要補白：true為補白; false為不補白; * @throws IOException */ private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller) throws IOException { double ratio = 0.0; // 縮放比例 File file = new File(srcImageFile); BufferedImage srcImage = ImageIO.read(file); Image destImage = srcImage.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH); // 計算比例 if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) { if (srcImage.getHeight() > srcImage.getWidth()) { ratio = (new Integer(height)).doubleValue() / srcImage.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / srcImage.getWidth(); } AffineTransformOp op = new AffineTransformOp( AffineTransform.getScaleInstance(ratio, ratio), null); destImage = op.filter(srcImage, null); } if (hasFiller) {// 補白 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D graphic = image.createGraphics(); graphic.setColor(Color.white); graphic.fillRect(0, 0, width, height); if (width == destImage.getWidth(null)) graphic.drawImage(destImage, 0, (height - destImage.getHeight(null)) / 2, destImage.getWidth(null), destImage.getHeight(null), Color.white, null);//畫圖片 else graphic.drawImage(destImage, (width - destImage.getWidth(null)) / 2, 0, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); graphic.dispose(); destImage = image; } return (BufferedImage) destImage; } public static void main(String[] args) throws UnsupportedEncodingException { // 依次為內容(不支持中文),寬,長,logo圖標路徑,儲存路徑 QRCode.encode("http://www.baidu.com/", 512, 512, "D:\\logo.jpg", "D:\\2013-01.jpg"); } } </pre>
本文由用戶 ec3y 自行上傳分享，僅供網友學習交流。所有權歸原作者，若您的權利被侵害，請聯系管理員。
轉載本站原創文章，請注明出處，并保留原始鏈接、圖片水印。
本站是一個以用戶分享為主的開源技術平臺，歡迎各類分享！