Initial commit
This commit is contained in:
Jenly
211
lib/src/main/java/com/king/zxing/util/CodeUtils.java
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211
lib/src/main/java/com/king/zxing/util/CodeUtils.java
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/*
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* Copyright (C) 2018 Jenly Yu
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.king.zxing.util;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.text.TextUtils;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.EncodeHintType;
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import com.google.zxing.MultiFormatWriter;
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import com.google.zxing.WriterException;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.qrcode.QRCodeWriter;
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @author Jenly <a href="mailto:jenly1314@gmail.com">Jenly</a>
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*/
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public class CodeUtils {
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private CodeUtils(){
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throw new AssertionError();
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}
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/**
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* 生成二维码
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* @param content
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* @param heightPix
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* @return
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*/
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public static Bitmap createQRCode(String content, int heightPix) {
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return createQRCode(content,heightPix,null);
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}
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/**
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* 生成二维码
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* @param content
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* @param heightPix
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* @param logo
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* @return
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*/
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public static Bitmap createQRCode(String content, int heightPix, Bitmap logo) {
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//配置参数
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Map<EncodeHintType, Object> hints = new HashMap<>();
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hints.put( EncodeHintType.CHARACTER_SET, "utf-8");
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//容错级别
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
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//设置空白边距的宽度
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hints.put(EncodeHintType.MARGIN, 1); //default is 4
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return createQRCode(content,heightPix,logo,hints);
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}
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/**
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* 生成二维码
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* @param content
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* @param heightPix
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* @param logo
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* @param hints
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* @return
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*/
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public static Bitmap createQRCode(String content, int heightPix, Bitmap logo,Map<EncodeHintType,?> hints) {
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try {
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// 图像数据转换，使用了矩阵转换
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BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, heightPix, heightPix, hints);
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int[] pixels = new int[heightPix * heightPix];
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// 下面这里按照二维码的算法，逐个生成二维码的图片，
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// 两个for循环是图片横列扫描的结果
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for (int y = 0; y < heightPix; y++) {
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for (int x = 0; x < heightPix; x++) {
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if (bitMatrix.get(x, y)) {
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pixels[y * heightPix + x] = 0xff000000;
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} else {
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pixels[y * heightPix + x] = 0xffffffff;
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}
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}
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}
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// 生成二维码图片的格式
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Bitmap bitmap = Bitmap.createBitmap(heightPix, heightPix, Bitmap.Config.ARGB_8888);
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bitmap.setPixels(pixels, 0, heightPix, 0, 0, heightPix, heightPix);
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if (logo != null) {
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bitmap = addLogo(bitmap, logo);
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}
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return bitmap;
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} catch (WriterException e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 在二维码中间添加Logo图案
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*/
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private static Bitmap addLogo(Bitmap src, Bitmap logo) {
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if (src == null) {
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return null;
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}
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if (logo == null) {
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return src;
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}
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//获取图片的宽高
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int srcWidth = src.getWidth();
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int srcHeight = src.getHeight();
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int logoWidth = logo.getWidth();
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int logoHeight = logo.getHeight();
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if (srcWidth == 0 || srcHeight == 0) {
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return null;
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}
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if (logoWidth == 0 || logoHeight == 0) {
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return src;
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}
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//logo大小为二维码整体大小的1/6
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float scaleFactor = srcWidth * 1.0f / 6 / logoWidth;
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Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight, Bitmap.Config.ARGB_8888);
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try {
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Canvas canvas = new Canvas(bitmap);
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canvas.drawBitmap(src, 0, 0, null);
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canvas.scale(scaleFactor, scaleFactor, srcWidth / 2, srcHeight / 2);
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canvas.drawBitmap(logo, (srcWidth - logoWidth) / 2, (srcHeight - logoHeight) / 2, null);
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canvas.save(Canvas.ALL_SAVE_FLAG);
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canvas.restore();
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} catch (Exception e) {
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bitmap = null;
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e.getStackTrace();
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}
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return bitmap;
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}
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/**
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* 生成条形码
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* @param content
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* @param format
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* @param desiredWidth
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* @param desiredHeight
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* @return
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*/
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public static Bitmap createBarCode(String content,BarcodeFormat format, int desiredWidth, int desiredHeight) {
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return createBarCode(content,format,desiredWidth,desiredHeight,null);
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}
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/**
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* 生成条形码
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* @param content
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* @param format
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* @param desiredWidth
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* @param desiredHeight
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* @param hints
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* @return
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*/
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public static Bitmap createBarCode(String content,BarcodeFormat format, int desiredWidth, int desiredHeight,Map<EncodeHintType,?> hints) {
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if(TextUtils.isEmpty(content)){
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return null;
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}
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final int WHITE = 0xFFFFFFFF;
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final int BLACK = 0xFF000000;
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MultiFormatWriter writer = new MultiFormatWriter();
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try {
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BitMatrix result = writer.encode(content, format, desiredWidth,
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desiredHeight, hints);
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int width = result.getWidth();
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int height = result.getHeight();
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int[] pixels = new int[width * height];
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// All are 0, or black, by default
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for (int y = 0; y < height; y++) {
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int offset = y * width;
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for (int x = 0; x < width; x++) {
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pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
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}
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}
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Bitmap bitmap = Bitmap.createBitmap(width, height,
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Bitmap.Config.ARGB_8888);
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bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
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return bitmap;
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} catch (WriterException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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