package com.zhaoyang.driver.utils;
|
|
import android.content.Context;
|
import android.graphics.Bitmap;
|
import android.graphics.BitmapFactory;
|
import android.graphics.Canvas;
|
import android.graphics.Color;
|
import android.text.TextUtils;
|
|
import androidx.annotation.ColorInt;
|
import androidx.annotation.Nullable;
|
|
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 java.io.File;
|
import java.util.HashMap;
|
import java.util.Hashtable;
|
import java.util.Map;
|
|
import static com.zhaoyang.driver.utils.BitmapUtil.bitmap2File;
|
|
public class QRCodeUtil {
|
|
/**
|
* 创建二维码位图
|
*
|
* @param content 字符串内容(支持中文)
|
* @param width 位图宽度(单位:px)
|
* @param height 位图高度(单位:px)
|
* @return
|
*/
|
@Nullable
|
public static Bitmap createQRCodeBitmap(String content, int width, int height){
|
return createQRCodeBitmap(content, width, height, "UTF-8", "H", "2", Color.BLACK, Color.WHITE);
|
}
|
|
/**
|
* 创建二维码位图 (支持自定义配置和自定义样式)
|
*
|
* @param content 字符串内容
|
* @param width 位图宽度,要求>=0(单位:px)
|
* @param height 位图高度,要求>=0(单位:px)
|
* @param margin 空白边距 (可修改,要求:整型且>=0), 传null时,zxing源码默认使用"4"。
|
* @param color_black 黑色色块的自定义颜色值
|
* @param color_white 白色色块的自定义颜色值
|
* @return
|
*/
|
@Nullable
|
public static Bitmap createQRCodeBitmap(String content, int width, int height,
|
@Nullable String character_set, @Nullable String error_correction, @Nullable String margin,
|
@ColorInt int color_black, @ColorInt int color_white){
|
|
/** 1.参数合法性判断 */
|
if(TextUtils.isEmpty(content)){ // 字符串内容判空
|
return null;
|
}
|
|
if(width < 0 || height < 0){ // 宽和高都需要>=0
|
return null;
|
}
|
|
try {
|
/** 2.设置二维码相关配置,生成BitMatrix(位矩阵)对象 */
|
Hashtable<EncodeHintType, String> hints = new Hashtable<>();
|
|
if(!TextUtils.isEmpty(character_set)) {
|
hints.put(EncodeHintType.CHARACTER_SET, character_set); // 字符转码格式设置
|
}
|
|
if(!TextUtils.isEmpty(error_correction)){
|
hints.put(EncodeHintType.ERROR_CORRECTION, error_correction); // 容错级别设置
|
}
|
|
if(!TextUtils.isEmpty(margin)){
|
hints.put(EncodeHintType.MARGIN, margin); // 空白边距设置
|
}
|
BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
|
|
/** 3.创建像素数组,并根据BitMatrix(位矩阵)对象为数组元素赋颜色值 */
|
int[] pixels = new int[width * height];
|
for(int y = 0; y < height; y++){
|
for(int x = 0; x < width; x++){
|
if(bitMatrix.get(x, y)){
|
pixels[y * width + x] = color_black; // 黑色色块像素设置
|
} else {
|
pixels[y * width + x] = color_white; // 白色色块像素设置
|
}
|
}
|
}
|
|
/** 4.创建Bitmap对象,根据像素数组设置Bitmap每个像素点的颜色值,之后返回Bitmap对象 */
|
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
|
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
|
return bitmap;
|
} catch (WriterException e) {
|
e.printStackTrace();
|
}
|
|
return null;
|
}
|
|
|
public static Bitmap createQRImage(String content, int heightPix, int resouse,Context context) {
|
try {
|
//配置参数
|
Bitmap str = getShareIconPath(context,resouse);
|
Map<EncodeHintType, Object> hints = new HashMap<>();
|
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, heightPix, heightPix, hints);
|
int[] pixels = new int[heightPix * 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 < heightPix; x++) {
|
if (bitMatrix.get(x, y)) {
|
pixels[y * heightPix + x] = 0xff000000;
|
} else {
|
pixels[y * heightPix + x] = 0xffffffff;
|
}
|
}
|
}
|
|
// 生成二维码图片的格式，使用ARGB_8888
|
Bitmap bitmap = Bitmap.createBitmap(heightPix, heightPix, Bitmap.Config.ARGB_8888);
|
bitmap.setPixels(pixels, 0, heightPix, 0, 0, heightPix, heightPix);
|
|
if (str != null) {
|
bitmap = addLogo(bitmap, str);
|
}
|
|
//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;
|
} catch (WriterException e) {
|
e.printStackTrace();
|
}
|
|
return null;
|
}
|
|
|
public static Bitmap getShareIconPath(Context context, int resourse) {
|
Bitmap thumbBmp = BitmapFactory.decodeResource(context.getResources(),resourse);
|
|
return thumbBmp;
|
}
|
|
/**
|
* 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.restore();
|
} catch (Exception e) {
|
bitmap = null;
|
e.getStackTrace();
|
}
|
|
return bitmap;
|
}
|
}
|
