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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;
}
}
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