CodeCreator.java
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package com.yzq.zxinglibrary.encode;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.text.TextUtils;
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;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.util.Hashtable;
public class CodeCreator {
/*生成二维码*/
public static Bitmap createQRCode(String content, int w, int h,Bitmap logo) throws WriterException {
if (TextUtils.isEmpty(content)) {
return null;
}
/*偏移量*/
int offsetX = w / 2;
int offsetY = h / 2;
/*生成logo*/
Bitmap logoBitmap=null;
if (logo!=null){
Matrix matrix = new Matrix();
float scaleFactor = Math.min(w * 1.0f / 5 / logo.getWidth(), h * 1.0f / 5 /logo.getHeight());
matrix.postScale(scaleFactor,scaleFactor);
logoBitmap= Bitmap.createBitmap(logo, 0, 0, logo.getWidth(), logo.getHeight(), matrix, true);
}
/*如果log不为null,重新计算偏移量*/
int logoW = 0;
int logoH = 0;
if (logoBitmap != null) {
logoW = logoBitmap.getWidth();
logoH = logoBitmap.getHeight();
offsetX = (w - logoW) / 2;
offsetY = (h - logoH) / 2;
}
/*指定为UTF-8*/
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
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, 0);
// 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
BitMatrix matrix = new MultiFormatWriter().encode(content,
BarcodeFormat.QR_CODE, w, h, hints);
// 二维矩阵转为一维像素数组,也就是一直横着排了
int[] pixels = new int[w * h];
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
if(x >= offsetX && x < offsetX + logoW && y>= offsetY && y < offsetY + logoH){
int pixel = logoBitmap.getPixel(x-offsetX,y-offsetY);
if(pixel == 0){
if(matrix.get(x, y)){
pixel = 0xff000000;
}else{
pixel = 0xffffffff;
}
}
pixels[y * w + x] = pixel;
}else{
if (matrix.get(x, y)) {
pixels[y * w + x] = 0xff000000;
} else {
pixels[y * w + x] = 0xffffffff;
}
}
}
}
Bitmap bitmap = Bitmap.createBitmap(w, h,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, w, 0, 0, w, h);
return bitmap;
}
}