android使用Zxing庫實現二維碼的生成
一、匯入ZXing.jar包
二、建立生成二維碼的方法
public static Bitmap Create2DCode(String str) throws WriterException {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
// hints.put(EncodeHintType.DATA_MATRIX_SHAPE,
// SymbolShapeHint.FORCE_SQUARE);
hints.put(EncodeHintType.MARGIN, 0);
// 生成二維矩陣,編碼時指定大小,不要生成了圖片以後再進行縮放,這樣會模糊導致識別失敗
BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, 300, 300, hints);
int width = matrix.getWidth();
int height = matrix.getHeight();
// 二維矩陣轉為一維畫素陣列,也就是一直橫著排了
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (matrix.get(x, y)) {
pixels[y * width + x] = 0xff000000;
} else {
pixels[y * width + x] = 0xffffffff;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
// 通過畫素陣列生成bitmap,具體參考api
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}