Android 生成二维码 需要zxing-core.jar

new_gist_file

/**
   * 用字符串生成二维码
	 * @param str
	 * @author zhouzhe@lenovo-cw.com
	 * @return
	 * @throws WriterException
	 */
	public static Bitmap create2DCode(String str) throws WriterException {
		//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(str,BarcodeFormat.QR_CODE, 300, 300);
		int width = matrix.getWidth();
		int height = matrix.getHeight();
		//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[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;
				}
				
			}
		}
		
		Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
		//通过像素数组生成bitmap,具体参考api
		bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
		return bitmap;
	}