字符串生成二维码

implementation "com.google.zxing:core:3.3.2"
implementation "com.journeyapps:zxing-android-embedded:3.6.0"

fun createQRImage(
    content: String?, widthPix: Int, heightPix: Int
): Bitmap? {
    try {
        val hints = HashMap<EncodeHintType, Any>()
        hints[EncodeHintType.CHARACTER_SET] = StandardCharsets.UTF_8.name()
        hints[EncodeHintType.ERROR_CORRECTION] = ErrorCorrectionLevel.L
        hints[EncodeHintType.MARGIN] = 1

        var bitMatrix: BitMatrix? = null
        try {
            bitMatrix = QRCodeWriter().encode(
                content, BarcodeFormat.QR_CODE, widthPix,
                heightPix, hints
            )
           /* bitMatrix = MultiFormatWriter().encode(
                content, BarcodeFormat.QR_CODE, widthPix, heightPix, hints
            )*/

        } catch (e: WriterException) {
            "createQRImage WriterException=$e".logD("ljj")

        }
        val pixels = IntArray(widthPix * heightPix)
        for (y in 0 until heightPix) {
            for (x in 0 until widthPix) {
                if (bitMatrix != null) {
                    if (bitMatrix.get(x, y)) {
                        pixels[y * widthPix + x] = -0x1000000
                    } else {
                        pixels[y * widthPix + x] = -0x1
                    }
                } else {
                    return null
                }
            }
        }
        val bitmap: Bitmap? = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888)
        bitmap!!.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix)
        return bitmap
    } catch (e: Exception) {
        "createQRImage Exception=$e".logD("ljj")
    }
    return null
}