1.先導入函示庫(build.gradle: Module)

dependencies {
     implementation 'com.contrarywind:Android-PickerView:4.1.9'
}

2.設定條碼格式以及大小

private fun barcodeFormatCode(num: String) : Bitmap {
    val barcode = BarcodeFormat.CODE_128
    val matrix = MultiFormatWriter().encode(num, barcode, 800, 160, null)
    return bitMatrixToBitmap(matrix)
}

3.創建條碼的圖片

private fun bitMatrixToBitmap(matrix: BitMatrix) : Bitmap {
    val w = matrix.width;
    val h = matrix.height;
    val rawData = IntArray(w * h)

    for (i in 0 until w) {
        for (j in 0 until h) {
            var color = Color.WHITE;
            if (matrix.get(i, j)) {
                // 有内容的部分，颜色设置为黑色，可以自己修改成其他颜色
                color = Color.BLACK;
            }
            rawData[i + (j * w)] = color;
        }
    }

    val bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(rawData, 0, w, 0, 0, w, h);
    return bitmap;
}

5.調用方法並設置到ImageView上

barcode.setImageBitmap(barcodeFormatCode("123123"))

6.效果展示