It doesn't matter, but the language I'm using is kotlin.

my get video Id code

fun getVideoIdFromYoutubeUrl(url: String?): String? {
        var videoId: String? = null
        val regex =
            "(?:https?:\\/\\/)?(?:www\\.)?youtu(?:\\.be\\/|be.com\\/\\S*(?:watch|shorts)(?:(?:(?=\\/[-a-zA-Z0-9_]{11,}(?!\\S))\\/)|(?:\\S*v=|v\\/)))([-a-zA-Z0-9_]{11,})"
           // "http(?:s)?:\\/\\/(?:m.)?(?:www\\.)?youtu(?:\\.be\\/|be\\.com\\/(?:watch\\?(?:feature=youtu.be\\&)?v=|v\\/|embed\\/|user\\/(?:[\\w#] \\/) ))([^&#?\\n] )"

        val pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE)
        val matcher = pattern.matcher(url)
        if (matcher.find()) {
            videoId = matcher.group(1)
        }

        return videoId
    }

test youtube shots url

https://youtube.com/shorts/IC7M4up0FOI?feature=share

But when I do it with that regular expression, null is returned.

On the other hand, this url works just fine.

https://www.youtube.com/shorts/YK1po3GW9oY

what do i need to fix?

CodePudding user response：

To extract the video ID from a YouTube URL in Kotlin, you can use the following code:

val url = "https://www.youtube.com/watch?v=dQw4w9WgXcQ"
var videoId = ""

if (url.contains("youtube.com")) {
    if (url.contains("watch")) {
        videoId = url.substring(url.indexOf("v=")   2)
        if (videoId.contains("&")) {
            videoId = videoId.substring(0, videoId.indexOf("&"))
        }
    } else if (url.contains("embed")) {
        videoId = url.substring(url.lastIndexOf("/")   1)
    } else if (url.contains("v/")) {
        videoId = url.substring(url.indexOf("v/")   2)
        if (videoId.contains("?")) {
            videoId = videoId.substring(0, videoId.indexOf("?"))
        }
    }
}

println("Video ID: $videoId")

CodePudding user response：

How about this?

fun extractVideoId(url: String): String? {
    val pattern = "(?<=(v|V)/|(be/)|(?<=embed/)|(?<=watch\\?v=))([\\w-]  )"
    val matcher = Regex(pattern).toPattern().matcher(url)
    return if (matcher.find()) matcher.group() else null
}