Android:从YouTubePlayer地址获取youtubeVideo Id

public String extractVideoId(String youtubeUrl) {
    String videoId = null;
    if (youtubeUrl != null && youtubeUrl.trim().length() > 0) {
        String expression = "(?<=watch\\?v=|/videos/|embed\\/|youtu.be\\/|\\/v\\/|\\/e\\/|watch\\?v%3D|watch\\?feature=player_embedded&v=|%2Fvideos%2F|embed%\u200C\u200B2F|youtu.be%2F|\\/v%2F|e%u200C\u200B\\%2F|watch\\?v=|watch\\?feature=player_embedded&v=|embed\\u200C\u200Bvideoseries\\?list=)([^#\\&\\?\\n]*?)";
        CharSequence input = youtubeUrl;
        Pattern pattern = Pattern.compile(expression, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(input);
        if (matcher.find()) {
            videoId = matcher.group(1);
        }
    }
    return videoId;
}

String youtubeUrl = "https://www.youtube.com/watch?v=dQw4w9WgXcQ";
String videoId = extractVideoId(youtubeUrl);
System.out.println("Video ID: " + videoId);