Question

我正在尝试在TextView内获取特定值，即Youtube链接。

我想只提取例如TextView的链接，其中包含“Check this out！（Youtube link here）”。 “检查出来！”需要省略，只获取Youtube链接。 TextView是用户输入的，因此会有所不同。

有什么建议吗？

Answer 1

你可以试试这个

You can use regular expression with Patterns.WEB_URL regular expression to find all urls in your text.

Answer 2

从@BullyWiiPlaza answer

尝试此方法

public static String extractYouTubeUrl(String text)
{
    String urlRegex = "((https?|ftp|gopher|telnet|file):((//)|(\\\\))+[\\w\\d:#@%/;$()~_?\\+-=\\\\\\.&]*)";
    Pattern pattern = Pattern.compile(urlRegex, Pattern.CASE_INSENSITIVE);
    Matcher urlMatcher = pattern.matcher(text);

    while (urlMatcher.find())
    {
       String url = text.substring(urlMatcher.start(0),
                urlMatcher.end(0))
       if(url.contains("youtube.com")
        return url;
    }    
    return "";
}

如何使用它：

String stringWithYouTubeUrl = tvWithYouTubeUrl.getText().toString();
String youTubeUrl = extractYouTubeUrl(stringWithYouTubeUrl);

Log.d(TAG, "youTubeUrl is" + youTubeUrl);

希望它有所帮助!!

Answer 3

你可以尝试一下：

String textViewStr = "Check this out! (Youtube link)";
int pos_1 = textViewStr.indexOf('(');
int pos_2 = textViewStr.indexOf(')');

String result = textViewStr.substring(pos_1+1,pos_2);
System.out.println(result); // print: Youtube link

<强>更新：

String textViewStr = "asdf Check this out! https://www.youtube.com/ asdg asfgf https:!!";
String [] arrStr = textViewStr.split(" ");
String regex = "/(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=‌|watch\?.+&v=))((\w|-){11})(?:\S+)?$/g";
Pattern p = Pattern.compile(regex,Pattern.DOTALL);

        for(int i = 0 ; i < arrStr.length ; ++i){
            Matcher m = m = p.matcher(arrStr[i]);
            if ( m.matches() )
                Log.d("Matcher", "PATTERN MATCHES! " + arrStr[i]);
            else
                Log.d("MATCHER", "PATTERN DOES NOT MATCH! : " + arrStr[i]);
        }

此印刷品：

D/MATCHER: PATTERN DOES NOT MATCH! : asdf
D/MATCHER: PATTERN DOES NOT MATCH! : Check
D/MATCHER: PATTERN DOES NOT MATCH! : this
D/MATCHER: PATTERN DOES NOT MATCH! : out!
D/Matcher: PATTERN MATCHES! https://www.youtube.com/
D/MATCHER: PATTERN DOES NOT MATCH! : asdg
D/MATCHER: PATTERN DOES NOT MATCH! : asfgf
D/MATCHER: PATTERN DOES NOT MATCH! : https:!!s

Answer 4

YouTube链接语法为https://www.youtube.com/watch?v=<value>。你真正需要的是v=<value>。只需搜索整个字符串“watch?”，如果之后有v=，则只需取值并从中创建整个网址。

Android - 从TextView获取特定文本

4 个答案: