Youtube 视频下载 (Android/Java)

Question

注意：原问题已删除

原始问题是https://stackoverflow.com/questions/15240011/get-the-download-url-for-youtube-video-android-java/15240012#15240012

这里的答案已经过时，不起作用，所以我会发布一个新问题并回答我自己

旧代码

new YouTubePageStreamUriGetter().execute("https://www.youtube.com/watch?v=4GuqB1BQVr4");

class Meta {

    public String num;

    public String type;

    public String ext;

    Meta(String num, String ext, String type) {

        this.num = num;

        this.ext = ext;

        this.type = type;

    }

}

class Video {

    public String ext = "";

    public String type = "";

    public String url = "";

    Video(String ext, String type, String url) {

        this.ext = ext;

        this.type = type;

        this.url = url;

    }

}

public ArrayList<Video> getStreamingUrisFromYouTubePage(String ytUrl)

        throws IOException {

    if (ytUrl == null) {

        return null;

    }

    // Remove any query params in query string after the watch?v=<vid> in

    // e.g.

    // http://www.youtube.com/watch?v=0RUPACpf8Vs&feature=youtube_gdata_player

    int andIdx = ytUrl.indexOf('&');

    if (andIdx >= 0) {

        ytUrl = ytUrl.substring(0, andIdx);

    }

    // Get the HTML response

    String userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0.1)";

    HttpClient client = new DefaultHttpClient();

    client.getParams().setParameter(CoreProtocolPNames.USER_AGENT,

            userAgent);

    HttpGet request = new HttpGet(ytUrl);

    HttpResponse response = client.execute(request);

    String html = "";

    InputStream in = response.getEntity().getContent();

    BufferedReader reader = new BufferedReader(new InputStreamReader(in));

    StringBuilder str = new StringBuilder();

    String line = null;

    while ((line = reader.readLine()) != null) {

        str.append(line.replace("\\u0026", "&"));

    }

    in.close();

    html = str.toString();

    // Parse the HTML response and extract the streaming URIs

    if (html.contains("verify-age-thumb")) {

        CLog.w("YouTube is asking for age verification. We can't handle that sorry.");

        return null;

    }

此代码不起作用