In the first install application in my physic device. I am able to download some videos to storage but when I do the same with some more videos it cannot. Then Android Studio IDE announce to me error in line init String downloadURL like title of this question. This is my code:
String youtubeLink = ("https://www.youtube.com/watch?v=" + videoYT.getId().getVideoId());
YouTubeUriExtractor ytEx = new YouTubeUriExtractor(context) {
@Override
public void onUrisAvailable(String videoId, String videoTitle, SparseArray<YtFile> ytFiles) {
if (ytFiles != null) {
int itag = 22;
String downloadURL = ytFiles.get(itag).getUrl();// line where Android Studio IDE gives an error
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(downloadURL));
String title = URLUtil.guessFileName(downloadURL,null,null);
request.setTitle(title);
request.setDescription("Downloading file...");
String cookie = CookieManager.getInstance().getCookie(downloadURL);
request.addRequestHeader("cookie",cookie);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,title);
DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
Toast.makeText(context, "Bắt đầu tải xuống...", Toast.LENGTH_SHORT).show();
}
}
};
ytEx.execute(youtubeLink);
The problem is here ytFiles.get(itag).
In the source code of SparseArray: get() will return null
/**
* Gets the Object mapped from the specified key, or <code>null</code>
* if no such mapping has been made.
*/
public E get(int key) {
return get(key, null);
}
If you use kotlin to implement, you need to modify it to:
val downloadURL = ytFiles.get(itag)?.getUrl() ?: ""
To achieve this with Java, you need to perform a null operation on the ytFiles.get(itag) object.