Constructor Detail

• SegmentDownloader

  public SegmentDownloader​(MediaItem mediaItem,
                           ParsingLoadable.Parser<M> manifestParser,
                           CacheDataSource.Factory cacheDataSourceFactory,
                           Executor executor)

  Parameters:

  mediaItem - The MediaItem to be downloaded.

  manifestParser - A parser for manifests belonging to the media to be downloaded.

  cacheDataSourceFactory - A CacheDataSource.Factory for the cache into which the download will be written.

  executor - An Executor used to make requests for the media being downloaded. Providing an Executor that uses multiple threads will speed up the download by allowing parts of it to be executed in parallel.

Method Detail

• download

  public final void download​(@Nullable
                             Downloader.ProgressListener progressListener)
                      throws IOException,
                             InterruptedException

  Description copied from interface: Downloader
  Downloads the content.

  If downloading fails, this method can be called again to resume the download. It cannot be called again after the download has been canceled.

  If downloading is canceled whilst this method is executing, then it is expected that it will return reasonably quickly. However, there are no guarantees about how the method will return, meaning that it can return without throwing, or by throwing any of its documented exceptions. The caller must use its own knowledge about whether downloading has been canceled to determine whether this is why the method has returned, rather than relying on the method returning in a particular way.

  Specified by:

  download in interface Downloader

  Parameters:

  progressListener - A listener to receive progress updates, or null.

  Throws:

  IOException - If the download failed to complete successfully.

  InterruptedException - If the download was interrupted.

• cancel

  public void cancel()

  Description copied from interface: Downloader
  Permanently cancels the downloading by this downloader. The caller should also interrupt the downloading thread immediately after calling this method.

  Once canceled, Downloader.download(com.google.android.exoplayer2.offline.Downloader.ProgressListener) cannot be called again.

  Specified by:

  cancel in interface Downloader

• remove

  public final void remove()

  Description copied from interface: Downloader
  Removes the content.

  Specified by:

  remove in interface Downloader

• getManifest

  protected final M getManifest​(DataSource dataSource,
                                DataSpec dataSpec,
                                boolean removing)
                         throws InterruptedException,
                                IOException

  Loads and parses a manifest.

  Parameters:

  dataSpec - The manifest DataSpec.

  removing - Whether the manifest is being loaded as part of the download being removed.

  Returns:

  The loaded manifest.

  Throws:

  InterruptedException - If the thread on which the method is called is interrupted.

  IOException - If an error occurs during execution.

• execute

  protected final <T> T execute​(RunnableFutureTask<T,​?> runnable,
                                boolean removing)
                         throws InterruptedException,
                                IOException

  Executes the provided RunnableFutureTask.

  Parameters:

  runnable - The RunnableFutureTask to execute.

  removing - Whether the execution is part of the download being removed.

  Returns:

  The result.

  Throws:

  InterruptedException - If the thread on which the method is called is interrupted.

  IOException - If an error occurs during execution.

• getSegments

  protected abstract List<SegmentDownloader.Segment> getSegments​(DataSource dataSource,
                                                                 M manifest,
                                                                 boolean removing)
                                                          throws IOException,
                                                                 InterruptedException

  Returns a list of all downloadable SegmentDownloader.Segments for a given manifest. Any required data should be loaded using getManifest(com.google.android.exoplayer2.upstream.DataSource, com.google.android.exoplayer2.upstream.DataSpec, boolean) or execute(com.google.android.exoplayer2.util.RunnableFutureTask<T, ?>, boolean).

  Parameters:

  dataSource - The DataSource through which to load any required data.

  manifest - The manifest containing the segments.

  removing - Whether the segments are being obtained as part of a removal. If true then a partial segment list is returned in the case that a load error prevents all segments from being listed. If false then an IOException will be thrown in this case.

  Returns:

  The list of downloadable SegmentDownloader.Segments.

  Throws:

  IOException - Thrown if allowPartialIndex is false and an execution error occurs, or if the media is not in a form that allows for its segments to be listed.

  InterruptedException

• getCompressibleDataSpec

  protected static DataSpec getCompressibleDataSpec​(Uri uri)