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MediaSessionConnector: Document how to provide metadata asynchronously

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Issue: #6047
PiperOrigin-RevId: 255992898
This commit is contained in:
bachinger 2019-07-01 19:13:03 +01:00 committed by Oliver Woodman
parent 7798c07f64
commit 259bea1652
1 changed files with 7 additions and 0 deletions
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7
extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java
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@ -378,6 +378,13 @@ public final class MediaSessionConnector {
/** /**
* Gets the {@link MediaMetadataCompat} to be published to the session. * Gets the {@link MediaMetadataCompat} to be published to the session.
* *
* <p>An app may need to load metadata resources like artwork bitmaps asynchronously. In such a
* case the app should return a {@link MediaMetadataCompat} object that does not contain these
* resources as a placeholder. The app should start an asynchronous operation to download the
* bitmap and put it into a cache. Finally, the app should call {@link
* #invalidateMediaSessionMetadata()}. This causes this callback to be called again and the app
* can now return a {@link MediaMetadataCompat} object with all the resources included.
*
* @param player The player connected to the media session. * @param player The player connected to the media session.
* @return The {@link MediaMetadataCompat} to be published to the session. * @return The {@link MediaMetadataCompat} to be published to the session.
*/ */