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This doesn't affect the nullness checker or Kotlin, but it does make weird warnings appear in Android Studio. It seems mildly preferable to have the same spurious warnings in these files that we have in other tests, rather than different spurious warnings. PiperOrigin-RevId: 321173760 |
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ExoPlayer SurfaceControl demo
This app demonstrates how to use the SurfaceControl API to redirect video
output from ExoPlayer between different views or off-screen. SurfaceControl
is new in Android 10, so the app requires minSdkVersion 29.
The app layout has a grid of SurfaceViews. Initially video is output to one
of the views. Tap a SurfaceView to move video output to it. You can also tap
the buttons at the top of the activity to move video output off-screen, to a
full-screen SurfaceView or to a new activity.
When using SurfaceControl, the MediaCodec always has the same surface
attached to it, which can be freely 'reparented' to any SurfaceView (or
off-screen) without any interruptions to playback. This works better than
calling MediaCodec.setOutputSurface to change the output surface of the codec
because MediaCodec does not re-render its last frame when that method is
called, and because you can move output off-screen easily (setOutputSurface
can't take a null surface, so the player has to use a DummySurface, which
doesn't handle protected output on all devices).
Please see the demos README for instructions on how to build and run this demo.