BitmapLoader	Loads images.
Clock	An interface through which system clocks can be read and HandlerWrappers created.
Consumer<T>	Represents an operation that accepts a single input argument and returns no result.
EGLSurfaceTexture.TextureImageListener	Listener to be called when the texture image on `SurfaceTexture` has been updated.
HandlerWrapper	An interface to call through to a `Handler`.
HandlerWrapper.Message	A message obtained from the handler.
ListenerSet.Event<T>	An event sent to a listener.
ListenerSet.IterationFinishedEvent<T>	An event sent to a listener when all other events sent during one message queue iteration were handled by the listener.
Log.Logger	Interface for a logger that can output messages with a tag.
NetworkTypeObserver.Listener	A listener for network type changes.
TimestampConsumer	A consumer for long timestamp values.
TimestampIterator	A primitive long iterator used for generating sequences of timestamps.

Assertions	Provides methods for asserting the truth of expressions and properties.
AtomicFile	A helper class for performing atomic operations on a file by creating a backup file until a write has successfully completed.
BundleableUtil	Utilities for Bundleable.
BundleCollectionUtil	Utilities for converting collections to and from instances.
BundleUtil	Utilities for .
CodecSpecificDataUtil	Provides utilities for handling various types of codec-specific data.
ColorParser	Parser for color expressions found in styling formats, e.g.
ConditionVariable	An interruptible condition variable.
ConstantRateTimestampIterator	A TimestampIterator that generates monotonically increasing timestamps (in microseconds) distributed evenly over the given durationUs based on the given frameRate.
CopyOnWriteMultiset<E>	An unordered collection of elements that allows duplicates, but also allows access to a set of unique elements.
EGLSurfaceTexture	Generates a `SurfaceTexture` using EGL/GLES functions.
GlProgram	Represents a GLSL shader program.
GlRect	Represents a rectangle by the coordinates of its 4 edges (left, bottom, right, top).
GlUtil	OpenGL ES utilities.
LibraryLoader	Configurable loader for native libraries.
ListenerSet<T>	A set of listeners.
Log	Wrapper around which allows to set the log level and to specify a custom log output.
LongArray	An append-only, auto-growing long[].
LongArrayQueue	Array-based unbounded queue for long primitives with amortized O(1) add and remove.
MediaFormatUtil	Helper class containing utility methods for managing instances.
NetworkTypeObserver	Observer for network type changes.
NotificationUtil	Utility methods for displaying `Notifications`.
ParsableBitArray	Wraps a byte array, providing methods that allow it to be read as a bitstream.
ParsableByteArray	Wraps a byte array, providing a set of methods for parsing data from it.
RepeatModeUtil	Util class for repeat mode handling.
RunnableFutureTask<R, E>	A `java.util.concurrent.RunnableFuture` that supports additional uninterruptible operations to query whether execution has started and finished.
Size	Immutable class for describing width and height dimensions in pixels.
SpeedProviderUtil	Utilities for SpeedProvider.
SystemClock	The standard implementation of Clock, an instance of which is available via Clock.DEFAULT.
TimedValueQueue<V>	A utility class to keep a queue of values with timestamps.
TimestampAdjuster	Adjusts and offsets sample timestamps.
TraceUtil	Calls through to methods if MediaLibraryInfo.TRACE_ENABLED is true.
UriUtil	Utility methods for manipulating URIs.
Util	Miscellaneous utility methods.
XmlPullParserUtil	utility methods.

EGLSurfaceTexture.SecureMode	Secure mode to be used by the EGL surface and context.
Log.LogLevel	Log level for ExoPlayer logcat logging.
NonNullApi	Annotation to declare all type usages in the annotated instance as , unless explicitly marked with a nullable annotation.
NotificationUtil.Importance	Notification channel importance levels.
NullableType	Annotation for specifying a nullable type.
RepeatModeUtil.RepeatToggleModes	Set of repeat toggle modes.
UnknownNull	Annotation for specifying unknown nullness.
UnstableApi	Signifies that a public API (class, method or field) is subject to incompatible changes, or even removal, in a future release.