1f3f22a709
The current API exposes an `ImmutableMap` of `TrackGroup` -> `TrackSelectionOverride`. This has several disadvantages: - A difficult to use API for mutation (`ImmutableMap.Builder` doesn't support key removal). - There is no track selection specific methods, how the generic map API mapps to the selection override is not complex but to obvious for a casual reader. - The internal data type is exposed, making internal refactor difficult. This was done to have the API ready as quick as possible. When transitioning the clients to the map API in <unknown commit>, it became clear that the map API was too verbose and not mapping to the clients needs, so utility methods were added to make operations clearer and more concise. Nevertheless, having to use utility method to use easily and correctly an API is not the sign of a good API. This cl refactors the track selection API for several improvements: - Add a type `TrackSelectionParameters` that encapsulate the internal data structure (map currently). - For iteration, expose as a list. - Add a `Builder` for easy mutable operations. - Add track selection specific methods to avoid having utilities functions. - Those operations are the same as `DefaultTrackSelector.Parameters` for easier migration. (`setOverride` was renamed to `addOverride`) - Move `TrackSelection` classes outside of `TrackSelectionParameters` as their own top level classes. The migration of the client code is straightforward as most of it were already using the previously mentioned utility functions that are now native methods. The full migration has not been done yet, and is pending on this cl approval. PiperOrigin-RevId: 405362719
ExoPlayer 
ExoPlayer is an application level media player for Android. It provides an alternative to Android’s MediaPlayer API for playing audio and video both locally and over the Internet. ExoPlayer supports features not currently supported by Android’s MediaPlayer API, including DASH and SmoothStreaming adaptive playbacks. Unlike the MediaPlayer API, ExoPlayer is easy to customize and extend, and can be updated through Play Store application updates.
Documentation
- The developer guide provides a wealth of information.
- The class reference documents ExoPlayer classes.
- The release notes document the major changes in each release.
- Follow our developer blog to keep up to date with the latest ExoPlayer developments!
Using ExoPlayer
ExoPlayer modules can be obtained from the Google Maven repository. It's also possible to clone the repository and depend on the modules locally.
From the Google Maven repository
1. Add ExoPlayer module dependencies
The easiest way to get started using ExoPlayer is to add it as a gradle
dependency in the build.gradle file of your app module. The following will add
a dependency to the full library:
implementation 'com.google.android.exoplayer:exoplayer:2.X.X'
where 2.X.X is your preferred version.
As an alternative to the full library, you can depend on only the library modules that you actually need. For example the following will add dependencies on the Core, DASH and UI library modules, as might be required for an app that only plays DASH content:
implementation 'com.google.android.exoplayer:exoplayer-core:2.X.X'
implementation 'com.google.android.exoplayer:exoplayer-dash:2.X.X'
implementation 'com.google.android.exoplayer:exoplayer-ui:2.X.X'
When depending on individual modules they must all be the same version.
The available library modules are listed below. Adding a dependency to the full ExoPlayer library is equivalent to adding dependencies on all of the library modules individually.
exoplayer-core: Core functionality (required).exoplayer-dash: Support for DASH content.exoplayer-hls: Support for HLS content.exoplayer-rtsp: Support for RTSP content.exoplayer-smoothstreaming: Support for SmoothStreaming content.exoplayer-transformer: Media transformation functionality.exoplayer-ui: UI components and resources for use with ExoPlayer.
In addition to library modules, ExoPlayer has extension modules that depend on external libraries to provide additional functionality. Some extensions are available from the Maven repository, whereas others must be built manually. Browse the extensions directory and their individual READMEs for details.
More information on the library and extension modules that are available can be found on the Google Maven ExoPlayer page.
2. Turn on Java 8 support
If not enabled already, you also need to turn on Java 8 support in all
build.gradle files depending on ExoPlayer, by adding the following to the
android section:
compileOptions {
targetCompatibility JavaVersion.VERSION_1_8
}
3. Enable multidex
If your Gradle minSdkVersion is 20 or lower, you should
enable multidex in order
to prevent build errors.
Locally
Cloning the repository and depending on the modules locally is required when using some ExoPlayer extension modules. It's also a suitable approach if you want to make local changes to ExoPlayer, or if you want to use a development branch.
First, clone the repository into a local directory and checkout the desired branch:
git clone https://github.com/google/ExoPlayer.git
cd ExoPlayer
git checkout release-v2
Next, add the following to your project's settings.gradle file, replacing
path/to/exoplayer with the path to your local copy:
gradle.ext.exoplayerModulePrefix = 'exoplayer-'
apply from: file("path/to/exoplayer/core_settings.gradle")
You should now see the ExoPlayer modules appear as part of your project. You can depend on them as you would on any other local module, for example:
implementation project(':exoplayer-library-core')
implementation project(':exoplayer-library-dash')
implementation project(':exoplayer-library-ui')
Developing ExoPlayer
Project branches
- Development work happens on the
dev-v2branch. Pull requests should normally be made to this branch. - The
release-v2branch holds the most recent release.
Using Android Studio
To develop ExoPlayer using Android Studio, simply open the ExoPlayer project in the root directory of the repository.