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# ExoPlayer #
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ExoPlayer is an application level media player for Android. It provides an
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alternative to Android’s MediaPlayer API for playing audio and video both
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locally and over the Internet. ExoPlayer supports features not currently
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supported by Android’s MediaPlayer API, including DASH and SmoothStreaming
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adaptive playbacks. Unlike the MediaPlayer API, ExoPlayer is easy to customize
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and extend, and can be updated through Play Store application updates.
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## Documentation ##
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* The [developer guide][] provides a wealth of information.
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* The [class reference][] documents ExoPlayer classes.
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* The [release notes][] document the major changes in each release.
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* Follow our [developer blog][] to keep up to date with the latest ExoPlayer
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developments!
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[developer guide]: https://exoplayer.dev/guide.html
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[class reference]: https://exoplayer.dev/doc/reference
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[release notes]: https://github.com/google/ExoPlayer/blob/release-v2/RELEASENOTES.md
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[developer blog]: https://medium.com/google-exoplayer
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## Using ExoPlayer ##
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ExoPlayer modules can be obtained from JCenter. It's also possible to clone the
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repository and depend on the modules locally.
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### From JCenter ###
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#### 1. Add repositories ####
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The easiest way to get started using ExoPlayer is to add it as a gradle
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dependency. You need to make sure you have the Google and JCenter repositories
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included in the `build.gradle` file in the root of your project:
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```gradle
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repositories {
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google()
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jcenter()
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}
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```
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#### 2. Add ExoPlayer module dependencies ####
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Next add a dependency in the `build.gradle` file of your app module. The
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following will add a dependency to the full library:
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```gradle
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implementation 'com.google.android.exoplayer:exoplayer:2.X.X'
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```
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where `2.X.X` is your preferred version.
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As an alternative to the full library, you can depend on only the library
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modules that you actually need. For example the following will add dependencies
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on the Core, DASH and UI library modules, as might be required for an app that
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plays DASH content:
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```gradle
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implementation 'com.google.android.exoplayer:exoplayer-core:2.X.X'
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implementation 'com.google.android.exoplayer:exoplayer-dash:2.X.X'
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implementation 'com.google.android.exoplayer:exoplayer-ui:2.X.X'
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```
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The available library modules are listed below. Adding a dependency to the full
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library is equivalent to adding dependencies on all of the library modules
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individually.
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* `exoplayer-core`: Core functionality (required).
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* `exoplayer-dash`: Support for DASH content.
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* `exoplayer-hls`: Support for HLS content.
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* `exoplayer-smoothstreaming`: Support for SmoothStreaming content.
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* `exoplayer-ui`: UI components and resources for use with ExoPlayer.
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In addition to library modules, ExoPlayer has multiple extension modules that
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depend on external libraries to provide additional functionality. Some
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extensions are available from JCenter, whereas others must be built manually.
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Browse the [extensions directory][] and their individual READMEs for details.
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More information on the library and extension modules that are available from
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JCenter can be found on [Bintray][].
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[extensions directory]: https://github.com/google/ExoPlayer/tree/release-v2/extensions/
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[Bintray]: https://bintray.com/google/exoplayer
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#### 3. Turn on Java 8 support ####
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If not enabled already, you also need to turn on Java 8 support in all
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`build.gradle` files depending on ExoPlayer, by adding the following to the
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`android` section:
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```gradle
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compileOptions {
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targetCompatibility JavaVersion.VERSION_1_8
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}
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```
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### Locally ###
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Cloning the repository and depending on the modules locally is required when
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using some ExoPlayer extension modules. It's also a suitable approach if you
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want to make local changes to ExoPlayer, or if you want to use a development
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branch.
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First, clone the repository into a local directory and checkout the desired
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branch:
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```sh
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git clone https://github.com/google/ExoPlayer.git
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cd ExoPlayer
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git checkout release-v2
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```
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Next, add the following to your project's `settings.gradle` file, replacing
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`path/to/exoplayer` with the path to your local copy:
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```gradle
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gradle.ext.exoplayerRoot = 'path/to/exoplayer'
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gradle.ext.exoplayerModulePrefix = 'exoplayer-'
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apply from: new File(gradle.ext.exoplayerRoot, 'core_settings.gradle')
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```
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You should now see the ExoPlayer modules appear as part of your project. You can
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depend on them as you would on any other local module, for example:
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```gradle
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implementation project(':exoplayer-library-core')
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implementation project(':exoplayer-library-dash')
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implementation project(':exoplayer-library-ui')
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```
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## Developing ExoPlayer ##
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#### Project branches ####
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* Development work happens on the `dev-v2` branch. Pull requests should
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normally be made to this branch.
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* The `release-v2` branch holds the most recent release.
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#### Using Android Studio ####
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To develop ExoPlayer using Android Studio, simply open the ExoPlayer project in
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the root directory of the repository.
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