# Migrating to THEOplayer Android SDK 11.x

This article will guide you through updating to THEOplayer Android SDK version 11 (from version 10), and the changes needed in your code.

## Update THEOplayer

Update THEOplayer Android SDK to version 11 in your **module-level** `build.gradle` file:

```groovy
dependencies {
    implementation 'com.theoplayer.theoplayer-sdk-android:core:11.+'
}
```

If you're using the [Open Video UI for Android](https://optiview.dolby.com/docs/open-video-ui/android.md) or one of [our connectors](https://optiview.dolby.com/docs/theoplayer/connectors/android.md), make sure to update them to the latest version too to ensure proper support for THEOplayer version 11.

## Player methods must be called from the main thread

All methods on `Player` and `THEOplayerView` must only be called from the main thread. Calling these methods from a different thread will now throw an `IllegalStateException`.

These methods are now annotated with [`@MainThread`](https://developer.android.com/reference/androidx/annotation/MainThread), which should help the Android build tools to catch potential threading issues at compile time.

## Google IMA SDK integration requires core library desugaring

The Google IMA SDK integration now requires [core library desugaring](https://developer.android.com/studio/write/java8-support#library-desugaring) to be enabled.

```groovy
android {
    compileOptions {
        coreLibraryDesugaringEnabled = true
    }
}

dependencies {
    implementation 'com.theoplayer.theoplayer-sdk-android:core:+'
    implementation 'com.theoplayer.theoplayer-sdk-android:integration-ads-ima:+'

    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.5'
}
```

See [our updated guide for Google IMA](https://optiview.dolby.com/docs/theoplayer/how-to-guides/android/ads/google-ima.md) for more information.

## Replace or remove usages of deprecated APIs

Some properties and methods that were previously deprecated have been removed from the API. Update your code to use the new APIs instead.

* Removed `preloadChannels` in THEOlive API.
* Changed `MediaTailorAdAvail.id` to return a `String` instead of an `Int`, to align with `AdBreak.id`. If you need the original `Int` value, use `AdBreak.id.toInt()` instead.
* Removed `TheoAdsErrorEvent`, use `AdErrorEvent` instead.
* Removed `TheoAdsEventTypes.THEOADS_ERROR`, use `AdsEventTypes.AD_ERROR` instead.