ActivityEmbeddingController.kt
/*
* Copyright 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.window.embedding
import android.app.Activity
import android.content.Context
import java.util.concurrent.locks.ReentrantLock
import kotlin.concurrent.withLock
/** A singleton controller that allows checking the current [Activity] embedding status. */
class ActivityEmbeddingController private constructor(applicationContext: Context) {
private val embeddingBackend: EmbeddingBackend = ExtensionEmbeddingBackend
.getInstance(applicationContext)
/**
* Checks if the [activity] is embedded and its presentation may be customized by the host
* process of the task this [activity] is associated with.
*
* @param activity the [Activity] to check.
*/
// TODO(b/204399167) Migrate to a Flow
fun isActivityEmbedded(activity: Activity): Boolean =
embeddingBackend.isActivityEmbedded(activity)
companion object {
@Volatile
private var globalInstance: ActivityEmbeddingController? = null
private val globalLock = ReentrantLock()
/**
* Obtains the singleton instance of [ActivityEmbeddingController].
*
* @param context the [Context] to initialize the controller with
*/
@JvmStatic
fun getInstance(context: Context): ActivityEmbeddingController {
globalLock.withLock {
if (globalInstance == null) {
globalInstance = ActivityEmbeddingController(context.applicationContext)
}
return globalInstance!!
}
}
}
}