IdleNotifier.java
/*
* Copyright (C) 2017 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.test.espresso.base;
/**
* An internal interface UiControllerImpl uses to communicate with sources of idleness.
*
* @param <CB> the callback type which receives notification of idleness.
*/
interface IdleNotifier<CB> {
/** Indicates the resources backed by this notifier are idle now. */
boolean isIdleNow();
/** De-registers any currently registered callback. */
void cancelCallback();
/**
* Registers a callback to be invoked when the resources backed by the notifier go idle.
*
* @param callback an object that the notifier will use to inform us about the idle state of the
* resources.
*/
void registerNotificationCallback(CB callback);
}