ActiveRootLister.java
/*
* Copyright (C) 2014 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;
import androidx.test.espresso.Root;
import java.util.List;
/** Provides access to all root views in an application. */
public interface ActiveRootLister {
/**
* Lists the active roots in an application at this moment.
*
* @return a list of all the active roots in the application.
* @throws IllegalStateException if invoked from a thread besides the main thread.
*/
public List<Root> listActiveRoots();
}