UiThreadTest.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.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Classes and methods annotated with this annotation will be executed on the application's UI
* thread (or main thread).
*
* <p>This annotation will only take effect for {@link org.junit.Test}, {@link org.junit.Before} or
* {@link org.junit.After} methods.
*
* <p>Use {@link android.app.Instrumentation#runOnMainSync(Runnable)} if you need to switch in and
* out of the UI thread within your method.
*/
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface UiThreadTest {}