1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.annotation; 18 19import static java.lang.annotation.ElementType.PARAMETER; 20import static java.lang.annotation.RetentionPolicy.SOURCE; 21 22import android.content.Context; 23import android.os.AsyncTask; 24 25import java.lang.annotation.Retention; 26import java.lang.annotation.Target; 27import java.util.concurrent.Executor; 28 29/** 30 * @paramDoc Callback and listener events are dispatched through this 31 * {@link Executor}, providing an easy way to control which thread is 32 * used. To dispatch events through the main thread of your 33 * application, you can use {@link Context#getMainExecutor()}. To 34 * dispatch events through a shared thread pool, you can use 35 * {@link AsyncTask#THREAD_POOL_EXECUTOR}. 36 * @hide 37 */ 38@Retention(SOURCE) 39@Target(PARAMETER) 40public @interface CallbackExecutor { 41} 42