Adrian Roos | 65d60e2 | 2014-04-15 21:07:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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 | |
| 17 | package com.android.launcher3; |
| 18 | |
| 19 | import android.os.Handler; |
| 20 | import android.os.Looper; |
| 21 | |
| 22 | import java.util.List; |
| 23 | import java.util.concurrent.AbstractExecutorService; |
| 24 | import java.util.concurrent.TimeUnit; |
| 25 | |
| 26 | /** |
| 27 | * An executor service that executes its tasks on the main thread. |
| 28 | * |
| 29 | * Shutting down this executor is not supported. |
| 30 | */ |
| 31 | public class MainThreadExecutor extends AbstractExecutorService { |
| 32 | |
| 33 | private Handler mHandler = new Handler(Looper.getMainLooper()); |
| 34 | |
| 35 | @Override |
| 36 | public void execute(Runnable runnable) { |
| 37 | if (Looper.getMainLooper() == Looper.myLooper()) { |
| 38 | runnable.run(); |
| 39 | } else { |
| 40 | mHandler.post(runnable); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Not supported and throws an exception when used. |
| 46 | */ |
| 47 | @Override |
| 48 | @Deprecated |
| 49 | public void shutdown() { |
| 50 | throw new UnsupportedOperationException(); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Not supported and throws an exception when used. |
| 55 | */ |
| 56 | @Override |
| 57 | @Deprecated |
| 58 | public List<Runnable> shutdownNow() { |
| 59 | throw new UnsupportedOperationException(); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public boolean isShutdown() { |
| 64 | return false; |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public boolean isTerminated() { |
| 69 | return false; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Not supported and throws an exception when used. |
| 74 | */ |
| 75 | @Override |
| 76 | @Deprecated |
| 77 | public boolean awaitTermination(long l, TimeUnit timeUnit) throws InterruptedException { |
| 78 | throw new UnsupportedOperationException(); |
| 79 | } |
| 80 | } |