| /* |
| * 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 com.android.systemui.utils.os; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A handler that allows control over when to dispatch messages and callbacks. |
| * |
| * WARNING: Because most Handler methods are final, the only thing this handler can intercept |
| * are sending messages and posting runnables, but *NOT* removing messages nor runnables. |
| * It also *CANNOT* intercept messages posted to the front of queue. |
| */ |
| public class FakeHandler extends Handler { |
| |
| private Mode mMode = Mode.IMMEDIATE; |
| private ArrayList<Message> mQueuedMessages = new ArrayList<>(); |
| |
| public FakeHandler(Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public boolean sendMessageAtTime(Message msg, long uptimeMillis) { |
| mQueuedMessages.add(msg); |
| if (mMode == Mode.IMMEDIATE) { |
| dispatchQueuedMessages(); |
| } |
| return true; |
| } |
| |
| public void setMode(Mode mode) { |
| mMode = mode; |
| } |
| |
| /** |
| * Dispatch any messages that have been queued on the calling thread. |
| */ |
| public void dispatchQueuedMessages() { |
| ArrayList<Message> messages = new ArrayList<>(mQueuedMessages); |
| mQueuedMessages.clear(); |
| for (Message msg : messages) { |
| dispatchMessage(msg); |
| } |
| } |
| |
| public enum Mode { |
| /** Messages are dispatched immediately on the calling thread. */ |
| IMMEDIATE, |
| /** Messages are queued until {@link #dispatchQueuedMessages()} is called. */ |
| QUEUEING, |
| } |
| } |