| /* |
| * Copyright (C) 2015 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; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.StrictMode; |
| import android.view.Choreographer; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Utility class for methods used to dejank the UI. |
| */ |
| public class DejankUtils { |
| |
| private static final Choreographer sChoreographer = Choreographer.getInstance(); |
| private static final Handler sHandler = new Handler(); |
| |
| private static final ArrayList<Runnable> sPendingRunnables = new ArrayList<>(); |
| |
| private static final Runnable sAnimationCallbackRunnable = new Runnable() { |
| @Override |
| public void run() { |
| for (int i = 0; i < sPendingRunnables.size(); i++) { |
| sHandler.post(sPendingRunnables.get(i)); |
| } |
| sPendingRunnables.clear(); |
| } |
| }; |
| |
| /** |
| * Executes {@code r} after performTraversals. Use this do to CPU heavy work for which the |
| * timing is not critical for animation. The work is then scheduled at the same time |
| * RenderThread is doing its thing, leading to better parallelization. |
| * |
| * <p>Needs to be called from the main thread. |
| */ |
| public static void postAfterTraversal(Runnable r) { |
| throwIfNotCalledOnMainThread(); |
| sPendingRunnables.add(r); |
| postAnimationCallback(); |
| } |
| |
| /** |
| * Removes a previously scheduled runnable. |
| * |
| * <p>Needs to be called from the main thread. |
| */ |
| public static void removeCallbacks(Runnable r) { |
| throwIfNotCalledOnMainThread(); |
| sPendingRunnables.remove(r); |
| sHandler.removeCallbacks(r); |
| } |
| |
| private static void postAnimationCallback() { |
| sChoreographer.postCallback(Choreographer.CALLBACK_ANIMATION, sAnimationCallbackRunnable, |
| null); |
| } |
| |
| private static void throwIfNotCalledOnMainThread() { |
| if (!Looper.getMainLooper().isCurrentThread()) { |
| throw new IllegalStateException("should be called from the main thread."); |
| } |
| } |
| } |