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/*
* Copyright (C) 2020 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 android.view;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Trace;
/**
* Thread to be used for inset animations to be running off the main thread.
* @hide
*/
public class InsetsAnimationThread extends HandlerThread {
private static InsetsAnimationThread sInstance;
private static Handler sHandler;
private InsetsAnimationThread() {
// TODO: Should this use higher priority?
super("InsetsAnimations");
}
private static void ensureThreadLocked() {
if (sInstance == null) {
sInstance = new InsetsAnimationThread();
sInstance.start();
sInstance.getLooper().setTraceTag(Trace.TRACE_TAG_VIEW);
sHandler = new Handler(sInstance.getLooper());
}
}
public static void release() {
synchronized (InsetsAnimationThread.class) {
if (sInstance == null) {
return;
}
sInstance.getLooper().quitSafely();
sInstance = null;
sHandler = null;
}
}
public static InsetsAnimationThread get() {
synchronized (InsetsAnimationThread.class) {
ensureThreadLocked();
return sInstance;
}
}
public static Handler getHandler() {
synchronized (InsetsAnimationThread.class) {
ensureThreadLocked();
return sHandler;
}
}
}
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