| /* |
| * Copyright (C) 2018 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.util; |
| |
| import static androidx.lifecycle.Lifecycle.State.DESTROYED; |
| import static androidx.lifecycle.Lifecycle.State.RESUMED; |
| |
| import android.view.View; |
| import android.view.View.OnAttachStateChangeListener; |
| |
| import androidx.annotation.NonNull; |
| import androidx.lifecycle.Lifecycle; |
| import androidx.lifecycle.LifecycleOwner; |
| import androidx.lifecycle.LifecycleRegistry; |
| |
| /** |
| * Tools for generating lifecycle from sysui objects. |
| */ |
| public class SysuiLifecycle { |
| |
| private SysuiLifecycle() { |
| } |
| |
| /** |
| * Get a lifecycle that will be put into the resumed state when the view is attached |
| * and goes to the destroyed state when the view is detached. |
| */ |
| public static LifecycleOwner viewAttachLifecycle(View v) { |
| return new ViewLifecycle(v); |
| } |
| |
| private static class ViewLifecycle implements LifecycleOwner, OnAttachStateChangeListener { |
| private final LifecycleRegistry mLifecycle = new LifecycleRegistry(this); |
| |
| ViewLifecycle(View v) { |
| v.addOnAttachStateChangeListener(this); |
| if (v.isAttachedToWindow()) { |
| mLifecycle.markState(RESUMED); |
| } |
| } |
| |
| @NonNull |
| @Override |
| public Lifecycle getLifecycle() { |
| return mLifecycle; |
| } |
| |
| @Override |
| public void onViewAttachedToWindow(View v) { |
| mLifecycle.markState(RESUMED); |
| } |
| |
| @Override |
| public void onViewDetachedFromWindow(View v) { |
| mLifecycle.markState(DESTROYED); |
| } |
| } |
| } |