FragmentViewLifecycleOwner.java
/*
* Copyright 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 androidx.fragment.app;
import androidx.annotation.NonNull;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleOwner;
import androidx.lifecycle.LifecycleRegistry;
class FragmentViewLifecycleOwner implements LifecycleOwner {
private LifecycleRegistry mLifecycleRegistry = null;
/**
* Initializes the underlying Lifecycle if it hasn't already been created.
*/
void initialize() {
if (mLifecycleRegistry == null) {
mLifecycleRegistry = new LifecycleRegistry(this);
}
}
/**
* @return True if the Lifecycle has been initialized.
*/
boolean isInitialized() {
return mLifecycleRegistry != null;
}
@NonNull
@Override
public Lifecycle getLifecycle() {
initialize();
return mLifecycleRegistry;
}
void handleLifecycleEvent(@NonNull Lifecycle.Event event) {
mLifecycleRegistry.handleLifecycleEvent(event);
}
}