com/android/systemui/util/LifecycleFragment.java

/*
 * 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.Event.ON_CREATE;
import static androidx.lifecycle.Lifecycle.Event.ON_DESTROY;
import static androidx.lifecycle.Lifecycle.Event.ON_PAUSE;
import static androidx.lifecycle.Lifecycle.Event.ON_RESUME;
import static androidx.lifecycle.Lifecycle.Event.ON_START;
import static androidx.lifecycle.Lifecycle.Event.ON_STOP;

import android.annotation.CallSuper;
import android.app.Fragment;
import android.os.Bundle;

import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleOwner;
import androidx.lifecycle.LifecycleRegistry;

/**
 * Version of {@link #Fragment} that is a {@link LifecycleOwner}.
 */
public class LifecycleFragment extends Fragment implements LifecycleOwner {

    private final LifecycleRegistry mLifecycle = new LifecycleRegistry(this);

    public Lifecycle getLifecycle() {
        return mLifecycle;
    }

    @CallSuper
    @Override
    public void onCreate(Bundle savedInstanceState) {
        mLifecycle.handleLifecycleEvent(ON_CREATE);
        super.onCreate(savedInstanceState);
    }

    @CallSuper
    @Override
    public void onStart() {
        mLifecycle.handleLifecycleEvent(ON_START);
        super.onStart();
    }

    @CallSuper
    @Override
    public void onResume() {
        mLifecycle.handleLifecycleEvent(ON_RESUME);
        super.onResume();
    }

    @CallSuper
    @Override
    public void onPause() {
        mLifecycle.handleLifecycleEvent(ON_PAUSE);
        super.onPause();
    }

    @CallSuper
    @Override
    public void onStop() {
        mLifecycle.handleLifecycleEvent(ON_STOP);
        super.onStop();
    }

    @CallSuper
    @Override
    public void onDestroy() {
        mLifecycle.handleLifecycleEvent(ON_DESTROY);
        super.onDestroy();
    }

}