android/arch/lifecycle/LifecycleService.java

/*
 * Copyright (C) 2017 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.arch.lifecycle;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.CallSuper;
import android.support.annotation.Nullable;

/**
 * A Service that is also a {@link LifecycleOwner}.
 */
public class LifecycleService extends Service implements LifecycleOwner {

    private final ServiceLifecycleDispatcher mDispatcher = new ServiceLifecycleDispatcher(this);

    @CallSuper
    @Override
    public void onCreate() {
        mDispatcher.onServicePreSuperOnCreate();
        super.onCreate();
    }

    @CallSuper
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        mDispatcher.onServicePreSuperOnBind();
        return null;
    }

    @SuppressWarnings("deprecation")
    @CallSuper
    @Override
    public void onStart(Intent intent, int startId) {
        mDispatcher.onServicePreSuperOnStart();
        super.onStart(intent, startId);
    }

    // this method is added only to annotate it with @CallSuper.
    // In usual service super.onStartCommand is no-op, but in LifecycleService
    // it results in mDispatcher.onServicePreSuperOnStart() call, because
    // super.onStartCommand calls onStart().
    @CallSuper
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return super.onStartCommand(intent, flags, startId);
    }

    @CallSuper
    @Override
    public void onDestroy() {
        mDispatcher.onServicePreSuperOnDestroy();
        super.onDestroy();
    }

    @Override
    public Lifecycle getLifecycle() {
        return mDispatcher.getLifecycle();
    }
}