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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.systemui.util;
     18 
     19 import static androidx.lifecycle.Lifecycle.Event.ON_CREATE;
     20 import static androidx.lifecycle.Lifecycle.Event.ON_DESTROY;
     21 import static androidx.lifecycle.Lifecycle.Event.ON_PAUSE;
     22 import static androidx.lifecycle.Lifecycle.Event.ON_RESUME;
     23 import static androidx.lifecycle.Lifecycle.Event.ON_START;
     24 import static androidx.lifecycle.Lifecycle.Event.ON_STOP;
     25 
     26 import android.annotation.CallSuper;
     27 import android.app.Fragment;
     28 import android.os.Bundle;
     29 
     30 import androidx.lifecycle.Lifecycle;
     31 import androidx.lifecycle.LifecycleOwner;
     32 import androidx.lifecycle.LifecycleRegistry;
     33 
     34 /**
     35  * Version of {@link #Fragment} that is a {@link LifecycleOwner}.
     36  */
     37 public class LifecycleFragment extends Fragment implements LifecycleOwner {
     38 
     39     private final LifecycleRegistry mLifecycle = new LifecycleRegistry(this);
     40 
     41     public Lifecycle getLifecycle() {
     42         return mLifecycle;
     43     }
     44 
     45     @CallSuper
     46     @Override
     47     public void onCreate(Bundle savedInstanceState) {
     48         mLifecycle.handleLifecycleEvent(ON_CREATE);
     49         super.onCreate(savedInstanceState);
     50     }
     51 
     52     @CallSuper
     53     @Override
     54     public void onStart() {
     55         mLifecycle.handleLifecycleEvent(ON_START);
     56         super.onStart();
     57     }
     58 
     59     @CallSuper
     60     @Override
     61     public void onResume() {
     62         mLifecycle.handleLifecycleEvent(ON_RESUME);
     63         super.onResume();
     64     }
     65 
     66     @CallSuper
     67     @Override
     68     public void onPause() {
     69         mLifecycle.handleLifecycleEvent(ON_PAUSE);
     70         super.onPause();
     71     }
     72 
     73     @CallSuper
     74     @Override
     75     public void onStop() {
     76         mLifecycle.handleLifecycleEvent(ON_STOP);
     77         super.onStop();
     78     }
     79 
     80     @CallSuper
     81     @Override
     82     public void onDestroy() {
     83         mLifecycle.handleLifecycleEvent(ON_DESTROY);
     84         super.onDestroy();
     85     }
     86 
     87 }
     88