1/*
2 * Copyright (C) 2016 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
17package com.android.settingslib.core.lifecycle;
18
19import static android.arch.lifecycle.Lifecycle.Event.ON_CREATE;
20import static android.arch.lifecycle.Lifecycle.Event.ON_DESTROY;
21import static android.arch.lifecycle.Lifecycle.Event.ON_PAUSE;
22import static android.arch.lifecycle.Lifecycle.Event.ON_RESUME;
23import static android.arch.lifecycle.Lifecycle.Event.ON_START;
24import static android.arch.lifecycle.Lifecycle.Event.ON_STOP;
25
26import android.annotation.CallSuper;
27import android.app.Fragment;
28import android.arch.lifecycle.LifecycleOwner;
29import android.content.Context;
30import android.os.Bundle;
31import android.view.Menu;
32import android.view.MenuInflater;
33import android.view.MenuItem;
34
35public class ObservableFragment extends Fragment implements LifecycleOwner {
36
37    private final Lifecycle mLifecycle = new Lifecycle(this);
38
39    public Lifecycle getLifecycle() {
40        return mLifecycle;
41    }
42
43    @CallSuper
44    @Override
45    public void onAttach(Context context) {
46        super.onAttach(context);
47        mLifecycle.onAttach(context);
48    }
49
50    @CallSuper
51    @Override
52    public void onCreate(Bundle savedInstanceState) {
53        mLifecycle.onCreate(savedInstanceState);
54        mLifecycle.handleLifecycleEvent(ON_CREATE);
55        super.onCreate(savedInstanceState);
56    }
57
58    @CallSuper
59    @Override
60    public void onSaveInstanceState(Bundle outState) {
61        super.onSaveInstanceState(outState);
62        mLifecycle.onSaveInstanceState(outState);
63    }
64
65    @CallSuper
66    @Override
67    public void onStart() {
68        mLifecycle.handleLifecycleEvent(ON_START);
69        super.onStart();
70    }
71
72    @CallSuper
73    @Override
74    public void onResume() {
75        mLifecycle.handleLifecycleEvent(ON_RESUME);
76        super.onResume();
77    }
78
79    @CallSuper
80    @Override
81    public void onPause() {
82        mLifecycle.handleLifecycleEvent(ON_PAUSE);
83        super.onPause();
84    }
85
86    @CallSuper
87    @Override
88    public void onStop() {
89        mLifecycle.handleLifecycleEvent(ON_STOP);
90        super.onStop();
91    }
92
93    @CallSuper
94    @Override
95    public void onDestroy() {
96        mLifecycle.handleLifecycleEvent(ON_DESTROY);
97        super.onDestroy();
98    }
99
100    @CallSuper
101    @Override
102    public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
103        mLifecycle.onCreateOptionsMenu(menu, inflater);
104        super.onCreateOptionsMenu(menu, inflater);
105    }
106
107    @CallSuper
108    @Override
109    public void onPrepareOptionsMenu(final Menu menu) {
110        mLifecycle.onPrepareOptionsMenu(menu);
111        super.onPrepareOptionsMenu(menu);
112    }
113
114    @CallSuper
115    @Override
116    public boolean onOptionsItemSelected(final MenuItem menuItem) {
117        boolean lifecycleHandled = mLifecycle.onOptionsItemSelected(menuItem);
118        if (!lifecycleHandled) {
119            return super.onOptionsItemSelected(menuItem);
120        }
121        return lifecycleHandled;
122    }
123}
124