1 /*
2  * Copyright (C) 2017 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 
18 package android.fragment.cts;
19 
20 import android.os.Bundle;
21 
22 public class ReentrantFragment extends StrictFragment {
23     private static final String FROM_STATE = "fromState";
24     private static final String TO_STATE = "toState";
25     int mFromState = 0;
26     int mToState = 0;
27     boolean mIsRestored;
28 
create(int fromState, int toState)29     public static ReentrantFragment create(int fromState, int toState) {
30         ReentrantFragment fragment = new ReentrantFragment();
31         fragment.mFromState = fromState;
32         fragment.mToState = toState;
33         fragment.mIsRestored = false;
34         return fragment;
35     }
36 
37     @Override
onStateChanged(int fromState)38     public void onStateChanged(int fromState) {
39         super.onStateChanged(fromState);
40         // We execute the transaction when shutting down or after restoring
41         if (fromState == mFromState && mState == mToState
42                 && (mToState < mFromState || mIsRestored)) {
43             executeTransaction();
44         }
45     }
46 
executeTransaction()47     private void executeTransaction() {
48         getFragmentManager().beginTransaction()
49                 .add(new StrictFragment(), "should throw")
50                 .commitNow();
51     }
52 
53     @Override
onSaveInstanceState(Bundle outState)54     public void onSaveInstanceState(Bundle outState) {
55         super.onSaveInstanceState(outState);
56         outState.putInt(FROM_STATE, mFromState);
57         outState.putInt(TO_STATE, mToState);
58     }
59 
60     @Override
onCreate(Bundle savedInstanceState)61     public void onCreate(Bundle savedInstanceState) {
62         if (savedInstanceState != null) {
63             mFromState = savedInstanceState.getInt(FROM_STATE);
64             mToState = savedInstanceState.getInt(TO_STATE);
65             mIsRestored = true;
66         }
67         super.onCreate(savedInstanceState);
68     }
69 
70 }
71