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 
17 package android.transition;
18 
19 /**
20  * This adapter class provides empty implementations of the methods from {@link
21  * android.transition.Transition.TransitionListener}.
22  * Any custom listener that cares only about a subset of the methods of this listener can
23  * simply subclass this adapter class instead of implementing the interface directly.
24  */
25 public abstract class TransitionListenerAdapter implements Transition.TransitionListener {
26 
27     /**
28      * {@inheritDoc}
29      */
30     @Override
onTransitionStart(Transition transition)31     public void onTransitionStart(Transition transition) {
32     }
33 
34     /**
35      * {@inheritDoc}
36      */
37     @Override
onTransitionEnd(Transition transition)38     public void onTransitionEnd(Transition transition) {
39     }
40 
41     /**
42      * {@inheritDoc}
43      */
44     @Override
onTransitionCancel(Transition transition)45     public void onTransitionCancel(Transition transition) {
46     }
47 
48     /**
49      * {@inheritDoc}
50      */
51     @Override
onTransitionPause(Transition transition)52     public void onTransitionPause(Transition transition) {
53     }
54 
55     /**
56      * {@inheritDoc}
57      */
58     @Override
onTransitionResume(Transition transition)59     public void onTransitionResume(Transition transition) {
60     }
61 }
62