1 /*
2  * Copyright (C) 2013 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.incallui;
18 
19 import android.os.Bundle;
20 
21 /**
22  * Base class for Presenters.
23  */
24 public abstract class Presenter<U extends Ui> {
25 
26     private U mUi;
27 
28     /**
29      * Called after the UI view has been created.  That is when fragment.onViewCreated() is called.
30      *
31      * @param ui The Ui implementation that is now ready to be used.
32      */
onUiReady(U ui)33     public void onUiReady(U ui) {
34         mUi = ui;
35     }
36 
37     /**
38      * Called when the UI view is destroyed in Fragment.onDestroyView().
39      */
onUiDestroy(U ui)40     public final void onUiDestroy(U ui) {
41         onUiUnready(ui);
42         mUi = null;
43     }
44 
45     /**
46      * To be overriden by Presenter implementations.  Called when the fragment is being
47      * destroyed but before ui is set to null.
48      */
onUiUnready(U ui)49     public void onUiUnready(U ui) {
50     }
51 
onSaveInstanceState(Bundle outState)52     public void onSaveInstanceState(Bundle outState) {}
53 
onRestoreInstanceState(Bundle savedInstanceState)54     public void onRestoreInstanceState(Bundle savedInstanceState) {}
55 
getUi()56     public U getUi() {
57         return mUi;
58     }
59 }
60