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.app.Activity;
20 import android.app.Fragment;
21 import android.os.Bundle;
22 
23 /**
24  * Parent for all fragments that use Presenters and Ui design.
25  */
26 public abstract class BaseFragment<T extends Presenter<U>, U extends Ui> extends Fragment {
27 
28     private static final String KEY_FRAGMENT_HIDDEN = "key_fragment_hidden";
29 
30     private T mPresenter;
31 
createPresenter()32     public abstract T createPresenter();
33 
getUi()34     public abstract U getUi();
35 
BaseFragment()36     protected BaseFragment() {
37         mPresenter = createPresenter();
38     }
39 
40     /**
41      * Presenter will be available after onActivityCreated().
42      *
43      * @return The presenter associated with this fragment.
44      */
getPresenter()45     public T getPresenter() {
46         return mPresenter;
47     }
48 
49     @Override
onActivityCreated(Bundle savedInstanceState)50     public void onActivityCreated(Bundle savedInstanceState) {
51         super.onActivityCreated(savedInstanceState);
52         mPresenter.onUiReady(getUi());
53     }
54 
55     @Override
onCreate(Bundle savedInstanceState)56     public void onCreate(Bundle savedInstanceState) {
57         super.onCreate(savedInstanceState);
58         if (savedInstanceState != null) {
59             mPresenter.onRestoreInstanceState(savedInstanceState);
60             if (savedInstanceState.getBoolean(KEY_FRAGMENT_HIDDEN)) {
61                 getFragmentManager().beginTransaction().hide(this).commit();
62             }
63         }
64     }
65 
66     @Override
onDestroyView()67     public void onDestroyView() {
68         super.onDestroyView();
69         mPresenter.onUiDestroy(getUi());
70     }
71 
72     @Override
onSaveInstanceState(Bundle outState)73     public void onSaveInstanceState(Bundle outState) {
74         super.onSaveInstanceState(outState);
75         mPresenter.onSaveInstanceState(outState);
76         outState.putBoolean(KEY_FRAGMENT_HIDDEN, isHidden());
77     }
78 
79     @Override
onAttach(Activity activity)80     public void onAttach(Activity activity) {
81         super.onAttach(activity);
82         ((FragmentDisplayManager) activity).onFragmentAttached(this);
83     }
84 }
85