1 /*
2  * Copyright (C) 2015 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 package com.android.dialer.app.settings;
17 
18 import android.content.res.Configuration;
19 import android.os.Bundle;
20 import android.preference.PreferenceActivity;
21 import android.support.v7.app.AppCompatDelegate;
22 import android.support.v7.widget.Toolbar;
23 import android.view.MenuInflater;
24 import android.view.View;
25 import android.view.ViewGroup;
26 
27 /**
28  * A {@link android.preference.PreferenceActivity} which implements and proxies the necessary calls
29  * to be used with AppCompat.
30  */
31 public class AppCompatPreferenceActivity extends PreferenceActivity {
32 
33   private AppCompatDelegate delegate;
34 
35   private boolean isSafeToCommitTransactions;
36 
37   @Override
onCreate(Bundle savedInstanceState)38   protected void onCreate(Bundle savedInstanceState) {
39     getDelegate().installViewFactory();
40     getDelegate().onCreate(savedInstanceState);
41     super.onCreate(savedInstanceState);
42     isSafeToCommitTransactions = true;
43   }
44 
45   @Override
onPostCreate(Bundle savedInstanceState)46   protected void onPostCreate(Bundle savedInstanceState) {
47     super.onPostCreate(savedInstanceState);
48     getDelegate().onPostCreate(savedInstanceState);
49   }
50 
setSupportActionBar(Toolbar toolbar)51   public void setSupportActionBar(Toolbar toolbar) {
52     getDelegate().setSupportActionBar(toolbar);
53   }
54 
55   @Override
getMenuInflater()56   public MenuInflater getMenuInflater() {
57     return getDelegate().getMenuInflater();
58   }
59 
60   @Override
setContentView(int layoutResID)61   public void setContentView(int layoutResID) {
62     getDelegate().setContentView(layoutResID);
63   }
64 
65   @Override
setContentView(View view)66   public void setContentView(View view) {
67     getDelegate().setContentView(view);
68   }
69 
70   @Override
setContentView(View view, ViewGroup.LayoutParams params)71   public void setContentView(View view, ViewGroup.LayoutParams params) {
72     getDelegate().setContentView(view, params);
73   }
74 
75   @Override
addContentView(View view, ViewGroup.LayoutParams params)76   public void addContentView(View view, ViewGroup.LayoutParams params) {
77     getDelegate().addContentView(view, params);
78   }
79 
80   @Override
onPostResume()81   protected void onPostResume() {
82     super.onPostResume();
83     getDelegate().onPostResume();
84   }
85 
86   @Override
onTitleChanged(CharSequence title, int color)87   protected void onTitleChanged(CharSequence title, int color) {
88     super.onTitleChanged(title, color);
89     getDelegate().setTitle(title);
90   }
91 
92   @Override
onConfigurationChanged(Configuration newConfig)93   public void onConfigurationChanged(Configuration newConfig) {
94     super.onConfigurationChanged(newConfig);
95     getDelegate().onConfigurationChanged(newConfig);
96   }
97 
98   @Override
onStop()99   protected void onStop() {
100     super.onStop();
101     getDelegate().onStop();
102   }
103 
104   @Override
onDestroy()105   protected void onDestroy() {
106     super.onDestroy();
107     getDelegate().onDestroy();
108   }
109 
110   @Override
invalidateOptionsMenu()111   public void invalidateOptionsMenu() {
112     getDelegate().invalidateOptionsMenu();
113   }
114 
getDelegate()115   private AppCompatDelegate getDelegate() {
116     if (delegate == null) {
117       delegate = AppCompatDelegate.create(this, null);
118     }
119     return delegate;
120   }
121 
122   @Override
onStart()123   protected void onStart() {
124     super.onStart();
125     isSafeToCommitTransactions = true;
126   }
127 
128   @Override
onResume()129   protected void onResume() {
130     super.onResume();
131     isSafeToCommitTransactions = true;
132   }
133 
134   @Override
onSaveInstanceState(Bundle outState)135   protected void onSaveInstanceState(Bundle outState) {
136     super.onSaveInstanceState(outState);
137     isSafeToCommitTransactions = false;
138   }
139 
140   /**
141    * Returns true if it is safe to commit {@link FragmentTransaction}s at this time, based on
142    * whether {@link Activity#onSaveInstanceState} has been called or not.
143    *
144    * <p>Make sure that the current activity calls into {@link super.onSaveInstanceState(Bundle
145    * outState)} (if that method is overridden), so the flag is properly set.
146    */
isSafeToCommitTransactions()147   public boolean isSafeToCommitTransactions() {
148     return isSafeToCommitTransactions;
149   }
150 }
151