1 /*
2  * Copyright 2012 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.example.android.tabcompat.lib;
18 
19 import com.example.android.tabcompat.lib.TabHelper;
20 
21 import android.os.Bundle;
22 import android.support.v4.app.FragmentActivity;
23 
24 /**
25  * A base activity that defers tab functionality to a {@link TabHelper}.
26  *
27  * When building an activity with tabs, extend this class in order to provide compatibility with API
28  * level 5 and above. Using this class along with the {@link TabHelper} and {@link com.example.android.tabcompat.lib.CompatTab}
29  * classes, you can build a tab UI that's built using the {@link android.app.ActionBar} on
30  * Honeycomb+ and the {@link android.widget.TabWidget} on all older versions.
31  *
32  * The {@link TabHelper} APIs obfuscate all the compatibility work for you.
33  */
34 public abstract class TabCompatActivity extends FragmentActivity {
35 
36     TabHelper mTabHelper;
37 
38     @Override
onCreate(Bundle savedInstanceState)39     protected void onCreate(Bundle savedInstanceState) {
40         super.onCreate(savedInstanceState);
41         mTabHelper = TabHelper.createInstance(this);
42     }
43 
44     @Override
onSaveInstanceState(Bundle outState)45     protected void onSaveInstanceState(Bundle outState) {
46         super.onSaveInstanceState(outState);
47         mTabHelper.onSaveInstanceState(outState);
48     }
49 
50     @Override
onRestoreInstanceState(Bundle savedInstanceState)51     protected void onRestoreInstanceState(Bundle savedInstanceState) {
52         super.onRestoreInstanceState(savedInstanceState);
53         mTabHelper.onRestoreInstanceState(savedInstanceState);
54     }
55 
56     /**
57      * Returns the {@link TabHelper} for this activity.
58      */
getTabHelper()59     protected TabHelper getTabHelper() {
60         mTabHelper.setUp();
61         return mTabHelper;
62     }
63 }
64