1 /*
2  * Copyright (C) 2010 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.apis.app;
18 
19 import com.example.android.apis.R;
20 
21 import android.app.Activity;
22 import android.os.Bundle;
23 import android.view.View;
24 import android.view.View.OnClickListener;
25 import android.widget.Button;
26 
27 public class ActivityRecreate extends Activity {
28     int mCurTheme;
29 
30     @Override
onCreate(Bundle savedInstanceState)31     protected void onCreate(Bundle savedInstanceState) {
32         super.onCreate(savedInstanceState);
33 
34         if (savedInstanceState != null) {
35             mCurTheme = savedInstanceState.getInt("theme");
36 
37             // Switch to a new theme different from last theme.
38             switch (mCurTheme) {
39                 case android.R.style.Theme_Holo_Light:
40                     mCurTheme = android.R.style.Theme_Holo_Dialog;
41                     break;
42                 case android.R.style.Theme_Holo_Dialog:
43                     mCurTheme = android.R.style.Theme_Holo;
44                     break;
45                 default:
46                     mCurTheme = android.R.style.Theme_Holo_Light;
47                     break;
48             }
49             setTheme(mCurTheme);
50         }
51 
52         setContentView(R.layout.activity_recreate);
53 
54         // Watch for button clicks.
55         Button button = (Button)findViewById(R.id.recreate);
56         button.setOnClickListener(mRecreateListener);
57     }
58 
59     @Override
onSaveInstanceState(Bundle savedInstanceState)60     protected void onSaveInstanceState(Bundle savedInstanceState) {
61         super.onSaveInstanceState(savedInstanceState);
62         savedInstanceState.putInt("theme", mCurTheme);
63     }
64 
65     private OnClickListener mRecreateListener = new OnClickListener() {
66         public void onClick(View v) {
67             recreate();
68         }
69     };
70 }
71