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1 | /* |
2 | * Copyright (C) 2011 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 android.support.v2.app; |
18 | |
19 | import android.content.Context; |
20 | import android.os.Parcelable; |
21 | import android.util.SparseArray; |
22 | import android.view.View; |
23 | import android.view.ViewGroup; |
24 | import android.widget.FrameLayout; |
25 | |
26 | /** |
27 | * Pre-Honeycomb versions of the platform don't have View.setSaveFromParentEnabled(), |
28 | * so instead we insert this between the view and its parent. |
29 | */ |
30 | public class NoSaveStateFrameLayout extends FrameLayout { |
31 | static ViewGroup wrap(View child) { |
32 | NoSaveStateFrameLayout wrapper = new NoSaveStateFrameLayout(child.getContext()); |
33 | ViewGroup.LayoutParams childParams = child.getLayoutParams(); |
34 | if (childParams != null) { |
35 | wrapper.setLayoutParams(childParams); |
36 | } |
37 | NoSaveStateFrameLayout.LayoutParams lp = new NoSaveStateFrameLayout.LayoutParams( |
38 | ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT); |
39 | child.setLayoutParams(lp); |
40 | wrapper.addView(child); |
41 | return wrapper; |
42 | } |
43 | |
44 | public NoSaveStateFrameLayout(Context context) { |
45 | super(context); |
46 | } |
47 | |
48 | /** |
49 | * Override to prevent freezing of any child views. |
50 | */ |
51 | @Override |
52 | protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { |
53 | dispatchFreezeSelfOnly(container); |
54 | } |
55 | |
56 | /** |
57 | * Override to prevent thawing of any child views. |
58 | */ |
59 | @Override |
60 | protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { |
61 | dispatchThawSelfOnly(container); |
62 | } |
63 | } |