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 package com.android.transitiontests;
17 
18 import android.app.Activity;
19 import android.os.Bundle;
20 import android.view.View;
21 import android.view.ViewGroup;
22 import android.transition.TransitionManager;
23 import android.widget.Button;
24 
25 public class FadingHierarchy extends Activity {
26 
27     ViewGroup mRemovingContainer, mContainer;
28     Button mRemovingButton;
29     boolean mVisible = true;
30     ViewGroup mInnerContainerParent;
31 
32     @Override
onCreate(Bundle savedInstanceState)33     public void onCreate(Bundle savedInstanceState) {
34         super.onCreate(savedInstanceState);
35         setContentView(R.layout.fading_hierarchy);
36 
37         mContainer = findViewById(R.id.container);
38         mRemovingContainer = findViewById(R.id.removingContainer);
39         mInnerContainerParent = (ViewGroup) mRemovingContainer.getParent();
40 
41         mRemovingButton = findViewById(R.id.removingButton);
42     }
43 
sendMessage(View view)44     public void sendMessage(View view) {
45         TransitionManager.beginDelayedTransition(mContainer, null);
46         if (mVisible) {
47             mInnerContainerParent.removeView(mRemovingContainer);
48         } else {
49             mInnerContainerParent.addView(mRemovingContainer);
50         }
51         mVisible = !mVisible;
52     }
53 }
54