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.animation;
18 
19 // Need the following import to get access to the app resources, since this
20 // class is in a sub-package.
21 import com.example.android.apis.R;
22 
23 import android.view.View;
24 
25 import android.app.Activity;
26 import android.os.Bundle;
27 import android.widget.Button;
28 import android.widget.GridLayout;
29 
30 /**
31  * This application demonstrates how to use the animateLayoutChanges tag in XML to automate
32  * transition animations as items are removed from or added to a container.
33  */
34 public class LayoutAnimationsByDefault extends Activity {
35 
36     private int numButtons = 1;
37 
38     @Override
onCreate(Bundle savedInstanceState)39     public void onCreate(Bundle savedInstanceState) {
40 
41         super.onCreate(savedInstanceState);
42         setContentView(R.layout.layout_animations_by_default);
43 
44         final GridLayout gridContainer = (GridLayout) findViewById(R.id.gridContainer);
45 
46         Button addButton = (Button) findViewById(R.id.addNewButton);
47         addButton.setOnClickListener(new View.OnClickListener() {
48             public void onClick(View v) {
49                 Button newButton = new Button(LayoutAnimationsByDefault.this);
50                 newButton.setText(String.valueOf(numButtons++));
51                 newButton.setOnClickListener(new View.OnClickListener() {
52                     public void onClick(View v) {
53                         gridContainer.removeView(v);
54                     }
55                 });
56                 gridContainer.addView(newButton, Math.min(1, gridContainer.getChildCount()));
57             }
58         });
59     }
60 
61 }