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      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
     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 }