1 /*
2  * Copyright 2012 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.animationsdemo;
18 
19 import android.app.Activity;
20 import android.app.ListActivity;
21 import android.content.Intent;
22 import android.os.Bundle;
23 import android.view.View;
24 import android.widget.ArrayAdapter;
25 import android.widget.ListView;
26 
27 /**
28  * The launchpad activity for this sample project. This activity launches other activities that
29  * demonstrate implementations of common animations.
30  */
31 public class MainActivity extends ListActivity {
32     /**
33      * This class describes an individual sample (the sample title, and the activity class that
34      * demonstrates this sample).
35      */
36     private class Sample {
37         private CharSequence title;
38         private Class<? extends Activity> activityClass;
39 
Sample(int titleResId, Class<? extends Activity> activityClass)40         public Sample(int titleResId, Class<? extends Activity> activityClass) {
41             this.activityClass = activityClass;
42             this.title = getResources().getString(titleResId);
43         }
44 
45         @Override
toString()46         public String toString() {
47             return title.toString();
48         }
49     }
50 
51     /**
52      * The collection of all samples in the app. This gets instantiated in {@link
53      * #onCreate(android.os.Bundle)} because the {@link Sample} constructor needs access to {@link
54      * android.content.res.Resources}.
55      */
56     private static Sample[] mSamples;
57 
onCreate(Bundle savedInstanceState)58     public void onCreate(Bundle savedInstanceState) {
59         super.onCreate(savedInstanceState);
60         setContentView(R.layout.activity_main);
61 
62         // Instantiate the list of samples.
63         mSamples = new Sample[]{
64                 new Sample(R.string.title_crossfade, CrossfadeActivity.class),
65                 new Sample(R.string.title_card_flip, CardFlipActivity.class),
66                 new Sample(R.string.title_screen_slide, ScreenSlideActivity.class),
67                 new Sample(R.string.title_zoom, ZoomActivity.class),
68                 new Sample(R.string.title_layout_changes, LayoutChangesActivity.class),
69         };
70 
71         setListAdapter(new ArrayAdapter<Sample>(this,
72                 android.R.layout.simple_list_item_1,
73                 android.R.id.text1,
74                 mSamples));
75     }
76 
77     @Override
onListItemClick(ListView listView, View view, int position, long id)78     protected void onListItemClick(ListView listView, View view, int position, long id) {
79         // Launch the sample associated with this list position.
80         startActivity(new Intent(MainActivity.this, mSamples[position].activityClass));
81     }
82 }
83