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
17package com.example.bitmapsample;
18
19import android.app.Activity;
20import android.content.res.Resources;
21import android.graphics.Color;
22import android.graphics.drawable.Drawable;
23import android.os.Bundle;
24import android.view.View;
25import android.view.ViewGroup;
26import android.widget.BaseAdapter;
27import android.widget.ListView;
28
29import com.android.bitmap.BitmapCache;
30import com.android.bitmap.DecodeAggregator;
31import com.android.bitmap.UnrefedBitmapCache;
32import com.android.bitmap.drawable.ExtendedBitmapDrawable;
33import com.android.bitmap.drawable.ExtendedBitmapDrawable.ExtendedOptions;
34
35public class MainActivity extends Activity {
36
37    private ListView mListView;
38    private final BitmapCache mCache = new UnrefedBitmapCache(TARGET_CACHE_SIZE_BYTES, 0, 0);
39    private final DecodeAggregator mDecodeAggregator = new DecodeAggregator();
40
41    private static Drawable PLACEHOLDER;
42    private static Drawable PROGRESS;
43
44    private static final float NORMAL_PARALLAX_MULTIPLIER = 1.5f;
45    private static final int TARGET_CACHE_SIZE_BYTES = 5 * 1024 * 1024;
46
47    @Override
48    protected void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50        setContentView(R.layout.activity_main);
51
52        if (PLACEHOLDER == null) {
53            Resources res = getResources();
54            PLACEHOLDER = res.getDrawable(R.drawable.ic_placeholder);
55            PROGRESS = res.getDrawable(R.drawable.progress);
56        }
57
58        mListView = (ListView) findViewById(R.id.list);
59        mListView.setAdapter(new MyAdapter());
60    }
61
62    private class MyAdapter extends BaseAdapter {
63
64        private final String[] mItems;
65
66        private final String[] ITEMS = new String[]{
67                "https://www.google.com/images/srpr/logo4w.png",
68                "http://www.google.com/logos/2012/celibidache12-hp.jpg",
69                "http://www.google.com/logos/2012/clara_schuman-2012-hp.jpg",
70                "http://www.google.com/logos/2011/royalwedding11-hp.png",
71                "http://www.google.com/logos/2012/vets_day-12-hp.jpg",
72                "http://www.google.com/logos/2011/firstmaninspace11-hp-js.jpg",
73                "http://www.google.com/logos/2011/nat-sov-and-childrens-turkey-hp.png",
74                "http://www.google.com/logos/2012/First_Day_Of_School_Isreal-2012-hp.jpg",
75                "http://www.google.com/logos/2012/celibidache12-hp.jpg",
76                "http://www.google.com/logos/2012/korea12-hp.png"
77        };
78
79        private static final int COPIES = 50;
80
81        public MyAdapter() {
82            mItems = new String[ITEMS.length * COPIES];
83            for (int i = 0; i < COPIES; i++) {
84                for (int j = 0; j < ITEMS.length; j++) {
85                    mItems[i * ITEMS.length + j] = ITEMS[j];
86                }
87            }
88        }
89
90        @Override
91        public int getCount() {
92            return mItems.length;
93        }
94
95        @Override
96        public Object getItem(int position) {
97            return mItems[position];
98        }
99
100        @Override
101        public long getItemId(int position) {
102            return position;
103        }
104
105        @Override
106        public View getView(int position, View convertView, ViewGroup parent) {
107            BitmapView v;
108            if (convertView != null) {
109                v = (BitmapView) convertView;
110            } else {
111                v = new BitmapView(MainActivity.this);
112                ExtendedOptions opts = new ExtendedOptions(
113                        ExtendedOptions.FEATURE_ORDERED_DISPLAY | ExtendedOptions.FEATURE_PARALLAX
114                                | ExtendedOptions.FEATURE_STATE_CHANGES, PLACEHOLDER, PROGRESS);
115                opts.decodeAggregator = mDecodeAggregator;
116                opts.parallaxSpeedMultiplier = NORMAL_PARALLAX_MULTIPLIER;
117                opts.backgroundColor = Color.LTGRAY;
118                final ExtendedBitmapDrawable drawable = new ExtendedBitmapDrawable(getResources(),
119                        mCache, true /* limit density */, opts);
120
121                v.setTypedDrawable(drawable);
122                v.setListView(mListView);
123            }
124            v.getTypedDrawable().bind(new BitmapRequestKeyImpl(mItems[position]));
125            return v;
126        }
127    }
128}
129