| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.bitmapsample; |
| |
| import android.app.Activity; |
| import android.content.res.Resources; |
| import android.graphics.Color; |
| import android.graphics.drawable.Drawable; |
| import android.os.Bundle; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.BaseAdapter; |
| import android.widget.ListView; |
| |
| import com.android.bitmap.BitmapCache; |
| import com.android.bitmap.DecodeAggregator; |
| import com.android.bitmap.UnrefedBitmapCache; |
| import com.android.bitmap.drawable.ExtendedBitmapDrawable; |
| import com.android.bitmap.drawable.ExtendedBitmapDrawable.ExtendedOptions; |
| |
| public class MainActivity extends Activity { |
| |
| private ListView mListView; |
| private final BitmapCache mCache = new UnrefedBitmapCache(TARGET_CACHE_SIZE_BYTES, 0, 0); |
| private final DecodeAggregator mDecodeAggregator = new DecodeAggregator(); |
| |
| private static Drawable PLACEHOLDER; |
| private static Drawable PROGRESS; |
| |
| private static final float NORMAL_PARALLAX_MULTIPLIER = 1.5f; |
| private static final int TARGET_CACHE_SIZE_BYTES = 5 * 1024 * 1024; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.activity_main); |
| |
| if (PLACEHOLDER == null) { |
| Resources res = getResources(); |
| PLACEHOLDER = res.getDrawable(R.drawable.ic_placeholder); |
| PROGRESS = res.getDrawable(R.drawable.progress); |
| } |
| |
| mListView = (ListView) findViewById(R.id.list); |
| mListView.setAdapter(new MyAdapter()); |
| } |
| |
| private class MyAdapter extends BaseAdapter { |
| |
| private final String[] mItems; |
| |
| private final String[] ITEMS = new String[]{ |
| "https://www.google.com/images/srpr/logo4w.png", |
| "http://www.google.com/logos/2012/celibidache12-hp.jpg", |
| "http://www.google.com/logos/2012/clara_schuman-2012-hp.jpg", |
| "http://www.google.com/logos/2011/royalwedding11-hp.png", |
| "http://www.google.com/logos/2012/vets_day-12-hp.jpg", |
| "http://www.google.com/logos/2011/firstmaninspace11-hp-js.jpg", |
| "http://www.google.com/logos/2011/nat-sov-and-childrens-turkey-hp.png", |
| "http://www.google.com/logos/2012/First_Day_Of_School_Isreal-2012-hp.jpg", |
| "http://www.google.com/logos/2012/celibidache12-hp.jpg", |
| "http://www.google.com/logos/2012/korea12-hp.png" |
| }; |
| |
| private static final int COPIES = 50; |
| |
| public MyAdapter() { |
| mItems = new String[ITEMS.length * COPIES]; |
| for (int i = 0; i < COPIES; i++) { |
| for (int j = 0; j < ITEMS.length; j++) { |
| mItems[i * ITEMS.length + j] = ITEMS[j]; |
| } |
| } |
| } |
| |
| @Override |
| public int getCount() { |
| return mItems.length; |
| } |
| |
| @Override |
| public Object getItem(int position) { |
| return mItems[position]; |
| } |
| |
| @Override |
| public long getItemId(int position) { |
| return position; |
| } |
| |
| @Override |
| public View getView(int position, View convertView, ViewGroup parent) { |
| BitmapView v; |
| if (convertView != null) { |
| v = (BitmapView) convertView; |
| } else { |
| v = new BitmapView(MainActivity.this); |
| ExtendedOptions opts = new ExtendedOptions( |
| ExtendedOptions.FEATURE_ORDERED_DISPLAY | ExtendedOptions.FEATURE_PARALLAX |
| | ExtendedOptions.FEATURE_STATE_CHANGES, PLACEHOLDER, PROGRESS); |
| opts.decodeAggregator = mDecodeAggregator; |
| opts.parallaxSpeedMultiplier = NORMAL_PARALLAX_MULTIPLIER; |
| opts.backgroundColor = Color.LTGRAY; |
| final ExtendedBitmapDrawable drawable = new ExtendedBitmapDrawable(getResources(), |
| mCache, true /* limit density */, opts); |
| |
| v.setTypedDrawable(drawable); |
| v.setListView(mListView); |
| } |
| v.getTypedDrawable().bind(new BitmapRequestKeyImpl(mItems[position])); |
| return v; |
| } |
| } |
| } |