GoogleCardsActivity 效果很好

/*
* Copyright 2013 Niek Haarman
*
* 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.duguang.baseanimation.ui.listivew.listviews;

import java.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v4.util.LruCache;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.duguang.baseanimation.R;
import com.duguang.baseanimation.ui.base.BaseActivity;
import com.haarman.listviewanimations.ArrayAdapter;
import com.haarman.listviewanimations.itemmanipulation.OnDismissCallback;
import com.haarman.listviewanimations.itemmanipulation.SwipeDismissAdapter;
import com.haarman.listviewanimations.swinginadapters.prepared.SwingBottomInAnimationAdapter;

public class GoogleCardsActivity extends BaseActivity implements OnDismissCallback {

private GoogleCardsAdapter mGoogleCardsAdapter;

@Override
public void setView() {
setContentView(R.layout.activity_listviews_googlecards);

}

@Override
public void initView() {

ListView listView = (ListView) findViewById(R.id.activity_googlecards_listview);

mGoogleCardsAdapter = new GoogleCardsAdapter(this);
SwingBottomInAnimationAdapter swingBottomInAnimationAdapter
= new SwingBottomInAnimationAdapter(new SwipeDismissAdapter(mGoogleCardsAdapter, this));
swingBottomInAnimationAdapter.setAbsListView(listView);

listView.setAdapter(swingBottomInAnimationAdapter);

mGoogleCardsAdapter.addAll(getItems());

}

@Override
public void setListener() {
// TODO Auto-generated method stub

}

private ArrayList<Integer> getItems() {
ArrayList<Integer> items = new ArrayList<Integer>();
for (int i = 0; i < 100; i++) {
items.add(i);
}
return items;
}

@Override
public void onDismiss(AbsListView listView, int[] reverseSortedPositions) {
for (int position : reverseSortedPositions) {
mGoogleCardsAdapter.remove(position);
}
}

private static class GoogleCardsAdapter extends ArrayAdapter<Integer> {

private Context mContext;
private LruCache<Integer, Bitmap> mMemoryCache;

public GoogleCardsAdapter(Context context) {
mContext = context;

final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);

// Use 1/8th of the available memory for this memory cache.
final int cacheSize = maxMemory;
mMemoryCache = new LruCache<Integer, Bitmap>(cacheSize) {
@Override
protected int sizeOf(Integer key, Bitmap bitmap) {
// The cache size will be measured in kilobytes rather than
// number of items.
return bitmap.getRowBytes() * bitmap.getHeight() / 1024;
}
};
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
View view = convertView;
if (view == null) {
view = LayoutInflater.from(mContext).inflate(R.layout.activity_listviews_googlecards_card, parent, false);

viewHolder = new ViewHolder();
viewHolder.textView = (TextView) view.findViewById(R.id.activity_googlecards_card_textview);
view.setTag(viewHolder);

viewHolder.imageView = (ImageView) view.findViewById(R.id.activity_googlecards_card_imageview);
} else {
viewHolder = (ViewHolder) view.getTag();
}

viewHolder.textView.setText("This is card " + (getItem(position) + 1));
setImageView(viewHolder, position);

return view;
}

private void setImageView(ViewHolder viewHolder, int position) {
int imageResId;
switch (getItem(position) % 5) {
case 0:
imageResId = R.drawable.img_nature1;
break;
case 1:
imageResId = R.drawable.img_nature2;
break;
case 2:
imageResId = R.drawable.img_nature3;
break;
case 3:
imageResId = R.drawable.img_nature4;
break;
default:
imageResId = R.drawable.img_nature5;
}

Bitmap bitmap = getBitmapFromMemCache(imageResId);
if (bitmap == null) {
bitmap = BitmapFactory.decodeResource(mContext.getResources(), imageResId);
addBitmapToMemoryCache(imageResId, bitmap);
}
viewHolder.imageView.setImageBitmap(bitmap);
}

private void addBitmapToMemoryCache(int key, Bitmap bitmap) {
if (getBitmapFromMemCache(key) == null) {
mMemoryCache.put(key, bitmap);
}
}

private Bitmap getBitmapFromMemCache(int key) {
return mMemoryCache.get(key);
}

private static class ViewHolder {
TextView textView;
ImageView imageView;
}
}

}