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;      }   }}