android运用Bitmap时OOM的解决方法之一软应用（SoftReference）

最新推荐文章于 2019-07-14 17:28:25 发布

gutaocslg

最新推荐文章于 2019-07-14 17:28:25 发布

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分类专栏： android 文章标签： Android 内存泄漏 asynctask SoftReference android缓存

本文链接：https://blog.youkuaiyun.com/gutaocslg/article/details/21013035

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转载请注明出处：http://blog.youkuaiyun.com/gutaocslg/article/details/21013035

在app应用的开发过程中，由于硬件的限制，会导致我们开发的应用在手机或者平板上运用是会出现OOM导致程序强制停止。导致这个原因有很多，比如运用Handler导致的内存泄漏等。其中最常见的现象是程序加载图片，特别是在GridView或者ListView加载大量图片时。其中解决这个问题的方法有很多：比如说运用Lrucache、软引用。接下来我会运用软引用结合实例来给大家讲解一下。

首先创建一个过程SoftReferenceDemo。其中有一个MainActivity：

public class MainActivity extends Activity {

	private GridView gridView;
	GridViewAdapter adapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		gridView = (GridView) findViewById(R.id.photoWall);
		adapter = new GridViewAdapter(this,gridView);
		adapter.setImageLists(Images.imageUrls);
		gridView.setAdapter(adapter);
	}


	@Override
	protected void onDestroy() {
		super.onDestroy();
		adapter.cancleTasks();
	}
}

activity_main.xml很简单就一个GridView：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <GridView 
        android:id="@+id/photoWall"
        android:columnWidth="90dip"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:stretchMode="columnWidth"
        android:numColumns="auto_fit"
        android:gravity="center"
        android:verticalSpacing="10dip"
        />

</RelativeLayout>

下面就来看一下主要的Adapater，我在这里处理了图片的引用来解决OOM，当然在这里，完全可以将下载的图片写到SD卡里面，我这里就直接运用内存来缓存，体现软引用的方法。当内存不够时，会释放软引用的对象，当内存足够时，图片将会缓存在内存中下面我们来看一下这个类：

package com.gutao.activity;

import java.io.IOException;
import java.lang.ref.SoftReference;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class GridViewAdapter extends BaseAdapter implements OnScrollListener{

	
	private LayoutInflater inflater;
	private String[] list;
	/*
	 * 运用软应用
	 */
	private HashMap<String, SoftReference<Bitmap>> softCache = new HashMap<String, SoftReference<Bitmap>>();
	
	private HashMap<String, Bitmap> soft = new HashMap<String, Bitmap>();
	/*
	 * 下载线程
	 */
	private Set<WorkingTask> taskCollections = new HashSet<GridViewAdapter.WorkingTask>();
	
	/*
	 * 可见的第一个位置
	 */
	private int firstVisiableItemIndex;
	/*
	 * 可以看到的总数
	 */
	private int visiableItemsCount;
	/*
	 * 第一次加载
	 */
	private boolean isFirst = true;
	/*
	 * 用于绑定mainLayout中的grid
	 */
	private GridView grid;
	
	
	public GridViewAdapter(Context context,GridView grid) {
		inflater = LayoutInflater.from(context);
		this.grid = grid;
		grid.setOnScrollListener(this);
	}
	
	@Override
	public int getCount() {
		return list.length;
	}

	@Override
	public Object getItem(int position) {
		return list[position];
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		String url = (String) getItem(position);
		Holder holder = null;
		if(convertView == null) {
			holder = new Holder();
			convertView = inflater.inflate(R.layout.photo, null);
			holder.image = (ImageView)convertView.findViewById(R.id.photo);
			convertView.setTag(holder);
		} else {
			holder = (Holder) convertView.getTag();
		}
		holder.image.setTag(url);
		setImageUrl(url,holder.image);
		return convertView;
	}

	
	/**
	 * @param url
	 * @param photo
	 * 设置图片
	 */
	private void setImageUrl(String url, ImageView photo) {
		Bitmap bitmap = getBitmapFromMemorySoftCache(url);
		if(bitmap != null) {
			photo.setImageBitmap(bitmap);
		} else {
			photo.setImageResource(R.drawable.empty_photo);
		}
	}
	
	
	/**
	 * 获取缓存里面的图片
	 * @param url
	 * @return
	 */
	private Bitmap getBitmapFromMemorySoftCache(String url) {
		if(softCache.containsKey(url)) {
			SoftReference<Bitmap> softBitmap = softCache.get(url);
			if(softBitmap != null) {
				Bitmap bitmap = softBitmap.get();
				if(bitmap != null) {
					return bitmap;
				}
			}
		}

		return null;
	}
	
	/**
	 * 添加数据到缓存里面及软应用方法
	 * @param url
	 * @param softBitmap
	 */
	private void addBitmapToMemorySoftCache(String url,SoftReference<Bitmap> softBitmap) {
		softCache.put(url, softBitmap);
	}
	
	/*
	private Bitmap getBitmap(String url) {
		if(soft.containsKey(url)) {
			return soft.get(url);
		}
		return null;
	}
	
	private void addBitmap(String url, Bitmap bitmap) {
		soft.put(url, bitmap);
	}*/
	/**
	 * 下载线程
	*/
	class WorkingTask extends AsyncTask<String, Void, SoftReference<Bitmap>> {

		String url = "";
		@Override
		protected SoftReference<Bitmap> doInBackground(String... params) {
			url = params[0];
			//在后台开始下载图片
			return downloadBitmap(params[0]);
		}

		private SoftReference<Bitmap> downloadBitmap(String imageUrl) {
			HttpURLConnection con = null;
			SoftReference<Bitmap> bitmap = null;
			try {
				URL url = new URL(imageUrl);
				con = (HttpURLConnection) url.openConnection();
				con.setConnectTimeout(30 * 1000);
				con.setReadTimeout(30 * 1000);
				con.setDoInput(true);
				con.setDoOutput(true);
				con.connect();
				
				if(con.getResponseCode() == 200){
					bitmap = new SoftReference<Bitmap>(BitmapFactory.decodeStream(con.getInputStream()));
					addBitmapToMemorySoftCache(imageUrl, bitmap);
				}
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				System.out.println(imageUrl);
				e.printStackTrace();
			} finally {
				if(con != null) {
					con.disconnect();
					con = null;
				}
			}
			return bitmap;
		}


		@Override
		protected void onPostExecute(SoftReference<Bitmap> result) {
			super.onPostExecute(result);
			ImageView image = (ImageView) grid.findViewWithTag(url);
			if(result != null) {
				if(result.get() != null) {
					try{
						image.setImageBitmap(result.get());
					} catch (Exception e) {
						System.out.println(url);
					}
					
				}
			}
			taskCollections.remove(this);
		}
		
	} 

	/**
	 * 下载线程
	 
	class WorkingTask extends AsyncTask<String, Void, Bitmap> {

		String url = "";
		@Override
		protected Bitmap doInBackground(String... params) {
			url = params[0];
			//在后台开始下载图片
			return downloadBitmap(params[0]);
		}

		private Bitmap downloadBitmap(String imageUrl) {
			HttpURLConnection con = null;
			Bitmap bitmap = null;
			try {
				URL url = new URL(imageUrl);
				con = (HttpURLConnection) url.openConnection();
				con.setConnectTimeout(10 * 1000);
				con.setReadTimeout(10 * 1000);
				con.setDoInput(true);
				con.setDoOutput(true);
				con.connect();
				System.out.println(con.getResponseCode()+"===============");
				bitmap = BitmapFactory.decodeStream(con.getInputStream());
				addBitmap(imageUrl, bitmap);
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				if(con != null) {
					con.disconnect();
					con = null;
				}
			}
			return bitmap;
		}


		@Override
		protected void onPostExecute(Bitmap result) {
			super.onPostExecute(result);
			ImageView image = (ImageView) grid.findViewWithTag(url);
			if(result != null) {
				try{
					image.setImageBitmap(result);
				} catch (Exception e) {
					System.out.println(url);
				}
				
			}
			taskCollections.remove(this);
		}
		
	} 
	*/
	@Override
	public void onScrollStateChanged(AbsListView view, int scrollState) {
		if(scrollState == SCROLL_STATE_IDLE) {
			loadBitmap(firstVisiableItemIndex,visiableItemsCount);
		} else {
			cancleTasks();
		}
	}
	/**
	 * 删除task
	 */
	public void cancleTasks() {
		if(taskCollections != null) {
			for (WorkingTask task : taskCollections) {
				task.cancel(false);
			}
		}
	}
	
	@Override
	public void onScroll(AbsListView view, int firstVisibleItem,
			int visibleItemCount, int totalItemCount) {
		firstVisiableItemIndex = firstVisibleItem;
		visiableItemsCount = visibleItemCount;
		// 下载的任务应该由onScrollStateChanged里调用，但首次进入程序时onScrollStateChanged并不会调用，  
		// 因此在这里为首次进入程序开启下载任务。  
		if (isFirst && visibleItemCount > 0) {  
			loadBitmap(firstVisibleItem, visibleItemCount);
			isFirst = false;
		}
	}
	
	/**
	 * 下载内容
	 */
	private void loadBitmap(int first, int count) {
		for (int i = first; i < first + count; i++) {
			String imageUrl = list[i];
			Bitmap bitmap = getBitmapFromMemorySoftCache(imageUrl);
//			Bitmap bitmap = getBitmap(imageUrl);
			if(bitmap == null) {
				WorkingTask task = new WorkingTask();
				taskCollections.add(task);
				task.execute(imageUrl);
			} else {
				ImageView imageView = (ImageView) grid.findViewWithTag(imageUrl);
				if (imageView != null && bitmap != null) {  
					imageView.setImageBitmap(bitmap);
				}
			}
		}
	}
	
	public void setImageLists(String[] list) {
		this.list = list;
	}
	
	class Holder{
		ImageView image;
	}

}

在这个类中我用硬方法（注释掉部分），重现了OOM的情况：

可能有网友看了我的文章，下载了程序运行，没有出现我这个情况，可能你的手机比我的好啊！但是你再下载更大的图片时，应该会出现的。

在上面的这个类中方法注释的很明白，网友可以自己阅读。而当我我使用了软引用时，运行正常。我下载的图片在开发过程中完全满足啊！下面就用一个工具类将这些图片地址管理一下：Images.java

public class Images {

	public final static String[] imageUrls = {
		"http://www.33.la/uploads/20121212BZXH/8678.jpg",
		"http://pic1.bbzhi.com/chahuabizhi/katongsijifengjing-tonghuadongji/cartoon_vector_illustration_winter_60476_9.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/22/19/37912219/37912219_950.jpg",
        "http://www.sinaimg.cn/qc/area/photo/43/71/35534371/35534371_950.jpg",
        "http://www.sinaimg.cn/qc/area/photo/43/70/35534370/35534370_950.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/59/58/37765958/37765958_950.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/59/56/37765956/37765956_950.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/59/55/37765955/37765955_950.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/73/17/23087317/23087317_950.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/73/12/23087312/23087312_950.jpg",
        "http://img.anzhuo.im/public/picture/2012122401/1348137920992.jpg",
        "http://pic1.nipic.com/2008-11-25/200811252350274_2.jpg",
        "http://www.pp3.cn/uploads/20120321LW2/2.jpg",
        "http://www.sinaimg.cn/qc/photo_auto/photo/08/18/20460818/20460818_950.jpg",
        "http://a.hiphotos.baidu.com/zhidao/pic/item/30adcbef76094b360cccfb96a3cc7cd98d109d6b.jpg",
        "http://e.hiphotos.baidu.com/zhidao/pic/item/eaf81a4c510fd9f9836e9ac5252dd42a2834a425.jpg",
        "http://img2.niutuku.com/desk/1208/1305/ntk-1305-30510.jpg",
        "https://lh5.googleusercontent.com/-n7mdm7I7FGs/URqueT_BT-I/AAAAAAAAAbs/9MYmXlmpSAo/s160-c/Bonzai%252520Rock%252520Sunset.jpg",  
        "https://lh6.googleusercontent.com/-4CN4X4t0M1k/URqufPozWzI/AAAAAAAAAbs/8wK41lg1KPs/s160-c/Caterpillar.jpg",  
        "https://lh3.googleusercontent.com/-rrFnVC8xQEg/URqufdrLBaI/AAAAAAAAAbs/s69WYy_fl1E/s160-c/Chess.jpg",  
        "https://lh5.googleusercontent.com/-WVpRptWH8Yw/URqugh-QmDI/AAAAAAAAAbs/E-MgBgtlUWU/s160-c/Chihuly.jpg",  
        "https://lh5.googleusercontent.com/-0BDXkYmckbo/URquhKFW84I/AAAAAAAAAbs/ogQtHCTk2JQ/s160-c/Closed%252520Door.jpg",  
        "https://lh3.googleusercontent.com/-PyggXXZRykM/URquh-kVvoI/AAAAAAAAAbs/hFtDwhtrHHQ/s160-c/Colorado%252520River%252520Sunset.jpg",  
        "https://lh3.googleusercontent.com/-ZAs4dNZtALc/URquikvOCWI/AAAAAAAAAbs/DXz4h3dll1Y/s160-c/Colors%252520of%252520Autumn.jpg",  
        "https://lh4.googleusercontent.com/-GztnWEIiMz8/URqukVCU7bI/AAAAAAAAAbs/jo2Hjv6MZ6M/s160-c/Countryside.jpg",  
        "https://lh4.googleusercontent.com/-bEg9EZ9QoiM/URquklz3FGI/AAAAAAAAAbs/UUuv8Ac2BaE/s160-c/Death%252520Valley%252520-%252520Dunes.jpg",  
        "https://lh6.googleusercontent.com/-ijQJ8W68tEE/URqulGkvFEI/AAAAAAAAAbs/zPXvIwi_rFw/s160-c/Delicate%252520Arch.jpg",  
        "https://lh5.googleusercontent.com/-Oh8mMy2ieng/URqullDwehI/AAAAAAAAAbs/TbdeEfsaIZY/s160-c/Despair.jpg",  
        "https://lh5.googleusercontent.com/-gl0y4UiAOlk/URqumC_KjBI/AAAAAAAAAbs/PM1eT7dn4oo/s160-c/Eagle%252520Fall%252520Sunrise.jpg",  
        "https://lh3.googleusercontent.com/-hYYHd2_vXPQ/URqumtJa9eI/AAAAAAAAAbs/wAalXVkbSh0/s160-c/Electric%252520Storm.jpg",  
        "https://lh5.googleusercontent.com/-PyY_yiyjPTo/URqunUOhHFI/AAAAAAAAAbs/azZoULNuJXc/s160-c/False%252520Kiva.jpg",  
        "https://lh6.googleusercontent.com/-PYvLVdvXywk/URqunwd8hfI/AAAAAAAAAbs/qiMwgkFvf6I/s160-c/Fitzgerald%252520Streaks.jpg",  
        "https://lh4.googleusercontent.com/-KIR_UobIIqY/URquoCZ9SlI/AAAAAAAAAbs/Y4d4q8sXu4c/s160-c/Foggy%252520Sunset.jpg",  
        "https://lh6.googleusercontent.com/-9lzOk_OWZH0/URquoo4xYoI/AAAAAAAAAbs/AwgzHtNVCwU/s160-c/Frantic.jpg",  
        "https://lh3.googleusercontent.com/-0X3JNaKaz48/URqupH78wpI/AAAAAAAAAbs/lHXxu_zbH8s/s160-c/Golden%252520Gate%252520Afternoon.jpg",  
        "https://lh6.googleusercontent.com/-95sb5ag7ABc/URqupl95RDI/AAAAAAAAAbs/g73R20iVTRA/s160-c/Golden%252520Gate%252520Fog.jpg",  
        "https://lh3.googleusercontent.com/-JB9v6rtgHhk/URqup21F-zI/AAAAAAAAAbs/64Fb8qMZWXk/s160-c/Golden%252520Grass.jpg",  
        "https://lh4.googleusercontent.com/-EIBGfnuLtII/URquqVHwaRI/AAAAAAAAAbs/FA4McV2u8VE/s160-c/Grand%252520Teton.jpg",  
        "https://lh4.googleusercontent.com/-WoMxZvmN9nY/URquq1v2AoI/AAAAAAAAAbs/grj5uMhL6NA/s160-c/Grass%252520Closeup.jpg",  
        "https://lh3.googleusercontent.com/-6hZiEHXx64Q/URqurxvNdqI/AAAAAAAAAbs/kWMXM3o5OVI/s160-c/Green%252520Grass.jpg",  
        "https://lh5.googleusercontent.com/-6LVb9OXtQ60/URquteBFuKI/AAAAAAAAAbs/4F4kRgecwFs/s160-c/Hanging%252520Leaf.jpg",  
        "https://lh4.googleusercontent.com/-zAvf__52ONk/URqutT_IuxI/AAAAAAAAAbs/D_bcuc0thoU/s160-c/Highway%2525201.jpg",  
        "https://lh6.googleusercontent.com/-H4SrUg615rA/URquuL27fXI/AAAAAAAAAbs/4aEqJfiMsOU/s160-c/Horseshoe%252520Bend%252520Sunset.jpg",  
        "https://lh4.googleusercontent.com/-JhFi4fb_Pqw/URquuX-QXbI/AAAAAAAAAbs/IXpYUxuweYM/s160-c/Horseshoe%252520Bend.jpg",  
        "https://lh5.googleusercontent.com/-UGgssvFRJ7g/URquueyJzGI/AAAAAAAAAbs/yYIBlLT0toM/s160-c/Into%252520the%252520Blue.jpg",  
        "https://lh3.googleusercontent.com/-CH7KoupI7uI/URquu0FF__I/AAAAAAAAAbs/R7GDmI7v_G0/s160-c/Jelly%252520Fish%2525202.jpg",  
        "https://lh4.googleusercontent.com/-pwuuw6yhg8U/URquvPxR3FI/AAAAAAAAAbs/VNGk6f-tsGE/s160-c/Jelly%252520Fish%2525203.jpg",  
        "https://lh5.googleusercontent.com/-GoUQVw1fnFw/URquv6xbC0I/AAAAAAAAAbs/zEUVTQQ43Zc/s160-c/Kauai.jpg",  
        "https://lh6.googleusercontent.com/-8QdYYQEpYjw/URquwvdh88I/AAAAAAAAAbs/cktDy-ysfHo/s160-c/Kyoto%252520Sunset.jpg",  
        "https://lh4.googleusercontent.com/-vPeekyDjOE0/URquwzJ28qI/AAAAAAAAAbs/qxcyXULsZrg/s160-c/Lake%252520Tahoe%252520Colors.jpg",  
        "https://lh4.googleusercontent.com/-xBPxWpD4yxU/URquxWHk8AI/AAAAAAAAAbs/ARDPeDYPiMY/s160-c/Lava%252520from%252520the%252520Sky.jpg",  
        "https://lh3.googleusercontent.com/-897VXrJB6RE/URquxxxd-5I/AAAAAAAAAbs/j-Cz4T4YvIw/s160-c/Leica%25252050mm%252520Summilux.jpg",  
        "https://lh5.googleusercontent.com/-qSJ4D4iXzGo/URquyDWiJ1I/AAAAAAAAAbs/k2pBXeWehOA/s160-c/Leica%25252050mm%252520Summilux.jpg",  
        "https://lh6.googleusercontent.com/-dwlPg83vzLg/URquylTVuFI/AAAAAAAAAbs/G6SyQ8b4YsI/s160-c/Leica%252520M8%252520%252528Front%252529.jpg",  
        "https://lh3.googleusercontent.com/-R3_EYAyJvfk/URquzQBv8eI/AAAAAAAAAbs/b9xhpUM3pEI/s160-c/Light%252520to%252520Sand.jpg",  
        "https://lh3.googleusercontent.com/-fHY5h67QPi0/URqu0Cp4J1I/AAAAAAAAAbs/0lG6m94Z6vM/s160-c/Little%252520Bit%252520of%252520Paradise.jpg",  
        "https://lh5.googleusercontent.com/-TzF_LwrCnRM/URqu0RddPOI/AAAAAAAAAbs/gaj2dLiuX0s/s160-c/Lone%252520Pine%252520Sunset.jpg",  
        "https://lh3.googleusercontent.com/-4HdpJ4_DXU4/URqu046dJ9I/AAAAAAAAAbs/eBOodtk2_uk/s160-c/Lonely%252520Rock.jpg",  
        "https://lh6.googleusercontent.com/-erbF--z-W4s/URqu1ajSLkI/AAAAAAAAAbs/xjDCDO1INzM/s160-c/Longue%252520Vue.jpg",  
        "https://lh6.googleusercontent.com/-0CXJRdJaqvc/URqu1opNZNI/AAAAAAAAAbs/PFB2oPUU7Lk/s160-c/Look%252520Me%252520in%252520the%252520Eye.jpg",  
        "https://lh3.googleusercontent.com/-D_5lNxnDN6g/URqu2Tk7HVI/AAAAAAAAAbs/p0ddca9W__Y/s160-c/Lost%252520in%252520a%252520Field.jpg",  
        "https://lh6.googleusercontent.com/-flsqwMrIk2Q/URqu24PcmjI/AAAAAAAAAbs/5ocIH85XofM/s160-c/Marshall%252520Beach%252520Sunset.jpg",  
        "https://lh4.googleusercontent.com/-Y4lgryEVTmU/URqu28kG3gI/AAAAAAAAAbs/OjXpekqtbJ4/s160-c/Mono%252520Lake%252520Blue.jpg",  
        "https://lh4.googleusercontent.com/-AaHAJPmcGYA/URqu3PIldHI/AAAAAAAAAbs/lcTqk1SIcRs/s160-c/Monument%252520Valley%252520Overlook.jpg",  
        "https://lh4.googleusercontent.com/-vKxfdQ83dQA/URqu31Yq_BI/AAAAAAAAAbs/OUoGk_2AyfM/s160-c/Moving%252520Rock.jpg",  
        "https://lh5.googleusercontent.com/-CG62QiPpWXg/URqu4ia4vRI/AAAAAAAAAbs/0YOdqLAlcAc/s160-c/Napali%252520Coast.jpg",  
        "https://lh6.googleusercontent.com/-wdGrP5PMmJQ/URqu5PZvn7I/AAAAAAAAAbs/m0abEcdPXe4/s160-c/One%252520Wheel.jpg",  
        "https://lh6.googleusercontent.com/-6WS5DoCGuOA/URqu5qx1UgI/AAAAAAAAAbs/giMw2ixPvrY/s160-c/Open%252520Sky.jpg",  
        "https://lh6.googleusercontent.com/-u8EHKj8G8GQ/URqu55sM6yI/AAAAAAAAAbs/lIXX_GlTdmI/s160-c/Orange%252520Sunset.jpg",  
        "https://lh6.googleusercontent.com/-74Z5qj4bTDE/URqu6LSrJrI/AAAAAAAAAbs/XzmVkw90szQ/s160-c/Orchid.jpg",  
        "https://lh6.googleusercontent.com/-lEQE4h6TePE/URqu6t_lSkI/AAAAAAAAAbs/zvGYKOea_qY/s160-c/Over%252520there.jpg",  
        "https://lh5.googleusercontent.com/-cauH-53JH2M/URqu66v_USI/AAAAAAAAAbs/EucwwqclfKQ/s160-c/Plumes.jpg",  
        "https://lh3.googleusercontent.com/-eDLT2jHDoy4/URqu7axzkAI/AAAAAAAAAbs/iVZE-xJ7lZs/s160-c/Rainbokeh.jpg",  
        "https://lh5.googleusercontent.com/-j1NLqEFIyco/URqu8L1CGcI/AAAAAAAAAbs/aqZkgX66zlI/s160-c/Rainbow.jpg", 
        "https://lh6.googleusercontent.com/-55osAWw3x0Q/URquUtcFr5I/AAAAAAAAAbs/rWlj1RUKrYI/s160-c/A%252520Photographer.jpg",  
        "https://lh4.googleusercontent.com/--dq8niRp7W4/URquVgmXvgI/AAAAAAAAAbs/-gnuLQfNnBA/s160-c/A%252520Song%252520of%252520Ice%252520and%252520Fire.jpg",  
        "https://lh5.googleusercontent.com/-7qZeDtRKFKc/URquWZT1gOI/AAAAAAAAAbs/hqWgteyNXsg/s160-c/Another%252520Rockaway%252520Sunset.jpg",  
        "https://lh3.googleusercontent.com/--L0Km39l5J8/URquXHGcdNI/AAAAAAAAAbs/3ZrSJNrSomQ/s160-c/Antelope%252520Butte.jpg",  
        "https://lh6.googleusercontent.com/-8HO-4vIFnlw/URquZnsFgtI/AAAAAAAAAbs/WT8jViTF7vw/s160-c/Antelope%252520Hallway.jpg",  
        "https://lh4.googleusercontent.com/-WIuWgVcU3Qw/URqubRVcj4I/AAAAAAAAAbs/YvbwgGjwdIQ/s160-c/Antelope%252520Walls.jpg",  
        "https://lh6.googleusercontent.com/-UBmLbPELvoQ/URqucCdv0kI/AAAAAAAAAbs/IdNhr2VQoQs/s160-c/Apre%2525CC%252580s%252520la%252520Pluie.jpg",  
        "https://lh3.googleusercontent.com/-s-AFpvgSeew/URquc6dF-JI/AAAAAAAAAbs/Mt3xNGRUd68/s160-c/Backlit%252520Cloud.jpg",  
        "https://lh5.googleusercontent.com/-bvmif9a9YOQ/URquea3heHI/AAAAAAAAAbs/rcr6wyeQtAo/s160-c/Bee%252520and%252520Flower.jpg",  
        "https://lh5.googleusercontent.com/-DRnqmK0t4VU/URqu8XYN9yI/AAAAAAAAAbs/LgvF_592WLU/s160-c/Rice%252520Fields.jpg",  
        "https://lh3.googleusercontent.com/-hwh1v3EOGcQ/URqu8qOaKwI/AAAAAAAAAbs/IljRJRnbJGw/s160-c/Rockaway%252520Fire%252520Sky.jpg",  
        "https://lh5.googleusercontent.com/-wjV6FQk7tlk/URqu9jCQ8sI/AAAAAAAAAbs/RyYUpdo-c9o/s160-c/Rockaway%252520Flow.jpg",  
        "https://lh6.googleusercontent.com/-6cAXNfo7D20/URqu-BdzgPI/AAAAAAAAAbs/OmsYllzJqwo/s160-c/Rockaway%252520Sunset%252520Sky.jpg",  
        "https://lh3.googleusercontent.com/-sl8fpGPS-RE/URqu_BOkfgI/AAAAAAAAAbs/Dg2Fv-JxOeg/s160-c/Russian%252520Ridge%252520Sunset.jpg",  
        "https://lh6.googleusercontent.com/-gVtY36mMBIg/URqu_q91lkI/AAAAAAAAAbs/3CiFMBcy5MA/s160-c/Rust%252520Knot.jpg",  
        "https://lh6.googleusercontent.com/-GHeImuHqJBE/URqu_FKfVLI/AAAAAAAAAbs/axuEJeqam7Q/s160-c/Sailing%252520Stones.jpg",  
        "https://lh3.googleusercontent.com/-hBbYZjTOwGc/URqu_ycpIrI/AAAAAAAAAbs/nAdJUXnGJYE/s160-c/Seahorse.jpg",  
        "https://lh3.googleusercontent.com/-Iwi6-i6IexY/URqvAYZHsVI/AAAAAAAAAbs/5ETWl4qXsFE/s160-c/Shinjuku%252520Street.jpg",  
        "https://lh6.googleusercontent.com/-amhnySTM_MY/URqvAlb5KoI/AAAAAAAAAbs/pFCFgzlKsn0/s160-c/Sierra%252520Heavens.jpg",  
        "https://lh5.googleusercontent.com/-dJgjepFrYSo/URqvBVJZrAI/AAAAAAAAAbs/v-F5QWpYO6s/s160-c/Sierra%252520Sunset.jpg",  
        "https://lh4.googleusercontent.com/-Z4zGiC5nWdc/URqvBdEwivI/AAAAAAAAAbs/ZRZR1VJ84QA/s160-c/Sin%252520Lights.jpg",  
        "https://lh4.googleusercontent.com/-_0cYiWW8ccY/URqvBz3iM4I/AAAAAAAAAbs/9N_Wq8MhLTY/s160-c/Starry%252520Lake.jpg",  
        "https://lh3.googleusercontent.com/-A9LMoRyuQUA/URqvCYx_JoI/AAAAAAAAAbs/s7sde1Bz9cI/s160-c/Starry%252520Night.jpg",  
        "https://lh3.googleusercontent.com/-KtLJ3k858eY/URqvC_2h_bI/AAAAAAAAAbs/zzEBImwDA_g/s160-c/Stream.jpg",  
        "https://lh5.googleusercontent.com/-dFB7Lad6RcA/URqvDUftwWI/AAAAAAAAAbs/BrhoUtXTN7o/s160-c/Strip%252520Sunset.jpg",  
        "https://lh5.googleusercontent.com/-at6apgFiN20/URqvDyffUZI/AAAAAAAAAbs/clABCx171bE/s160-c/Sunset%252520Hills.jpg",  
        "https://lh4.googleusercontent.com/-7-EHhtQthII/URqvEYTk4vI/AAAAAAAAAbs/QSJZoB3YjVg/s160-c/Tenaya%252520Lake%2525202.jpg",  
        "https://lh6.googleusercontent.com/-8MrjV_a-Pok/URqvFC5repI/AAAAAAAAAbs/9inKTg9fbCE/s160-c/Tenaya%252520Lake.jpg",  
        "https://lh5.googleusercontent.com/-B1HW-z4zwao/URqvFWYRwUI/AAAAAAAAAbs/8Peli53Bs8I/s160-c/The%252520Cave%252520BW.jpg",  
        "https://lh3.googleusercontent.com/-PO4E-xZKAnQ/URqvGRqjYkI/AAAAAAAAAbs/42nyADFsXag/s160-c/The%252520Fisherman.jpg",  
        "https://lh4.googleusercontent.com/-iLyZlzfdy7s/URqvG0YScdI/AAAAAAAAAbs/1J9eDKmkXtk/s160-c/The%252520Night%252520is%252520Coming.jpg",  
        "https://lh6.googleusercontent.com/-G-k7YkkUco0/URqvHhah6fI/AAAAAAAAAbs/_taQQG7t0vo/s160-c/The%252520Road.jpg",  
        "https://lh6.googleusercontent.com/-h-ALJt7kSus/URqvIThqYfI/AAAAAAAAAbs/ejiv35olWS8/s160-c/Tokyo%252520Heights.jpg",  
        "https://lh5.googleusercontent.com/-Hy9k-TbS7xg/URqvIjQMOxI/AAAAAAAAAbs/RSpmmOATSkg/s160-c/Tokyo%252520Highway.jpg",  
        "https://lh6.googleusercontent.com/-83oOvMb4OZs/URqvJL0T7lI/AAAAAAAAAbs/c5TECZ6RONM/s160-c/Tokyo%252520Smog.jpg",  
        "https://lh3.googleusercontent.com/-FB-jfgREEfI/URqvJI3EXAI/AAAAAAAAAbs/XfyweiRF4v8/s160-c/Tufa%252520at%252520Night.jpg",  
        "https://lh4.googleusercontent.com/-vngKD5Z1U8w/URqvJUCEgPI/AAAAAAAAAbs/ulxCMVcU6EU/s160-c/Valley%252520Sunset.jpg",  
        "https://lh6.googleusercontent.com/-DOz5I2E2oMQ/URqvKMND1kI/AAAAAAAAAbs/Iqf0IsInleo/s160-c/Windmill%252520Sunrise.jpg",  
        "https://lh5.googleusercontent.com/-biyiyWcJ9MU/URqvKculiAI/AAAAAAAAAbs/jyPsCplJOpE/s160-c/Windmill.jpg",  
        "https://lh4.googleusercontent.com/-PDT167_xRdA/URqvK36mLcI/AAAAAAAAAbs/oi2ik9QseMI/s160-c/Windmills.jpg",  
        "https://lh5.googleusercontent.com/-kI_QdYx7VlU/URqvLXCB6gI/AAAAAAAAAbs/N31vlZ6u89o/s160-c/Yet%252520Another%252520Rockaway%252520Sunset.jpg",  
        "https://lh4.googleusercontent.com/-e9NHZ5k5MSs/URqvMIBZjtI/AAAAAAAAAbs/1fV810rDNfQ/s160-c/Yosemite%252520Tree.jpg"
	};
}

下面就是正常的运行效果图（其中有个别图没有加载完全由于SocketTimeOut），我这边无线网络不是很好。