内存不足的错误,而使用LazyList中的ListView [英] Out Of memory error while using LazyList in ListView

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本文介绍了内存不足的错误,而使用LazyList中的ListView的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述


  

可能重复:结果
  <一href=\"http://stackoverflow.com/questions/13855413/out-of-memory-error-using-universal-image-loader-and-images-getting-refreshed\">Out使用通用图像装载机和图像内存错误得到刷新


我一直在关注教程上延迟加载列表视图,比我实现 LazyList 图像。在code是否正常工作按我的要求,但它是在某个阶段给内存不足的错误。我使用ImageLoader的,内存缓存,LazyAdapter,FileChache和utils的同一code。
这里是LazyAdapter类

 公共类LazyAdapter延伸BaseAdapter {    私人活动活动;
    私人的ArrayList&LT;串GT; movieThumbnail;
    私人的ArrayList&LT;串GT; movieText;
    私有静态LayoutInflater吹气= NULL;
    公共ImageLoader的ImageLoader的;    公共LazyAdapter(活动一,ArrayList的&LT;串GT; movieThumbnail,ArrayList的&LT;串GT; movieText){
        活性=一个;
        / *数据= D; * /
        this.movi​​eThumbnail = movieThumbnail;
        this.movi​​eText = movieText;
        吹气=(LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ImageLoader的=新ImageLoader的(activity.getApplicationContext());
    }    公众诠释的getCount(){
        返回movieText.size();
    }    公共对象的getItem(INT位置){
        返回的位置;
    }    众长getItemId(INT位置){
        返回的位置;
    }    公共查看getView(INT位置,查看convertView,父母的ViewGroup){
        查看VI = convertView;
        如果(convertView == NULL)
              VI = inflater.inflate(R.layout.listrow,NULL);        TextView的文本=(TextView的)vi.findViewById(R.id.rowListTextView);
        ImageView的图像=(ImageView的)vi.findViewById(R.id.movi​​eImage);
        text.setText(movieText.get(位置));
        imageLoader.DisplayImage(movieThumbnail.get(位置),图像);
        返回VI;
    }
}

的MemoryCache

 公共类的MemoryCache {    私有静态最后弦乐TAG =的MemoryCache;
    私人地图&LT;弦乐,位图&GT;缓存= Collections.synchronizedMap(
            新的LinkedHashMap&LT;弦乐,位图&GT;(10,1.5f,真实)); //最后一个参数如此LRU排序
    私人长期的大小= 0; //电流分配的大小
    私人长期限制= 1000000;以字节为单位//最大内存    公众的MemoryCache(){
        //使用可用堆大小的25%
        setLimit(调用Runtime.getRuntime()maxMemory()/ 6);
    }    公共无效setLimit(长NEW_LIMIT){
        极限= NEW_LIMIT;
        Log.i(TAG的MemoryCache会使用到限+ / 1024/1024 +MB);
    }    公共位图的get(字符串ID){
        尝试{
            如果(!cache.containsKey(ID))
                返回null;
            // NullPointerException异常有时会发生在这里的http://$c$c.google.com/p/osmdroid/issues/detail ID = 78
            返回cache.get(ID);
        }赶上(NullPointerException异常前){
            ex.printStackTrace();
            返回null;
        }
    }    公共无效认沽(字符串ID,位图位图){
        尝试{
            如果(cache.containsKey(ID))
                大小 - = getSizeInBytes(cache.get(ID));
            cache.put(ID,位图);
            大小+ = getSizeInBytes(位图);
            checkSize();
        }赶上(的Throwable日){
            th.printStackTrace();
        }
    }    私人无效checkSize(){
        Log.i(TAG,高速缓存大小=+尺寸+长度=+ cache.size());
        如果(大小&GT;限制){
            迭代器&LT;钥匙进入LT;弦乐,位图&GT;&GT; ITER = cache.entrySet()迭代器(); //最近最少访问的项目将是第一个迭代
            而(iter.hasNext()){
                进入&LT;弦乐,位图&GT;条目= iter.next();
                大小 - = getSizeInBytes(entry.getValue());
                iter.remove();
                如果(大小&LT; =极限)
                    打破;
            }
            Log.i(TAG,清洁缓存新的大小。+ cache.size());
        }
    }    公共无效清除(){
        尝试{
            // NullPointerException异常有时会发生在这里的http://$c$c.google.com/p/osmdroid/issues/detail ID = 78
            cache.clear();
            大小= 0;
        }赶上(NullPointerException异常前){
            ex.printStackTrace();
        }
    }    长getSizeInBytes(位图位图){
        如果(位图== NULL)
            返回0;
        返回bitmap.getRowBytes()* bitmap.getHeight();
    }
}

ImageLoade类

 公共类ImageLoader的{    的MemoryCache的MemoryCache =新的MemoryCache();
    FileCache fileCache;
    私人地图&LT; ImageView的,字符串&GT; imageViews = Collections.synchronizedMap(新的WeakHashMap&LT; ImageView的,字符串&GT;());
    ExecutorService的ExecutorService的;
    处理程序处理程序=新的处理程序(); //处理程序,以显示在UI线程图片    公共ImageLoader的(上下文的背景下){
        fileCache =新FileCache(背景);
        ExecutorService的= Executors.newFixedThreadPool(5);
    }    最终诠释stub_id = R.drawable.ic_launcher;
    公共无效DisplayImage(字符串URL,ImageView的ImageView的)
    {
        imageViews.put(ImageView的,URL);
        位图位图= memoryCache.get(URL);
        如果(位图!= NULL)
            imageView.setImageBitmap(位图);
        其他
        {
            queuePhoto(URL,ImageView的);
            imageView.setImageResource(stub_id);
        }
    }    私人无效queuePhoto(字符串URL,ImageView的ImageView的)
    {
        PhotoToLoad P =新PhotoToLoad(URL,ImageView的);
        executorService.submit(新PhotosLoader(P));
    }    私人位图getBitmap(字符串URL)
    {
        文件F = fileCache.getFile(URL);        //从SD缓存
        位图B =去codeFILE(F);
        如果(B!= NULL)            返回b;        //从网页
        尝试{
            位图位图= NULL;
            URL =图片网址新的URL(网址);
            HttpURLConnection的康恩=(HttpURLConnection类)imageUrl.openConnection();
            conn.setConnectTimeout(30000);
            conn.setReadTimeout(30000);
            conn.setInstanceFollowRedirects(真);
            InputStream为= conn.getInputStream();
            OutputStream的OS =新的FileOutputStream(F);
            Utils.CopyStream(是,OS);
            os.close();
           / *位=去codeFILE(F); * /
            返回位图;
        }赶上(Throwable的前){
           ex.printStackTrace();
           如果(前的instanceof的OutOfMemoryError)
               memoryCache.clear();
           返回null;
        }
    }    //德$ C $连拍影像的鳞它来减少内存消耗
    私人位图德codeFILE(文件f){
        尝试{
            //德code图像尺寸
            BitmapFactory.Options O =新BitmapFactory.Options();
            o.inJustDe codeBounds = TRUE;
            的FileInputStream流1 =新的FileInputStream(F);
            BitmapFactory.de codeStream(STREAM1,空,O);
            stream1.close();            //找到正确的比例值。它应该是2的幂。
            最终诠释REQUIRED_SIZE = 70;
            INT width_tmp = o.outWidth,height_tmp = o.outHeight;
            int标= 1;
            而(真){
                如果(width_tmp / 2'; REQUIRED_SIZE || height_tmp / 2版; REQUIRED_SIZE)
                    打破;
                width_tmp / = 2;
                height_tmp / = 2;
                规模* = 2;
            }            //德code。与inSampleSize
            BitmapFactory.Options O2 =新BitmapFactory.Options();
            o2.inSampleSize =规模;
            流2的FileInputStream =新的FileInputStream(F);
            位图位图= BitmapFactory.de codeStream(流2,空,O2);
            stream2.close();
            返回位图;
        }赶上(FileNotFoundException异常五){
        }
        赶上(IOException异常五){
            e.printStackTrace();
        }
        返回null;
    }    //任务队列
    私有类PhotoToLoad
    {
        公共字符串的URL;
        公共ImageView的ImageView的;
        公共PhotoToLoad(字符串U,ImageView的我){
            URL = U;
            ImageView的= I;
        }
    }    类PhotosLoader实现Runnable {
        PhotoToLoad photoToLoad;
        PhotosLoader(PhotoToLoad photoToLoad){
            this.photoToLoad = photoToLoad;
        }        @覆盖
        公共无效的run(){
            尝试{
                如果(imageViewReused(photoToLoad))
                    返回;
                BMP位图= getBitmap(photoToLoad.url);
                memoryCache.put(photoToLoad.url,BMP);
                如果(imageViewReused(photoToLoad))
                    返回;
                BitmapDisplayer BD =新BitmapDisplayer(BMP,photoToLoad);
                handler.post(BD);
            }赶上(的Throwable日){
                th.printStackTrace();
            }
        }
    }    布尔imageViewReused(PhotoToLoad photoToLoad){
        字符串标记= imageViews.get(photoToLoad.imageView);
        如果(标记== NULL ||!tag.equals(photoToLoad.url))
            返回true;
        返回false;
    }    //用在UI线程来显示位图
    类BitmapDisplayer实现Runnable
    {
        位图位图;
        PhotoToLoad photoToLoad;
        公共BitmapDisplayer(位图B,PhotoToLoad P){位= B; photoToLoad = P;}
        公共无效的run()
        {
            如果(imageViewReused(photoToLoad))
                返回;
            如果(位图!= NULL)
                photoToLoad.imageView.setImageBitmap(位图);
            其他
                photoToLoad.imageView.setImageResource(stub_id);
        }    }    公共无效clearCache(){
        memoryCache.clear();
        fileCache.clear();
    }}


解决方案

使用此方法图像加载这是当你使用滚动比力关闭不要创建问题

  MainClassActivity:
ArrayList的&LT; NewsItems&GT;新闻=新的ArrayList&LT; NewsItems&GT;();
    SetListView站;
       STA =新SetListView(MainActivity.this,新闻);
                    lv.setAdapter(STA);                    对于(NewsItems小号:新闻){
                            s.loadImage(STA);
                    }
        公共类SetListView延伸BaseAdapter {
            私人LayoutInflater吹气= NULL;
            活动活动;
            ArrayList的&LT; NewsItems&GT;一;
            公共SetListView(活动一,ArrayList的&LT; NewsItems - 酮)
            {
                this.activity =一个;
                吹气=(LayoutInflater)a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                this.one =之一;
            }            @覆盖
            公众诠释的getCount(){
                返回one.size();
            }            @覆盖
            公共对象的getItem(INT位置){
                返回的位置;
            }            @覆盖
            众长getItemId(INT位置){
                返回的位置;
            }            @覆盖
            公共查看getView(INT位置,查看convertView,父母的ViewGroup){
                查看VI = convertView;
                如果(convertView == NULL)
                    VI = inflater.inflate(R.layout.main1,NULL);
                TextView的TV1 =(TextView中)vi.findViewById(R.id.textView1);
                TextView中TV2 =(TextView中)vi.findViewById(R.id.textView2);
                tv1.setText(one.get(位置).get_title());
                tv2.setText(one.get(位置).get_pudDate());
        //位图BM = loadBitmap(one.get(位置).get_image());
                如果(one.get(位置).get_bm()!= NULL)
                    ((ImageView的)vi.findViewById(R.id.imageView1))setImageBitmap(one.get(位置).get_bm());
                其他
                    ((ImageView的)vi.findViewById(R.id.imageView1))setImageResource(R.drawable.ic_launcher)。
                返回VI;
            }        }
包com.dudhat.classes;进口java.io.BufferedInputStream中;
进口java.io.IOException异常;
进口的java.io.InputStream;
进口的java.net.URL;
进口java.net.URLConnection中;进口com.dudhat.rssfeeds.SetListView;进口android.graphics.Bitmap;
进口android.graphics.BitmapFactory;
进口android.os.AsyncTask;
进口android.util.Log;公共类NewsItems {
    私人SetListView站;
    串_title,_pudDate,_description,_image;
    位图_bm;    公共位图get_bm(){
        返回_bm;
    }    公共字符串get_image(){
        返回_image;
    }    公共字符串get_title(){
        返回_title;
    }    公共字符串get_pudDate(){
        返回_pudDate;
    }    公共字符串get_description(){
        返回_description;
    }
    公共SetListView getAdapter(){
        返回站;
    }    公共无效setAdapter(SetListView STA){
        this.sta =站;
    }
    公共NewsItems(字符串_title,字符串_pubdate,字符串_description,字符串_image,位图_bm)
    {
        this._description = _description;
        this._pudDate = _pubdate;
        this._title = _title;
        this._image = _image;
        this._bm = _bm;
    }
     公共无效的LoadImage(SetListView STA){
                 this.sta =站;
                 如果(_image =空&放大器;!&放大器;!_image.equals()){
                        新ImageLoadTask()执行(_image);
              }
             }
    私有类ImageLoadTask扩展的AsyncTask&LT;字符串,字符串,位图&GT; {        @覆盖
        在preExecute保护无效(){
            Log.i(ImageLoadTask,导入图像...);
        }        保护位图doInBackground(字符串参数...){
            Log.i(ImageLoadTask,试图加载图像URL:+参数[0]);
            尝试{
                位图B = loadBitmap(参数[0]);
                返回b;
            }赶上(例外五){
                e.printStackTrace();
                返回null;
            }
        }
        保护无效onPostExecute(位图RET){
            如果(RET!= NULL){
                _bm = RET;
                如果(STA!= NULL){
                    sta.notifyDataSetChanged();
                }
            }其他{
            }
        }
    }
    公共位图loadBitmap(字符串URL)
    {
        位图BM = NULL;
        InputStream为= NULL;
        二BufferedInputStream为= NULL;
        尝试
        {
            康涅狄格州的URLConnection =新的URL(网址).openConnection();
            conn.connect();
            是= conn.getInputStream();
            双=新的BufferedInputStream(是,8192);
            BM = BitmapFactory.de codeStream(之二);
        }
        赶上(例外五)
        {
            e.printStackTrace();
        }
        最后{
            如果(之二!= NULL)
            {
                尝试
                {
                    bis.close();
                }
                赶上(IOException异常E)
                {
                    e.printStackTrace();
                }
            }
            如果(是!= NULL)
            {
                尝试
                {
                    is.close();
                }
                赶上(IOException异常E)
                {
                    e.printStackTrace();
                }
            }
        }
        返回BM;
    }
}

Possible Duplicate:
Out Of memory error using Universal Image Loader and images getting refreshed

I have been following the Tutorials on lazy loading the images in a list view and than I implemented LazyList . The code is working properly as per my requirements however it is giving Out Of Memory Errors at some stages. I am using the same code of ImageLoader, Memory cache, LazyAdapter, FileChache and Utils. Here is LazyAdapter class

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<String> movieThumbnail;
    private ArrayList<String> movieText;
    private static LayoutInflater inflater=null;
    public ImageLoader imageLoader; 

    public LazyAdapter(Activity a, ArrayList<String> movieThumbnail, ArrayList<String> movieText) {
        activity = a;
        /*data=d;*/
        this.movieThumbnail = movieThumbnail;
        this.movieText = movieText;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public int getCount() {
        return movieText.size();
    }

    public Object getItem(int position) {
        return position;
    }

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

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
              vi = inflater.inflate(R.layout.listrow, null);

        TextView text=(TextView)vi.findViewById(R.id.rowListTextView);
        ImageView image=(ImageView)vi.findViewById(R.id.movieImage);
        text.setText(movieText.get(position));
        imageLoader.DisplayImage(movieThumbnail.get(position), image);
        return vi;
    }
}

MemoryCache

public class MemoryCache {

    private static final String TAG = "MemoryCache";
    private Map<String, Bitmap> cache=Collections.synchronizedMap(
            new LinkedHashMap<String, Bitmap>(10,1.5f,true));//Last argument true for LRU ordering
    private long size=0;//current allocated size
    private long limit=1000000;//max memory in bytes

    public MemoryCache(){
        //use 25% of available heap size
        setLimit(Runtime.getRuntime().maxMemory()/6);
    }

    public void setLimit(long new_limit){
        limit=new_limit;
        Log.i(TAG, "MemoryCache will use up to "+limit/1024./1024.+"MB");
    }

    public Bitmap get(String id){
        try{
            if(!cache.containsKey(id))
                return null;
            //NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78 
            return cache.get(id);
        }catch(NullPointerException ex){
            ex.printStackTrace();
            return null;
        }
    }

    public void put(String id, Bitmap bitmap){
        try{
            if(cache.containsKey(id))
                size-=getSizeInBytes(cache.get(id));
            cache.put(id, bitmap);
            size+=getSizeInBytes(bitmap);
            checkSize();
        }catch(Throwable th){
            th.printStackTrace();
        }
    }

    private void checkSize() {
        Log.i(TAG, "cache size="+size+" length="+cache.size());
        if(size>limit){
            Iterator<Entry<String, Bitmap>> iter=cache.entrySet().iterator();//least recently accessed item will be the first one iterated  
            while(iter.hasNext()){
                Entry<String, Bitmap> entry=iter.next();
                size-=getSizeInBytes(entry.getValue());
                iter.remove();
                if(size<=limit)
                    break;
            }
            Log.i(TAG, "Clean cache. New size "+cache.size());
        }
    }

    public void clear() {
        try{
            //NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78 
            cache.clear();
            size=0;
        }catch(NullPointerException ex){
            ex.printStackTrace();
        }
    }

    long getSizeInBytes(Bitmap bitmap) {
        if(bitmap==null)
            return 0;
        return bitmap.getRowBytes() * bitmap.getHeight();
    }
}

ImageLoade class

public class ImageLoader {

    MemoryCache memoryCache=new MemoryCache();
    FileCache fileCache;
    private Map<ImageView, String> imageViews=Collections.synchronizedMap(new WeakHashMap<ImageView, String>());
    ExecutorService executorService;
    Handler handler=new Handler();//handler to display images in UI thread

    public ImageLoader(Context context){
        fileCache=new FileCache(context);
        executorService=Executors.newFixedThreadPool(5);
    }

    final int stub_id=R.drawable.ic_launcher;
    public void DisplayImage(String url, ImageView imageView)
    {
        imageViews.put(imageView, url);
        Bitmap bitmap=memoryCache.get(url);
        if(bitmap!=null)
            imageView.setImageBitmap(bitmap);
        else
        {
            queuePhoto(url, imageView);
            imageView.setImageResource(stub_id);
        }
    }

    private void queuePhoto(String url, ImageView imageView)
    {
        PhotoToLoad p=new PhotoToLoad(url, imageView);
        executorService.submit(new PhotosLoader(p));
    }

    private Bitmap getBitmap(String url) 
    {
        File f=fileCache.getFile(url);

        //from SD cache
        Bitmap b = decodeFile(f);
        if(b!=null)

            return b;

        //from web
        try {
            Bitmap bitmap=null;
            URL imageUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();
            conn.setConnectTimeout(30000);
            conn.setReadTimeout(30000);
            conn.setInstanceFollowRedirects(true);
            InputStream is=conn.getInputStream();
            OutputStream os = new FileOutputStream(f);
            Utils.CopyStream(is, os);
            os.close();
           /* bitmap = decodeFile(f);*/
            return bitmap;
        } catch (Throwable ex){
           ex.printStackTrace();
           if(ex instanceof OutOfMemoryError)
               memoryCache.clear();
           return null;
        }
    }

    //decodes image and scales it to reduce memory consumption
    private Bitmap decodeFile(File f){
        try {
            //decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            FileInputStream stream1=new FileInputStream(f);
            BitmapFactory.decodeStream(stream1,null,o);
            stream1.close();

            //Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE=70;
            int width_tmp=o.outWidth, height_tmp=o.outHeight;
            int scale=1;
            while(true){
                if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
                    break;
                width_tmp/=2;
                height_tmp/=2;
                scale*=2;
            }

            //decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize=scale;
            FileInputStream stream2=new FileInputStream(f);
            Bitmap bitmap=BitmapFactory.decodeStream(stream2, null, o2);
            stream2.close();
            return bitmap;
        } catch (FileNotFoundException e) {
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    //Task for the queue
    private class PhotoToLoad
    {
        public String url;
        public ImageView imageView;
        public PhotoToLoad(String u, ImageView i){
            url=u; 
            imageView=i;
        }
    }

    class PhotosLoader implements Runnable {
        PhotoToLoad photoToLoad;
        PhotosLoader(PhotoToLoad photoToLoad){
            this.photoToLoad=photoToLoad;
        }

        @Override
        public void run() {
            try{
                if(imageViewReused(photoToLoad))
                    return;
                Bitmap bmp=getBitmap(photoToLoad.url);
                memoryCache.put(photoToLoad.url, bmp);
                if(imageViewReused(photoToLoad))
                    return;
                BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);
                handler.post(bd);
            }catch(Throwable th){
                th.printStackTrace();
            }
        }
    }

    boolean imageViewReused(PhotoToLoad photoToLoad){
        String tag=imageViews.get(photoToLoad.imageView);
        if(tag==null || !tag.equals(photoToLoad.url))
            return true;
        return false;
    }

    //Used to display bitmap in the UI thread
    class BitmapDisplayer implements Runnable
    {
        Bitmap bitmap;
        PhotoToLoad photoToLoad;
        public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;}
        public void run()
        {
            if(imageViewReused(photoToLoad))
                return;
            if(bitmap!=null)
                photoToLoad.imageView.setImageBitmap(bitmap);
            else
                photoToLoad.imageView.setImageResource(stub_id);
        }

    }

    public void clearCache() {
        memoryCache.clear();
        fileCache.clear();
    }

}

解决方案

use this method to Image load This is dont create problem when you use scrolling than force to close

    MainClassActivity:
ArrayList<NewsItems> news = new ArrayList<NewsItems>();
    SetListView sta;
       sta = new SetListView(MainActivity.this, news);
                    lv.setAdapter(sta);

                    for (NewsItems s : news) {
                            s.loadImage(sta);
                    }


        public class SetListView  extends BaseAdapter{
            private LayoutInflater inflater = null;
            Activity activity;
            ArrayList<NewsItems> one;
            public SetListView(Activity a,ArrayList<NewsItems> one)
            {
                this.activity = a;
                inflater = (LayoutInflater) a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                this.one = one;
            }

            @Override
            public int getCount() {
                return one.size();
            }

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

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

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View vi = convertView;
                if (convertView == null)
                    vi = inflater.inflate(R.layout.main1, null);
                TextView tv1 = (TextView) vi.findViewById(R.id.textView1);
                TextView tv2 = (TextView) vi.findViewById(R.id.textView2);
                tv1.setText(one.get(position).get_title());
                tv2.setText(one.get(position).get_pudDate());
        //      Bitmap bm = loadBitmap(one.get(position).get_image());
                if(one.get(position).get_bm() != null)
                    ((ImageView)vi.findViewById(R.id.imageView1)).setImageBitmap(one.get(position).get_bm());
                else
                    ((ImageView)vi.findViewById(R.id.imageView1)).setImageResource(R.drawable.ic_launcher);
                return vi;
            }

        }


package com.dudhat.classes;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import com.dudhat.rssfeeds.SetListView;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;

public class NewsItems {
    private SetListView sta;
    String _title,_pudDate,_description,_image;
    Bitmap _bm;

    public Bitmap get_bm() {
        return _bm;
    }

    public String get_image() {
        return _image;
    }

    public String get_title() {
        return _title;
    }

    public String get_pudDate() {
        return _pudDate;
    }

    public String get_description() {
        return _description;
    }
    public SetListView getAdapter() {
        return sta;
    }

    public void setAdapter(SetListView sta) {
        this.sta = sta;
    }
    public NewsItems(String _title,String _pubdate,String _description,String _image,Bitmap _bm)
    {
        this._description = _description;
        this._pudDate = _pubdate;
        this._title = _title;
        this._image = _image;
        this._bm = _bm;
    }
     public void loadImage(SetListView sta) {
                 this.sta = sta;
                 if (_image != null && !_image.equals("")) {
                        new ImageLoadTask().execute(_image);
              }
             }
    private class ImageLoadTask extends AsyncTask<String, String, Bitmap> {

        @Override
        protected void onPreExecute() {
            Log.i("ImageLoadTask", "Loading image...");
        }

        protected Bitmap doInBackground(String... param) {
            Log.i("ImageLoadTask", "Attempting to load image URL: " + param[0]);
            try {
                Bitmap b = loadBitmap(param[0]);
                return b;
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }
        protected void onPostExecute(Bitmap ret) {
            if (ret != null) {
                _bm = ret;
                if (sta != null) {
                    sta.notifyDataSetChanged();
                }
            } else {
            }
        }
    }
    public Bitmap loadBitmap(String url)
    {
        Bitmap bm = null;
        InputStream is = null;
        BufferedInputStream bis = null;
        try 
        {
            URLConnection conn = new URL(url).openConnection();
            conn.connect();
            is = conn.getInputStream();
            bis = new BufferedInputStream(is, 8192);
            bm = BitmapFactory.decodeStream(bis);
        }
        catch (Exception e) 
        {
            e.printStackTrace();
        }
        finally {
            if (bis != null) 
            {
                try 
                {
                    bis.close();
                }
                catch (IOException e) 
                {
                    e.printStackTrace();
                }
            }
            if (is != null) 
            {
                try 
                {
                    is.close();
                }
                catch (IOException e) 
                {
                    e.printStackTrace();
                }
            }
        }
        return bm;
    }
}

这篇关于内存不足的错误,而使用LazyList中的ListView的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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