0
java.lang.OutOfMemoryError: bitmap size exceeds VM budget.
このimageloaderクラスを使用してインターネットからgridviewに画像を更新しています。私は約1000枚の画像をダウンロードする必要がありますが、同じエラーが発生します。 同じように私を助けてください。「ビットマップサイズがVM予算を超えています」エラーを解決する方法はありますか？
public class ImageLoader {
public static HashMap<String, Bitmap> cache=new HashMap<String, Bitmap>();
private File cacheDir;
int i=0;
File f;
BitmapDrawable b;
public ImageLoader(Context context){
//Make the background thead low priority. This way it will not affect the UI performance
photoLoaderThread.setPriority(Thread.NORM_PRIORITY-1);
GridViewConfig.clearFilelist();
GridViewConfig.file_list=new ArrayList<String>();
//Find the dir to save cached images
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"LazyList");
else
cacheDir=context.getCacheDir();
if(!cacheDir.exists())
cacheDir.mkdirs();
}
final int stub_id=R.drawable.imagelistback_106x133;
public void DisplayImage(String url, Activity activity, ImageView imageView)
{
if(cache.containsKey(url))
{
/* if(Common.isgallery)
{
b=null;
b=new BitmapDrawable(cache.get(url));
Bitmap bb=Bitmap.createScaledBitmap(cache.get(url), 300, 300, true);
imageView.setImageBitmap(bb);
bb.recycle();
}
else
{*/
imageView.setImageBitmap(cache.get(url));
/* }*/
}
else
{
//Toast.makeText(activity, "ELSE in dISPLAY iMAGES", Toast.LENGTH_LONG).show();
queuePhoto(url, activity, imageView);
imageView.setImageResource(stub_id);
}
}
private void queuePhoto(String url, Activity activity, ImageView imageView)
{
//This ImageView may be used for other images before. So there may be some old tasks in the queue. We need to discard them.
photosQueue.Clean(imageView);
PhotoToLoad p=new PhotoToLoad(url, imageView);
synchronized(photosQueue.photosToLoad){
photosQueue.photosToLoad.push(p);
photosQueue.photosToLoad.notifyAll();
}
//start thread if it's not started yet
if(photoLoaderThread.getState()==Thread.State.NEW)
photoLoaderThread.start();
}
public void Createfile(String url)
{
String filename=String.valueOf(url.hashCode());
f=new File(cacheDir, filename);
GridViewConfig.file_list.add(f.getAbsolutePath());
}
public Bitmap getBitmap(String url)
{
//I identify images by hashcode. Not a perfect solution, good for the demo.
String filename=String.valueOf(url.hashCode());
//String filename=GridViewConfig.sku_list.get(i);
File f=new File(cacheDir, filename);
GridViewConfig.file_list.add(f.getAbsolutePath());
/*if(Common.firstLoading)
{
GridViewConfig.file_list.add(f.getAbsolutePath());
i++;
Log.v("gooooooooogle file list", "file list size "+i);
}*/
//from SD cache
Bitmap b = decodeFile(f);
if(b!=null)
return b;
//from web
try {
Bitmap bitmap=null;
InputStream is=new URL(url).openStream();
OutputStream os = new FileOutputStream(f);
Utils.CopyStream(is, os);
os.close();
bitmap = decodeFile(f);
return bitmap;
} catch (Exception ex){
ex.printStackTrace();
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;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=50;
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++;
}
Log.v("", "Scale"+scale);
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
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;
}
}
PhotosQueue photosQueue=new PhotosQueue();
public void stopThread()
{
photoLoaderThread.interrupt();
}
//stores list of photos to download
class PhotosQueue
{
private Stack<PhotoToLoad> photosToLoad=new Stack<PhotoToLoad>();
//removes all instances of this ImageView
public void Clean(ImageView image)
{
for(int j=0 ;j<photosToLoad.size();){
if(photosToLoad.get(j).imageView==image)
photosToLoad.remove(j);
else
++j;
}
}
}
class PhotosLoader extends Thread {
public void run() {
try {
while(true)
{
//thread waits until there are any images to load in the queue
if(photosQueue.photosToLoad.size()==0)
synchronized(photosQueue.photosToLoad){
photosQueue.photosToLoad.wait();
}
if(photosQueue.photosToLoad.size()!=0)
{
PhotoToLoad photoToLoad;
synchronized(photosQueue.photosToLoad){
photoToLoad=photosQueue.photosToLoad.pop();
}
Bitmap bmp=getBitmap(photoToLoad.url);
cache.put(photoToLoad.url, bmp);
if(((String)photoToLoad.imageView.getTag()).equals(photoToLoad.url)){
BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad.imageView);
Activity a=(Activity)photoToLoad.imageView.getContext();
a.runOnUiThread(bd);
}
}
if(Thread.interrupted())
break;
}
} catch (InterruptedException e) {
//allow thread to exit
}
}
}
PhotosLoader photoLoaderThread=new PhotosLoader();
//Used to display bitmap in the UI thread
class BitmapDisplayer implements Runnable
{
Bitmap bitmap;
ImageView imageView;
public BitmapDisplayer(Bitmap b, ImageView i)
{
bitmap=b;
imageView=i;
}
public void run()
{
if(bitmap!=null)
/*if(Common.isgallery)
{
b=null;
b=new BitmapDrawable(bitmap);
Bitmap bit=Bitmap.createScaledBitmap(bitmap, 300, 300, true);
imageView.setImageBitmap(bit);
bit.recycle();
}
else
{*/
imageView.setImageBitmap(bitmap);
/*}*/
else
imageView.setImageResource(stub_id);
}
}
public void clearCache() {
//clear memory cache
cache.clear();
//clear SD cache
File[] files=cacheDir.listFiles();
for(File f:files)
f.delete();
}
}
Sandrstarの提案は優れています。 - OMEが発生する前にGCがこれらのオブジェクトを解放するので、SoftReferenceのコレクションを選択してください。 - 削除されるアイテムと削除されるアイテムを詳細に制御するLRUキャッシュを見てください。 （本質的にLinkedHashMapを使用します） –
jagsaund