我正在使用凌空从服务器在水平滑动视图中显示图像,但我的图像非常大,这是我得到内存不足的例外
以下是我的排球课程:
public class Volley{
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
public Volley(Context ctx) {
Log.v("Volley", "Volley onCreate");
mRequestQueue = com.android.volley.toolbox.Volley.newRequestQueue(ctx);
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
final int cacheSize = maxMemory / 8;
ImageLoader.ImageCache imageCache = new ImageLoader.ImageCache() {
LruCache<String, Bitmap> imageCache = new LruCache<String, Bitmap>(cacheSize);
@Override
public void putBitmap(String key, Bitmap value) {
imageCache.put(key, value);
}
@Override
public Bitmap getBitmap(String key) {
return imageCache.get(key);
}
};
mImageLoader = new ImageLoader(mRequestQueue, imageCache);
}
public void clear(Context ctx) {
mRequestQueue.cancelAll(ctx);
mImageLoader = null;
mRequestQueue = null;
}
public RequestQueue getRequestQueue() {
return mRequestQueue;
}
public ImageLoader getImageLoader() {
return mImageLoader;
}}
图片加载器代码:
image.setImageUrl(imagePhoto.url, getVolley(getContext()).getImageLoader());
public Volley getVolley(Context ctx) {
if(mVolley == null) {
mVolley = new Volley(getContext());
}
return mVolley;
}
> 06-10 22:14:27.462: E/AndroidRuntime(10060): FATAL EXCEPTION: Thread-29479
06-10 22:14:27.462: E/AndroidRuntime(10060): java.lang.OutOfMemoryError
06-10 22:14:27.462: E/AndroidRuntime(10060): at com.android.volley.toolbox.ByteArrayPool.getBuf(ByteArrayPool.java:101)
06-10 22:14:27.462: E/AndroidRuntime(10060): at com.android.volley.toolbox.PoolingByteArrayOutputStream.<init>(PoolingByteArrayOutputStream.java:53)
06-10 22:14:27.462: E/AndroidRuntime(10060): at com.android.volley.toolbox.BasicNetwork.entityToBytes(BasicNetwork.java:202)
06-10 22:14:27.462: E/AndroidRuntime(10060): at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:104)
06-10 22:14:27.462: E/AndroidRuntime(10060): at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:105)
答案 0 :(得分:5)
我确实解决了这个问题,为LruCache的BitmapLruCache提供了适当的缓存
public class BitmapLruCache extends LruCache<String, Bitmap> implements ImageLoader.ImageCache {
public static int getDefaultLruCacheSize() {
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
final int cacheSize = maxMemory / 8;
return cacheSize;
}
public BitmapLruCache() {
this(getDefaultLruCacheSize());
}
public BitmapLruCache(int sizeInKiloBytes) {
super(sizeInKiloBytes);
}
@Override
protected int sizeOf(String key, Bitmap value) {
return value.getRowBytes() * value.getHeight() / 1024;
}
@Override
public Bitmap getBitmap(String url) {
return get(url);
}
@Override
public void putBitmap(String url, Bitmap bitmap) {
put(url, bitmap);
}
}
这是链接: Android Volley ImageLoader - BitmapLruCache parameter?
答案 1 :(得分:0)
我不知道你的ImageLoader是如何实现的,但它可能会加载一个Bitmap。尝试在生成位图时将以下BitmapOption:inPurgeable设置为true。这样,当内存不足时,将清理位图内存。
看看这个问题:Why would I ever NOT use BitmapFactory's inPurgeable option?
答案 2 :(得分:0)
我不确定您是如何实现滑动视图的。但在大多数实现中(如viewpager),它将缓存3个或更多项。所以你真的不需要提供LRUCache来排球。
只需删除imageCache
的代码,您就会看到内存使用情况有所改善。