android - Using LruCache and avoid OutOfMemoryException

Question

There's an activity in my app whose showing around 1000 very small sized bitmaps (Around 20kb each bitmap). After it loads some of the bitmaps, there's an OutOfMemoryException.

I was first reading about SoftReference and it looked like it will solve my problem about the OOM exceptions. But then, I read that it won't cache my bitmaps and will free them "too soon", so it will have to decode the bitmap again and "waste" time.So, I implemented the LruCache.

How can I make sure that I will not get OOM exception when implementing my LruCache?

Maybe I should just use the SoftReference, because my main target is to avoid OOM

Or, this might be my solution? LruSoftCache

Answer 1

在实现时LruCache，你应该指定缓存大小，并告诉它如何计算每个对象的大小（在这种情况下，对象是位图）。

您可以使用以下示例：

// uses 1/8th of the memory for the cache
final int cacheSize = (int) (Runtime.getRuntime().maxMemory() / 8L);
LruCache bitmapCache = new LruCache(cacheSize) {
   protected int sizeOf(String key, Bitmap value) {
       return value.getByteCount();
}}