EnvThirdResources.java 文件源码

private Drawable getCachedDrawable(LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) {
    synchronized (mAccessLock) {
        WeakReference<Drawable.ConstantState> wr = drawableCache.get(key);
        if (wr != null) {
            Drawable.ConstantState entry = wr.get();
            if (entry != null) {
                return entry.newDrawable(this);
            } else {
                drawableCache.delete(key);
            }
        }
    }
    return null;
}