private Drawable getCachedDrawable(@NonNull final Context context, final long key) {
    synchronized (mDrawableCacheLock) {
        final LongSparseArray<WeakReference<ConstantState>> cache
                = mDrawableCaches.get(context);
        if (cache == null) {
            return null;
        }

        final WeakReference<ConstantState> wr = cache.get(key);
        if (wr != null) {
            // We have the key, and the secret
            ConstantState entry = wr.get();
            if (entry != null) {
                return entry.newDrawable(context.getResources());
            } else {
                // Our entry has been purged
                cache.delete(key);
            }
        }
    }
    return null;
}
 

private boolean addDrawableToCache(@NonNull final Context context, final long key,
                                   @NonNull final Drawable drawable) {
    final ConstantState cs = drawable.getConstantState();
    if (cs != null) {
        synchronized (mDrawableCacheLock) {
            LongSparseArray<WeakReference<ConstantState>> cache = mDrawableCaches.get(context);
            if (cache == null) {
                cache = new LongSparseArray<>();
                mDrawableCaches.put(context, cache);
            }
            cache.put(key, new WeakReference<ConstantState>(cs));
        }
        return true;
    }
    return false;
}
 

private Drawable getCachedDrawable(@NonNull final Context context, final long key) {
    synchronized (mDrawableCacheLock) {
        final LongSparseArray<WeakReference<ConstantState>> cache
                = mDrawableCaches.get(context);
        if (cache == null) {
            return null;
        }

        final WeakReference<ConstantState> wr = cache.get(key);
        if (wr != null) {
            // We have the key, and the secret
            ConstantState entry = wr.get();
            if (entry != null) {
                return entry.newDrawable(context.getResources());
            } else {
                // Our entry has been purged
                cache.delete(key);
            }
        }
    }
    return null;
}
 

private boolean addDrawableToCache(@NonNull final Context context, final long key,
                                   @NonNull final Drawable drawable) {
    final ConstantState cs = drawable.getConstantState();
    if (cs != null) {
        synchronized (mDrawableCacheLock) {
            LongSparseArray<WeakReference<ConstantState>> cache = mDrawableCaches.get(context);
            if (cache == null) {
                cache = new LongSparseArray<>();
                mDrawableCaches.put(context, cache);
            }
            cache.put(key, new WeakReference<ConstantState>(cs));
        }
        return true;
    }
    return false;
}
 

public void onConfigurationChanged(@NonNull Context context) {
    synchronized (mDrawableCacheLock) {
        LongSparseArray<WeakReference<ConstantState>> cache = mDrawableCaches.get(context);
        if (cache != null) {
            // Crude, but we'll just clear the cache when the configuration changes
            cache.clear();
        }
    }
}
 

public void onConfigurationChanged(@NonNull Context context) {
    synchronized (mDrawableCacheLock) {
        LongSparseArray<WeakReference<ConstantState>> cache = mDrawableCaches.get(context);
        if (cache != null) {
            // Crude, but we'll just clear the cache when the configuration changes
            cache.clear();
        }
    }
}
 

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;
}
 

/**
 * @hide
 */
public LongSparseArray<ConstantState> getPreloadedDrawables() {
    return mResourcesImpl.getPreloadedDrawables();
}