Cache

• use cache to store temporary files (kind of like browser history)
• use Context.getCacheDir() or Context.getExternalCacheDir()
• Each application has it's own reserved app-specific cache
• Android will clear your cache if it's in need of internal memory
• You should manage your own cache within your application (allow it to grow a maximum size, 5MB or so)
• see my CacheManager class for an example of cache management (note: not exactly perfect. there are some issues, but it has some basic management in terms of clearing based on max size)