android - HashMap, SparseArray in Android: multithread a concern?

Question

I know neither HashMap nor SparseArray are threadsafe. Do I have to worry about that if I have a central data repository as HashMap which can be accessed by the activity and potentially by an AsyncTask?

Would it be advisable to use a HashTable or better ConcurrentHashMap to be on the safe side?

Answer 1

是的，您将不得不担心线程安全。每当您围绕 HashMap 或 SparseArray 执行 IO 时，您都可以使用 HashTable、ConcurrentHashMap 或同步块。同步块的行为有点不同，可能会更慢，但对于简单的应用程序，这可能不是问题。