我知道很多操作系统进行某种形式的锁定上的文件系统，以prevent不一致的意见。是否有任何保证，Java和/或Android做出的文件访问线程安全？我想知道尽可能多关于这个问题，可能之前我继续前进，写并发code自己。

I know that many OSes perform some sort of locking on the filesystem to prevent inconsistent views. Are there any guarantees that Java and/or Android make about thread-safety of file access? I would like to know as much about this as possible before I go ahead and write the concurrency code myself.

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推荐答案

Android基于Linux之上，因此继承了Linux的文件系统中的语义。除非你明确地锁定文件，多个应用程序和线程可以打开进行读/写访问。除非你真的需要跨进程的文件同步，我会建议使用普通的Java同步原语的仲裁访问该文件。

Android is built on top of Linux, so inherits Linux's filesystem semantics. Unless you explicitly lock a file, multiple applications and threads can open it for read/write access. Unless you actually need cross-process file synchronization, I would suggest using normal Java synchronization primitives for arbitrating access to the file.