java - SharedPreferences.Editor apply() 失败

Question

正如文档所说，

Unlike commit(), which writes its preferences out to persistent storage synchronously, apply() commits its changes to the in-memory SharedPreferences immediately but starts an asynchronous commit to disk and you won't be notified of any failures.

这是否意味着，如果出现某些故障(例如可用空间不足)，我的 SharedPreferences 将恢复到以前的状态，并且不会创建任何异常？我的应用会崩溃吗？

Answer 1

如这里所见 here ，在将更改写入文件之前，SharedPreferences 首先尝试创建一个备份文件。

如果成功:

Attempt to write the file, delete the backup and return true as atomically as possible. If any exception occurs, delete the new file; next time we will restore from the backup.

因此，不会抛出任何异常并且 SharedPreferences 将返回到以前的状态(因为它在将更改写入磁盘之前进行了备份)。 (尽管您不会收到任何失败通知)。