android – File.deleteOnExit – 来自评论的Unix技巧

栏目: Android · 发布时间: 6年前

内容简介：这个答案有一个很好的解释：翻译自：https://stackoverflow.com/questions/22606121/file-deleteonexit-unix-trick-from-comments

以下是此方法的源注释：

Note that onAndroid, the application lifecycle does not include VM termination,

so calling this method will not ensure that files are deleted. Instead, you should

use the most appropriate out of:

* Use a {@code finally} clause to manually invoke {@link #delete}.
 * Maintain your own set of files to delete, and process it at an appropriate point
    in your application's lifecycle.
 * Use the Unix trick of deleting the file as soon as all readers and writers have
   opened it. No new readers/writers will be able to access the file, but all existing
   ones will still have access until the last one closes the file.

任何人都可以向我解释它中提到的“Unix技巧”是什么以及如何使用它？

这个答案有一个很好的解释： https://stackoverflow.com/a/5219960/200508 .基本上,这意味着“删除”Unix系统上的文件不会立即从磁盘上删除它;相反,它只是从它所在的目录中删除对该文件的引用.该文件实际上不会被删除,直到所有使用它的进程终止.因此,您可以打开一个临时文件并立即删除它,然后每当程序终止时它将被自动擦除.

翻译自：https://stackoverflow.com/questions/22606121/file-deleteonexit-unix-trick-from-comments

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