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androidcachingsd-card

How to enable android to delete cache on SDcard?

What must I do that Android can delete my cache files on the sdcard with the GUI?

I saved some data in /sdcard/Android/data/my.package.name/cache but Android tells me that my app has 0B cached data. That is wrong!

Solution

  • You should never hardwire paths -- for example, your path shown above is incorrect for most Android devices, as /sdcard is not where external storage resides. You should be using getExternalCacheDir() for external cache and getCacheDir() for internal cache.

    Bear in mind, as the documentation states:

    There is no guarantee when these files will be deleted. Note: you should not rely on the system deleting these files for you; you should always have a reasonable maximum, such as 1 MB, for the amount of space you consume with cache files, and prune those files when exceeding that space.

    (emphasis theirs)