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Editorial Team
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Asked: 2026-06-14T03:51:54+00:00

maybe my question is a little stupid but I couldn’t find this answer. What

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maybe my question is a little stupid but I couldn’t find this answer.

What I’m doing is a backup of the APNs list.
I want to store the APNs list in a file. I already have the list of APNs but I want to store this list not as database but as a file.
Also this file needs to be read by my device to load all the list eventually.
Any one can guide me in the right direction?

Thanks!

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1 Answer

  1. Editorial Team

    Good news, you can use normal Java I/O facilities on Android. As well as Android-specific ones. You will need to decide whether to use external storage (SD card) or internal, or maybe shared preferences.

    For the Java I/O, you’l need to know how to associate Java streams with files. For things such as shared preferences, there are specific APIs.

    You could start from a good overview here. The concepts are there, as well as the keywords to google further:

    http://www.vogella.com/articles/AndroidFileBasedPersistence/article.html

    (Note that Environment.getExternalStorageDirectory() is the right approach, while hardcoded paths such as /sdcard or /mnt/sdcard, which you can find in some top-ranked examples, are wrong.)

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