For internal storage. On SD cards or internal "external" storage, it's world-readable: http://developer.android.com/guide/topics/data/data-storage.html#filesExt

For internal storage. On SD cards or internal "external" storage, it's world-readable: http://developer.android.com/guide/topics/data/data-storage.html#filesExternal http://developer.android.com/guide/topics/data/data-storage.... Relevant text: "Every Android-compatible device supports a shared "external storage" that you can use to save files. This can be a removable storage media (such as an SD card) or an internal (non-removable) storage. Files saved to the external storage are world-readable and can be modified by the user when they enable USB mass storage to transfer files on a computer." I forgot to specify that in my original post. My mistake.