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first thank you, for your hep. but your way isn't possible. Because the file access methods like openFileOutput need the context of the main-activity. But I can't pass the context from a static function. This was my problem. But I solved it. I put a variable in the file access class to...

hi, after wasting a complete evening of useless trying I really need some help. I have an Activity with fragments and want to write and read files by clicking an a button or any other event from a fragment. The problem is, that I have to place the read and write methods in the mainActivity to...