is possible with Android, to share a bitmap not saved on the memory? Or I have to save the bitmap to a file, read it and next attach it?
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                    Yes you can save image in external storage see this link http://stackoverflow.com/questions/14053338/save-bitmap-in-android-as-jpeg-in-external-storage-in-a-folder – Narendra Kothamire Oct 27 '15 at 04:27
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                    Can't I avoid to save to external storage? – helloimyourmind Oct 27 '15 at 04:30
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                    You can save to internal storage search for the same – Narendra Kothamire Oct 27 '15 at 04:31
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                    The problem is: can't I directly send the bitmap instead of saving to a file and read again it? – helloimyourmind Oct 27 '15 at 04:32