I have a Samsung Galaxy A5 2016 and I have Adobe Acrobat app installed. When I open an e-mail with PDF, Exel, or Word attachment on it doesn't open directly. I have to open Adobe Acrobat app to search for the file there and to open it. I want the file to be open when it's downloaded. Haw can I do that?
You can try the following steps to open pdf attachments directly in Adobe Acrobat-
For more information you can also refer to the help document Acrobat Reader Help for Android: Opening PDFs
Let us know if that helps.