Android Question Read the file type from the content chooser

[Alexander Stolte]

Hello,

I select with the content chooser for example a .zip file, then I get the path: file%A339

How can I read the file type?

 

[Erel]

What do you need it for?

As discussed in the two other threads you made, it is a mistake to get the file path as it will not work in all cases.

 

[Alexander Stolte]

I do not want anyone to use my app, which he writes the file type himself, it must be possible somehow that this can be read out.

 

[Alexander Stolte]

I want to know only the file type does not like the path

 

[Erel]

If the path is available then you can check the file extension. If the path is not available then it is not possible.

 

[Alexander Stolte]

But why are some paths unavailable? I can send this without problems.

 

[DonManfred]

You send the filename? Why you need it then later. Just use your stored value!?
Where did you "send" it?

Maybe i did not understand the problem. I´m not talking about the fact that in some cases the path is not available.

To check the content i would suggest to read the first bytes (dont know how much)... Maybe you can see the content in the first bytes. A zip for ex. does have a special header (also a lot of other files)...

A zip file for ex. starts with PK\x03\x04
A PDF with %PDF


Additionally:
You can search for all files by yourself (see for ex my wildcard-class). you can check the extention on all found files easyly

 

[Alexander Stolte]

I've looked at your wildcard times. When I get the ContentChooser_Result thus the FileName as path specified, I get no result in the wildcard.

 

[DonManfred]

When i run my class over my external sdcard i get ALL files (not files from other apps) on my sdcard with the class.
Dont use my class with a path from content-chooser!

Use a real path on your device and scan this folder like you would do it with File.Listfiles

 

[Alexander Stolte]

Yes, but the user should be able to select the file, he does with the content chooser or is synonymous with your class?

 

[DonManfred]

like i already wrote in the past.

Using my class you need to build your own logic behind the files and folders you found (showing them, navigate through, select file/folder... But you are able to do

 

[Alexander Stolte]

thanks