pic download from web site

pic download from web site

enter code hereHi everyone.
I finished some android apps and run in AVD, everything is fine. However,
when the apps is downloaded to actual device, the result does not same as
AVD.
The issue is that when click a button, no pic is appeared on screen in
actual device.
The program is only read a picture from internal linux web server, the
file and folder permission is set as FULL (777), i believe that i would
like avoid any security issue happaning when make a requesting.
My code is captured to image.
"Permission" setting is set as "Internet" allowed.
I would like anyone to provide your comments. Many thanks