Very cool! Congrats! Glad to see another android app on the play store built with gnustep!
Sent from my iPhone > On Oct 12, 2020, at 11:53 AM, Gregory Casamento <[email protected]> > wrote: > > > > Frederick, > > Congratulations, I am glad we could be a part of it! > > GC > >> On Mon, Oct 12, 2020 at 8:59 AM Umberto Cerrato <[email protected]> >> wrote: >> So cool! >> >> > Il giorno 12 ott 2020, alle ore 14:35, Frederik Seiffert >> > <[email protected]> ha scritto: >> > >> > Hi all, >> > >> > I’m happy to share that we launched our app "djay" on Android using >> > GNUstep: >> > https://play.google.com/store/apps/details?id=com.algoriddim.djay_free >> > >> > It’s using the Android toolchain scripts to cross-compile GNUstep and its >> > dependencies for Android: >> > https://github.com/gnustep/tools-android >> > >> > The basic setup is Clang with libobjc2 using the 2.0 runtime, GNUstep-Base >> > and libdispatch. Those components allow us to compile and run essentially >> > all of our existing non-UI / non-platform specific code for Android >> > without changes, which is multiple 100k LOC using ARC, on 4 ABIs >> > (armeabi-v7a, arm64-v8a, x86, x86_64). I’m still amazed how well it all >> > works. >> > >> > For the UI we went with Qt/QML, which turned out to be a great fit. Like >> > ObjC, Qt/QML is very dynamic at runtime, which enabled us to write some >> > glue code that lets us do two-way bindings between QML UI components and >> > our ObjC model using KVO/KVC. As the app is driven by Qt’s run loop, we’re >> > driving NSRunLoop and libdispatch from Qt, which is currently done by >> > swizzling NSRunLoop on launch. >> > >> > We also wrote a Java-ObjC bridge that allows us to register ObjC blocks as >> > native callbacks from Java (using libffi via Mike Ash’s MABlockClosure). >> > It e.g. allows us to hook into the Android notification system and call >> > ObjC methods when the user triggers playback controls on the home screen. >> > >> > It’s been a challenging but very rewarding project, and it’s also been >> > great to see how it improved our shared code base by forcing us to more >> > strictly separate platform-specific code. I’m also happy that we could >> > make some contributions to the GNUstep code base ourselves (67 PRs and >> > counting ;)). >> > >> > But most importantly we really could not have done it without the >> > incredible work and support from the GNUstep community, including Greg, >> > David, Fred, Richard, Niels, Ivan, and others. Thank you all for your help! >> > >> > Frederik >> > >> > > > > -- > Gregory Casamento > GNUstep Lead Developer / OLC, Principal Consultant > http://www.gnustep.org - http://heronsperch.blogspot.com > https://www.patreon.com/bePatron?u=352392 - Become a Patron > https://gf.me/u/x8m3sx - My GNUstep GoFundMe > https://teespring.com/stores/gnustep - Store
