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
