wails 3 android slop, change source code of wails v3 stuff

$ GOOS=android GOARCH=arm64 go build -buildmode=c-shared -tags android,debug -buildvcs=false -gcflags=all="-l"
# github.com/wailsapp/wails/v3/pkg/application
../../../go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/events_common_android.go:9:9: undefined: events.Android
../../../go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/messageprocessor.go:199:16: undefined: iosMethodNames
../../../go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/application_android.go:436:17: not enough arguments in call to runtime.Core
	have ()
	want (map[string]any)

• …/…/…/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/events_common_android.go

//go:build android

package application

import "github.com/wailsapp/wails/v3/pkg/events"

// Map platform events → common events (same pattern as macOS & others)
//var commonApplicationEventMap = map[events.ApplicationEventType]events.ApplicationEventType{
//      //events.Android.ActivityCreated: //events.Common.ApplicationStarted,
//}

var commonApplicationEventMap = map[events.ApplicationEventType]events.ApplicationEventType{}

// setupCommonEvents forwards Android platform events to their common counterparts
func (a *androidApp) setupCommonEvents() {
        for sourceEvent, targetEvent := range commonApplicationEventMap {
                sourceEvent := sourceEvent
                targetEvent := targetEvent
                a.parent.Event.OnApplicationEvent(sourceEvent, func(event *ApplicationEvent) {
                        event.Id = uint(targetEvent)
                        androidLogf("info", "[events_common_android.go] Forwarding Android event %d → common %d", sourceEvent, targetEvent)
                        applicationEvents <- event
                })
        }
}

• …/…/…/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/messageprocessor.go

func (m *MessageProcessor) logRuntimeCall(req *RuntimeRequest) {
        objectName := objectNames[req.Object]

        methodName := ""
        switch req.Object {
        case callRequest:
                return // logs done separately in call processor
        case clipboardRequest:
                methodName = clipboardMethods[req.Method]
        case applicationRequest:
                methodName = applicationMethodNames[req.Method]
        case eventsRequest:
                methodName = eventsMethodNames[req.Method]
        case contextMenuRequest:
                methodName = contextmenuMethodNames[req.Method]
        case dialogRequest:
                methodName = dialogMethodNames[req.Method]
        case windowRequest:
                methodName = windowMethodNames[req.Method]
        case screensRequest:
                methodName = screensMethodNames[req.Method]
        case systemRequest:
                methodName = systemMethodNames[req.Method]
        case browserRequest:
                methodName = browserMethodNames[req.Method]
        case cancelCallRequest:
                methodName = "Cancel"
        case iosRequest:
                //methodName = iosMethodNames[req.Method]
        case androidRequest:
                methodName = androidMethodNames[req.Method]
        }

        m.Debug("Runtime call:", "method", objectName+"."+methodName, "args", req.Args.String())
}

• …/…/…/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/application_android.go

//export Java_com_wails_app_WailsBridge_nativeOnPageFinished
func Java_com_wails_app_WailsBridge_nativeOnPageFinished(env *C.JNIEnv, obj C.jobject, jurl C.jstring) {
        cUrl := C.jstringToC(env, jurl)
        defer C.releaseJString(env, jurl, cUrl)
        url := C.GoString(cUrl)

        androidLogf("info", " [JNI] nativeOnPageFinished called: %s", url)

        globalAppLock.RLock()
        app := globalApp
        globalAppLock.RUnlock()

        if app == nil {
                androidLogf("error", " [JNI] nativeOnPageFinished: app is nil")
                return
        }

        // Inject the runtime into the first window (with proper locking)
        app.windowsLock.RLock()
        windowCount := len(app.windows)
        androidLogf("info", " [JNI] nativeOnPageFinished: window count = %d", windowCount)
        for id, win := range app.windows {
                androidLogf("info", " [JNI] Found window ID: %d", id)
                if win != nil {
                        androidLogf("info", " [JNI] Injecting runtime.Core() into window %d", id)
                        // Get the runtime core JavaScript
                        //runtimeJS := runtime.Core()
                        //androidLogf("info", " [JNI] Runtime JS length: %d bytes", len(runtimeJS))
                        app.windowsLock.RUnlock()
                        // IMPORTANT: We must bypass win.ExecJS because it queues if runtimeLoaded is false.
                        // On Android, we need to inject the runtime directly since the runtime hasn't been loaded yet.
                        // This is the bootstrap injection that enables the runtime to load.
                        androidLogf("info", " [JNI] Calling executeJavaScript directly (bypassing queue)")
                        //executeJavaScript(runtimeJS)
                        // Emit event
                        app.Event.Emit("PageFinished", url)
                        return
                }
        }
        app.windowsLock.RUnlock()

        androidLogf("warn", " [JNI] nativeOnPageFinished: no windows found to inject runtime")
        // Emit event even if no windows
        app.Event.Emit("PageFinished", url)
}

and toolchain env variable setup for build libwails.so

export ANDROID_NDK=/home/etcix/Android/Sdk/ndk/29.0.13599879
export TOOLCHAIN=$ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64
export CGO_ENABLED=1
# [IMPORTANT] go cc compiler, don't use gcc
export CC=$TOOLCHAIN/bin/aarch64-linux-android29-clang
# I don't know below 3 line of code
export CGO_CC=$TOOLCHAIN/bin/aarch64-linux-android24-clang
export CGO_CFLAGS="-I$TOOLCHAIN/sysroot/usr/include -I$TOOLCHAIN/sysroot/usr/include/aarch64-linux-android"
export CGO_LDFLAGS="-L$TOOLCHAIN/sysroot/usr/lib/aarch64-linux-android/24 -llog"

# then next build libwails.so lib
GOOS=android GOARCH=arm64 go build -buildmode=c-shared -tags android,debug -buildvcs=false -gcflags=all="-l" -o libwails.so

here is android header include files output example

$ ls /home/etcix/Android/Sdk/ndk/29.0.13599879/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include
aarch64-linux-android  c++        errno.h     GLES3               limits.h  netdb.h     resolv.h               stdint.h     termios.h        video
aaudio                 camera     error.h     glob.h              link.h    netinet     riscv64-linux-android  stdio_ext.h  threads.h        vk_video
alloca.h               complex.h  execinfo.h  grp.h               linux     netpacket   sched.h                stdio.h      time64.h         vulkan
amidi                  cpio.h     fcntl.h     i686-linux-android  locale.h  nl_types.h  scsi                   stdlib.h     time.h           wait.h
android                ctype.h    features.h  iconv.h             malloc.h  OMXAL       search.h               string.h     uchar.h          wchar.h
ar.h                   dirent.h   fenv.h      ifaddrs.h           math.h    paths.h     semaphore.h            strings.h    uconfig_local.h  wctype.h
arm-linux-androideabi  dlfcn.h    fnmatch.h   inttypes.h          media     poll.h      setjmp.h               sys          ucontext.h       x86_64-linux-android
arpa                   drm        fts.h       jni.h               memory.h  pthread.h   signal.h               syscall.h    unicode          xen
asm-generic            EGL        ftw.h       KHR                 misc      pty.h       SLES                   sysexits.h   unistd.h         xlocale.h
assert.h               elf.h      getopt.h    langinfo.h          mntent.h  pwd.h       sound                  syslog.h     utime.h          zconf.h
bits                   endian.h   GLES        lastlog.h           mtd       rdma        spawn.h                tar.h        utmp.h           zlib.h
byteswap.h             err.h      GLES2       libgen.h            net       regex.h     stdatomic.h            termio.h     utmpx.h

android lib path example

$ ls /home/etcix/Android/Sdk/ndk/29.0.13599879/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/24
crtbegin_dynamic.o  crtend_android.o   libandroid.so     libc++.so  libEGL.so        libGLESv3.so       libmediandk.so   libOpenSLES.so  libz.so
crtbegin_so.o       crtend_so.o        libc++.a          libc.so    libGLESv1_CM.so  libjnigraphics.so  libm.so          libstdc++.so
crtbegin_static.o   crt_pad_segment.o  libcamera2ndk.so  libdl.so   libGLESv2.so     liblog.so          libOpenMAXAL.so  libvulkan.so

if want verbose build libwails.so or error log example

GOOS=android GOARCH=arm64 go build -v -x -a -buildmode=c-shared -tags android,debug -buildvcs=false -gcflags=all="-l" -o libwails.so

GOOS=android GOARCH=arm64 go build -buildmode=c-shared -tags android,debug -buildvcs=false -gcflags=all="-l" -o libwails.so 2&> error.log

ref links

• this note comes from lazydir: https://github.com/iercann/lazydir

more info

• actually I build out the libwails.so and copy to

$ pwd
/home/etcix/code/gotest/lazydir

$ ls build/android/app/src/main/jniLibs/arm64-v8a/libwails.so
build/android/app/src/main/jniLibs/arm64-v8a/libwails.so

• and build the android app and run it found error, see screenshots
  
• this experiment is fun even tought I failed, I really want to see wails 3 can handle android side now

footnote

• see wails repo issue #5020 and #5022, it maybe doc above error things