android - 使用 client-maven-plugin / GraalVM 和 BACK 事件的 JavaFX And​​roid 应用程序

Question

我设法使用来自 Gluon 的 client-maven-plugin 为 Android 创建了一个 JavaFX 应用程序。到目前为止一切都很好，但我没有设法对 Android 上的原生 BACK 导航做出反应。我尝试将键事件侦听器添加到场景中 - 它适用于桌面并允许对按下的 ESC 键做出反应，但在 Android 上甚至不调用事件处理程序。

我看到，事件本身到达 GraalVM，看起来它被解释为按下并释放 BACK 键：

02-17 20:46:52.937  8275  8275 V GraalActivity: Activity, process get key event, action = 0
02-17 20:46:52.937  8275  8275 I System.out: KeyEvent: KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_BACK, scanCode=0, metaState=0, flags=0x48, repeatCount=0, eventTime=244804749, downTime=244804749, deviceId=-1, source=0x101, displayId=0 } with action = 0
02-17 20:46:52.937  8275  8275 I System.out: [JVDBG] eventkeycode = 4 and jfxkc = ESCAPE with code 27
02-17 20:46:52.937  8275  8275 E GraalGluon: Native Dalvik layer has to dispatch key event, pass to native Graal layer with 1 chars...
02-17 20:46:52.937  8275  8275 E GraalGluon: passed count = 1 and realcount = 1
02-17 20:46:52.937  8275  8275 E GraalGluon: c0 = nd c1 = s
02-17 20:46:52.937  8275  8275 E GraalGluon: c0 = 1b and c1 = 7473
02-17 20:46:53.003  8275  8275 V GraalActivity: Activity, process get key event, action = 1
02-17 20:46:53.003  8275  8275 I System.out: KeyEvent: KeyEvent { action=ACTION_UP, keyCode=KEYCODE_BACK, scanCode=0, metaState=0, flags=0x48, repeatCount=0, eventTime=244804818, downTime=244804749, deviceId=-1, source=0x101, displayId=0 } with action = 1
02-17 20:46:53.003  8275  8275 E GraalGluon: Native Dalvik layer has to dispatch key event, pass to native Graal layer with 1 chars...
02-17 20:46:53.003  8275  8275 E GraalGluon: passed count = 1 and realcount = 1
02-17 20:46:53.003  8275  8275 E GraalGluon: c0 = nd c1 = s
02-17 20:46:53.003  8275  8275 E GraalGluon: c0 = 1b and c1 = 7473

我当前尝试捕获该键盘输入的是

scene.setOnKeyPressed(ev -> {
    System.out.println("onKeyPressed: "+ev.getCode() +" bzw. "+ev.getCharacter());
});

但从日志来看，它永远不会被调用。

所以：我需要做什么来处理这个事件？

标签： androidgluon-mobilegraalvmgraalvm-native-image