小编Mik*_*ike的帖子

我在谷歌搜索过这个问题,但仍然没有办法解决问题.我有2个Makefile:一个作为示例,一个作为我的文件. 例:

BINDDIR=/src/binding
XBUILD=/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild
PROJECT_ROOT=XMBindingLibrarySample
PROJECT=$(PROJECT_ROOT)/XMBindingLibrarySample.xcodeproj
TARGET=XMBindingLibrarySample
BTOUCH=/Developer/MonoTouch/usr/bin/btouch

 XMBindingLibrary.dll
libXMBindingLibrarySample-i386.a:
$(XBUILD) -project $(PROJECT) -target $(TARGET) -sdk iphonesimulator -configuration Release clean build -mv $(PROJECT_ROOT)/build/Release-iphonesimulator/lib$(TARGET).a $@
libXMBindingLibrarySample-armv6.a:
$(XBUILD) -project $(PROJECT) -target $(TARGET) -sdk iphoneos -arch armv6 -configuration Release clean      build -mv $(PROJECT_ROOT)/build/Release-iphoneos/lib$(TARGET).a $@

libXMBindingLibrarySample-armv7.a:
$(XBUILD) -project $(PROJECT) -target $(TARGET) -sdk iphoneos -arch armv7 -configuration Release clean build -mv $(PROJECT_ROOT)/build/Release-iphoneos/lib$(TARGET).a $@

libXMBindingLibrarySampleUniversal.a: libXMBindingLibrarySample-armv7.a libXMBindingLibrarySample-i386.a
lipo -create -output $@ $^

XMBindingLibrary.dll: AssemblyInfo.cs XMBindingLibrarySample.cs extras.cs libXMBindingLibrarySampleUniversal.a

$(BTOUCH) -unsafe --outdir=tmp -out:$@ XMBindingLibrarySample.cs -x=AssemblyInfo.cs -x=extras.cs --link-with=libXMBindingLibrarySampleUniversal.a,libXMBindingLibrarySampleUniversal.a

clean: …

阅读有关SAM转换的Java互操作文档,我期待Kotlin函数

Collections.sortWith(comparator: kotlin.Comparator<in T> /* = java.util.Comparator<in T> */)

能够在不需要显式指定参数的情况下获取lambda函数是Comparator.但是,以下代码给出type inference failed:

val someNumbers = arrayListOf(1, 5, 2)
someNumbers.sortWith({ x, y -> 1 })

然而:

val someNumbers = arrayListOf(1, 5, 2)
someNumbers.sortWith(Comparator { x, y -> 1 })

编译并正确运行

我正在尝试在更改seekbar的值时实现触觉反馈。它可以在Android pre-P上正常运行。在Android P上根本不起作用。码：

private val vibrator = context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator?
private val effect by lazy { VibrationEffect.createOneShot(VIBRATION_DURATION, 50)}
...

fun vibrate() {
    if (vibrator == null || !vibrator.hasVibrator()) {
        return
    }
    vibrator.cancel()
    vibrator.vibrate(effect)