Kotlin委托属性在Android Studio中导致预览渲染错误

分类：编程问答

如何解决Kotlin委托属性在Android Studio中导致预览渲染错误

我创建了一个自定义属性，专门用于保存需要对我的一个项目进行invalidate（）调用的视图的属性：

class InvalidatingProperty<T>(private var _value: T) {

    operator fun getValue(thisRef: View,property: KProperty<*>): T {
        return _value
    }

    operator fun setValue(thisRef: View,property: KProperty<*>,value: T) {
        _value = value
        thisRef.invalidate()
    }
}

在另一个项目中，我想重复使用我以前的一些工作，因此我将视图及其依赖项（包括InvalidatingProperty）复制到了一个新项目中。但是，在新项目中，使用InvalidatingProperty会导致预览渲染失败，并带有以下异常：

java.lang.NoSuchMethodError: kotlin.jvm.internal.MutablePropertyReference1Impl.<init>(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/String;I)V
    at com.gradesimulator.views.SummaryView.<clinit>(SummaryView.kt)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:403)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:186)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:144)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:309)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:416)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:427)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:331)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1123)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:1097)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:501)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:348)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:404)
    at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:141)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:678)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$8(RenderTask.java:809)
    at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

源项目（预览可以在其中运行）和目标项目都具有相同的android版本-4.0.1，使用相同版本的kotlin和kotlin gradle插件-1.4.0

重要的事实是，在仿真器或真实设备上，视图完全可以正常工作

我已经尝试过Invalidate Chaches / Restart，并且尝试降级Kotlin，因为我发现了有关1.4.0版本的问题，这些问题导致了类似的异常。

编辑：经过进一步检查，有时似乎会发生其他异常：

java.lang.NoClassDefFoundError: Could not initialize class com.gradesimulator.views.SummaryView
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:403)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:186)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:144)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:309)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:416)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:427)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:331)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1123)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:1097)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:501)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:348)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:404)
    at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:141)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:678)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$8(RenderTask.java:809)
    at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

压缩的摘要查看代码：

@Suppress("MemberVisibilityCanBePrivate","unused","PropertyName")
class SummaryView : View {

companion object {

    private const val TAG = "SummaryView"

    //primary circle
    const val DEFAULT_PRIMARY_CIRCLE_RADIUS_SCALE: Float = 1F

    const val DEFAULT_PRIMARY_CIRCLE_DISPLACEMENT: Float = 0.3F

    //secondary circle
    const val DEFAULT_SECONDARY_CIRCLE_RADIUS_SCALE: Float = 1F

    const val DEFAULT_ANIMATE_IN_SECONDARY_CIRCLE_DELAY: Long = 100

    const val DEFAULT_SECONDARY_CIRCLE_DISPLACEMENT: Float = 0.2F

    //both circles
    const val DEFAULT_CIRCLES_SHADOW_RADIUS: Float = 0F

    const val DEFAULT_CIRCLES_SHADOW_DISPLACEMENT: Float = 0F

    const val DEFAULT_ANIMATE_IN_CIRCLES_ANIMATION_DURATION: Long = 600

    //bigAverage
    const val DEFAULT_BIG_AVERAGE_SHADOW_DISPLACEMENT_X: Float = 0F

    const val DEFAULT_BIG_AVERAGE_SHADOW_DISPLACEMENT_Y: Float = 0F

    const val DEFAULT_BIG_AVERAGE_SHADOW_RADIUS: Float = 0F

    //smallAverage

    const val DEFAULT_SMALL_AVERAGE_SHADOW_DISPLACEMENT_X: Float = 0F

    const val DEFAULT_SMALL_AVERAGE_SHADOW_DISPLACEMENT_Y: Float = 0F

    const val DEFAULT_SMALL_AVERAGE_SHADOW_RADIUS: Float = 0F

    //average
    const val DEFAULT_AVERAGE_MARGIN: Float = 0.4F

    //progressArc
    const val DEFAULT_ANIMATE_IN_PROGRESS_ARC_ANIMATION_DURATION: Long = 1200

    const val DEFAULT_PROGRESS_ARC_MARGIN: Float = 0.2F

    const val DEFAULT_PROGRESS_ARC_WIDTH: Float = 0.1F

    const val DEFAULT_PROGRESS_ARC_START_ANGLE: Float = 10F

    const val DEFAULT_PROGRESS_ARC_VALUE: Float = 0.96F

    //progressArcDot
    const val DEFAULT_PROGRESS_ARC_DOT_RADIUS: Float = 1.5F

    //progressArcContent
    const val PROGRESS_ARC_CONTENT_DEFAULT_MARGIN = 0.4F

    const val DEFAULT_PROGRESS_ARC_CONTENT_TEXT = "Of the success!"

    const val DEFAULT_PROGRESS_ARC_CONTENT_INTERLINE = 0.1F

    const val PARTICLE_DATA_REGEX = ";"
}

//primaryCircle
val DEFAULT_PRIMARY_CIRCLE_COLOR: Int = Color.GRAY

//SecondaryCircle
val DEFAULT_SECONDARY_CIRCLE_COLOR: Int = Color.DKGRAY

//Both circles
val DEFAULT_CIRCLES_SHADOW_COLOR: Int = Color.BLACK

//bigAverage
val DEFAULT_BIG_AVERAGE_SHADOW_COLOR: Int = Color.BLACK

//smallAverage
val DEFAULT_SMALL_AVERAGE_SHADOW_COLOR: Int = Color.BLACK

//Averages
val DEFAULT_AVERAGE_COLOR: Int = Color.WHITE

//progressArc
val DEFAULT_PROGRESS_ARC_COLOR: Int = Color.WHITE

//progressArcDot
val PROGRESS_ARC_DOT_DEFAULT_COLOR = Color.WHITE

//progressArcContent
val DEFAULT_PROGRESS_ARC_CONTENT_COLOR = Color.WHITE

//particles
val DEFAULT_PARTICLE_COLOR = Color.DKGRAY

//View
var animateInCirclesAnimationDuration = DEFAULT_ANIMATE_IN_CIRCLES_ANIMATION_DURATION

var animateInProgressArcAnimationDuration = DEFAULT_ANIMATE_IN_PROGRESS_ARC_ANIMATION_DURATION

var animateInSecondaryCircleDelay = DEFAULT_ANIMATE_IN_SECONDARY_CIRCLE_DELAY

//Circles
private val primaryCirclePaint: Paint = Paint()

private val secondaryCirclePaint: Paint = Paint()

var primaryCircleCenterDisplacement: Float by InvalidatingProperty(
    DEFAULT_PRIMARY_CIRCLE_DISPLACEMENT
)

var secondaryCircleCenterDisplacement: Float by InvalidatingProperty(
    DEFAULT_SECONDARY_CIRCLE_DISPLACEMENT
)

var primaryCircleColor: Int
    set(value) {
        primaryCirclePaint.color = value
        invalidate()
    }
    get() = primaryCirclePaint.color

var secondaryCircleColor: Int
    set(value) {
        secondaryCirclePaint.color = value
        invalidate()
    }
    get() = secondaryCirclePaint.color

var primaryCircleRadiusSCale: Float by InvalidatingProperty(1F)

var secondaryCircleRadiusScale: Float by InvalidatingProperty(1F)

fun setCirclesShadow(radius: Float,dx: Float,dy: Float,color: Int) {
    primaryCirclePaint.setShadowLayer(radius,dx,dy,color)
    secondaryCirclePaint.setShadowLayer(radius,color)
}

fun setBigAverageShadow(radius: Float,color: Int) =
    bigAveragePaint.setShadowLayer(radius,color)

fun setSmallAverageShadow(radius: Float,color: Int) =
    smallAveragePaint.setShadowLayer(radius,color)

//Big Average
private val bigAveragePaint: TextPaint = TextPaint()

var bigAverageText: String by InvalidatingProperty("")

//SmallAverage
private val smallAveragePaint: TextPaint = TextPaint()

var smallAverageText: String by InvalidatingProperty("")

//Both averages
var averageMargin: Float by InvalidatingProperty(DEFAULT_AVERAGE_MARGIN)

var averageColor: Int
    get() = bigAveragePaint.color
    set(value) {
        bigAveragePaint.color = value
        smallAveragePaint.color = value
        invalidate()
    }

//Progress Arc
private val progressArcPaint: Paint = Paint()

var progressArcMargin: Float by InvalidatingProperty(DEFAULT_PROGRESS_ARC_MARGIN)

var progressArcStrokeWidth: Float by InvalidatingProperty(DEFAULT_PROGRESS_ARC_WIDTH)

var progressArcStartAngle: Float by InvalidatingProperty(DEFAULT_PROGRESS_ARC_START_ANGLE)

var progressArcValue: Float by InvalidatingProperty(DEFAULT_PROGRESS_ARC_VALUE)

private val progressArcRectF: RectF = RectF()

//ProgressArcDot
private val progressArcDotPaint = Paint()

var progressArcDotRadius: Float by InvalidatingProperty(DEFAULT_PROGRESS_ARC_DOT_RADIUS)

//Progress Arc Content
private val progressArcContentPaint: TextPaint = TextPaint()

val progressArcContentMargin: Float by InvalidatingProperty(PROGRESS_ARC_CONTENT_DEFAULT_MARGIN)

var progressArcContentColor: Int
    set(value) {
        progressArcContentPaint.color = value
        invalidate()
    }
    get() = progressArcContentPaint.color

var progressArcContentText: String by InvalidatingProperty(DEFAULT_PROGRESS_ARC_CONTENT_TEXT)

var progressArcContentTextInterline: Float by InvalidatingProperty(
    DEFAULT_PROGRESS_ARC_CONTENT_INTERLINE
)

//Particles
private val particlePaint: Paint = Paint()

private val particles: ParticleSet =
    ParticleSet(this)

var particlesColor: Int
    set(value) {
        particlePaint.color = value
        invalidate()
    }
    get() = particlePaint.color

//Util
private val textBoundsRect: Rect = Rect()
private val textBoundsRect2: Rect = Rect()


constructor(context: Context?) : super(context) {
    initView(null)
}

constructor(context: Context?,attrs: AttributeSet?) : super(context,attrs) {
    initView(attrs)
}

constructor(context: Context?,attrs: AttributeSet?,defStyleAttr: Int) : super(
    context,attrs,defStyleAttr
) {
    initView(attrs)
}

constructor(
    context: Context?,defStyleAttr: Int,defStyleRes: Int
) : super(context,defStyleAttr,defStyleRes) {
    initView(attrs)
}

private fun initView(attrs: AttributeSet?) { //code }

override fun onDraw(canvas: Canvas?) { // code }

解决方法

将kotlin-reflect版本更改为1.3.72对我有用：

implementation "org.jetbrains.kotlin:kotlin-reflect:1.3.72"
,

尝试使用您的视图在模块中设置“-Xno-optimized-callable-references”。帮助了我。

android {
...
    kotlinOptions {
...
        freeCompilerArgs = [
                "-Xno-optimized-callable-references"
        ]
    }
}

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