Android 给我写一个Kotlin版本的MarqueeTextView

好的，以下是一个简单的Kotlin版本的MarqueeTextView：

import android.content.Context
import android.graphics.Rect
import android.util.AttributeSet
import androidx.appcompat.widget.AppCompatTextView

class MarqueeTextView @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : AppCompatTextView(context, attrs, defStyleAttr) {

    private val textRect = Rect()
    private var isMarqueeEnabled = true

    init {
        setSingleLine(true)
        ellipsize = null
    }

    override fun onTextChanged(text: CharSequence?, start: Int, lengthBefore: Int, lengthAfter: Int) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter)
        isMarqueeEnabled = textRect.width() > width
    }

    override fun isFocused(): Boolean {
        return isMarqueeEnabled
    }

    override fun onFocusChanged(focused: Boolean, direction: Int, previouslyFocusedRect: Rect?) {
        if (focused) {
            super.onFocusChanged(focused, direction, previouslyFocusedRect)
        }
    }

    override fun onWindowFocusChanged(hasWindowFocus: Boolean) {
        if (hasWindowFocus) {
            super.onWindowFocusChanged(hasWindowFocus)
        }
    }

    override fun computeScroll() {
        if (isMarqueeEnabled) {
            super.computeScroll()
        }
    }

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec)
        if (isMarqueeEnabled) {
            paint.getTextBounds(text.toString(), 0, text.length, textRect)
            setMeasuredDimension(textRect.width() + paddingLeft + paddingRight, measuredHeight)
        }
    }
}

使用时，只需在布局文件中使用`MarqueeTextView`替代`TextView`即可：

<com.example.myapplication.MarqueeTextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="This is a long text that will scroll if it's too wide for the view"
    android:singleLine="true"
    android:ellipsize="marquee" />

请注意，如果您的文本内容太短，无法触发滚动效果，请将`isMarqueeEnabled`属性设置为`true`以启用滚动。