我希望能够使用绘图在画布上将一些文字（例如数量，最大可以为7个数字长（1000000））放在一个圆圈内。问题是，在某些设备屏幕上，文本超出了下面的圆的直径，我粘贴了用文本绘制自定义圆的代码。

到目前为止，代码我还可以在其中绘制圆和文本。该代码可以使用938之类的小数字，但是如果某些设备上的数字超过5个或更多，它将超出直径范围。

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

private var mViewWidth: Int = 0
private var mViewHeight: Int = 0
private val mStartAngle = -90f
private var mSweepAngle = 0f
private val mMaxSweepAngle = 360f
private var mStrokeWidth = 20
private val mAnimationDuration = 400
private val mMaxProgress = 100
private var mDrawText = true
private var amount:String? = null
private var currency:String? = null
private var mProgressColor = Color.BLACK
private var mTextColor = Color.BLACK

private val mPaint: Paint = Paint(Paint.ANTI_ALIAS_flaG)


override fun onDraw(canvas: Canvas) {
    super.onDraw(canvas)
    initMeasurements()
    drawBackGroundArch(canvas)
    drawOutlineArc(canvas)
    if (mDrawText) {
        drawPercentageText(canvas)
        drawAmountText(canvas)
    }
}

private fun initMeasurements() {
    mViewWidth = width
    mViewHeight = height
}

private fun drawOutlineArc(canvas: Canvas) {

    val diameter = min(mViewWidth,mViewHeight) - (mStrokeWidth -25)* 2

    val outerOval = RectF(
        mStrokeWidth.toFloat(),mStrokeWidth.toFloat(),diameter.toFloat(),diameter.toFloat()
    )

    mPaint.color = mProgressColor
    mPaint.strokeWidth = mStrokeWidth.toFloat()
    mPaint.isAntiAlias = true
    mPaint.strokeCap =  Paint.Cap.ROUND
    mPaint.style = Paint.Style.STROKE
    canvas.drawArc(outerOval,mStartAngle,mSweepAngle,false,mPaint)
}

private fun drawBackGroundArch(canvas: Canvas) {

    val diameter = min(mViewWidth,mViewHeight) - (mStrokeWidth -25) * 2

    val outerOval = RectF(
        mStrokeWidth.toFloat(),diameter.toFloat()
    )

    mPaint.color = Color.LTGRAY
    mPaint.strokeWidth = mStrokeWidth.toFloat()
    mPaint.isAntiAlias = true
    mPaint.strokeCap =  Paint.Cap.ROUND
    mPaint.style = Paint.Style.STROKE

    canvas.drawArc(outerOval,mMaxSweepAngle,mPaint)
}


private fun drawPercentageText(canvas: Canvas) {
    mPaint.textSize = mViewWidth.coerceAtMost(mViewHeight) / 7f
    mPaint.textAlign = Paint.Align.CENTER
    mPaint.strokeWidth = 0f
    mPaint.color = mTextColor

    // Center text
    val xPos = canvas.width / 2
    val yPos = (canvas.height / 2 - (mPaint.descent() + mPaint.ascent()) / 2).toInt() - 60

    canvas.drawText(
        calcProgressFromSweepAngle(mSweepAngle).toString() + "%",xPos.toFloat(),yPos.toFloat(),mPaint
    )
}

private fun drawAmountText(canvas: Canvas) {
    mPaint.textSize = mViewWidth.coerceAtMost(mViewHeight) / 11f
    mPaint.textAlign = Paint.Align.CENTER
    mPaint.strokeWidth = 0f
    mPaint.color = mTextColor

    // Center text
    val xPos = canvas.width / 2
    val yPos = (canvas.height / 2 - (mPaint.descent() + mPaint.ascent()) / 2).toInt() + 40

    canvas.drawText(amount +  " " + currency,mPaint
    )
}

private fun calcSweepAngleFromProgress(progress: Int): Float {
    return mMaxSweepAngle / mMaxProgress * progress
}

private fun calcProgressFromSweepAngle(sweepAngle: Float): Int {
    return (sweepAngle * mMaxProgress / mMaxSweepAngle).toInt()
}

fun setProgress(progress: Int) {
    val animator = ValueAnimator.ofFloat(mSweepAngle,calcSweepAngleFromProgress(progress))
    animator.interpolator = DecelerateInterpolator()
    animator.duration = mAnimationDuration.toLong()
    animator.addUpdateListener { valueAnimator ->
        mSweepAngle = valueAnimator.animatedValue as Float
        invalidate()
    }
    animator.start()
}

fun setProgressColor(color: Int) {
    mProgressColor = color
    invalidate()
}

fun setProgressWidth(width: Int) {
    mStrokeWidth = width
    invalidate()
}

  fun setamountText(amount:String){
      this.amount = amount
      invalidate()
  }

  fun setCurrencyType(currency:String){
    this.currency = currency
  }

  fun setTextColor(color: Int) {
    mTextColor = color
    invalidate()
   }
}

我正在寻找的解决方案是不允许文本超出圆直径。