本文介绍了Textview Android Kotlin中的订单列表的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
嘿，我想在Android Kotlin的文本视图中按顺序列表显示文本。我试过Ordered List inside an Android Textview。我尝试了以下代码，它可以正常工作，但它没有匹配数字和文本的高度。我将分享我到目前为止所做的代码。
NumberIndentspan.kt
import android.graphics.Canvas
import android.graphics.Paint
import android.text.Layout
import android.text.style.LeadingMarginSpan
class NumberIndentSpan(
private val leadWidth: Int,
private val gapWidth: Int,
private val index: Int
) : LeadingMarginSpan {
override fun getLeadingMargin(first: Boolean): Int = leadWidth + gapWidth
override fun drawLeadingMargin(
c: Canvas?,
p: Paint?,
x: Int,
dir: Int,
top: Int,
baseline: Int,
bottom: Int,
text: CharSequence?,
start: Int,
end: Int,
first: Boolean,
layout: Layout?
) {
if (first) {
val orgStyle = p!!.style
p.style = Paint.Style.FILL
val width = p.measureText("4.")
c!!.drawText("$index.", (leadWidth + x - width / 2) * dir, bottom - p.descent(), p)
p.style = orgStyle
}
}
}
MainActivity.kt
val list = mutableListOf(
"Log in Google account
",
"Scroll to the page
",
"Tap disconnect from account to logout"
)
var number = 1
val builder = SpannableStringBuilder()
for (text in list) {
val contentStart: Int = builder.length
builder.append(text)
builder.setSpan(NumberIndentSpan(15, 15, number), contentStart, builder.length, 0)
number++
}
textView.text = builder
我要将数字和文本放在相同的高度。因为图像显示了我从这个代码中得到了什么。我也遇到了格式问题，如第一个点和第二个点文本开头不同，我想按顺序进行。我怎么才能修好所有这些东西。提前感谢
推荐答案
我遇到了同样的问题。这是因为您应用了自定义字体，并且很可能在Y定位期间没有考虑到额外的行距。
这是我的工作解决方案：https://gist.github.com/marcelpallares/ae6285ee0dcb3f04493991dcb18d01bd
class NumberIndentSpan(
private val number: Int,
private val leadWidth: Int = 15,
private val gapWidth: Int = 30,
) : LeadingMarginSpan {
override fun getLeadingMargin(first: Boolean): Int {
return leadWidth + gapWidth
}
override fun drawLeadingMargin(
canvas: Canvas,
paint: Paint,
x: Int,
dir: Int,
top: Int,
baseline: Int,
bottom: Int,
t: CharSequence?,
start: Int,
end: Int,
first: Boolean,
layout: Layout?
) {
if (first) {
val text = "$number."
val width = paint.measureText(text)
val yPosition = baseline.toFloat()
val xPosition = (leadWidth + x - width / 2) * dir
canvas.drawText(text, xPosition, yPosition, paint)
}
}
}
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