更改kotlin中子字符串中的颜色

import android.graphics.Color
import android.text.SpannableString
import android.text.style.ForegroundColorSpan
import android.widget.TextView

fun TextView.setColoredSubstring(fullText: String, substring: String, color: Int) {
    val spannableString = SpannableString(fullText)
    val startIndex = fullText.indexOf(substring)
    if (startIndex != -1) {
        val endIndex = startIndex + substring.length
        spannableString.setSpan(ForegroundColorSpan(color), startIndex, endIndex, SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE)
    }
    this.text = spannableString
}

// 使用方法
val textView = findViewById<TextView>(R.id.textView)
textView.setColoredSubstring("Hello, World!", "World", Color.RED)

if (fullText.contains(substring)) {
    // 应用Span的操作
}

<!-- res/values/colors.xml -->
<color name="highlight_color">#FF0000</color>

textView.setColoredSubstring("Hello, World!", "World", resources.getColor(R.color.highlight_color))