Jetpack Compose で Spannable 的なことをしたいときは AnnotatedString を作る

buildAnnotatedString 関数が用意されている。

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1. Text(  
2.    text = buildAnnotatedString {  
3.        append("By clicking blow you agree to our ")  
4.   
5.        withStyle(style = SpanStyle(textDecoration = TextDecoration.Underline)) {  
6.            append("Terms of Use")  
7.        }  
8.   
9.        append(" and consent \nto our ")  
10.          
11.        withStyle(style = SpanStyle(textDecoration = TextDecoration.Underline)) {  
12.            append("Privacy Policy")  
13.        }  
14.          
15.        append(".")  
16.    },  
17. )  

Text( text = buildAnnotatedString { append("By clicking blow you agree to our ") withStyle(style = SpanStyle(textDecoration = TextDecoration.Underline)) { append("Terms of Use") } append(" and consent \nto our ") withStyle(style = SpanStyle(textDecoration = TextDecoration.Underline)) { append("Privacy Policy") } append(".") }, ) SpanStyle か ParagraphStyle を指定する。

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1. class SpanStyle(  
2.     val color: Color = Color.Unspecified,  
3.     val fontSize: TextUnit = TextUnit.Unspecified,  
4.     val fontWeight: FontWeight? = null,  
5.     val fontStyle: FontStyle? = null,  
6.     val fontSynthesis: FontSynthesis? = null,  
7.     val fontFamily: FontFamily? = null,  
8.     val fontFeatureSettings: String? = null,  
9.     val letterSpacing: TextUnit = TextUnit.Unspecified,  
10.     val baselineShift: BaselineShift? = null,  
11.     val textGeometricTransform: TextGeometricTransform? = null,  
12.     val localeList: LocaleList? = null,  
13.     val background: Color = Color.Unspecified,  
14.     val textDecoration: TextDecoration? = null,  
15.     val shadow: Shadow? = null  
16. ) {  
17.   ...  
18. }  

class SpanStyle( val color: Color = Color.Unspecified, val fontSize: TextUnit = TextUnit.Unspecified, val fontWeight: FontWeight? = null, val fontStyle: FontStyle? = null, val fontSynthesis: FontSynthesis? = null, val fontFamily: FontFamily? = null, val fontFeatureSettings: String? = null, val letterSpacing: TextUnit = TextUnit.Unspecified, val baselineShift: BaselineShift? = null, val textGeometricTransform: TextGeometricTransform? = null, val localeList: LocaleList? = null, val background: Color = Color.Unspecified, val textDecoration: TextDecoration? = null, val shadow: Shadow? = null ) { ... }

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1. class ParagraphStyle constructor(  
2.     val textAlign: TextAlign? = null,  
3.     val textDirection: TextDirection? = null,  
4.     val lineHeight: TextUnit = TextUnit.Unspecified,  
5.     val textIndent: TextIndent? = null  
6. ) {  
7.   ...  
8. }  

class ParagraphStyle constructor( val textAlign: TextAlign? = null, val textDirection: TextDirection? = null, val lineHeight: TextUnit = TextUnit.Unspecified, val textIndent: TextIndent? = null ) { ... }