Add url spanning

src/androidTest/java/androidx/core/text/SpannableStringBuilderTest.kt

@@ -29,6 +29,7 @@ import android.text.style.StrikethroughSpan
 import android.text.style.StyleSpan
 import android.text.style.SubscriptSpan
 import android.text.style.SuperscriptSpan
+import android.text.style.URLSpan
 import android.text.style.UnderlineSpan
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertSame
@@ -115,6 +116,24 @@ class SpannableStringBuilderTest {
         assertEquals(12, result.getSpanEnd(underline))
     }
 
+    @Test fun builderURL() {
+        val result: SpannedString = buildSpannedString {
+            append("Hello, ")
+            url("https://www.google.com") {
+                append("World")
+            }
+        }
+        assertEquals("Hello, World", result.toString())
+
+        val spans = result.getSpans<Any>()
+        assertEquals(1, spans.size)
+
+        val url = spans.filterIsInstance<URLSpan>().single()
+        assertEquals("https://www.google.com", url.url)
+        assertEquals(7, result.getSpanStart(url))
+        assertEquals(12, result.getSpanEnd(url))
+    }
+
     @Test fun builderColor() {
         val result: SpannedString = buildSpannedString {
             append("Hello, ")

src/main/java/androidx/core/text/SpannableStringBuilder.kt

@@ -28,6 +28,7 @@ import android.text.style.StrikethroughSpan
 import android.text.style.StyleSpan
 import android.text.style.SubscriptSpan
 import android.text.style.SuperscriptSpan
+import android.text.style.URLSpan
 import android.text.style.UnderlineSpan
 import androidx.annotation.ColorInt
 
@@ -99,6 +100,16 @@ inline fun SpannableStringBuilder.italic(builderAction: SpannableStringBuilder.(
 inline fun SpannableStringBuilder.underline(builderAction: SpannableStringBuilder.() -> Unit) =
     inSpans(UnderlineSpan(), builderAction = builderAction)
 
+/**
+ * Wrap appended text in [builderAction] in an [URLSpan].
+ *
+ * @see SpannableStringBuilder.inSpans
+ */
+inline fun SpannableStringBuilder.url(
+    url: String,
+    builderAction: SpannableStringBuilder.() -> Unit
+) = inSpans(URLSpan(url), builderAction = builderAction)
+
 /**
  * Wrap appended text in [builderAction] in a [ForegroundColorSpan].
  *