Add slice-builders-ktx usage.

Author: Douglas Sigelbaum

app/src/main/java/com/example/android/sliceviewer/provider/SampleSliceProvider.kt

@@ -25,6 +25,9 @@ import androidx.slice.Slice
 import androidx.slice.SliceProvider
 import androidx.slice.builders.ListBuilder
 import androidx.slice.builders.SliceAction
+import androidx.slice.builders.header
+import androidx.slice.builders.list
+import androidx.slice.builders.row
 import androidx.slice.core.SliceHints
 import androidx.slice.core.SliceHints.ICON_IMAGE
 import com.example.android.sliceviewer.R
@@ -34,7 +37,7 @@ class SampleSliceProvider : SliceProvider() {
         if (sliceUri == null || sliceUri.path == null) {
             return null
         }
-        return when(sliceUri.path) {
+        return when (sliceUri.path) {
             "/hello" -> createHelloWorldSlice(sliceUri)
             "/test" -> createTestSlice(sliceUri)
             else -> null
@@ -53,15 +56,13 @@ class SampleSliceProvider : SliceProvider() {
     }
 
     private fun createHelloWorldSlice(sliceUri: Uri): Slice {
-        return ListBuilder(context, sliceUri, ListBuilder.INFINITY)
-            .setHeader {
-                it.apply {
-                    setTitle("Hello World")
-                }
-            }.build()
+        return list(context, sliceUri, ListBuilder.INFINITY) {
+            header {
+                setTitle("Hello World")
+            }
+        }
     }
 
-
     private fun createTestSlice(sliceUri: Uri): Slice {
         val activityAction = SliceAction(
             PendingIntent.getActivity(
@@ -74,27 +75,23 @@ class SampleSliceProvider : SliceProvider() {
             ),
             "Go to app."
         )
-        return ListBuilder(context, sliceUri, SliceHints.INFINITY)
-            .setAccentColor(0x7f040047)
-            .setHeader {
-                it.apply {
-                    setTitle("Test Slice")
-                    setSubtitle("Slice for testing purposes")
-                    setSummary("Welcome to the basic Slice presenter.")
-                }
+        return list(context, sliceUri, SliceHints.INFINITY) {
+            setAccentColor(0x7f040047)
+            header {
+                setTitle("Test Slice")
+                setSubtitle("Slice for testing purposes")
+                setSummary("Welcome to the basic Slice presenter.")
             }
-            .addRow {
-                it.apply {
-                    setTitle("Example Row")
-                    setSubtitle("Row Subtitle")
-                    addEndItem(
-                        IconCompat.createWithResource(
-                            context, R.drawable.ic_arrow_forward_black_24dp
-                        ), ICON_IMAGE
-                    )
-                }
+            row {
+                setTitle("Example Row")
+                setSubtitle("Row Subtitle")
+                addEndItem(
+                    IconCompat.createWithResource(
+                        context, R.drawable.ic_arrow_forward_black_24dp
+                    ), ICON_IMAGE
+                )
             }
-            .addAction(activityAction)
-            .build()
+            addAction(activityAction)
+        }
     }
 }