diff --git a/android/util.go b/android/util.go
index 8dbf214..65c5f1b 100644
--- a/android/util.go
+++ b/android/util.go
@@ -79,6 +79,20 @@
 	return string(ret)
 }
 
+func SortedIntKeys(m interface{}) []int {
+	v := reflect.ValueOf(m)
+	if v.Kind() != reflect.Map {
+		panic(fmt.Sprintf("%#v is not a map", m))
+	}
+	keys := v.MapKeys()
+	s := make([]int, 0, len(keys))
+	for _, key := range keys {
+		s = append(s, int(key.Int()))
+	}
+	sort.Ints(s)
+	return s
+}
+
 func SortedStringKeys(m interface{}) []string {
 	v := reflect.ValueOf(m)
 	if v.Kind() != reflect.Map {
diff --git a/dexpreopt/config.go b/dexpreopt/config.go
index 064d9d9..1ff2a6e 100644
--- a/dexpreopt/config.go
+++ b/dexpreopt/config.go
@@ -17,7 +17,6 @@
 import (
 	"encoding/json"
 	"fmt"
-	"sort"
 	"strings"
 
 	"github.com/google/blueprint"
@@ -142,16 +141,6 @@
 	}
 }
 
-// Return sorted names of the libraries in the map.
-func (libPaths LibraryPaths) Names() []string {
-	keys := make([]string, 0, len(libPaths))
-	for k := range libPaths {
-		keys = append(keys, k)
-	}
-	sort.Strings(keys)
-	return keys
-}
-
 type ModuleConfig struct {
 	Name            string
 	DexLocation     string // dex location on device
diff --git a/dexpreopt/dexpreopt.go b/dexpreopt/dexpreopt.go
index 8c9f0a2..8deb0a3 100644
--- a/dexpreopt/dexpreopt.go
+++ b/dexpreopt/dexpreopt.go
@@ -37,7 +37,6 @@
 	"fmt"
 	"path/filepath"
 	"runtime"
-	"sort"
 	"strings"
 
 	"android/soong/android"
@@ -208,15 +207,6 @@
 
 const anySdkVersion int = 9999 // should go last in class loader context
 
-func (m classLoaderContextMap) getSortedKeys() []int {
-	keys := make([]int, 0, len(m))
-	for k := range m {
-		keys = append(keys, k)
-	}
-	sort.Ints(keys)
-	return keys
-}
-
 func (m classLoaderContextMap) getValue(sdkVer int) *classLoaderContext {
 	if _, ok := m[sdkVer]; !ok {
 		m[sdkVer] = &classLoaderContext{}
@@ -342,7 +332,7 @@
 		cmd := rule.Command().
 			Text(`eval "$(`).Tool(globalSoong.ConstructContext).
 			Text(` --target-sdk-version ${target_sdk_version}`)
-		for _, ver := range classLoaderContexts.getSortedKeys() {
+		for _, ver := range android.SortedIntKeys(classLoaderContexts) {
 			clc := classLoaderContexts.getValue(ver)
 			verString := fmt.Sprintf("%d", ver)
 			if ver == anySdkVersion {
diff --git a/java/androidmk.go b/java/androidmk.go
index 144268f..b1582d9 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -121,7 +121,7 @@
 						entries.SetPath("LOCAL_SOONG_JACOCO_REPORT_CLASSES_JAR", library.jacocoReportClassesFile)
 					}
 
-					entries.AddStrings("LOCAL_EXPORT_SDK_LIBRARIES", library.exportedSdkLibs.Names()...)
+					entries.AddStrings("LOCAL_EXPORT_SDK_LIBRARIES", android.SortedStringKeys(library.exportedSdkLibs)...)
 
 					if len(library.additionalCheckedModules) != 0 {
 						entries.AddStrings("LOCAL_ADDITIONAL_CHECKED_MODULE", library.additionalCheckedModules.Strings()...)
diff --git a/java/java_test.go b/java/java_test.go
index 0089545..0e93611 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -1495,7 +1495,7 @@
 	// test if baz has exported SDK lib names foo and bar to qux
 	qux := ctx.ModuleForTests("qux", "android_common")
 	if quxLib, ok := qux.Module().(*Library); ok {
-		sdkLibs := quxLib.ExportedSdkLibs().Names()
+		sdkLibs := android.SortedStringKeys(quxLib.ExportedSdkLibs())
 		if w := []string{"bar", "foo", "fred", "quuz"}; !reflect.DeepEqual(w, sdkLibs) {
 			t.Errorf("qux should export %q but exports %q", w, sdkLibs)
 		}