diff --git a/tools/aapt2/java/ManifestClassGenerator.cpp b/tools/aapt2/java/ManifestClassGenerator.cpp
index be67c9c8c03c9..10e504ec07523 100644
--- a/tools/aapt2/java/ManifestClassGenerator.cpp
+++ b/tools/aapt2/java/ManifestClassGenerator.cpp
@@ -26,21 +26,20 @@
 #include "util/Maybe.h"
 #include "xml/XmlDom.h"
 
-using ::android::StringPiece;
 using ::aapt::text::IsJavaIdentifier;
 
 namespace aapt {
 
-static Maybe<StringPiece> ExtractJavaIdentifier(IDiagnostics* diag, const Source& source,
+static Maybe<std::string> ExtractJavaIdentifier(IDiagnostics* diag, const Source& source,
                                                 const std::string& value) {
-  StringPiece result = value;
+  std::string result = value;
   size_t pos = value.rfind('.');
   if (pos != std::string::npos) {
     result = result.substr(pos + 1);
   }
 
   // Normalize only the java identifier, leave the original value unchanged.
-  if (result.contains("-")) {
+  if (result.find("-") != std::string::npos) {
     result = JavaClassGenerator::TransformToFieldName(result);
   }
 
@@ -64,7 +63,7 @@ static bool WriteSymbol(const Source& source, IDiagnostics* diag, xml::Element*
     return false;
   }
 
-  Maybe<StringPiece> result =
+  Maybe<std::string> result =
       ExtractJavaIdentifier(diag, source.WithLine(el->line_number), attr->value);
   if (!result) {
     return false;