diff --git a/tools/split-select/Grouper_test.cpp b/tools/split-select/Grouper_test.cpp
index 7294a86..a8b78cd 100644
--- a/tools/split-select/Grouper_test.cpp
+++ b/tools/split-select/Grouper_test.cpp
@@ -179,7 +179,7 @@
             errorMessage.append("\n");
         }
     }
-    ADD_FAILURE() << errorMessage.string();
+    ADD_FAILURE() << errorMessage.c_str();
 }
 
 void GrouperTest::addSplit(Vector<SplitDescription>& splits, const char* str) {
diff --git a/tools/split-select/Main.cpp b/tools/split-select/Main.cpp
index e6966db..1e75117 100644
--- a/tools/split-select/Main.cpp
+++ b/tools/split-select/Main.cpp
@@ -99,8 +99,7 @@
         }
         masterRule = Rule::simplify(masterRule);
         fprintf(stdout, "  {\n    \"path\": \"%s\",\n    \"rules\": %s\n  }",
-                splits.keyAt(i).string(),
-                masterRule->toJson(2).string());
+                splits.keyAt(i).c_str(), masterRule->toJson(2).c_str());
     }
     fprintf(stdout, "\n]\n");
 }
@@ -158,25 +157,23 @@
         const char16_t* name = xml.getElementName(&len);
         String16 name16(name, len);
         if (name16 == kManifestTag) {
-            ssize_t idx = xml.indexOfAttribute(
-                    kAndroidNamespace.string(), kAndroidNamespace.size(),
-                    kVersionCodeAttr.string(), kVersionCodeAttr.size());
+            ssize_t idx = xml.indexOfAttribute(kAndroidNamespace.c_str(), kAndroidNamespace.size(),
+                                               kVersionCodeAttr.c_str(), kVersionCodeAttr.size());
             if (idx >= 0) {
                 outInfo.versionCode = xml.getAttributeData(idx);
             }
 
         } else if (name16 == kApplicationTag) {
-            ssize_t idx = xml.indexOfAttribute(
-                    kAndroidNamespace.string(), kAndroidNamespace.size(),
-                    kMultiArchAttr.string(), kMultiArchAttr.size());
+            ssize_t idx = xml.indexOfAttribute(kAndroidNamespace.c_str(), kAndroidNamespace.size(),
+                                               kMultiArchAttr.c_str(), kMultiArchAttr.size());
             if (idx >= 0) {
                 outInfo.multiArch = xml.getAttributeData(idx) != 0;
             }
 
         } else if (name16 == kUsesSdkTag) {
-            ssize_t idx = xml.indexOfAttribute(
-                    kAndroidNamespace.string(), kAndroidNamespace.size(),
-                    kMinSdkVersionAttr.string(), kMinSdkVersionAttr.size());
+            ssize_t idx =
+                    xml.indexOfAttribute(kAndroidNamespace.c_str(), kAndroidNamespace.size(),
+                                         kMinSdkVersionAttr.c_str(), kMinSdkVersionAttr.size());
             if (idx >= 0) {
                 uint16_t type = xml.getAttributeDataType(idx);
                 if (type >= Res_value::TYPE_FIRST_INT && type <= Res_value::TYPE_LAST_INT) {
@@ -187,10 +184,10 @@
                         fprintf(stderr, "warning: failed to retrieve android:minSdkVersion.\n");
                     } else {
                         char *endPtr;
-                        int minSdk = strtol(minSdk8->string(), &endPtr, 10);
-                        if (endPtr != minSdk8->string() + minSdk8->size()) {
+                        int minSdk = strtol(minSdk8->c_str(), &endPtr, 10);
+                        if (endPtr != minSdk8->c_str() + minSdk8->size()) {
                             fprintf(stderr, "warning: failed to parse android:minSdkVersion '%s'\n",
-                                    minSdk8->string());
+                                    minSdk8->c_str());
                         } else {
                             outInfo.minSdkVersion = minSdk;
                         }
@@ -232,7 +229,7 @@
             splits.add();
             Vector<String8> parts = AaptUtil::splitAndLowerCase(dir->getFileName(i), '-');
             if (parseAbi(parts, 0, &splits.editTop()) < 0) {
-                fprintf(stderr, "Malformed library %s\n", dir->getFileName(i).string());
+                fprintf(stderr, "Malformed library %s\n", dir->getFileName(i).c_str());
                 splits.pop();
             }
         }
@@ -291,7 +288,7 @@
             help();
             return 0;
         } else {
-            fprintf(stderr, "error: unknown argument '%s'.\n", arg.string());
+            fprintf(stderr, "error: unknown argument '%s'.\n", arg.c_str());
             usage();
             return 1;
         }
@@ -313,15 +310,14 @@
     // Find out some details about the base APK.
     AppInfo baseAppInfo;
     if (!getAppInfo(baseApkPath, baseAppInfo)) {
-        fprintf(stderr, "error: unable to read base APK: '%s'.\n", baseApkPath.string());
+        fprintf(stderr, "error: unable to read base APK: '%s'.\n", baseApkPath.c_str());
         return 1;
     }
 
     SplitDescription targetSplit;
     if (!generateFlag) {
         if (!SplitDescription::parse(targetConfigStr, &targetSplit)) {
-            fprintf(stderr, "error: invalid --target config: '%s'.\n",
-                    targetConfigStr.string());
+            fprintf(stderr, "error: invalid --target config: '%s'.\n", targetConfigStr.c_str());
             usage();
             return 1;
         }
@@ -341,7 +337,7 @@
         Vector<SplitDescription> splits = extractSplitDescriptionsFromApk(splitApkPaths[i]);
         if (splits.isEmpty()) {
             fprintf(stderr, "error: invalid --split path: '%s'. No splits found.\n",
-                    splitApkPaths[i].string());
+                    splitApkPaths[i].c_str());
             usage();
             return 1;
         }
@@ -364,7 +360,7 @@
         const size_t matchingSplitApkPathCount = matchingSplitPaths.size();
         for (size_t i = 0; i < matchingSplitApkPathCount; i++) {
             if (matchingSplitPaths[i] != baseApkPath) {
-                fprintf(stdout, "%s\n", matchingSplitPaths[i].string());
+                fprintf(stdout, "%s\n", matchingSplitPaths[i].c_str());
             }
         }
     } else {
diff --git a/tools/split-select/Rule_test.cpp b/tools/split-select/Rule_test.cpp
index c6cff0d..c78533f 100644
--- a/tools/split-select/Rule_test.cpp
+++ b/tools/split-select/Rule_test.cpp
@@ -68,7 +68,7 @@
     expected.erase(std::remove_if(expected.begin(), expected.end(), ::isspace), expected.end());
 
     // Result
-    std::string result(rule.toJson().string());
+    std::string result(rule.toJson().c_str());
     result.erase(std::remove_if(result.begin(), result.end(), ::isspace), result.end());
 
     ASSERT_EQ(expected, result);
diff --git a/tools/split-select/SplitDescription.cpp b/tools/split-select/SplitDescription.cpp
index 99bc23d..4e2b48e 100644
--- a/tools/split-select/SplitDescription.cpp
+++ b/tools/split-select/SplitDescription.cpp
@@ -134,8 +134,8 @@
     String8 configStr;
     String8 extensionStr;
     if (index >= 0) {
-        configStr.setTo(str.string(), index);
-        extensionStr.setTo(str.string() + index + 1);
+        configStr.setTo(str.c_str(), index);
+        extensionStr.setTo(str.c_str() + index + 1);
     } else {
         configStr.setTo(str);
     }
diff --git a/tools/split-select/TestRules.cpp b/tools/split-select/TestRules.cpp
index 86ccd6a..ca3c56f 100644
--- a/tools/split-select/TestRules.cpp
+++ b/tools/split-select/TestRules.cpp
@@ -78,9 +78,8 @@
     const String8 actualStr(actual != NULL ? actual->toJson() : String8());
 
     if (expectedStr != actualStr) {
-        return ::testing::AssertionFailure()
-                << "Expected: " << expectedStr.string() << "\n"
-                << "  Actual: " << actualStr.string();
+        return ::testing::AssertionFailure() << "Expected: " << expectedStr.c_str() << "\n"
+                                             << "  Actual: " << actualStr.c_str();
     }
     return ::testing::AssertionSuccess();
 }