diff --git a/java/java.go b/java/java.go
index 35fd7c2..1cb7943 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1664,6 +1664,8 @@
 	extractedSrcJar           android.WritablePath
 	// .dex of stubs, used for hiddenapi processing
 	dexJarFile OptionalDexJarPath
+
+	validationPaths android.Paths
 }
 
 type JavaApiLibraryProperties struct {
@@ -1699,6 +1701,12 @@
 	// The jar will also be passed to metalava as a classpath to
 	// generate compilable stubs.
 	System_modules *string
+
+	// If true, the module runs validation on the API signature files provided
+	// by the modules passed via api_contributions by checking if the files are
+	// in sync with the source Java files. However, the environment variable
+	// DISABLE_STUB_VALIDATION has precedence over this property.
+	Enable_validation *bool
 }
 
 func ApiLibraryFactory() android.Module {
@@ -1787,6 +1795,12 @@
 	}
 }
 
+func (al *ApiLibrary) addValidation(ctx android.ModuleContext, cmd *android.RuleBuilderCommand, validationPaths android.Paths) {
+	for _, validationPath := range validationPaths {
+		cmd.Validation(validationPath)
+	}
+}
+
 // This method extracts the stub class files from the stub jar file provided
 // from full_api_surface_stub module instead of compiling the srcjar generated from invoking metalava.
 // This method is used because metalava can generate compilable from-text stubs only when
@@ -1823,8 +1837,28 @@
 
 func (al *ApiLibrary) DepsMutator(ctx android.BottomUpMutatorContext) {
 	apiContributions := al.properties.Api_contributions
+	addValidations := !ctx.Config().IsEnvTrue("DISABLE_STUB_VALIDATION") &&
+		proptools.BoolDefault(al.properties.Enable_validation, true)
 	for _, apiContributionName := range apiContributions {
 		ctx.AddDependency(ctx.Module(), javaApiContributionTag, apiContributionName)
+
+		// Add the java_api_contribution module generating droidstubs module
+		// as dependency when validation adding conditions are met and
+		// the java_api_contribution module name has ".api.contribution" suffix.
+		// All droidstubs-generated modules possess the suffix in the name,
+		// but there is no such guarantee for tests.
+		if addValidations {
+			if strings.HasSuffix(apiContributionName, ".api.contribution") {
+				ctx.AddDependency(ctx.Module(), metalavaCurrentApiTimestampTag, strings.TrimSuffix(apiContributionName, ".api.contribution"))
+			} else {
+				ctx.ModuleErrorf("Validation is enabled for module %s but a "+
+					"current timestamp provider is not found for the api "+
+					"contribution %s",
+					ctx.ModuleName(),
+					apiContributionName,
+				)
+			}
+		}
 	}
 	ctx.AddVariationDependencies(nil, libTag, al.properties.Libs...)
 	ctx.AddVariationDependencies(nil, staticLibTag, al.properties.Static_libs...)
@@ -1862,8 +1896,7 @@
 		android.PathForModuleOut(ctx, "metalava.sbox.textproto")).
 		SandboxInputs()
 
-	var stubsDir android.OptionalPath
-	stubsDir = android.OptionalPathForPath(android.PathForModuleOut(ctx, "metalava", "stubsDir"))
+	stubsDir := android.OptionalPathForPath(android.PathForModuleOut(ctx, "metalava", "stubsDir"))
 	rule.Command().Text("rm -rf").Text(stubsDir.String())
 	rule.Command().Text("mkdir -p").Text(stubsDir.String())
 
@@ -1895,6 +1928,10 @@
 		case systemModulesTag:
 			module := dep.(SystemModulesProvider)
 			systemModulesPaths = append(systemModulesPaths, module.HeaderJars()...)
+		case metalavaCurrentApiTimestampTag:
+			if currentApiTimestampProvider, ok := dep.(currentApiTimestampProvider); ok {
+				al.validationPaths = append(al.validationPaths, currentApiTimestampProvider.CurrentApiTimestamp())
+			}
 		}
 	})
 
@@ -1918,6 +1955,8 @@
 		cmd.FlagWithInput("--migrate-nullness ", previousApi)
 	}
 
+	al.addValidation(ctx, cmd, al.validationPaths)
+
 	al.stubsSrcJar = android.PathForModuleOut(ctx, "metalava", ctx.ModuleName()+"-"+"stubs.srcjar")
 	al.stubsJarWithoutStaticLibs = android.PathForModuleOut(ctx, "metalava", "stubs.jar")
 	al.stubsJar = android.PathForModuleOut(ctx, ctx.ModuleName(), fmt.Sprintf("%s.jar", ctx.ModuleName()))