diff --git a/java/builder.go b/java/builder.go
index 5d84d0b..02928df 100644
--- a/java/builder.go
+++ b/java/builder.go
@@ -258,6 +258,13 @@
 		},
 	)
 
+	ravenizer = pctx.AndroidStaticRule("ravenizer",
+		blueprint.RuleParams{
+			Command:     "rm -f $out && ${ravenizer} --in-jar $in --out-jar $out",
+			CommandDeps: []string{"${ravenizer}"},
+		},
+	)
+
 	zipalign = pctx.AndroidStaticRule("zipalign",
 		blueprint.RuleParams{
 			Command: "if ! ${config.ZipAlign} -c -p 4 $in > /dev/null; then " +
@@ -307,6 +314,7 @@
 	pctx.Import("android/soong/java/config")
 
 	pctx.HostBinToolVariable("aconfig", "aconfig")
+	pctx.HostBinToolVariable("ravenizer", "ravenizer")
 	pctx.HostBinToolVariable("keep-flagged-apis", "keep-flagged-apis")
 }
 
@@ -746,6 +754,16 @@
 	})
 }
 
+func TransformRavenizer(ctx android.ModuleContext, outputFile android.WritablePath,
+	inputFile android.Path) {
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        ravenizer,
+		Description: "ravenizer",
+		Output:      outputFile,
+		Input:       inputFile,
+	})
+}
+
 func GenerateMainClassManifest(ctx android.ModuleContext, outputFile android.WritablePath, mainClass string) {
 	android.WriteFileRule(ctx, outputFile, "Main-Class: "+mainClass+"\n")
 }