diff --git a/contexthub/1.0/Android.bp b/contexthub/1.0/Android.bp
index e8f7103..93b3bf4 100644
--- a/contexthub/1.0/Android.bp
+++ b/contexthub/1.0/Android.bp
@@ -73,6 +73,47 @@
 }
 
 genrule {
+    name: "android.hardware.contexthub-V1.0-java_gen_java",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Ljava -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.contexthub@1.0",
+    srcs: [
+        ":android.hardware.contexthub@1.0_hal",
+    ],
+    out: [
+        "android/hardware/contexthub/V1_0/AsyncEventType.java",
+        "android/hardware/contexthub/V1_0/ContextHub.java",
+        "android/hardware/contexthub/V1_0/ContextHubMsg.java",
+        "android/hardware/contexthub/V1_0/HostEndPoint.java",
+        "android/hardware/contexthub/V1_0/HubAppInfo.java",
+        "android/hardware/contexthub/V1_0/HubMemoryFlag.java",
+        "android/hardware/contexthub/V1_0/HubMemoryType.java",
+        "android/hardware/contexthub/V1_0/MemRange.java",
+        "android/hardware/contexthub/V1_0/NanoAppBinary.java",
+        "android/hardware/contexthub/V1_0/NanoAppFlags.java",
+        "android/hardware/contexthub/V1_0/PhysicalSensor.java",
+        "android/hardware/contexthub/V1_0/Result.java",
+        "android/hardware/contexthub/V1_0/SensorType.java",
+        "android/hardware/contexthub/V1_0/TransactionResult.java",
+        "android/hardware/contexthub/V1_0/IContexthub.java",
+        "android/hardware/contexthub/V1_0/IContexthubCallback.java",
+    ],
+}
+
+java_library {
+    name: "android.hardware.contexthub-V1.0-java",
+    no_framework_libs: true,
+    defaults: ["hidl-java-module-defaults"],
+    srcs: [":android.hardware.contexthub-V1.0-java_gen_java"],
+    libs: [
+        "hwbinder",
+        "android.hidl.base-V1.0-java",
+    ]
+}
+
+// This package does not export any types. Not creating java constants export.
+
+
+genrule {
     name: "android.hardware.contexthub@1.0-adapter-helper_genc++",
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++-adapter-sources -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.contexthub@1.0",
@@ -98,7 +139,6 @@
     ],
 }
 
-
 cc_library {
     name: "android.hardware.contexthub@1.0-adapter-helper",
     defaults: ["hidl-module-defaults"],
diff --git a/contexthub/1.0/Android.mk b/contexthub/1.0/Android.mk
deleted file mode 100644
index 47bfd8f..0000000
--- a/contexthub/1.0/Android.mk
+++ /dev/null
@@ -1,334 +0,0 @@
-# This file is autogenerated by hidl-gen. Do not edit manually.
-
-LOCAL_PATH := $(call my-dir)
-
-################################################################################
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := android.hardware.contexthub-V1.0-java
-LOCAL_MODULE_CLASS := JAVA_LIBRARIES
-
-intermediates := $(call local-generated-sources-dir, COMMON)
-
-HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
-
-LOCAL_JAVA_LIBRARIES := \
-    android.hidl.base-V1.0-java \
-
-LOCAL_NO_STANDARD_LIBRARIES := true
-LOCAL_JAVA_LIBRARIES += core-oj hwbinder
-
-#
-# Build types.hal (AsyncEventType)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/AsyncEventType.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.AsyncEventType
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (ContextHub)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/ContextHub.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.ContextHub
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (ContextHubMsg)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/ContextHubMsg.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.ContextHubMsg
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (HostEndPoint)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/HostEndPoint.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.HostEndPoint
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (HubAppInfo)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/HubAppInfo.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.HubAppInfo
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (HubMemoryFlag)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/HubMemoryFlag.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.HubMemoryFlag
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (HubMemoryType)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/HubMemoryType.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.HubMemoryType
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (MemRange)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/MemRange.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.MemRange
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (NanoAppBinary)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/NanoAppBinary.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.NanoAppBinary
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (NanoAppFlags)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/NanoAppFlags.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.NanoAppFlags
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (PhysicalSensor)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/PhysicalSensor.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.PhysicalSensor
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (Result)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/Result.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.Result
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (SensorType)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/SensorType.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.SensorType
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build types.hal (TransactionResult)
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/TransactionResult.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::types.TransactionResult
-
-$(GEN): $(LOCAL_PATH)/types.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build IContexthub.hal
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/IContexthub.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthub.hal
-$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/IContexthubCallback.hal
-$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
-$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
-$(GEN): $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::IContexthub
-
-$(GEN): $(LOCAL_PATH)/IContexthub.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-
-#
-# Build IContexthubCallback.hal
-#
-GEN := $(intermediates)/android/hardware/contexthub/V1_0/IContexthubCallback.java
-$(GEN): $(HIDL)
-$(GEN): PRIVATE_HIDL := $(HIDL)
-$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IContexthubCallback.hal
-$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
-$(GEN): $(LOCAL_PATH)/types.hal
-$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
-$(GEN): PRIVATE_CUSTOM_TOOL = \
-        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
-        -Ljava \
-        -randroid.hardware:hardware/interfaces \
-        -randroid.hidl:system/libhidl/transport \
-        android.hardware.contexthub@1.0::IContexthubCallback
-
-$(GEN): $(LOCAL_PATH)/IContexthubCallback.hal
-	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(GEN)
-include $(BUILD_JAVA_LIBRARY)
-
-
-
-include $(call all-makefiles-under,$(LOCAL_PATH))