ARPT is an Android Resource Pruning Tool and it helps remove resources that are not related to a specific target product
Step1: Re-write your Android.mk file as following
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_PACKAGE_NAME := <YOUR PACKAGE NAME>
LOCAL_MODULE_TAGS := optional
LOCAL_CERTIFICATE := platform
ifeq (true, $(call is-greater-than, $(PLATFORM_SDK_VERSION), 30))
LOCAL_PRODUCT_MODULE := true
else
LOCAL_VENDOR_MODULE := true
endif
LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, app/src/main/res)
LOCAL_FULL_MANIFEST_FILE := $(addprefix $(LOCAL_PATH)/, app/src/main/AndroidManifest.xml)
ARPT_ENABLED := <true/false>
ifeq ($(ARPT_ENABLED),true)
include $(LOCAL_PATH)/arpt.mk
endif
$(info $(LOCAL_PACKAGE_NAME): LOCAL_RESOURCE_DIR: $(LOCAL_RESOURCE_DIR))
$(info $(LOCAL_PACKAGE_NAME): LOCAL_FULL_MANIFEST_FILE: $(LOCAL_FULL_MANIFEST_FILE))
include $(BUILD_RRO_PACKAGE)Step 2: Create another Makefile and name it to arpt.mk
ifneq (,$(LOCAL_RESOURCE_DIR))
$(info $(LOCAL_PACKAGE_NAME): start resource pruning for $(ARPT_TARGET_PRODUCT))
LOCAL_RESOURCE_DIR := $(foreach d,$(LOCAL_RESOURCE_DIR),$(call clean-path,$(d)))
ifneq ($(words $(LOCAL_RESOURCE_DIR)),1)
$(error $(LOCAL_PACKAGE_NAME): multiple LOCAL_RESOURCE_DIR not supported: $(LOCAL_RESOURCE_DIR))
endif
arpt_exec_file := $(LOCAL_PATH)/arpt.jar
arpt_rule_file := $(LOCAL_PATH)/arpt.xml
arpt_target_product := <YOUR TARGET PRODUCT NAME>
# DIR: out/target/common/obj/APPS/<YOUR PACKAGE NAME>_intermediates/arpt
arpt_intermediates_dir := $(call intermediates-dir-for,APPS,$(LOCAL_PACKAGE_NAME),,COMMON)/arpt
arpt_log_file := $(addprefix $(arpt_intermediates_dir)/, arpt.log)
arpt_source_resource_dir := $(LOCAL_RESOURCE_DIR)
arpt_target_resource_dir := $(addprefix $(arpt_intermediates_dir)/, res)
# COPY resource dir to intermediates dir
$(shell mkdir -p $(arpt_target_resource_dir) && rm -rf $(arpt_target_resource_dir))
$(shell cp -R $(arpt_source_resource_dir) $(arpt_target_resource_dir))
# DO resource pruning
arpt_result := $(shell java -jar $(arpt_exec_file) \
-rule $(arpt_rule_file) \
-target $(arpt_target_product) \
$(arpt_target_resource_dir) > $(arpt_log_file); echo $$?)
# CHECK status
$(info $(file <$(arpt_log_file)))
ifneq ($(arpt_result),0)
$(error $(LOCAL_PACKAGE_NAME): resource pruning failed!)
else
$(info $(LOCAL_PACKAGE_NAME): resource pruning completed successfully!)
endif
LOCAL_RESOURCE_DIR := $(arpt_target_resource_dir)
endifStep 3: Define the pruning rule in arpt.xml
<?xml version="1.0" encoding="utf-8" ?>
<resources>
<string availability="smith">
<item>camera_strings_object_tracking_title</item>
<item>camera_strings_object_tracking_description</item>
</string>
<string availability="smith|lisa">
<item>camera_strings_video_recording_device_too_hot</item>
</string>
<string-array availability="smith">
<item>camera_settings_video_quality_values</item>
</string-array>
<plurals availability="lisa">
<item>camera_strings_burst_capture_count</item>
</plurals>
<file availability="smith">
<item>drawable/camera_icons_asd_scene_car</item>
</file>
</resources>NOTE: In the sample above, all these 3 files are created in the root directory of the module