最近要做一个Android 8.1 的launcher ，在Androidstudio上开发好基本功能后，移到Android源码中编译

1.在源码中创建代码目录

我开发基于展讯9820e平台，在如下目录创建好对应名字的文件夹

\vendor\sprd\platform\packages\apps\xxxLauncher

创建 res 和 src 目录，创建Android.mk文件，并将Androidstudio项目中的对应目录代码文件移入对应文件夹，清单文件直接放入项目根目录

res文件整个从Androidstudio项目中复制过来，src文件中，放入Androidstudio项目的java/com目录

2.编写Android.mk文件

#
# Copyright (C) 2013 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#LOCAL_PATH := $(call my-dir)#
# Build app code.
#
include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_STATIC_JAVA_LIBRARIES := android-support-v13 android-support-v7-appcompat\LOCAL_SRC_FILES := $(call all-java-files-under, src) \$(call all-renderscript-files-under, src) 
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res frameworks/support/v7/appcompat/resLOCAL_PRIVATE_PLATFORM_APIS := true
LOCAL_AAPT_FLAGS := --auto-add-overlay \--extra-packages android.support.v7.appcompat
LOCAL_USE_AAPT2 := true	
LOCAL_PACKAGE_NAME := xxxLauncher
LOCAL_PRIVILEGED_MODULE := trueLOCAL_CERTIFICATE := platform
LOCAL_OVERRIDES_PACKAGES := Home Launcher2 Launcher3 Launcher3Go SprdLauncher include $(BUILD_PACKAGE)
# ==================================================
include $(call all-makefiles-under,$(LOCAL_PATH))

mk文件中有大量可定义的属性，编译过程中也可能出现一些错误，通过修改mk文件即可解决，比如一些导包，依赖问题。

3.根据自己的项目需求，可能还需要配置一些平台mk文件，比如:

device\sprd\sharkle\sp9820e_1h10ll\sp9820e_1h10ll_base.mk#
# Copyright 2015 The Android Open-Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#PLATDIR := device/sprd/sharkle
PLATCOMM := $(PLATDIR)/common
TARGET_BOARD := sp9820e_1h10ll
BOARDDIR := $(PLATDIR)/$(TARGET_BOARD)
ROOTDIR := $(BOARDDIR)/rootdir
TARGET_BOARD_PLATFORM := sp9832eTARGET_GPU_PLATFORM := midgard
TARGET_NO_BOOTLOADER := falseUSE_XML_AUDIO_POLICY_CONF := 1VOLTE_SERVICE_ENABLE := true#Config Android Render With CPU; Default Android render with GPU
#GRAPHIC_RENDER_TYPE    := CPU# graphics
USE_SPRD_HWCOMPOSER  := true# copy media_profiles.xml before calling device.mk,
# because we want to use our file, not the common one
PRODUCT_COPY_FILES += $(BOARDDIR)/media_profiles.xml:$(TARGET_COPY_OUT_VENDOR)/etc/media_profiles_V1_0.xml \$(BOARDDIR)/media_profiles_turnkey.xml:$(TARGET_COPY_OUT_VENDOR)/etc/media_profiles_turnkey.xml#$(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
$(call inherit-product, $(SRC_TARGET_DIR)/product/full_base.mk)
$(call inherit-product, $(PLATCOMM)/DeviceCommon.mk)
$(call inherit-product, $(PLATCOMM)/proprietories.mk)
$(call inherit-product-if-exists, vendor/sprd/modules/libcamera/libcam_device.mk)BOARD_HAVE_SPRD_WCN_COMBO := sharkle
$(call inherit-product-if-exists, vendor/sprd/modules/wcn/connconfig/device-sprd-wcn.mk)#fstab
ifeq (f2fs,$(strip $(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE)))NORMAL_FSTAB_SUFFIX1 := .f2fs
endif
ifeq (true,$(strip $(BOARD_SECURE_BOOT_ENABLE)))NORMAL_FSTAB_SUFFIX2 :=
endif
NORMAL_FSTAB_SUFFIX := $(NORMAL_FSTAB_SUFFIX1)$(NORMAL_FSTAB_SUFFIX2)
# $(warning NORMAL_FSTAB=$(LOCAL_PATH)/rootdir/root/fstab$(NORMAL_FSTAB_SUFFIX).$(TARGET_BOARD))
PRODUCT_COPY_FILES += $(BOARDDIR)/rootdir/root/fstab.$(TARGET_BOARD)$(NORMAL_FSTAB_SUFFIX):root/fstab.$(TARGET_BOARD)PRODUCT_COPY_FILES += \$(BOARDDIR)/rootdir/root/init.$(TARGET_BOARD).rc:root/init.$(TARGET_BOARD).rc \$(ROOTDIR)/prodnv/PCBA.conf:$(TARGET_COPY_OUT_VENDOR)/etc/PCBA.conf \$(ROOTDIR)/prodnv/BBAT.conf:$(TARGET_COPY_OUT_VENDOR)/etc/BBAT.conf \$(ROOTDIR)/system/etc/audio_params/tiny_hw.xml:$(TARGET_COPY_OUT_VENDOR)/etc/tiny_hw.xml \$(ROOTDIR)/system/etc/audio_params/codec_pga.xml:$(TARGET_COPY_OUT_VENDOR)/etc/codec_pga.xml \$(ROOTDIR)/system/etc/audio_params/audio_hw.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_hw.xml \$(ROOTDIR)/system/etc/audio_params/audio_para:$(TARGET_COPY_OUT_VENDOR)/etc/audio_para \$(ROOTDIR)/system/etc/audio_params/smart_amp_init.bin:$(TARGET_COPY_OUT_VENDOR)/etc/smart_amp_init.bin \$(ROOTDIR)/system/etc/audio_params/record_tone_1.pcm:$(TARGET_COPY_OUT_VENDOR)/etc/record_tone_1.pcm \$(ROOTDIR)/system/etc/audio_params/record_tone_2.pcm:$(TARGET_COPY_OUT_VENDOR)/etc/record_tone_2.pcm \$(ROOTDIR)/system/etc/audio_params/rx_data.pcm:$(TARGET_COPY_OUT_VENDOR)/etc/rx_data.pcm \$(PLATCOMM)/rootdir/root/ueventd.common.rc:root/ueventd.$(TARGET_BOARD).rc \$(PLATCOMM)/rootdir/root/init.common.usb.rc:root/init.$(TARGET_BOARD).usb.rc \frameworks/native/data/etc/android.software.midi.xml:system/etc/permissions/android.software.midi.xml \frameworks/native/data/etc/android.hardware.camera.flash-autofocus.xml:system/etc/permissions/android.hardware.camera.flash-autofocus.xml \frameworks/native/data/etc/android.hardware.camera.front.xml:system/etc/permissions/android.hardware.camera.front.xml \frameworks/native/data/etc/android.hardware.opengles.aep.xml:system/etc/permissions/android.hardware.opengles.aep.xml \$(BOARDDIR)/log_conf/slog_modem_$(TARGET_BUILD_VARIANT).conf:vendor/etc/slog_modem.conf \$(BOARDDIR)/log_conf/slog_modem_cali.conf:vendor/etc/slog_modem_cali.conf \$(BOARDDIR)/log_conf/slog_modem_factory.conf:vendor/etc/slog_modem_factory.conf \$(BOARDDIR)/log_conf/slog_modem_autotest.conf:vendor/etc/slog_modem_autotest.conf#WLAN config
PRODUCT_PROPERTY_OVERRIDES += \ro.hotspot.enabled = 1 \reset_default_http_response = true \ro.void_charge_tip = true \ro.softaplte.coexist = true \ro.vowifi.softap.ee_warning = false \persist.sys.wifi.pocketmode = true \ro.wcn = enabledifeq ($(strip $(BOARD_HAVE_SPRD_WCN_COMBO)), marlin)
PRODUCT_PROPERTY_OVERRIDES += \ro.softap.whitelist = true \ro.btwifisoftap.coexist = true\persist.wifi.func.hidessid = false \ro.wifi.softap.maxstanum = 8 \ro.wifi.signal.optimized = true \ro.support.auto.roam = enabled \ro.wifip2p.coexist = trueendififeq ($(strip $(BOARD_HAVE_SPRD_WCN_COMBO)), marlin2)
PRODUCT_PROPERTY_OVERRIDES += \ro.softap.whitelist = true \ro.btwifisoftap.coexist = true\persist.wifi.func.hidessid = true\ro.wifi.softap.maxstanum = 8 \ro.wifi.signal.optimized = true \ro.support.auto.roam = disabled \ro.wifip2p.coexist = trueendififeq ($(strip $(BOARD_HAVE_SPRD_WCN_COMBO)), sharkle)
PRODUCT_PROPERTY_OVERRIDES += \ro.softap.whitelist = true \ro.btwifisoftap.coexist = true\persist.wifi.func.hidessid = true\ro.wifi.softap.maxstanum = 10 \ro.wifi.signal.optimized = true \ro.support.auto.roam = disabled \ro.wifip2p.coexist = trueendififeq ($(strip $(BOARD_HAVE_SPRD_WCN_COMBO)), rs2351)
PRODUCT_PROPERTY_OVERRIDES += \ro.softap.whitelist = false \ro.btwifisoftap.coexist = false \persist.wifi.func.hidessid = false \ro.wifi.softap.maxstanum = 8 \ro.wifi.signal.optimized = true \ro.support.auto.roam = enabled \ro.wifip2p.coexist = falseendif#copy audio policy config
ifeq ($(USE_XML_AUDIO_POLICY_CONF), 1)
PRODUCT_COPY_FILES += \$(ROOTDIR)/system/etc/audio_policy_config/audio_policy_configuration_generic.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_configuration.xml \$(ROOTDIR)/system/etc/audio_policy_config/primary_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/primary_audio_policy_configuration.xml \$(ROOTDIR)/system/etc/audio_policy_config/a2dp_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/a2dp_audio_policy_configuration.xml \$(ROOTDIR)/system/etc/audio_policy_config/usb_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/usb_audio_policy_configuration.xml \$(ROOTDIR)/system/etc/audio_policy_config/r_submix_audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/r_submix_audio_policy_configuration.xml \$(ROOTDIR)/system/etc/audio_policy_config/audio_policy_volumes.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy_volumes.xml \$(ROOTDIR)/system/etc/audio_policy_config/default_volume_tables.xml:$(TARGET_COPY_OUT_VENDOR)/etc/default_volume_tables.xml
else
PRODUCT_COPY_FILES += \$(ROOTDIR)/system/etc/audio_params/audio_policy.conf:$(TARGET_COPY_OUT_VENDOR)/etc/audio_policy.conf
endif# config sepolicy
#duplicate definition
#BOARD_SEPOLICY_DIRS += device/sprd/sharkle/common/sepolicy \
#    build/target/board/generic/sepolicySPRD_GNSS_ARCH := arm64
SPRD_GNSS_SHARKLE_PIKL2 := true
$(call inherit-product, vendor/sprd/modules/gps/GreenEye2/device-sprd-gps.mk)VOLTE_SERVICE_ENABLE := volte_only#WCN config
PRODUCT_PROPERTY_OVERRIDES += \ro.modem.wcn.enable=1 \ro.modem.wcn.diag=/dev/slog_wcn \ro.modem.wcn.id=1 \ro.modem.wcn.count=1 \ro.modem.gnss.diag=/dev/slog_gnss \persist.sys.support.vt=true \persist.sys.csvt=false \ro.wcn.gpschip=ge2 # Dual-sim config
PRODUCT_PACKAGES += \Stk1 \MsmsStkifeq ($(strip $(VOLTE_SERVICE_ENABLE)), volte_only)PRODUCT_PROPERTY_OVERRIDES += persist.sys.volte.enable=truePRODUCT_PROPERTY_OVERRIDES += persist.sys.volte.mode=Normal
endif# sprd hw module
PRODUCT_PACKAGES += \lights.$(TARGET_BOARD_PLATFORM) \sensors.$(TARGET_BOARD_PLATFORM) \tinymix \audio.primary.$(TARGET_BOARD_PLATFORM) \audio_hardware_test \camera.$(TARGET_BOARD_PLATFORM) \power.$(TARGET_BOARD_PLATFORM) \memtrack.$(TARGET_BOARD_PLATFORM) \gnss_download#SANSA|SPRD|NONE
#PRODUCT_SECURE_BOOT := NONE
PRODUCT_PACKAGES += imgheaderinsert \packimage.sh \FMRadio \ims \audio_vbc_eq \#FileExplorer \libGLES_android \gralloc.$(TARGET_BOARD_PLATFORM)#WLAN stuff
PRODUCT_PACKAGES += wpa_supplicant \wpa_supplicant.conf \wpa_supplicant_overlay.conf \wificond \wificond.rc \libwifi-hal \libwifi-system \android.hardware.wifi@1.0-service \android.hardware.wifi.supplicant@1.0 \hostapd# For HS20
PRODUCT_PACKAGES += hs20-osu-client#wifi UI configsPRODUCT_COPY_FILES += \frameworks/native/data/etc/android.hardware.wifi.xml:system/etc/permissions/android.hardware.wifi.xml \frameworks/native/data/etc/android.hardware.wifi.direct.xml:system/etc/permissions/android.hardware.wifi.direct.xml
#    frameworks/native/data/etc/android.hardware.wifi.aware.xml:system/etc/permissions/android.hardware.wifi.aware.xmlPRODUCT_PACKAGES += iwnpi \libiwnpi \sprdwl_ng.ko#disable refocus
PRODUCT_PROPERTY_OVERRIDES += persist.sys.cam.refocus.enable=false#defalut disable lock screen
PRODUCT_PROPERTY_OVERRIDES += \ro.lockscreen.disable.default=true
#Red stone sprd_stats
REDSTONE_SPRD_STATS := false#在这里配置新加入的launcher
PRODUCT_PACKAGES += xxxLauncherPRODUCT_PACKAGES += FreemeAgingTest
PRODUCT_PACKAGES += aging_video.mp4

解决完编译报错，就成功将应用编译进Android源码了

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