Rockchip平台Android应用预安装功能(基于Android13)

1. 预安装应用类型

Android上的应用预安装功能，主要是指配置产品时，根据厂商要求，将事先准备好的第三方应用预置进Android系统。预安装分为以下几种类型：

安装不可卸载应用
安装可永久卸载应用
安装卸载后恢复出厂设置后自动恢复的应用

2. 功能启用说明

2.1 配置和使用

在进行以下操作之前，首先需要输入命令 get_build_var TARGET_DEVICE_DIR 来找到对应的目标文件夹（比如 device/rockchip/rk3126c/）。

在目标文件夹下有三个文件夹，分别为：

preinstall
preinstall_del_forever
preinstall_del

请将需要预置的应用放入对应的文件夹，注意apk文件名尽量使用英文，避免空格。

顺利的话，执行make之后会在$OUT/oem目录生成对应的文件夹：

bundled_persist-app
bundled_uninstall_gone-app
bundled_uninstall_back-app

仍旧对应概述中的几种类型。在烧录后，系统会自动安装这些应用到对应目录。

注意：不支持带systemuid应用的预制，请使用Android原生方式编写mk文件。可参考vendor/rockchip/common/apps/RkDeviceTest/的集成方式。

2.2 编译结果

编译后配置文件将会输出到odm分区（$OUT/oem/），增加后请确认烧写了odm.img来使其生效。

3. 预编译脚本

预置应用编译脚本通过下面脚本完成

ifneq ($(strip $(TARGET_PRODUCT)), )
    $(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall bundled_persist-app $(TARGET_ARCH))
    $(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall_del bundled_uninstall_back-app $(TARGET_ARCH))
    $(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall_del_forever bundled_uninstall_gone-app $(TARGET_ARCH))
    -include $(TARGET_DEVICE_DIR)/preinstall/preinstall.mk
    -include $(TARGET_DEVICE_DIR)/preinstall_del/preinstall.mk
    -include $(TARGET_DEVICE_DIR)/preinstall_del_forever/preinstall.mk
endif

可以看到预置应用的Android.mk主要通过auto_generator.py完成

#!/usr/bin/env python
import sys
import os
import re
import zipfile
import shutil
import logging
import string

templet = """include $(CLEAR_VARS)
LOCAL_MODULE := %s
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_PATH := $(TARGET_OUT_ODM)/%s
LOCAL_SRC_FILES := $(LOCAL_MODULE)$(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_DEX_PREOPT := false
LOCAL_ENFORCE_USES_LIBRARIES := false
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_JNI_SHARED_LIBRARIES_ABI := %s
MY_LOCAL_PREBUILT_JNI_LIBS := %s
MY_APP_LIB_PATH := $(TARGET_OUT_ODM)/%s/$(LOCAL_MODULE)/lib/$(LOCAL_JNI_SHARED_LIBRARIES_ABI)
ifneq ($(LOCAL_JNI_SHARED_LIBRARIES_ABI), None)
$(warning MY_APP_LIB_PATH=$(MY_APP_LIB_PATH))
LOCAL_POST_INSTALL_CMD := \
    mkdir -p $(MY_APP_LIB_PATH) \
    $(foreach lib, $(MY_LOCAL_PREBUILT_JNI_LIBS), ; cp -f $(LOCAL_PATH)/$(lib) $(MY_APP_LIB_PATH)/$(notdir $(lib)))
endif
include $(BUILD_PREBUILT)

"""

copy_app_templet = """LOCAL_PATH := $(my-dir)
include $(CLEAR_VARS)
LOCAL_APK_NAME := %s
LOCAL_POST_PROCESS_COMMAND := $(shell mkdir -p $(TARGET_OUT_ODM)/%s/$(LOCAL_APK_NAME) && cp $(LOCAL_PATH)/$(LOCAL_APK_NAME).apk $(TARGET_OUT_ODM)/%s/$(LOCAL_APK_NAME)/)
"""

def main(argv):
    preinstall_dir = os.path.join(argv[1],argv[2])
    if os.path.exists(preinstall_dir):
        #Use to include modules
        isfound = 'not_found_lib'
        include_path = preinstall_dir + '/preinstall.mk'
        android_path = preinstall_dir + '/Android.mk'
        target_arch = argv[4]

        if os.path.exists(include_path):
            os.remove(include_path)
        if os.path.exists(android_path):
            os.remove(android_path)

        includefile = file(include_path, 'w')
        androidfile = file(android_path, 'w')

        androidfile.write("include $(call all-subdir-makefiles)\n\n")

        MY_LOCAL_PREBUILT_JNI_LIBS = '\\' + '\n'

        for root, dirs, files in os.walk(preinstall_dir):
            for file_name in files:
                p = re.compile(r'\S*(?=.apk\b)')
                found = p.search(file_name)
                if found:
                    include_apk_path = preinstall_dir + '/' + found.group()
                    makefile_path = include_apk_path + '/Android.mk'
                    apk = preinstall_dir + '/' + found.group() + '.apk'
                    try:
                        zfile = zipfile.ZipFile(apk,'r')
                    except:
                        if os.path.exists(include_apk_path):
                            shutil.rmtree(include_apk_path)
                        os.makedirs(include_apk_path)
                        apkpath = preinstall_dir + '/' + found.group() + '/'
                        shutil.move(apk,apkpath)
                        makefile = file(makefile_path,'w')
                        makefile.write("LOCAL_PATH := $(my-dir)\n\n")
                        makefile.write(templet % (found.group(),argv[3],'None',MY_LOCAL_PREBUILT_JNI_LIBS,argv[3]))
                        continue
                    for lib_name in zfile.namelist():
                        include_apklib_path = include_apk_path + '/lib' + '/arm'
                        if os.path.exists(include_apk_path):
                            shutil.rmtree(include_apk_path)
                        os.makedirs(include_apklib_path)
                        makefile = file(makefile_path,'w')
                        makefile.write("LOCAL_PATH := $(my-dir)\n\n")
                        apkpath = preinstall_dir + '/' + found.group() + '/'
                    if target_arch == 'arm64':
                        for lib_name in zfile.namelist():
                            lib = re.compile(r'\A(lib/arm64-v8a/)+?')
                            find_name = 'lib/arm64-v8a/'
                            if lib_name.find(find_name) == -1:
                                continue
                            libfound = lib.search(lib_name)
                            if libfound:
                                isfound = 'arm64-v8a'
                                data = zfile.read(lib_name)
                                string = lib_name.split(libfound.group())
                                libfile = include_apklib_path + '/' + string[1]
                                MY_LOCAL_PREBUILT_JNI_LIBS += '\t' + 'lib/arm64' + '/' + string[1] + '\\' + '\n'
                                if (os.path.isdir(libfile)):
                                    continue
                                else:
                                    includelib = file(libfile, 'w')
                                    includelib.write(data)
                        try:
                            if cmp(isfound, 'not_found_lib'):
                                include_apklib_path_arm64 = include_apk_path + '/lib/arm64'
                                os.rename(include_apklib_path, include_apklib_path_arm64)
                        except Exception as e:
                            logging.warning('rename dir faild for:' + e)
                    if not cmp(isfound,'not_found_lib'):
                        for lib_name in zfile.namelist():
                            lib = re.compile(r'\A(lib/armeabi-v7a/)+?')
                            find_name = 'lib/armeabi-v7a/'
                            #if not cmp(lib_name,find_name):
                            #    continue
                            if lib_name.find(find_name) == -1:
                                continue
                            libfound = lib.search(lib_name)
                            if libfound:
                                isfound = 'armeabi-v7a'
                                data = zfile.read(lib_name)
                                string = lib_name.split(libfound.group())
                                libfile = include_apklib_path + '/' + string[1]
                                MY_LOCAL_PREBUILT_JNI_LIBS += '\t' + 'lib/arm' + '/' + string[1] + '\\' + '\n'
                                if(os.path.isdir(libfile)):
                                    continue
                                else:
                                    includelib = file(libfile,'w')
                                    includelib.write(data)
                    if not cmp(isfound,'not_found_lib'):
                        for lib_name in zfile.namelist():
                            lib = re.compile(r'\A(lib/armeabi/)+?')
                            find_name = 'lib/armeabi/'
                            #if not cmp(lib_name,find_name):
                            #    continue
                            if lib_name.find(find_name) == -1:
                                continue
                            libfound = lib.search(lib_name)
                            if libfound:
                                data = zfile.read(lib_name)
                                string = lib_name.split(libfound.group())
                                libfile = include_apklib_path + '/' + string[1]
                                MY_LOCAL_PREBUILT_JNI_LIBS += '\t' + 'lib/arm' + '/' + string[1] + '\\' + '\n'
                                if(os.path.isdir(libfile)):
				        continue
				else:
                                    includelib = file(libfile,'w')
                                    includelib.write(data)
                    tmp_jni_libs = '\\' + '\n'
                    if not cmp(MY_LOCAL_PREBUILT_JNI_LIBS,tmp_jni_libs):
                        nolibpath = preinstall_dir + '/' + found.group() + '/lib'
                        shutil.rmtree(nolibpath)
                        makefile.write(templet % (found.group(),argv[3],'None',MY_LOCAL_PREBUILT_JNI_LIBS,argv[3]))
                    else:
                        if isfound == 'arm64-v8a':
                            makefile.write(templet % (found.group(),argv[3], 'arm64', MY_LOCAL_PREBUILT_JNI_LIBS,argv[3]))
                        else:
                            makefile.write(templet % (found.group(),argv[3],'arm',MY_LOCAL_PREBUILT_JNI_LIBS,argv[3]))
                    shutil.move(apk,apkpath)
                    isfound = 'not_found_lib'
                    MY_LOCAL_PREBUILT_JNI_LIBS = '\\' + '\n'
                    makefile.close()
            break
        for root, dirs,files in os.walk(preinstall_dir):
            for dir_file in dirs:
                includefile.write('PRODUCT_PACKAGES += %s\n' %dir_file)
            break
        includefile.close()

if __name__=="__main__":
  main(sys.argv)

最终生成的Android.mk脚本如下：

LOCAL_PATH := $(my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := MySysManager
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_PATH := $(TARGET_OUT_ODM)/bundled_persist-app
LOCAL_SRC_FILES := $(LOCAL_MODULE)$(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_DEX_PREOPT := false
LOCAL_ENFORCE_USES_LIBRARIES := false
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_JNI_SHARED_LIBRARIES_ABI := None
MY_LOCAL_PREBUILT_JNI_LIBS := \

MY_APP_LIB_PATH := $(TARGET_OUT_ODM)/bundled_persist-app/$(LOCAL_MODULE)/lib/$(LOCAL_JNI_SHARED_LIBRARIES_ABI)
ifneq ($(LOCAL_JNI_SHARED_LIBRARIES_ABI), None)
$(warning MY_APP_LIB_PATH=$(MY_APP_LIB_PATH))
LOCAL_POST_INSTALL_CMD :=     mkdir -p $(MY_APP_LIB_PATH)     $(foreach lib, $(MY_LOCAL_PREBUILT_JNI_LIBS), ; cp -f $(LOCAL_PATH)/$(lib) $(MY_APP_LIB_PATH)/$(notdir $(lib)))
endif
include $(BUILD_PREBUILT)

PackageManagerService对预安装应用的处理

//PackageManagerService.java
 public static final String BUNDLED_PERSIST_DIR = "/odm/bundled_persist-app";

    public static final String BUNDLED_UNINSTALL_GONE_DIR = "/odm/bundled_uninstall_gone-app";

//Environment.java
private static final File DIR_PREBUNDLED_UNINSTALL_BACK_ROOT = getDirectory(
            ENV_PREBUNDLED_UNINSTALL_BACK_ROOT, "/odm/bundled_uninstall_back-app");
    private static final File DIR_PREBUNDLED_UNINSTALL_GONE_ROOT = getDirectory(
            ENV_PREBUNDLED_UNINSTALL_GONE_ROOT, "/odm/bundled_uninstall_gone-app");

//InitAppsHelper.java
 public void preinstallThirdPartyAPK(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){
    
    
        preinstallPrebundledpersist(packageParser,executorService,scanFlags);
        preinstallPrebundledUninstallBack(packageParser,executorService,scanFlags);
        preinstallPrebundledUninstallGone(packageParser,executorService,scanFlags);
    }

    private void preinstallPrebundledpersist(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){
    
    
        scanDirTracedLI(new File(mPm.BUNDLED_PERSIST_DIR),null,
                    mPm.getDefParseFlags() | ParsingPackageUtils.PARSE_IS_SYSTEM_DIR
                    | ParsingPackageUtils.PARSE_IS_PREINSTALL,
                    scanFlags | mPm.SCAN_AS_PREINSTALL
                    | SCAN_AS_SYSTEM,
                    packageParser, executorService);
    }

    private void preinstallPrebundledUninstallBack(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){
    
    
        scanDirTracedLI(Environment.getPrebundledUninstallBackDirectory(),null,
                    mPm.getDefParseFlags() | ParsingPackageUtils.PARSE_IS_PREBUNDLED_DIR,
                    scanFlags | mPm.SCAN_AS_PREBUNDLED_DIR,
                    packageParser, executorService);
    }

    private void preinstallPrebundledUninstallGone(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){
    
    
        scanDirTracedLI(Environment.getPrebundledUninstallGoneDirectory(),null,
                    mPm.getDefParseFlags() | ParsingPackageUtils.PARSE_IS_PREBUNDLED_DIR,
                    scanFlags | mPm.SCAN_AS_PREBUNDLED_DIR,
                    packageParser, executorService);
    }

需要进一步了解预安装应用相关流程，请查看preinstallPrebundled相关代码流程。