添加系统级res资源包

//

刚做完自定义res资源包的配置，这里做一下关于在配置过程中出现的问题和解决方法作一下记录。

资源的引用格式为：

@包名：资源类型/资源名

以framework资源为例：

@android:style/Theme.Holo.Light

这次需要配置与framework同级的资源包，以包名为"custemer"为例,配置完成后资源引用：

@custemer:style/Theme.Holo.Light

一、新建自定义资源包

在framework/base/core/下新建名为“res_custemer”文件夹,结构如下：
编写Android.mk/Android.bp文件

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)# include apicheck.mk later, we need the build pass to prepare the first version
# include $(LOCAL_PATH)/apicheck.mk
LOCAL_PACKAGE_NAME := custemer-res
LOCAL_CERTIFICATE := platform
LOCAL_AAPT_FLAGS := -x3# Tell aapt to build resource in utf16(the ROM will be enlarged),
# in order to save RAM size for string cache table
ifeq (yes,strip$(MTK_GMO_RAM_OPTIMIZE))
LOCAL_AAPT_FLAGS += --utf16
endifLOCAL_NO_CUSTEMERRES := true
LOCAL_MODULE_TAGS := optional
# Install this alongside the libraries.
LOCAL_MODULE_PATH := $(TARGET_OUT_JAVA_LIBRARIES)
# Create package-export.apk, which other packages can use to get
# PRODUCT-agnostic resource data like IDs and type definitions.
LOCAL_EXPORT_PACKAGE_RESOURCES := true
include $(BUILD_PACKAGE)# define a global intermediate target that other module may depend on.
.PHONY: gome-res-package-target
gome-res-package-target: $(LOCAL_BUILT_MODULE)

"LOCAL_AAPT_FLAGS := -x3 " value 的定义需要与 "frameworks\base\libs\androidfw\ResourceTypes.cpp"中所定义的resource ID 一致

//
// Copyright (C) 2008 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.
//android_app {name: "xxx-res", certificate: "platform",platform_apis: true,// Soong special-cases framework-res to install this alongside// the libraries at /system/framework/framework-res.apk.// Generate private symbols into the com.android.internal.R class// so they are not accessible to 3rd party apps.aaptflags: [// Framework doesn't need versioning since it IS the platform."--no-auto-version",// Allow overlay to add resource"--auto-add-overlay",// Add for xxx"--package-id 0x0a","--private-symbols","com.xxx.internal",],owner: "xxx",// Create package-export.apk, which other packages can use to get// PRODUCT-agnostic resource data like IDs and type definitions.export_package_resources: true,defaults: ["getxxxResManifest"],
}bootstrap_go_package {name: "soong-getxxxResManifest",pkgPath: "android/soong/getxxxResManifest",deps: ["blueprint","blueprint-pathtools","soong","soong-android","soong-cc","soong-genrule","soong-apex",],srcs: ["getxxxResManifest.go",],pluginFor: ["soong_build"],
}getSunmiResManifest {name: "getxxxResManifest",
}

编写AndroidManifest.xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="custemer" coreApp="true" android:sharedUserId="android.uid.system"android:sharedUserLabel="@null"><eat-comment /><protected-broadcast android:name="android.intent.action.SCREEN_OFF" /><permission android:name="android.permission.ADVANCED_WIDGET_API"android:protectionLevel="normal" /><application android:process="system"android:persistent="true"android:hasCode="false"android:label="@null"android:allowClearUserData="false"android:killAfterRestore="false"android:icon="@null"></application></manifest>

"custemer" 为资源包名

二、添加编译依赖关系


framework_custemer_res_package_export :=
framework_custemer_res_package_export_deps :=ifneq ($(LOCAL_PACKAGE_NAME), mediatek-res)framework_custemer_res_package_export += \$(call intermediates-dir-for,APPS,mediatek-res,,COMMON)/package-export.apkframework_custemer_res_package_export_deps += \$(call intermediates-dir-for,APPS,mediatek-res,,COMMON)/src/R.stampifneq ($(LOCAL_PACKAGE_NAME),custemer-res)framework_custemer_res_package_export += \$(call intermediates-dir-for,APPS,gome-res,,COMMON)/package-export.apkframework_custemer_res_package_export_deps += \$(call intermediates-dir-for,APPS,gome-res,,COMMON)/src/R.stampendif
endif# FIXME: Cannot set in Android.mk due to base_rules.mk#ifneq ($(LOCAL_PACKAGE_NAME),mediatek-res)#   LOCAL_RES_LIBRARIES += mediatek-res#endif
....
$(filter-out $(framework_gome_res_package_export),$(resource_export_package)): $(framework_custemer_res_package_export_deps )
$(R_file_stamp): $(framework_custemer_res_package_export_deps )$(resource_export_package) $(R_file_stamp) $(LOCAL_BUILT_MODULE): $(all_library_res_package_export_deps)
$(LOCAL_INTERMEDIATE_TARGETS): \PRIVATE_AAPT_INCLUDES := $(all_library_res_package_exports) $(framework_custemer_res_package_export )

将 mediatek-res与自定义资源模块名定义在一起，否则编译时会出现circle dependence的错误；
将 framework_gome_res_package_export 添加进 PRIVATE_AAPT_INCLUDES 中，否则应用运行会报找不到资源的错误。

三、将资源路径添加进framework编译

路径： frameworks/base/Android.mk

framework_res_source_path := APPS/framework-res_intermediates/src
# M:add mediatek resource path
mediatek-res-source-path := APPS/mediatek-res_intermediates/src
gome_custemer_source_path := APPS/custemer-res_intermediates/src
...
LOCAL_INTERMEDIATE_SOURCES := \$(framework_res_source_path)/android/R.java \$(framework_res_source_path)/android/Manifest.java \$(framework_res_source_path)/com/android/internal/R.java
# M:add mediatek resource R.java into framework,@{
LOCAL_INTERMEDIATE_SOURCES += \$(mediatek-res-source-path)/com/mediatek/internal/R.java \$(mediatek-res-source-path)/com/mediatek/R.java \$(mediatek-res-source-path)/com/mediatek/Manifest.java
# @}# M:add custemer resource R.java into framework,@{
LOCAL_INTERMEDIATE_SOURCES += \$(custemer_res_source_path)/com/gome/internal/R.java \$(custemer_res_source_path)/com/gome/R.java \$(custemer_res_source_path)/com/gome/Manifest.java
# @}LOCAL_MODULE := framework# Make sure that R.java and Manifest.java are built before we build
# the source for this library.
framework_res_R_stamp := \$(call intermediates-dir-for,APPS,framework-res,,COMMON)/src/R.stamp
$(full_classes_compiled_jar): $(framework_res_R_stamp)
$(built_dex_intermediate): $(framework_res_R_stamp)
# M:add mediatek resource dependes framework->mediatek_res->framework_res,@{
mediatek_res_R_stamp := \$(call intermediates-dir-for,APPS,mediatek-res,,COMMON)/src/R.stamp
$(full_classes_compiled_jar): $(mediatek_res_R_stamp)
$(built_dex_intermediate): $(mediatek_res_R_stamp)
custemer_res_R_stamp := \$(call intermediates-dir-for,APPS,custemer-res,,COMMON)/src/R.stamp
$(full_classes_compiled_jar): $(custemer_res_R_stamp)
$(built_dex_intermediate): $(custemer_res_R_stamp)
# @}

四、修改 PackageManagerService

路径：frameworks\base\services\core\java\com\android\server\pm\PackageManagerService.java

   ApplicationInfo mAndroidApplication;/// M: [CIP] Add application info for mediatek-res.apkApplicationInfo mMediatekApplication;ApplicationInfo mCustemerApplication;private PackageParser.Package scanPackageDirtyLI(PackageParser.Package pkg,final int policyFlags, final int scanFlags, long currentTime, UserHandle user)throws PackageManagerException {    /** M: [CIP] skip duplicated mediatek-res.apk @{ *//// This will replace original resources with CIP resourcesif (pkg.packageName.equals("com.mediatek")) {synchronized (mPackages) {if (mMediatekApplication != null) {Slog.w(TAG, "*************************************************");Slog.w(TAG, "Core mediatek package being redefined.  Skipping.");Slog.w(TAG, " file=" + scanFile);Slog.w(TAG, "*************************************************");throw new PackageManagerException(INSTALL_FAILED_DUPLICATE_PACKAGE,"Core android package being redefined.  Skipping.");}mMediatekApplication = pkg.applicationInfo;}}/** @} */if (pkg.packageName.equals("custemer")) {synchronized (mPackages) {if (mCustemerApplication != null) {Slog.w(TAG, "*************************************************");Slog.w(TAG, "Core gome package being redefined.  Skipping.");Slog.w(TAG, " file=" + scanFile);Slog.w(TAG, "*************************************************");throw new PackageManagerException(INSTALL_FAILED_DUPLICATE_PACKAGE,"Core android package being redefined.  Skipping.");}mCustemerApplication = pkg.applicationInfo;}}}

五、预置自定义资源包

目录：device/mediatek/common/device.mk

# for mediatek-res
PRODUCT_PACKAGES += mediatek-res# for custemer-res
PRODUCT_PACKAGES += custemer-res

六、修改资源管理器 Assetmanager.cpp

目录：framework/base/libs/androidfw/AssetManager.cpp

///M:add the resource path
static const char* kMediatekAssets = "/vendor/framework/mediatek-res/mediatek-res.apk";
///M:add the resource path
static const char* kCustemerAssets = "framework/custemer-res/custemer-res.apk";bool AssetManager::addDefaultAssets()
{const char* root = getenv("ANDROID_ROOT");LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_ROOT not set");...if((fp= fopen(pathCip,"w+"))!= NULL) {.....return isOK1;} else {//ALOGD("AssetManager-->addDefaultAssets CIP path not exsit!");String8 path(root);path.appendPath(kSystemAssets);///M:add the new resource path into default path,so all the app can reference,@{bool isOK1 = addAssetPath(path, NULL, false /* appAsLib */, true /* isSystemAsset */);String8 path2(kMediatekAssets);bool isOK2 = addAssetPath(path2, NULL, false, false);String8 path3(root);path3.appendPath(kCustemerAssets);bool isOK3 =addAssetPath(path3, NULL, false, false);if(!isOK3){ALOGW("AssetManager-->addDefaultAssets isok3 is false");}else{ALOGW("AssetManager-->addDefaultAssets isok3 is true");}

将自定义资源apk添加进系统资源管理器，当应用使用自定义资源id查找资源时，会通过AssetManager来查找。如果这里写错会导致会先各种问题。以字符串为例，当应用通过R.strings.xxx来查找字符串时，由于AssetManager无法返回正确的资源，默认会返回资源的id值。

六、修改 ResourceTypes.cpp，添加对应的package id

#define APP_PACKAGE_ID      0x7f
#define SYS_MTK_PACKAGE_ID  0x08 /// M: 0x08 is mediatek-res.apk resource ID
#define SYS_CUSTEMER_PACKAGE_ID  0x03 // 0x03 is gome-res.apk resource ID
#define SYS_PACKAGE_ID      0x01bool ResTable::stringToValue(Res_value* outValue, String16* outString,const char16_t* s, size_t len,bool preserveSpaces, bool coerceType,uint32_t attrID,const String16* defType,const String16* defPackage,Accessor* accessor,void* accessorCookie,uint32_t attrType,bool enforcePrivate) const
{if (*s == '@') {....} else {if (rid != 0) {uint32_t packageId = Res_GETPACKAGE(rid) + 1;if (packageId != APP_PACKAGE_ID && packageId != SYS_PACKAGE_ID && packageId != SYS_MTK_PACKAGE_ID && packageId != SYS_CUSTEMER_PACKAGE_ID) {outValue->dataType = Res_value::TYPE_DYNAMIC_REFERENCE;}outValue->data = rid;return true;}if (accessor) {uint32_t rid = accessor->getCustomResourceWithCreation(package, type, name,createIfNotFound);if (rid != 0) {if (kDebugTableNoisy) {ALOGI("Pckg %s:%s/%s: 0x%08x\n",String8(package).string(), String8(type).string(),String8(name).string(), rid);}uint32_t packageId = Res_GETPACKAGE(rid) + 1;if (packageId == 0x00) {outValue->data = rid;outValue->dataType = Res_value::TYPE_DYNAMIC_REFERENCE;return true;} else if (packageId == APP_PACKAGE_ID || packageId == SYS_PACKAGE_ID || packageId == SYS_MTK_PACKAGE_ID || packageId == SYS_CUSTEMER_PACKAGE_ID) {// We accept packageId's generated as 0x01 in order to support// building the android system resourcesoutValue->data = rid;return true;}}}}DynamicRefTable::DynamicRefTable(uint8_t packageId, bool appAsLib): mAssignedPackageId(packageId), mAppAsLib(appAsLib)
{memset(mLookupTable, 0, sizeof(mLookupTable));// Reserved package idsmLookupTable[APP_PACKAGE_ID] = APP_PACKAGE_ID;mLookupTable[SYS_PACKAGE_ID] = SYS_PACKAGE_ID;mLookupTable[SYS_MTK_PACKAGE_ID] = SYS_MTK_PACKAGE_ID;mLookupTable[SYS_CUSTEMER_PACKAGE_ID] = SYS_CUSTEMER_PACKAGE_ID;
}}

SYS_CUSTEMER_PACKAGE_ID 需要对应与自定义模块mk文件的 LOCAL_AAPT_FLAGS

七、将资源apk路径添加进白名单

路径：frameworks/base/core/jni

static const char* kPathWhitelist[] = {"/dev/null","/dev/socket/zygote","/dev/socket/zygote_secondary","/system/etc/event-log-tags","/sys/kernel/debug/tracing/trace_marker","/system/framework/framework-res.apk","/dev/urandom","/dev/ion","/dev/dri/renderD129", // Fixes b/31172436"/proc/ged", // MTK add"/system/vendor/framework/mediatek-res/mediatek-res.apk", // MTK add"/system/framework/custemer-res/custemer-res.apk" /* XXX add */
};

修改的目的是为了通过开机的检查，否则无法开机。

关于如何使用，就不作记录了。