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：
image.png
- 编写Android.mk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
endif
LOCAL_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: $(LOCAL_BUILT_MODULE)
"LOCAL_AAPT_FLAGS := -x3 " value 的定义需要与 "frameworks\base\libs\androidfw\ResourceTypes.cpp"中 所定义的resource ID 一致
- 编写AndroidManifest.xml文件
"custemer" 为资源包名
二、添加编译依赖关系
framework_custemer_res_package_export :=
framework_custemer_res_package_export_deps :=
ifneq ($(LOCAL_PACKAGE_NAME), mediatek-res)
framework_custemer_res_package_export += \
$(call intermediates-dir-for,APPS,mediatek-res,,COMMON)/package-export.apk
framework_custemer_res_package_export_deps += \
$(call intermediates-dir-for,APPS,mediatek-res,,COMMON)/src/R.stamp
ifneq ($(LOCAL_PACKAGE_NAME),custemer-res)
framework_custemer_res_package_export += \
$(call intermediates-dir-for,APPS,gome-res,,COMMON)/package-export.apk
framework_custemer_res_package_export_deps += \
$(call intermediates-dir-for,APPS,gome-res,,COMMON)/src/R.stamp
endif
endif
# FIXME: Cannot set in Android.mk due to base_rules.mk
#ifneq ($(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.apk
ApplicationInfo 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 resources
if (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 0x01
bool 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 resources
outValue->data = rid;
return true;
}
}
}
}
DynamicRefTable::DynamicRefTable(uint8_t packageId, bool appAsLib)
: mAssignedPackageId(packageId)
, mAppAsLib(appAsLib)
{
memset(mLookupTable, 0, sizeof(mLookupTable));
// Reserved package ids
mLookupTable[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。