怎样在android平台中签名需要系统权限的apk

有的app在AndroidManifest.xml需要权限，需要系统权限
android:sharedUserId=”android.uid.system”

直接安装会不成功，需要签名才能使用

Failure [INSTALL_FAILED_SHARED_USER_INCOMPATIBLE: Package couldn't be installed in /data/app/com.roobo.recordtools-N-6sir_6vJeeUjoLtErGaQ==: Package com.roobo.recordtools has no signatures that match those in shared user android.uid.system; ignoring!]

采用rom编写Android.mk的方式获取签名：

# LOCAL_PATH:= $(call my-dir)

# include $(CLEAR_VARS)
# LOCAL_MODULE := KehwinBLE
# LOCAL_MODULE_TAGS := optional
# LOCAL_PRIVILEGED_MODULE := true
# LOCAL_SRC_FILES := ./KehwinBLE.apk
# LOCAL_MODULE_CLASS := APPS
# LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
# LOCAL_CERTIFICATE := platform
# include $(BUILD_PREBUILT)

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := app-release
LOCAL_SRC_FILES := app-release.apk
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_SUFFIX := .apk
LOCAL_BUILT_MODULE_STEM := package.apk
LOCAL_CERTIFICATE := platform

include $(BUILD_PREBUILT)

编译
mmm packages/apps/Roobo/
生成：
[100% 2/2] Install: out/target/product/msm8909/system/app/app-release/app-release.apk

这样就可以安装 成功了