Android/Building/SystemAPPs

System APPs

Android system APPs are these APPs which are installed in system partition. Since system partition is read only at runtime, thus the system APPs are not remove-able for general user.

Add/Remove

In general, there are two ways to add/remove system applications.

At build time

System application configurations for android build system are located under source code folder vendor/olpc/xo4/apps/ To add an application in system partition simply do:

• Copy pre-built APK file to vendor/olpx/xo4/apps/

cp YourAPKName.apk vendor/olpc/xo4/apps/

• Add build description in Android.mk under vendor/olpx/xo4/apps

include $(CLEAR_VARS)
LOCAL_MODULE := YourAPKName
LOCAL_MODULE_OWNER := xxxx
LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_TAGS := optional
LOCAL_CERTIFICATE := platform
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
include $(BUILD_PREBUILT)

Note: If need to resign application put PRESIGNED instead of platform

• Add module name in apps.mk under vendor/olpx/xo4/apps

PRODUCT_PACKAGES += \
   ....... \
   ....... \
   YourAPKName

At runtime

This relies on Android OTA update system which allow the system reboots into recovery mode then mount system partition as RW for applying system partition changes.
XO-4 does NOT support runtime system partition update since recovery mode haven't been implemented.