Android User application as System Application or as a prebuilt application

In many scenario's with the customized android ROM's, we want some of the android applications to be a part of the android image. i.e we want the apk's as a prebuilt apk.

Follow these instructions, to prepare an apk as a prebuilt apk.

Adding a prebuilt APK (Android.mk)

  LOCAL_PATH := $(call my-dir)

  include $(CLEAR_VARS)
   
  # Module name should match apk name to be installed.
  LOCAL_MODULE := LocalModuleName
  LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
  LOCAL_MODULE_CLASS := APPS
  LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
   
  include $(BUILD_PREBUILT)

How to know My Android Application/Process killed due to low Memory?

Prerequisites :
   1) ICS(Ice cream sandwich) AOSP code - 4.0.3

These are the pointers to verify in native source code for the "low-memory" condition.

1) Detect "Out of Memory on" situation in the below functions

    Function Names : dvmMalloc() calls
                                 tryMalloc ()
    File Name          : Heap.cpp
    Path                   : /dalvik/vm/alloc

2) ActivityManager kill the process.

    Function Name   : requestFinishActivityLocked
    File Name           : ActivityStack.java
    Path                    : /frameworks/base/services/java/com/android/server/am

3) Report process is died.

    Function Name   : appDiedLocked
    File Name           : ActivityManagerService.java
    Path                    : frameworks/base/services/java/com/android/server/am/

Enable the Native logs in above functions, and from this you can confirm that the application is getting killed because of low memory.

Check this link to know "How to enable native logs".

Note :  execute '/proc/meminfo' to know the current status of memory consumed, memory free etc..