1. Android build
  - Download original android source code ( android-11.0.0_r28 ) from http://source.android.com   
  ( $repo init -u https://android.googlesource.com/platform/manifest -b android-11.0.0_r28
    $repo sync -cdq -j12 --no-tags
    $repo start android-11.0.0_r28 --all 
  )
  - And, merge the source into the android source code
  
  - Run following scripts to build android
    a) source build/envsetup.sh
    b) lunch 1
    c) make -j4
  - When you compile the android source code, you have to add google original prebuilt source(toolchain) into the android directory.
  - After build, you can find output at out/target/product/generic

2. Kernel Build  

  - Uncompress using following command at the android directory
    a) tar -xvzf *_Kernel_R.tar.gz 
	
  - When you compile the kernel source code, you have to add google original "prebuilt" source(toolchain) into the android directory.
  - Run following scripts to build kernel
    a) cd kernel/msm-4.14
    b) export CROSS_COMPILE=../../../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
    c) export CLANG_TRIPLE=aarch64-linux-gnu-
    d) make O=./out ARCH=arm64 vendor/mh2lm-perf_defconfig
	e) make O=./out ARCH=arm64 REAL_CC=../../../prebuilts/clang/host/linux-x86/clang-r353983c/bin/clang -j24

* "-j24" : The number, 24, is the number of multiple jobs to be invoked simultaneously. 

- After build, you can find the build image(Image.gz) at kernel/msm-4.14/out/arch/arm64/boot


3. to obtain the open data about KnowMeABBA*.apk App  

 If you want to obtain the open data ( source ) for "KnowMeABBA or *ABBA.apk " application, 
 the open data may be obtained at http://opensource.lge.com. 
 LGE will also provide open data ( code ) to you . 
 
 You can search the keyword with "KnowMeABBA" at the search window in http://opensource.lge.com.  

 You can find it in "Software List" at that website. 

