Signing my android application as system app

Question

In my company, we would want total control for battery consumption in the field, using only 2g and gps could drain the battery awfully fast. What we decided is that we need to have root access to the mobile phone, So that when phone is idle, we would turn off those needless battery consumption. And also we would not allow users to uninstall it and clear data to it.

My Question is :

1. Where do I get these signature key?
2. Is it going to like a root access If ever I successfully managed to sign it?
3. What is the difference between Root vs Signed with key?

Answer 1

Well below is your answer,

1. You can find platform keys from HERE. The command to sign apk (for linux) is:

   java -jar signapk.jar -w platform.x509.pem platform.pk8 APPLICATION.apk APPLICATION_sign.apk

   onward Android 10 lib64 library path need to provided which can be found at android/out/host/linux-x86 after generating a successful build, one can copy folder or simply provide its path to generate sign APK

   java -Djava.library.path="<path to lib64>" -jar signapk.jar -w platform.x509.pem platform.pk8

2. If you sign your apk with platform keys you won't required root access you can simply install it from "adb install" command, and yes in someway it is like root 'cos it can access all internal api but keep in mind if your app is system signed then you can't write external storage.

3. First of all don't combine both root is user where system app is application type which distinguish from normal application below link might clear your confusion regarding it.

   what-is-the-difference-between-android-user-app-with-root-access-and-a-system-ap