Android How can app run as System App?

Question

What is required for an app to run as a System app? What needs to be requested from the device vendor? Does the process change if the device is rooted and the app is to ca

Answer 1

java -jar signapk.jar platform.x509.pem platform.pk8 bin/TestApp-unsigned.apk bin/TestApp.apk

Answer 2

System permissions such as access to PowerManager need the application to be signed with the platform key besides giving android.permission.POWERMANAGER or a similar permission in the manifest.

As far as signing with the platform key is concerned, we can do that by building the entire firmware with the application included.

Answer 3

You have to sign your application with system key , see this thread How to compile Android Application with system permissions