/ system / app中的Android应用程序可以在无根设备上写入/ system吗？

Question

I'm developing an app that will be included in the ROM of a phone vendor's new product. So this is the situation I'm facing:

• my app resides in /system/app;
• but the device is NOT rooted.

My question is, can my app somehow write into the /system folder? I know the system partition is usually read-only. Is it possible for my app to remount the system partition as read-write, write into it, and turn it back to read-only?

Answer 1

This guy managed to achieve it by using su permissions. I presume you will be developing an an app with signatureOrSystem permissions, I believe the permissions are similar to root but not 100%. It is hard to find out what exactly you can and can't do with signatureOrSystem permissions so I think this will be a trial and error exercise for you. My guess is that it will work with a remount.