How make a app to a flash rom ?

[Guest kapasiki]

Hello ,guys how are you

here i want to learn from experience rom makers ,that i want put some small and useful applications and tools to move into the ROM ,i move tp System/app .or Date/app ,.but when i rebuild the new rom ,and signed it and then flash it into my device , there was no my putting application worked after i flash it and reboot into system ,only the system app worked !

I do not know why , can anyone tell me how to integration apps and tools into the rom will be flashed , your reply will be highly appreciate !

thanks for anyone ,reply me and teach me !

[Guest Swimmerboy]

Hello ,guys how are you

here i want to learn from experience rom makers ,that i want put some small and useful applications and tools to move into the ROM ,i move tp System/app .or Date/app ,.but when i rebuild the new rom ,and signed it and then flash it into my device , there was no my putting application worked after i flash it and reboot into system ,only the system app worked !

I do not know why , can anyone tell me how to integration apps and tools into the rom will be flashed , your reply will be highly appreciate !

thanks for anyone ,reply me and teach me !

Opening the .zip file of the ROM you want to customise, navigating to /system/app and pasting the .apk file in there will do it. I've been using this method for years to have my own apps installed from first boot.