How to make android build fast whenever there is a change in framework

Question

I am doing some changes in frameworks/base/, so i just wanted to know whether there is a faster process of building it. Currently what i follow is very slow i.e. I do

$ make -j4 installclean // which cleans *.img files from the /out folder
$ make -j4

and finally it creates all *.img. So apart from the above process, is there a way for a single line of change can be built fast ?

Answer 1

You can use mm

Go to frameworks/base/ ; do your changes; then do mm 

This will build only the frameworks.jar similarly you can do for other projects as well

Comments

So after doing mm, does the change gets updated when my emulator is running or do I have to restart the emulator again ?

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You have to restart the emulator