As a self-taught android programmer, how do u know when you are ready to look for a job as an android developer?

Can you make an app start to finish? Do you follow coding standards? Then I'd say yes

@ScribeOfGoD based on the legacy code I worked on, the questions​ I'd be asking are: can you copy answers from stack overflow, can you hard code positions for everything, can you name things two letters, and can you also use third party libraries without attaching the license? Then you're ready...to seriously annoy people.

In all seriousness though, most people want someone that has finished apps and have them on the app store (at least the jobs I've seen) and like scribe said using proper coding standards then you should be good to go.