I Have coded an app finds nearby places. now i want to test it on a real phone but Google map does not load and app not working. my question is I've made sha1 key and put in android key in API console. do i have to do the same for browser key?
No there is no need for Browser key in Android app.
Make sure your Package name matches your SHA-1 Certificate fingerprint in the Developer Console under API & auth -> Credentials-> Android API Key