Where is main() in Android?

Question

I am new to Android, and was studying the framework and it compelled me to ask this question. Since we are extending Activity in Android, there has to be main s

Answer 1

Read this blog entry to understand how an Android application starts:

During startup of the Android system the Linux kernel first calls the process "init". init reads the files "/init.rc" and "init.device.rc". "init.device.rc" is device specific, on the virtual device this file is called "init.goldfish.rc".

init.rc starts the process "Zygote" via the program "/system/bin/app_process". Zygote loads the core Java classes and performs initial processing of them. These classes can be reused by Android application and therefore this step makes them faster to start. Once the initial work of Zygote is done, the process listens to a socket and waits for requests.

If you look in the ZygoteInit class, you'll find the main method.

As others have mentioned, this main() method is involved in setting up the Android app environment. As far as a developer is concerned, the starting point is the onCreate() method of the Launcher activity.