Apps help please

[sarasaad]

Hey guys,
I totally new for android programming I just wanna know what the whole functions means cause I saw many codes and I understand most of the code but the functions I don't get it just like : setGravity, contentEquals, Intent, putExtra etc.
so can anyone help me please
thanks in advance

 

[jonbonazza]

This might help: http://en.wikipedia.org/wiki/Method_(computer_programming)

 

[StevenHu]

Think of a function as a mini-program that works when it is triggered to start. For instance, you can have a function that tells the app to return to the previous page. But it doesn't actually take place until the user touches a Back button.

This is a function called goBack(), which tells the app to go back to the previous page:

function goBack()
{
window.history.back();
}

On a page, this Back button is all set to call, or execute, the goBack() function:

<input type='button' value='Back' onclick='goBack()'>

Hope this little example helps you understand functions.