Creating a FB App using java on android

I'd need some help on this topic, so basically i've been reading a lot on the internet and have downloaded the sample from https://github.com/facebook/facebook-android-sdk/ which when used their sample, it works but then after fiddling it for the pass few days, i'm lost again.

1. so basically, what i开发者_开发问答 need is to register my app on fb then;
2. design the app and create it on android;

then comes the question, do i need still need the canvas on fb which will use php as well or is that a totally different thing?

my idea is to actually use the app that will retrieve or update my group's wall straight from the app. so basically what should i do, been lost but I'm willing to learn! just need someone to guide me :(

so basically, what i need is to register my app on fb then;

Look at Facebook Authentication Documentation, it clearly states:

Register your application to get an app ID and secret. Your Facebook app ID is your client_id and your Facebook application secret is your client_secret.

The client_id and client_secret Facebook is referring about, is for your application to use OAuth 2 authorization protocol.

design the app and create it on android;

You will have to follow the registration requirements (e.g. application name, logo, url to default homepage, etc.) and use the Facebook Android SDK to integrate your application to Facebook.

In essence, you must register your application.