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Android Build a Simple Android App (2014) Creating the Screen Layout Adding a Button

Posted by RAJ PATEL
RAJ PATEL
4,282 Points

What does it mean when you say use id in the system?

android:id="@+id/button" Whats the id in the code for?

2 Answers

Daniel Čupak
Daniel Čupak
6,602 Points
Daniel Čupak
Daniel Čupak
6,602 Points

Hi Raj,

it basically means "id of a button is button"

you need to reference your button to use it in the code later - something unique so the java knows that that is the thing you want to use

id should be more specific e.g. "big_Next_button"

Eran Mani
Eran Mani
3,751 Points
Eran Mani
Eran Mani
3,751 Points

Hey raj,

as for button, with the ID you can connect to the button View and use the onClickListener to perform an action with it. name is very importent, espically when you have multiple buttons. for example:

Button sendData= (Button) findViewById(R.id.btnSend); its common to use "btn" as a part of the button ID.