Question

Hi I am new to android programming.
Here my problem is…
I designed 2 layouts.

1) R.layout.main: it consists one TextField,one EditText and one Button

2) R.layout.window: it holds 5 buttons

here at first,R.layout.main is displayed.By default R.layout.main is calling so when i press the button of that main layout it needs to forward to r.layout.window.
Forwarding process is ok..

BUT WHEN I MAKE CALL LIKE
BUTTON button=(Button)findViewById(R.id.b1);// b1 is at R.layout.window

i am getting an exception.. SO CAN I KNOW WHICH METHOD WILL BE CALLED WHEN setContentView() IS CALLED and FROM ONCREATE(),IS IT POSSIBLE TO CALL MULTIPLE LAYOUTS R.id.namess..

waiting for reply

Answer 1

public class UI extends Activity {
    LayoutInflater factory 
    View layout1;
    View layout2;    
public void onCreate(Bundle bundle){
 .....
 .....

 factory =getLayoutInflater();
 layout1 =  factory.inflate(R.layout.main, null);
 layout2 =  factory.inflate(R.layout.window, null);
.....
..... 
   }
}



//access R.id.b1 in R.layout.window;

try this

Button button=(Button)layout2.findViewById(R.id.b1);

if you set the content view to R.layout.main like this setContentView(R.layout.main); then
you can access widgets in the R.layout.main by findViewById() only like this

Button b = (Button)findViewById(R.id.button1);

where R.id.button1 inside R.layout.main then when you finish with R.layout.main set the content view of window layout and then access the widgets inside it

setContentView(R.layout.window);

//now you can access elements in window layout using findViewById
Button b2  =(Button)findViewById(R.id.button2); 

hope you understand