I can't set main Class variable in onCreate Method

Posted by natrollus on Stack Overflow See other posts from Stack Overflow or by natrollus
Published on 2012-10-14T15:22:36Z Indexed on 2012/10/14 15:37 UTC
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Main class has two variables that want to reach another class:

public class MyClassA extends Activity {
int i = 1;
Button b1; 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.i = 31;
        this.b1 = (Button) findViewById(R.id.btn1);
        ~~
    }
 }

Second class want to call variables in mainClass object:

public class MyclassB implements OnClickListener{
     MyClassA mainClass = new MyClassA();
     Button btn = mainClass.b1;
     int n = mainClass.i;
     public void OnClick(View arg0){
         Log.v("btn:",btn);
         Log.v("int:",n);
     }

     //btn returns null;
     //int returns 1;

But onCreate method not set variables..

Why not set main class variables like this.i=31 ?

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