What is the wrong in my code

import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;

public class MainActivity extends ListActivity {
public SwipeRefreshLayout mRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.refreshLayout) 
 mRefreshLayout.setOnRefreshListener(OnRefreshListener);
     /* Some code has been omitted for brevity
     */

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }



public OnRefreshListener mOnRefreshListener = new OnRefreshListener() {
        @Override
        public void onRefresh() {
            // Code that refreshes the content in the layout...
        }
    }; 
}