Android :: Adding Textviews And Radio Button In Code

I was wondering how we could add objects such as textview and radio buttons to the activity through code and not the XML file and still have it run correctly. I tried adding a simple textview below but I got an error when I tried to run. Can any1 tell me how I could add the textview in correctly? import java.util.ArrayList; import android.app.Activity; import android.os.Bundle; import android.widget.ScrollView; import android.widget.TextView;public class Q_end extends Activity { /** Called when the activity is first created. */ private ArrayList<String> qs = new ArrayList<String>(10); private ArrayList<String[]> as = new ArrayList<String[]>(10); @Override public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); setContentView(R.layout.end_app); ScrollView we = (ScrollView) findViewById(R.id.viewer); String[] temp = new String[4]; temp[0] = "the"; temp[1] = "the1"; temp[2] = "the2"; temp[3] = "the3"; as.add(temp); String temp2 = "the rocks says"; qs.add(temp2); qs.add("the question is"); String[] temp3 = new String[1]; temp3[0] = " "; as.add(temp3); TextView gg = new TextView(null); gg.setText(qs.get(0)) we.addView(gg);