我是 Android 编程新手。我用 Java 制作了所有按钮，而不是使用 XML。现在我如何滚动我的按钮？这是我的代码：
public class GameZone extends Activity implements View.OnClickListener {
private static final ColorStateList RED = null;
LinearLayout rl;
Button but1, but2, but3, but4, but5, but6, but7, but8, but9, but10, but11, but12;
Button but13, but14, but15;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
rl = new LinearLayout (this);
rl.setOrientation(LinearLayout.VERTICAL);
but1 = new Button (this);
but1.setText("bu 1");
but1.setTextSize(30);
but2 = new Button (this);
but2.setText("bu 2");
but2.setTextSize(30);
but3 = new Button (this);
but3.setText("bu 3");
but3.setTextSize(30);
but4 = new Button (this);
but4.setText("bu 4");
but4.setTextSize(30);
but5 = new Button (this);
but5.setText("bu 5");
but5.setTextSize(30);
but6 = new Button (this);
but6.setText("bu 6");
but6.setTextSize(30);
but7 = new Button (this);
but7.setText("bu 7");
but7.setTextSize(30);
but8 = new Button (this);
but8.setText("bu 8");
but8.setTextSize(30);
but9 = new Button (this);
but9.setText("bu 9");
but9.setTextSize(30);
but10 = new Button (this);
but10.setText("bu 10");
but10.setTextSize(30);
but11 = new Button (this);
but11.setText("bu 11");
but11.setTextSize(30);
but12 = new Button (this);
but12.setText("bu 12");
but12.setTextSize(30);
but1.setOnClickListener(this);
but2.setOnClickListener(this);
but3.setOnClickListener(this);
but4.setOnClickListener(this);
but5.setOnClickListener(this);
but6.setOnClickListener(this);
but7.setOnClickListener(this);
but8.setOnClickListener(this);
but9.setOnClickListener(this);
but10.setOnClickListener(this);
but11.setOnClickListener(this);
but12.setOnClickListener(this);
rl.addView(but1);
rl.addView(but2);
rl.addView(but3);
rl.addView(but4);
rl.addView(but5);
rl.addView(but6);
rl.addView(but7);
rl.addView(but8);
rl.addView(but9);
rl.addView(but10);
rl.addView(but11);
rl.addView(but12);
setContentView(rl);
}