programmatic layout

public class AndroidWalkthroughApp1 extends Activity implements View.OnClickListener {
	final int TOP_ID = 3;
	final int BOTTOM_ID = 4;
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		RelativeLayout top = new RelativeLayout(this);
		top.setId(TOP_ID);
		RelativeLayout bottom = new RelativeLayout(this);
		bottom.setId(BOTTOM_ID);
		for (int i = 0; i < 2; i++) {
			Button button = new Button(this);
			button.setText("Button " + i);
			button.setId(i);
			button.setOnClickListener(this);
			add generated button to view
			if (i == 0) {
				top.addView(button);
			} else {
				bottom.addView(button);
			}
		}
		RelativeLayout root = (RelativeLayout) findViewById(R.id.root_layout);
		LinearLayout root = (LinearLayout) this.findViewById(R.id.root_layout);
		root.addView(top);
		root.addView(bottom);
	}
	@Override
	public void onClick(View v) {
		Toast toast = Toast.makeText(AndroidWalkthroughApp1.this, "You clicked button " + v.getId(), Toast.LENGTH_LONG);
		toast.show();
		RelativeLayout parentLayout = (RelativeLayout) v.getParent();
		parentLayout.removeView(v);
	}
}