How to create a RelativeLayout programmatically with two buttons one on top of the other?

I'm adding two buttons to the UI, but they appear on top of one another. I want them to appear next to each other. What am I missing in this code?

m_btnCrown = new ImageButton(this);
m_btnCrown.setImageResource(R.drawable.king_crown_thumb);
m_btnCrown.setAlpha(100);

RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
	RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);


addContentView(m_btnCrown, lp);


m_btnMonkey = new ImageButton(this);
m_btnMonkey.setImageResource(R.drawable.monkey_small);
m_btnMonkey.setAlpha(100);

lp = new RelativeLayout.LayoutParams(
	RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
lp.addRule(RelativeLayout.RIGHT_OF, m_btnCrown.getId());   

addContentView(m_btnMonkey, lp);

I have written a quick example to demonstrate how to create a layout programmatically.

public class CodeLayout extends Activity {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // Creating a new RelativeLayout
        RelativeLayout relativeLayout = new RelativeLayout(this);
        
        // Defining the RelativeLayout layout parameters.
        // In this case I want to fill its parent
        RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(
        		RelativeLayout.LayoutParams.FILL_PARENT,
        		RelativeLayout.LayoutParams.FILL_PARENT);
        
        // Creating a new TextView
        TextView tv = new TextView(this);
        tv.setText("Test");
        
        // Defining the layout parameters of the TextView
        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
        		RelativeLayout.LayoutParams.WRAP_CONTENT,
        		RelativeLayout.LayoutParams.WRAP_CONTENT);
        lp.addRule(RelativeLayout.CENTER_IN_PARENT);
        
        // Setting the parameters on the TextView
        tv.setLayoutParams(lp);
        
        // Adding the TextView to the RelativeLayout as a child
        relativeLayout.addView(tv);
        
        // Setting the RelativeLayout as our content view
        setContentView(relativeLayout, rlp);
    }
}

In theory everything should be clear as it is commented. If you don't understand something just tell me.

Found the answer in https://stackoverflow.com/questions/2305395/laying-out-views-in-relativelayout-programmatically/2499721#2499721

We should explicitly set id's using setId(). Only then, RIGHT_OF rules make sense.

Another mistake I did is, reusing the layoutparams object between the controls. We should create new object for each control

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);
        
        // create two layouts to hold buttons
        RelativeLayout top = new RelativeLayout(this);
        top.setId(TOP_ID);
        RelativeLayout bottom = new RelativeLayout(this);
        bottom.setId(BOTTOM_ID);
        
        // create buttons in a loop
        for (int i = 0; i < 2; i++) {
        	Button button = new Button(this);
        	button.setText("Button " + i);
        	// R.id won't be generated for us, so we need to create one
        	button.setId(i);
        	
        	// add our event handler (less memory than an anonymous inner class)
        	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);
         
        // add generated layouts to root layout view
       // LinearLayout root = (LinearLayout)this.findViewById(R.id.root_layout);

        root.addView(top);
        root.addView(bottom);
    }
    
    @Override
	public void onClick(View v) {
		// show a message with the button's ID
		Toast toast = Toast.makeText(AndroidWalkthroughApp1.this, "You clicked button " + v.getId(), Toast.LENGTH_LONG);
		toast.show();
		
		// get the parent layout and remove the clicked button
		RelativeLayout parentLayout = (RelativeLayout)v.getParent();
		parentLayout.removeView(v);
		
		

	}
}