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

Question

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); 

Answer 1

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.

Answer 2

Found the answer in How to lay out Views in RelativeLayout programmatically?

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