Aggiungere righe a un TableLayout da codice - problema

Salve a tutti,

ho provato ad usare il tutorial su [TinyTut] - Dynamically add rows to TableLayout :: anddev.org - Android Development Community | Android Tutorials per aggiungere righe a un TableLayout da codice.

Adesso il mio file .java è così:

codice:

---

package com.ProgGrid;

import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;

public class ProgGrid extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        /* Find Tablelayout defined in main.xml */
        TableLayout tl = (TableLayout)findViewById(R.id.myTableLayout);
            /* Create a new row to be added. */
            TableRow tr = new TableRow(this);
            tr.setLayoutParams(new LayoutParams(
                            LayoutParams.FILL_PARENT,
                            LayoutParams.WRAP_CONTENT));
                  /* Create a Button to be the row-content. */
                  Button b = new Button(this);
                  b.setText("Dynamic Button");
                  b.setLayoutParams(new LayoutParams(
                            LayoutParams.FILL_PARENT,
                            LayoutParams.WRAP_CONTENT));
                  /* Add Button to row. */
                  tr.addView(b);
        /* Add row to TableLayout. */
              tl.addView(tr,new TableLayout.LayoutParams(
                  LayoutParams.FILL_PARENT,
                  LayoutParams.WRAP_CONTENT));
        setContentView(tl);
  }
}

---

mentre il main.xml è così:

codice:

---

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/myTableLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TableRow
          android:layout_width="fill_parent"
          android:layout_height="wrap_content">
         
          <Button android:text="Static Button" android:id="@+id/myButton"/>
    </TableRow>
</TableLayout>

---

Solo che quando lancio il programma sull'emulatore, vedo solo lo "Static Button".

Dov'è che sbaglio?

Non va bene:

b.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));

ma deve essere:

b.setLayoutParams(new TableRow.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));