Aligning TextViews in a TableRow

I am trying to align 3 text views in a tablerow like this:

|------------------------------------------------|
| {TextView1} {TextView2}            {TextView3} |
|------------------------------------------------|

// TextView 1, 2 Left aligned
// TextView 3 Right aligned

Also, the table row should fill the table width.

With the code below I can only achieve this:

|------------------------------------------------|
| {TextView1} {TextView2} {TextView3}            |
|------------------------------------------------|

I code:

TableRow tr = new TableRow(myActivity.this);

TextView tvLeft = new TextView(myActivity.this);
tvLeft.setText(values[0]);

TextView tvCenter = new TextView(myActivity.this);
tvCenter.setText(values[1]);

TextView tvRight = new TextView(myActivity.this);
tvRight.setText(values[2]);
tvRight.setGravity(Gravity.RIGHT);

tr.addView(tvLeft);
tr.addView(tvCenter);
tr.addView(tvRight);

myTable.addView(tr);

The right text view is not gravitating to the right, AND the table row does not fill the table width. Do I need to use weights on the text views?

Edit: Added TableLayout:

<TableLayout 
android:layout_height="wrap_content"
android:id="@+id/myTable" 
android:layout_width="fill_parent" 
>
</TableLayout>