Android : Linear Layout Android get height of a button

In my code I created a horizontal scroll view in which I append buttons. I've already a starting button. In java code I want to get the size of the button already there to shape a new one just like the other and append it.

Here is the .xml code:

 <TableRow android:layout_width="fill_parent" android:layout_weight="1" android:background="#ff11ff12">

    <HorizontalScrollView
        android:layout_width="wrap_content"
        android:layout_height="0dip"
        android:id="@+id/horizontalScrollView"
        android:layout_column="0"
        android:focusableInTouchMode="false"
        android:fillViewport="false">

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="0dip"
            android:id="@+id/scrollLayout">

            <Button
                android:layout_width="wrap_content"
                android:layout_height="0dip"
                android:text="New Button"
                android:id="@+id/button"
                android:width="1000px"
                />
        </LinearLayout>
    </HorizontalScrollView>

</TableRow>

And the java code:

 LinearLayout scrollLayout = (LinearLayout)findViewById(R.id.scrollLayout);

    Button btnCriar = (Button)findViewById(R.id.button);

    int width, height;
    width = btnCriar.getMaxWidth();
    height = btnCriar.getMaxHeight();

    Button btn = new Button(this);
    btn.setText("Botão de perfil");

    btn.setWidth(width);
    btn.setHeight(height);

    scrollLayout.addView(btn);

The height is returning -1 and I need to know the real height.