So based upon the comments of LairdPleng and 323go I ended up just creating a custom view. The following view will do the centering exactly based upon the height of the number being drawn...
public class Label extends View {
private static final int TEXT_SIZE = 56;
private String mText;
private float mCenterX;
private float mCenterY;
private float mRadius;
private Paint mCirclePaint;
private Paint mTextPaint;
private Rect mTextBounds;
public HoleLabel(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setupCanvasComponents(context);
}
public HoleLabel(Context context, AttributeSet attrs) {
super(context, attrs);
setupCanvasComponents(context);
}
public HoleLabel(Context context) {
super(context);
setupCanvasComponents(context);
}
public void setText(String text) {
if (!StringUtils.equals(mText, text)) {
mText = text;
invalidate();
}
}
private void setupCanvasComponents(Context context) {
mCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCirclePaint.setColor(Color.BLACK);
mCirclePaint.setStyle(Paint.Style.FILL);
Typeface font = Typeface.createFromAsset(context.getAssets(), "fonts/CustomFont.otf");
DisplayMetrics displayMetrics = new DisplayMetrics();
((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
.getDefaultDisplay().getMetrics(displayMetrics);
float scaledDensity = displayMetrics.scaledDensity;
mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.LINEAR_TEXT_FLAG);
mTextPaint.setColor(Color.WHITE);
mTextPaint.setStyle(Paint.Style.FILL);
mTextPaint.setTextSize(TEXT_SIZE * scaledDensity);
mTextPaint.setTypeface(font);
mTextPaint.setTextAlign(Align.CENTER);
mTextBounds = new Rect();
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mCenterX = w / 2.0f;
mCenterY = h / 2.0f;
mRadius = w / 2.0f;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// Draw the background
canvas.drawCircle(mCenterX, mCenterY, mRadius, mCirclePaint);
// Draw the text
if (mText != null) {
mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBounds);
canvas.drawText(mText, mCenterX, (mCenterY + mTextBounds.height() / 2), mTextPaint);
}
}
}
And in xml...
<com.example.widget.Label
android:id="@+id/label"
android:layout_width="72dip"
android:layout_height="72dip"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_margin="8dip" />
The result being...
I had a very specific use case so I don't know if it'll work well if with less rigid size specifications but it was the way to go for me.