Android Spannablecontent With Rounded Corners

Question

I am trying to change my string to make a badge with a number in the middle by using Spannable String. I can highlight the appropriate letter/number by setting the BackGrou

Answer 1

Here's an improved version based on @ericlokness answer, with custom background and text colors. It also works with multiple spans on the same TextView.

public class RoundedBackgroundSpan extends ReplacementSpan
{
  private final int _padding = 20;
  private int _backgroundColor;
  private int _textColor;

  public RoundedBackgroundSpan(int backgroundColor, int textColor) {
    super();
    _backgroundColor = backgroundColor;
    _textColor = textColor;
  }

  @Override
  public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {
    return (int) (_padding + paint.measureText(text.subSequence(start, end).toString()) + _padding);
  }

  @Override
  public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint)
  {
    float width = paint.measureText(text.subSequence(start, end).toString());
    RectF rect = new RectF(x - _padding, top, x + width + _padding, bottom);
    paint.setColor(_backgroundColor);
    canvas.drawRoundRect(rect, 20, 20, paint);
    paint.setColor(_textColor);
    canvas.drawText(text, start, end, x, y, paint);
  }
}