How to use

filterColor

method

in

org.mapsforge.core.graphics.GraphicUtils

@Override
public void draw(Canvas canvas, Point origin, Matrix matrix, Filter filter) {
  Point adjustedStart = xy.offset(-origin.x, -origin.y);
  Point adjustedEnd = end.offset(-origin.x, -origin.y);
  if (this.paintBack != null) {
    int color = this.paintBack.getColor();
    if (filter != Filter.NONE) {
      this.paintBack.setColor(GraphicUtils.filterColor(color, filter));
    }
    canvas.drawTextRotated(text, (int) (adjustedStart.x),
        (int) (adjustedStart.y),
        (int) (adjustedEnd.x),
        (int) (adjustedEnd.y), this.paintBack);
    if (filter != Filter.NONE) {
      this.paintBack.setColor(color);
    }
  }
  int color = this.paintFront.getColor();
  if (filter != Filter.NONE) {
    this.paintFront.setColor(GraphicUtils.filterColor(color, filter));
  }
  canvas.drawTextRotated(text, (int) (adjustedStart.x),
      (int) (adjustedStart.y),
      (int) (adjustedEnd.x),
      (int) (adjustedEnd.y), this.paintFront);
  if (filter != Filter.NONE) {
    this.paintFront.setColor(color);
  }
}

int colorF = this.paintFront.getColor();
if (filter != Filter.NONE) {
  this.paintFront.setColor(GraphicUtils.filterColor(colorF, filter));
    int colorB = this.paintBack.getColor();
    if (filter != Filter.NONE) {
      this.paintBack.setColor(GraphicUtils.filterColor(colorB, filter));
  int color = this.paintBack.getColor();
  if (filter != Filter.NONE) {
    this.paintBack.setColor(GraphicUtils.filterColor(color, filter));
  this.paintFront.setColor(GraphicUtils.filterColor(color, filter));

int color = this.backLayout.getPaint().getColor();
if (filter != Filter.NONE) {
  this.backLayout.getPaint().setColor(GraphicUtils.filterColor(color, filter));
this.frontLayout.getPaint().setColor(GraphicUtils.filterColor(color, filter));
int color = this.paintBack.getColor();
if (filter != Filter.NONE) {
  this.paintBack.setColor(GraphicUtils.filterColor(color, filter));
this.paintFront.setColor(GraphicUtils.filterColor(color, filter));

@Override
public void draw(Canvas canvas, Point origin, Matrix matrix, Filter filter) {
  Point adjustedStart = xy.offset(-origin.x, -origin.y);
  Point adjustedEnd = end.offset(-origin.x, -origin.y);
  if (this.paintBack != null) {
    int color = this.paintBack.getColor();
    if (filter != Filter.NONE) {
      this.paintBack.setColor(GraphicUtils.filterColor(color, filter));
    }
    canvas.drawTextRotated(text, (int) (adjustedStart.x),
        (int) (adjustedStart.y),
        (int) (adjustedEnd.x),
        (int) (adjustedEnd.y), this.paintBack);
    if (filter != Filter.NONE) {
      this.paintBack.setColor(color);
    }
  }
  int color = this.paintFront.getColor();
  if (filter != Filter.NONE) {
    this.paintFront.setColor(GraphicUtils.filterColor(color, filter));
  }
  canvas.drawTextRotated(text, (int) (adjustedStart.x),
      (int) (adjustedStart.y),
      (int) (adjustedEnd.x),
      (int) (adjustedEnd.y), this.paintFront);
  if (filter != Filter.NONE) {
    this.paintFront.setColor(color);
  }
}

int colorF = this.paintFront.getColor();
if (filter != Filter.NONE) {
  this.paintFront.setColor(GraphicUtils.filterColor(colorF, filter));
    int colorB = this.paintBack.getColor();
    if (filter != Filter.NONE) {
      this.paintBack.setColor(GraphicUtils.filterColor(colorB, filter));
  int color = this.paintBack.getColor();
  if (filter != Filter.NONE) {
    this.paintBack.setColor(GraphicUtils.filterColor(color, filter));
  this.paintFront.setColor(GraphicUtils.filterColor(color, filter));