Duotone ColorFilter for Android

DuotoneColorFilter.java

public ColorFilter duotoneColorFilter(@ColorInt int colorBlack, @ColorInt int colorWhite, float contrast) {
    ColorMatrix cm = new ColorMatrix();
    
    ColorMatrix cmBlackWhite = new ColorMatrix();
    float lumR = 0.2125f;
    float lumG = 0.7154f;
    float lumB = 0.0721f;
    float[] blackWhiteArray = new float[]{
                lumR, lumG, lumB, 0, 0,
                lumR, lumG, lumB, 0, 0,
                lumR, lumG, lumB, 0, 0,
                0, 0, 0, 1, 0};
    cmBlackWhite.set(blackWhiteArray);

    ColorMatrix cmContrast = new ColorMatrix();
    float scale = contrast + 1.0f;
    float translate = (-0.5f * scale + 0.5f) * 255f;
    float[] contrastArray = new float[]{
                 scale, 0, 0, 0, translate,
                0, scale, 0, 0, translate,
                0, 0, scale, 0, translate,
                0, 0, 0, 1, 0};
    cmContrast.set(contrastArray);

    ColorMatrix cmDuoTone = new ColorMatrix();
    float r1 = Color.red(colorWhite);
    float g1 = Color.green(colorWhite);
    float b1 = Color.blue(colorWhite);
    float r2 = Color.red(colorBlack);
    float g2 = Color.green(colorBlack);
    float b2 = Color.blue(colorBlack);
    float r1r2 = (r1 - r2) / 255f;
    float g1g2 = (g1 - g2) / 255f;
    float b1b2 = (b1 - b2) / 255f;
    float[] duoToneArray = new float[]{
                r1r2, 0, 0, 0, r2,
                g1g2, 0, 0, 0, g2,
                b1b2, 0, 0, 0, b2,
                0, 0, 0, 1, 0};
    cmDuoTone.set(duoToneArray);

    cm.postConcat(cmBlackWhite);
    cm.postConcat(cmContrast);
    cm.postConcat(cmDuoTone);

    return new ColorMatrixColorFilter(cm);
}

Any way this could be applied to a Paint which is then drawn on a Canvas?
Doing it like this makes the Bitmap solid colorBlack, or dark_purple in this case.

Canvas duotoneCanvas = new Canvas(mutableBitmap); Paint duotonePaint = new Paint(); ColorFilter duotoneFilter = duotoneColorFilter( ContextCompat.getColor(context, R.color.dark_purple), ContextCompat.getColor(context, R.color.bright_red), 0 ); duotonePaint.setColorFilter(duotoneFilter); duotoneCanvas.drawPaint(duotonePaint);

tks bro