Sepia.java

public Bitmap ConvertToSepia(Bitmap sampleBitmap){
  float[] sepMat = {
    0.3930000066757202f, 
    0.7689999938011169f, 
    0.1889999955892563f, 
    0,
    0, 
    0.3490000069141388f, 
    0.6859999895095825f, 
    0.1679999977350235f, 
    0,
    0, 
    0.2720000147819519f, 
    0.5339999794960022f, 
    0.1309999972581863f, 
    0, 
    0, 
    0, 
    0, 
    0, 
    1, 
    0, 
    0, 
    0, 
    0, 
    0, 
    1};
  
  ColorMatrix sepiaMatrix = new ColorMatrix();
  sepiaMatrix.set(sepMat);
  
  ColorMatrixColorFilter colorFilter = new ColorMatrixColorFilter(sepiaMatrix);
  Bitmap rBitmap = sampleBitmap.copy(Bitmap.Config.ARGB_8888, true);
  
  Paint paint = new Paint();
  paint.setColorFilter(colorFilter);

  Canvas myCanvas = new Canvas(rBitmap);
  myCanvas.drawBitmap(rBitmap, 0, 0, paint);
  return rBitmap;
}