Calculate the real scale and degree of rotation from an Android Matrix

RealScaleAndRotation

float[] v = new float[9];
matrix.getValues(v);
// translation is simple
float tX = v[Matrix.MTRANS_X];
float tY = v[Matrix.MTRANS_Y];

// calculate real scale
float scaleX = values[Matrix.MSCALE_X];
float skewY = values[Matrix.MSKEW_Y];
float realScale = (float) Math.sqrt(scaleX * scaleX + skewY * skewY);

// calculate the degree of rotation
float skewX = v[Matrix.MSKEW_X];
float realAngle = Math.round(Math.atan2(skewX, scaleX) * (180 / Math.PI));

Thanks!