Erase previous path in Android Application

I have an android application that draws a path of points in an arraylist (named 'test'). An algorithm updates the arraylist to make the path shorter each time (it uses the Travelling Salesman Problem algorithm). The problem I am facing at the moment is that the previous path does not clear, instead the new path draws over the previous one.

//this class draws a line public void CompDrawLine(List test) { // int d = 0; int i=0; test.add(test.get(0)); Point c = test.get(i);

    for (i=0;i<(test.size()-1);i++)

    {
        cPath.moveTo(c.x,c.y);
        c = test.get(i+1);
        cPath.lineTo(c.x,c.y);
        mCanvas.drawPath(cPath,cPaint);

        //cPath.reset();


    }

    // cPath.reset();
    invalidate();

}