java - 滑らかな曲線を描く

Question

線の角度だけでなく、もっと滑らかな曲線を作りたい。これは私が現時点で描く方法です：

これが私のコードです：

case FREEHAND:
    float[] pts;
    float[] ptk;
    ptk = new float[2];
    imageMatrix.invert(inv);            
    if (mCurrentShape == null) {                
        mCurrentShape = new Line();
        pts = new float[2];
        ((Line) mCurrentShape).setBegin(mDownPoint);
        pts[0] = (float)((Line) mCurrentShape).getBegin().getX();
        pts[1] = (float)((Line) mCurrentShape).getBegin().getY();
        inv.mapPoints(pts);
        ((Line) mCurrentShape).getPath().moveTo(pts[0], pts[1]);
    }
    ptk[0] = (float)currentPoint.getX();
    ptk[1] = (float)currentPoint.getY();
    inv.mapPoints(ptk);
    ((Line) mCurrentShape).getPath().lineTo(ptk[0], ptk[1]);
    break;

フリーハンド コード:

package aa.bb.cc;
import java.util.ArrayList;
import android.graphics.Path;

public class FreeHand extends Shape{
    private ArrayList<Path>_graphics;

    public FreeHand(){
        super();
        _graphics = new ArrayList<Path>();
    }

    public ArrayList<Path> getGraphicsPath(){
        return _graphics;
    }
}