Android用Canvas绘制贝塞尔曲线

public class MyPathView extends View {
private int height;
private int width;
private Path path;//路径
private Paint mPaint;
private Paint mPaintpoint;
private int count;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 0x23://这应该写一个static final的变量
count++;
if (count < 80) {//形成循环，因为波浪线是两段40所以一个周期80
                        setCount(count);
handler.sendEmptyMessageDelayed(0x23, 20);
                    } else {
count = 0;
handler.sendEmptyMessageDelayed(0x23, 20);
                    }
break;
            }

        }
    };

public void setCount(int count) {
this.count = count;
        invalidate();
    }

public MyPathView(Context context) {
super(context);
    }

public MyPathView(Context context, AttributeSet attrs) {
super(context, attrs);
path = new Path();
mPaint = new Paint();
mPaintpoint = new Paint();
mPaintpoint.setStrokeWidth(10);
mPaintpoint.setColor(Color.YELLOW);
mPaint.setAntiAlias(true);
mPaint.setTextSize(50);
mPaint.setStyle(Paint.Style.STROKE);
handler.sendEmptyMessage(0x23);//
    }

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
height = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec);
        setMeasuredDimension(width, height);
    }

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

path.reset();
path.moveTo(count, 100);
for (int i = 0; i < 10; i++) {
path.rQuadTo(20, 10, 40, 0);//以（count=0，100）为原点开始画，控制点、结束点
path.rQuadTo(20, -10, 40, 0);//以（40，0）为原点开始画，形成一个类似余弦的波浪周期
        }
        canvas.drawPath(path, mPaint);
使用quadTo绘制曲线
//      path.moveTo(100, 100);
//        path.quadTo(100, 400, 300, 300);//控制点终点
//        canvas.drawPoint(100,100,mPaintpoint);//起点
//        canvas.drawPoint(100,400,mPaintpoint);//控制点
//        canvas.drawPoint(300,300,mPaintpoint);//终点
}
}