@Override
 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  super.onSizeChanged(w, h, oldw, oldh);
  mStartX = 100;
  mStartY = 100;
  mEndX = w - 100;
  mEndY = h - 100;
  mControlX = w - 100;
  mControlY = 100;
 }

@Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  canvas.drawCircle(mStartX, mStartY, 24, mCirclePaint);
  canvas.drawCircle(mEndX, mEndY, 24, mCirclePaint);
  mPath.reset();
  mPath.moveTo(mStartX, mStartY);
  mPath.quadTo(mControlX, mControlY, mEndX, mEndY);
  canvas.drawPath(mPath, mPathPaint);
 }

/**
 * 计算贝赛尔曲线坐标的工具类
 */

public class BezierUtil {
 /**
  * B(t) = (1 - t)^2 * P0 + 2t * (1 - t) * P1 + t^2 * P2, t ∈ [0,1]
  *
  * @param t 曲线长度比例
  * @param p0 起始点
  * @param p1 控制点
  * @param p2 终止点
  * @return t对应的点
  */
 public static PointF calculateBezierPointForQuadratic(float t, PointF p0, PointF p1, PointF p2) {
  PointF point = new PointF();
  float temp = 1 - t;
  point.x = temp * temp * p0.x + 2 * t * temp * p1.x + t * t * p2.x;
  point.y = temp * temp * p0.y + 2 * t * temp * p1.y + t * t * p2.y;
  return point;
 }

 /**
  * B(t) = P0 * (1-t)^3 + 3 * P1 * t * (1-t)^2 + 3 * P2 * t^2 * (1-t) + P3 * t^3, t ∈ [0,1]
  *
  * @param t 曲线长度比例
  * @param p0 起始点
  * @param p1 控制点1
  * @param p2 控制点2
  * @param p3 终止点
  * @return t对应的点
  */
 public static PointF calculateBezierPointForCubic(float t, PointF p0, PointF p1, PointF p2, PointF p3) {
  PointF point = new PointF();
  float temp = 1 - t;
  point.x = p0.x * temp * temp * temp + 3 * p1.x * t * temp * temp + 3 * p2.x * t * t * temp + p3.x * t * t * t;
  point.y = p0.y * temp * temp * temp + 3 * p1.y * t * temp * temp + 3 * p2.y * t * t * temp + p3.y * t * t * t;
  return point;
 }
}

/**
 * 贝赛尔曲线估值器
 */
public class BezierEvaluator implements TypeEvaluator<PointF> {

 /* 控制点坐标 */
 private PointF mControlPoint;

 public BezierEvaluator(PointF controlPoint) {
  mControlPoint = controlPoint;
 }

 @Override
 public PointF evaluate(float v, PointF pointF, PointF t1) {
  return BezierUtil.calculateBezierPointForQuadratic(v, pointF, mControlPoint, t1);
 }
}

 @Override
 public void onClick(View view) {
  BezierEvaluator evaluator = new BezierEvaluator(new PointF(mControlX, mControlY));
  PointF startPoint = new PointF(mStartX, mStartY);
  PointF endPoint = new PointF(mEndX, mEndY);
  ValueAnimator anim = ValueAnimator.ofObject(evaluator, startPoint, endPoint);
  anim.setDuration(1000);
  anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
   @Override
   public void onAnimationUpdate(ValueAnimator valueAnimator) {
    PointF curPoint = (PointF) valueAnimator.getAnimatedValue();
    mCurX = (int) curPoint.x;
    mCurY = (int) curPoint.y;
    invalidate();
   }
  });
  anim.start();
 }

canvas.drawCircle(mCurX, mCurY, 24, mCirclePaint);