content: package com.rsen.github.loadview.indicator;
  
  import android.animation.Animator;
  import android.animation.ValueAnimator;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.RectF;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Created by Jack on 2015/10/16.
   */
  public class BallClipRotateIndicator extends BaseIndicatorController {
  
      float scaleFloat=1,degrees;
  
      @Override
      public void draw(Canvas canvas, Paint paint) {
          paint.setStyle(Paint.Style.STROKE);
          paint.setStrokeWidth(3);
  
          float circleSpacing=12;
          float x = (getWidth()) / 2;
          float y=(getHeight()) / 2;
          canvas.translate(x, y);
          canvas.scale(scaleFloat, scaleFloat);
          canvas.rotate(degrees);
          RectF rectF=new RectF(-x+circleSpacing,-y+circleSpacing,0+x-circleSpacing,0+y-circleSpacing);
          canvas.drawArc(rectF, -45, 270, false, paint);
      }
  
      @Override
      public List<Animator> createAnimation() {
          List<Animator> animators=new ArrayList<>();
          ValueAnimator scaleAnim=ValueAnimator.ofFloat(1,0.6f,0.5f,1);
          scaleAnim.setDuration(750);
          scaleAnim.setRepeatCount(-1);
          scaleAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
              @Override
              public void onAnimationUpdate(ValueAnimator animation) {
                  scaleFloat = (float) animation.getAnimatedValue();
                  postInvalidate();
              }
          });
          scaleAnim.start();
  
          ValueAnimator rotateAnim=ValueAnimator.ofFloat(0,180,360);
          rotateAnim.setDuration(750);
          rotateAnim.setRepeatCount(-1);
          rotateAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
              @Override
              public void onAnimationUpdate(ValueAnimator animation) {
                  degrees = (float) animation.getAnimatedValue();
                  postInvalidate();
              }
          });
          rotateAnim.start();
          animators.add(scaleAnim);
          animators.add(rotateAnim);
          return animators;
      }
  
  }
  