DefaultRefreshIndicator.java 文件源码

private void initAnimation() {
    LinearInterpolator linearInterpolator=new LinearInterpolator();
    flipUpAnimation =new RotateAnimation(0,-180,RotateAnimation.RELATIVE_TO_SELF,0.5f,RotateAnimation.RELATIVE_TO_SELF,0.5f);
    flipUpAnimation.setDuration(FLIP_DURATION);
    flipUpAnimation.setFillAfter(true);
    flipUpAnimation.setInterpolator(linearInterpolator);

    flipDownAnimation=new RotateAnimation(-180,0,RotateAnimation.RELATIVE_TO_SELF,0.5f,RotateAnimation.RELATIVE_TO_SELF,0.5f);
    flipDownAnimation.setDuration(FLIP_DURATION);
    flipDownAnimation.setFillAfter(true);
    flipDownAnimation.setInterpolator(linearInterpolator);

    infiniteRotation=new RotateAnimation(0,360,RotateAnimation.RELATIVE_TO_SELF,0.5f,RotateAnimation.RELATIVE_TO_SELF,0.5f);
    infiniteRotation.setDuration(ROTATE_DURATION);
    infiniteRotation.setRepeatCount(Animation.INFINITE);
    infiniteRotation.setInterpolator(linearInterpolator);
}