ViewAnimator实现复杂的动画效果

咱们先看个原生的

AnimatorSet animatorSet = new AnimatorSet();
animatorSet.playTogether(
  ObjectAnimator.ofFloat(image,"translationY",-1000,0),
  ObjectAnimator.ofFloat(image,"alpha",0,1),
  ObjectAnimator.ofFloat(text,"translationX",-200,0)
);
animatorSet.setInterpolator(new DescelerateInterpolator());
animatorSet.setDuration(2000);
animatorSet.addListener(new AnimatorListenerAdapter(){
    @Override public void onAnimationEnd(Animator animation) {

      AnimatorSet animatorSet2 = new AnimatorSet();
      animatorSet2.playTogether(
          ObjectAnimator.ofFloat(image,"scaleX", 1f, 0.5f, 1f),
          ObjectAnimator.ofFloat(image,"scaleY", 1f, 0.5f, 1f)
      );
      animatorSet2.setInterpolator(new AccelerateInterpolator());
      animatorSet2.setDuration(1000);
      animatorSet2.start();

    }
});
animatorSet.start();

很凌乱 现在我们用ViewAnimator来实现看看效果

ViewAnimator
       .animate(image)
            .translationY(-1000, 0)
            .alpha(0,1)
       .andAnimate(text)
            .dp().translationX(-20, 0)
            .decelerate()
            .duration(2000)
       .thenAnimate(image)
            .scale(1f, 0.5f, 1f)
            .accelerate()
            .duration(1000)
       .start();

就这么几行

andAnimate 代表同时进行动画

thenAnimate代表执行完下一个动画组

项目中linlayout进入 停顿加 飞走的动画 可以参考下

 ViewAnimator.animate(ll_fans_join_msg)
                .alpha(0, 1)
                .translationX(ll_fans_join_msg.getWidth(), 0)
                .descelerate()//减速
                .duration(300)

                .thenAnimate(ll_fans_join_msg)
                .alpha(1, 1)
                .translationX(-ll_fans_join_msg.getHeight())
                .descelerate()//减速
                .duration(1250)

                .thenAnimate(ll_fans_join_msg)
                .alpha(1, 0)
                .translationX(-1.2f * ll_fans_join_msg.getWidth())
                .accelerate()//加速
                .duration(250)
                .onStop(new AnimationListener.Stop() {
                    @Override
                    public void onStop() {
                        TCSimpleUserInfo userInfo = null;
                        try {
                            userInfo = fansJoinList.remove(0);
                        } catch (Exception e) {

                        }
                        if (userInfo != null) {
                            showFansJoin(userInfo,false);
                        } else {
                            isFansJoinShowing = false;
                        }
                    }
                })
                /*.startDelay(2000)*/
                .start();

总体来说很方便能满足绝大多数需求
by磊磊tua