android: 属性动画事件的监控

一，代码：

        //给按钮增加点击事件:旋转
        Button rotateButton = findViewById(R.id.rotateButton);
        rotateButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ObjectAnimator animator = ObjectAnimator.ofFloat(imageView, "rotation", 0f, 360f);
                animator.setDuration(2000);

                animator.addListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationStart(Animator animator) {
                        // 动画完成时显示Toast消息
                        Toast.makeText(AnimActivity.this, "动画开始", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onAnimationEnd(Animator animator) {
                        // 动画完成时显示Toast消息
                        Toast.makeText(AnimActivity.this, "动画结束", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onAnimationCancel(Animator animator) {
                        Toast.makeText(AnimActivity.this, "动画取消", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onAnimationRepeat(Animator animator) {
                        Toast.makeText(AnimActivity.this, "动画重复", Toast.LENGTH_SHORT).show();
                    }
                });


                animator.start(); // 启动动画
            }
        });

二，测试效果: