Android之仿心跳动画实现

// 按钮模拟心脏跳动
    private  void  playHeartbeatAnimation() {
        AnimationSet animationSet = new  AnimationSet( true );
        animationSet.addAnimation( new  ScaleAnimation( 1 .0f, 1 .8f, 1 .0f, 1 .8f,
                Animation.RELATIVE_TO_SELF, 0 .5f, Animation.RELATIVE_TO_SELF,
                0 .5f));
        animationSet.addAnimation( new  AlphaAnimation( 1 .0f, 0 .4f));

        animationSet.setDuration( 200 );
        animationSet.setInterpolator( new  AccelerateInterpolator());
        animationSet.setFillAfter( true );

        animationSet.setAnimationListener( new  AnimationListener() {

            @Override
            public  void  onAnimationStart(Animation animation) {
            }

            @Override
            public  void  onAnimationRepeat(Animation animation) {
            }

            @Override
            public  void  onAnimationEnd(Animation animation) {
                AnimationSet animationSet = new  AnimationSet( true );
                animationSet.addAnimation( new  ScaleAnimation( 1 .8f, 1 .0f, 1 .8f,
                        1 .0f, Animation.RELATIVE_TO_SELF, 0 .5f,
                        Animation.RELATIVE_TO_SELF, 0 .5f));
                animationSet.addAnimation( new  AlphaAnimation( 0 .4f, 1 .0f));

                animationSet.setDuration( 600 );
                animationSet.setInterpolator( new  DecelerateInterpolator());
                animationSet.setFillAfter( false );

                                // 实现心跳的View
                imageView.startAnimation(animationSet);
            }
        });

                // 实现心跳的View
        imageView.startAnimation(animationSet);
    }

 

由于这是一个循环的动画，所以需要开一个线程来进行动画的实现，当然还有另外一个方法，就是在一个动画结束开始另一个动画，在另一个动画结束开始这个动画也可以，这边示例用的是线程。

new  Thread(){
            public  void  run() {
                while  ( true ){
                    try  {
                        Thread.sleep( 1000 );
                    } catch  (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    runOnUiThread( new  Runnable() {
                        public  void  run() {
                            playHeartbeatAnimation();
                        }
                    });
                }
            };
        }.start();