這裡寫程式碼片公司要求做在按鈕上做一個呼吸燈的效果，想了一下，可以做一個北京，背景執行動畫，讓他迴圈的消失和出現，首先要做兩個動畫

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:fillEnabled="true" >
    <alpha
        android:duration="1500"
        android:fromAlpha
 
="0.0"
        android:toAlpha="1.0" />

</set>

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:fillEnabled="true" >
    <alpha
        android:duration="1500"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>

然後就是自己包裝了一下的imageview

public class loopPicture extends ImageView{
    private Context mContext;
    private ImageView breathImageView;
    private Timer timer;
    private boolean isOpen = true;
    private int index = 0;
    private final int BREATH_INTERVAL_TIME = 1000; //設定呼吸燈時間間隔
    public Handler handler = new Handler() {
        public
 
 void handleMessage(Message msg) {
            switch (msg.what) {
                case 1:
                    breathImageView.clearAnimation();
                    breathImageView.setAnimation(getFadeIn());
                    break;
                case 2:
                    breathImageView.clearAnimation();
                    breathImageView.setAnimation(getFadeOut());
                    break;
            }
            super.handleMessage(msg);
        }
    };

    public loopPicture(Context context) {
        super(context);
        this.mContext=context;
        breathImageView=this;
        startTimer();
    }
    public loopPicture(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.mContext=context;
        breathImageView=this;
        startTimer();
    }

    public loopPicture(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mContext=context;
        breathImageView=this;
        startTimer();
    }

    private Animation getFadeIn() {
        Animation fadeIn = AnimationUtils.loadAnimation(mContext,
                R.anim.alpha_fade_in);
        fadeIn.setDuration(BREATH_INTERVAL_TIME);
        fadeIn.setStartOffset(100);
        return fadeIn;
    }

    private Animation getFadeOut() {
        Animation fadeOut = AnimationUtils.loadAnimation(mContext,
                R.anim.alpha_fade_out);
        fadeOut.setDuration(BREATH_INTERVAL_TIME);
        fadeOut.setStartOffset(100);
        return fadeOut;
    }

    private void startTimer() {
        timer = new Timer(true);
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                if (isOpen) {
                    if (index == 2) {
                        index = 0;
                    }
                    index++;
                    Message message = new Message();
                    message.what = index;
                    handler.sendMessage(message);
                }
            }
        };
        timer.schedule(task, 0, BREATH_INTERVAL_TIME); // 延時0ms後執行，5000ms執行一次
    }
}