在android中一个接一个地无限重复两个不同的动画

Question

我正在Andorid中为动画尝试以下代码

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.lay);
        rel = (LinearLayout) findViewById(R.id.rel);
        rel.setBackgroundDrawable(getResources().getDrawable(R.drawable.gradient_background));


        animation = new AlphaAnimation(1, 0);
        animation.setDuration(500);
        animation.setInterpolator(new LinearInterpolator());
        animation.setRepeatCount(3);
        rel.startAnimation(animation);

        animation1 = new AlphaAnimation(1, 0);
        animation1.setDuration(1500);
        animation1.setInterpolator(new LinearInterpolator());
        animation1.setRepeatCount(3);

        animationchala();




    }

   public void  animationchala(){
        animation.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            public void onAnimationEnd(Animation animation) {
                animation.setAnimationListener(null);

                rel.startAnimation(animation1);


            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }
        });

        animation1.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation1) {

            }

            public void onAnimationEnd(Animation animation1) {
                animation1.setAnimationListener(null);
                rel.startAnimation(animation);


            }

            @Override
            public void onAnimationRepeat(Animation animation1) {
            }
        });
    }

代码第一次有效。

当动画结束时动画1开始，然后动画1结束并再次启动动画，但是现在当动画1必须再次开始它停止时，我怎么能一个接一个地重复动画

Answer 1

问题在于您在启动新动画时将animationListeners设置为null。这使得它们在您开始动画后停止。只需像这样重新安排您的代码;

public void  animationchala(){
    animation.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }

        public void onAnimationEnd(Animation animation) {

            rel.startAnimation(animation1);


        }

        @Override
        public void onAnimationRepeat(Animation animation) {
        }
    });

    animation1.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation1) {

        }

        public void onAnimationEnd(Animation animation1) {
            rel.startAnimation(animation);


        }

        @Override
        public void onAnimationRepeat(Animation animation1) {
        }
    });
}