淡入/淡出动画是否中断?

我得到了一些非常奇怪的行为与Android动画,我想了解是怎么回事。

ImageView 在xml中是不可见的,我没有设置 alpha .

图片框

if (isFadeIn) {
    myImage.animate().alpha(1.0f).setDuration(5000).withStartAction(() -> {
        myImage.setVisibility(View.VISIBLE);
        myImage.setAlpha(0.0f);
    });
} else {
    myImage.animate().alpha(0.0f).setDuration(5000)
      .withEndAction(() -> myImage.setVisibility(View.INVISIBLE));
}

现在,此代码会淡入淡出…..但第一次运行时不会淡入淡出,淡出总是闪烁:

if (isFadeIn) {
    myImage.animate().alpha(1.0f).setDuration(5000).withStartAction(() -> {
        myImage.setVisibility(View.VISIBLE);
        myImage.setAlpha(0.0f);
    }).withEndAction(() -> myImage.setAlpha(1.0f));
} else {
    myImage.animate().alpha(0.0f).setDuration(5000)
            .withStartAction(() -> {
                myImage.setAlpha(1.0f);
                myImage.setVisibility(View.VISIBLE);
            })
      .withEndAction(() -> myImage.setVisibility(View.INVISIBLE));
}

我绞尽脑汁想弄明白为什么会出现这些行为。

现在,这个代码起作用了:

fadeInAnimation.setAnimationListener(new Animation.AnimationListener() {
    @Override
    public void onAnimationStart(Animation animation) {
        myImage.setVisibility(View.VISIBLE);
    }
    @Override public void onAnimationEnd(Animation animation) { }
    @Override public void onAnimationRepeat(Animation animation) { }
});

fadeOutAnimation.setAnimationListener(new Animation.AnimationListener() {
    @Override
    public void onAnimationStart(Animation animation) { }
    @Override public void onAnimationEnd(Animation animation) {
        myImage.setVisibility(View.INVISIBLE);
    }
    @Override public void onAnimationRepeat(Animation animation) { }
});

fadeInAnimation.setDuration(5000);
fadeOutAnimation.setDuration(5000);

...

if (isFadeIn) {
    myImage.startAnimation(fadeInAnimation);
} else {                         
    myImage.startAnimation(fadeOutAnimation);
}

但它太冗长了,我不喜欢它,但现在我坚持使用它,我只是想了解其他代码有什么问题。