android - 淡入淡出动画

Question

我正在尝试在 android 中制作淡入淡出的动画。通过单击发生图像转换，我可以看到下一张图像。

但是如何通过点击第二张图片回到第一张图片呢？

public void fade (View view) {
    ImageView naruto = (ImageView) findViewById(R.id.naruto);
    ImageView sasuke = (ImageView) findViewById(R.id.sasuke);
    naruto.animate().alpha(0f).setDuration(2000);
    sasuke.animate().alpha(1f).setDuration(2000);
}

public void reappear (View view) {
    ImageView sasuke1 = (ImageView) findViewById(R.id.sasuke);
    ImageView naruto1 = (ImageView) findViewById(R.id.naruto);
    sasuke1.animate().alpha(0f).setDuration(2000);
    naruto1.animate().alpha(1f).setDuration(2000);
}

Answer 1

淡入淡出:

public void fade (View view) {
    ImageView naruto = (ImageView) findViewById(R.id.naruto);
    ImageView sasuke = (ImageView) findViewById(R.id.sasuke);
    naruto.animate().alpha(0f).setDuration(2000).setListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            naruto.setVisibility(View.GONE);
        }
    });
    sasuke.setAlpha(0f);
    sasuke.setVisibility(View.VISIBLE);
    sasuke.animate().alpha(1f).setDuration(2000).setListener(null);
}

重新出现:

public void reappear (View view) {
    ImageView sasuke = (ImageView) findViewById(R.id.sasuke);
    ImageView naruto = (ImageView) findViewById(R.id.naruto);
    sasuke.animate().alpha(0f).setDuration(2000).setListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            naruto.setVisibility(View.GONE);
        }
    });
    naruto.setAlpha(0f);
    naruto.setVisibility(View.VISIBLE);
    naruto.animate().alpha(1f).setDuration(2000);
}