动画后按钮 alpha 未恢复

Question

我想知道为什么在我的按钮 giftFinal 下面的代码中没有取回他的 alpha。执行后按钮文本不可见。甚至没有设置文本颜色或背景颜色：

final float alpha=giftFinal.getAlpha();
            Animation fadeOut = new AlphaAnimation(1, 0);
            fadeOut.setStartOffset(30000);
            fadeOut.setDuration(2000);
            fadeOut.setFillAfter(true);
            fadeOut.setAnimationListener(new AnimationListener(){

                @Override
                public void onAnimationEnd(Animation animation) {
                    if(help!=null) {
                        //palce old help text back again
                            giftFinal.setText(help);
                            giftFinal.setTextColor(Color.BLACK);
                            giftFinal.setBackgroundColor(Color.WHITE);
                            giftFinal.setAlpha(alpha);
                            giftFinal.setVisibility(View.VISIBLE);
                        }
                }

                @Override
                public void onAnimationRepeat(Animation animation) {}

                @Override
                public void onAnimationStart(Animation animation) {}
            });
            giftFinal.startAnimation(fadeOut);

Answer 1

这是因为您已将 setFillAfter 设置为 true。根据documentation,"If fillAfter is true, the transformation that this animation performed will persist when it is finished. Defaults to false if not set."所以去掉fadeOut.setFillAfter(true)或者改成fadeOut.setFillAfter(false).

动画后按钮 alpha 未恢复

button alpha not restored after animation

android

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