android - 过渡动画后 EditText 提示不可见

Question

我想用过渡动画为 EditText 设置动画。完成动画后，提示不会显示，但是当我调用 edittext.requestLayout 或当用户聚焦到 edittext 提示时会出现。 requestLayout 听起来像是一种变通方法什么是真正的解决方案？

final EditText text = (EditText) findViewById(R.id.editText);
AutoTransition autoTransition = new AutoTransition();
TransitionSet transitionSet = new TransitionSet();
transitionSet.addTransition(autoTransition);
transitionSet.setDuration(2000);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) text.getLayoutParams();
params.width = 0;
params.height = 0;
text.setLayoutParams(params);
transitionSet.addListener(new Transition.TransitionListener() {
    @Override
    public void onTransitionStart(@NonNull Transition transition) {

    }

    @Override
    public void onTransitionEnd(@NonNull Transition transition) {
        AutoTransition autoTransition = new AutoTransition();
        TransitionSet transitionSet = new TransitionSet();
        transitionSet.addTransition(autoTransition);
        transitionSet.setDuration(2000);
        LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)  text.getLayoutParams();
        params.width = -2;
        params.height = -2;
        text.setLayoutParams(params);
        TransitionManager.beginDelayedTransition((ViewGroup) text.getParent(), transitionSet);
    }

    @Override
    public void onTransitionCancel(@NonNull Transition transition) {

    }

    @Override
    public void onTransitionPause(@NonNull Transition transition) {

    }

    @Override
    public void onTransitionResume(@NonNull Transition transition) {

    }
});
TransitionManager.beginDelayedTransition((ViewGroup) text.getParent(), transitionSet);
}

Answer 1

问题是与支持转换相关的 Android 错误及其 resolved在支持 27.1.1 中。