实现点击view并隐藏与显示指定view_android 自定义view双击隐藏当前view-优快云博客

本文链接：https://blog.youkuaiyun.com/zheweixingzhang/article/details/51649714

本文介绍了一种使用ValueAnimator实现布局折叠与展开动画的方法。通过测量布局的高度并利用ValueAnimator动态改变布局参数，实现了平滑的折叠与展开效果。该方法适用于Android应用中需要动态展示或隐藏详细内容的场景。

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private void togle() {
        ll_des_container.measure(0, 0);
        int start = ll_des_container.getMeasuredHeight(); //动画的开始高度
        int end = 0; //动画的结束高度
        if (mIsOpen) {//折叠
            /**对应布局的高度发生了变化
             从一个应有的高度到0的过程*/
            //            int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
            //            int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
            //            ll_des_container.measure(widthMeasureSpec, heightMeasureSpec);
            ValueAnimator animator = ValueAnimator.ofInt(start, end);
            animator.start();
            animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    int animatedValue = (int) animation.getAnimatedValue();
                    //修改高度
                    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) ll_des_container.getLayoutParams();
                    params.height = animatedValue;
                    ll_des_container.setLayoutParams(params);
                }
            });

        } else {  //打开
            ValueAnimator animator = ValueAnimator.ofInt(end, start);
            animator.start();
            animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    int animatedValue = (int) animation.getAnimatedValue();
                    //修改高度
                    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) ll_des_container.getLayoutParams();
                    params.height = animatedValue;
                    ll_des_container.setLayoutParams(params);
                }
            });
        }
        mIsOpen = !mIsOpen;
    }