我的目的是让一个看不见的LinearLayout在点击特定按钮时显示为动画.为此,我将默认高度设置为WRAP_CONTENT,获取应用程序启动时的高度,将高度设置为0,并在单击按钮时启动动画.这是代码:
linearLayout.post(new Runnable() { @Override public void run(){ height = linearLayout.getMeasuredHeight(); linearLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,0)); } }); findViewById(R.id.btnOperator).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Animation ani = new ShowAnim(linearLayout,height/* target layout height */); ani.setDuration(1000/* animation time */); linearLayout.startAnimation(ani); } });
这项工作还不错,但我想做的不同.我希望默认高度为0,然后计算WRAP_CONTENT高度,并将其传递给:
Animation ani = new ShowAnim(linearLayout,height/* target layout height */);
我怎么能这样做?我搜索但发现了什么.
解决方法
试试这段代码:
linearLayout.measure(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT); height = linearLayout.getMeasuredHeight();