[英]Get what the WRAP_CONTENT height would be
My purpose is to have an invisible LinearLayout that appear whit an animation when click on a specific button. 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。 To do this i have set the default height to WRAP_CONTENT, get the height when the app start, set the height to 0 and start the animation when i click on the button.
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。 Here is the code:
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);
}
});
This work pretty good, but i want to do different. 这项工作还不错,但我想做的不同。 I want that the default height is 0, and then calculate what the WRAP_CONTENT height would be, and pass it to:
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 */);
How could i do this? 我怎么能这样做? I searched but found anything.
我搜索但发现了什么。
Try this code: 试试这段代码:
linearLayout.measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
height = linearLayout.getMeasuredHeight();
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