Java – get wrap_ Content height

My goal is to animate an invisible linear layout when a specific button is clicked To do this, I set the default height to wrap_ Content, get the height when the application starts, set the height to 0, and start the animation when you click the button This is the code:

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);

    }
});

It's a good job, but I want to do something different I want the default height to be 0 and then calculate wrap_ Content height and pass it to:

Animation ani = new ShowAnim(linearLayout,height/* target layout height */);

How can I do that? I searched but found something

Solution

Try this Code:

linearLayout.measure(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
height = linearLayout.getMeasuredHeight();