How to achieve smooth expand/collapse animation

Question

I\'m referring the expand / collapse animation code found here.

Android: Expand/collapse animation

Although it works, it doesn\'t do the job well. The animat

Answer 1

Its very easy to get smooth animation (Expand/Collapse) on View

public void expandOrCollapse(final View v,String exp_or_colpse) {
    TranslateAnimation anim = null;
    if(exp_or_colpse.equals("expand"))
    {
        anim = new TranslateAnimation(0.0f, 0.0f, -v.getHeight(), 0.0f);
        v.setVisibility(View.VISIBLE);  
    }
    else{
        anim = new TranslateAnimation(0.0f, 0.0f, 0.0f, -v.getHeight());
        AnimationListener collapselistener= new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationEnd(Animation animation) {
            v.setVisibility(View.GONE);
            }
        };

        anim.setAnimationListener(collapselistener);
    }

     // To Collapse
        //

    anim.setDuration(300);
    anim.setInterpolator(new AccelerateInterpolator(0.5f));
    v.startAnimation(anim);
}

And use this method in your code. I have used in TextView and it is tested .You may pass your view in this method as a parameter.

        TextView tv=(TextView)findViewById(R.id.textview);
          //TO Expand 
         expandOrCollapse(tv,"expand");

        //TO Collapse
        expandOrCollapse(tv,"collapse");

ANd Enjoy smooth Collapse and Expand Animation................