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    <p>I believe the simplest approach is to extend <code>Animation</code> class and override <code>applyTransformation()</code> to change the view's height as follows:</p> <pre><code>import android.view.View; import android.view.ViewGroup.LayoutParams; import android.view.animation.Animation; import android.view.animation.Transformation; import android.widget.LinearLayout; public class MyCustomAnimation extends Animation { public final static int COLLAPSE = 1; public final static int EXPAND = 0; private View mView; private int mEndHeight; private int mType; private LinearLayout.LayoutParams mLayoutParams; public MyCustomAnimation(View view, int duration, int type) { setDuration(duration); mView = view; mEndHeight = mView.getHeight(); mLayoutParams = ((LinearLayout.LayoutParams) view.getLayoutParams()); mType = type; if(mType == EXPAND) { mLayoutParams.height = 0; } else { mLayoutParams.height = LayoutParams.WRAP_CONTENT; } view.setVisibility(View.VISIBLE); } public int getHeight(){ return mView.getHeight(); } public void setHeight(int height){ mEndHeight = height; } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { super.applyTransformation(interpolatedTime, t); if (interpolatedTime &lt; 1.0f) { if(mType == EXPAND) { mLayoutParams.height = (int)(mEndHeight * interpolatedTime); } else { mLayoutParams.height = (int) (mEndHeight * (1 - interpolatedTime)); } mView.requestLayout(); } else { if(mType == EXPAND) { mLayoutParams.height = LayoutParams.WRAP_CONTENT; mView.requestLayout(); }else{ mView.setVisibility(View.GONE); } } } } </code></pre> <p>To use it, set your <code>onclick()</code> as follows:</p> <pre><code>int height; @Override public void onClick(View v) { if(view2.getVisibility() == View.VISIBLE){ MyCustomAnimation a = new MyCustomAnimation(view2, 1000, MyCustomAnimation.COLLAPSE); height = a.getHeight(); view2.startAnimation(a); }else{ MyCustomAnimation a = new MyCustomAnimation(view2, 1000, MyCustomAnimation.EXPAND); a.setHeight(height); view2.startAnimation(a); } } </code></pre> <p>Regards.</p>
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    1. POAnimate view sliding out of another view, pushing views below out of the way
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    1. USPatrick Boos
    1. USLuis
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    1. COThis works perfectly! Thanks!
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      1. USnhaarman
    2. COGlad to help. Thanks for the bounty :-)
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    3. COThanks! It has been very useful for me
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      1. USAlex
 

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