Android grow LinearLayout using animation

Question

I am trying to use animation to make a layout appear on screen. The idea is that layout will start with height of 0 and grow to 100%.

I have real troubles with this and need some assistance. For some reason no animation is performed.

Here is my animation XML file

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <scale
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="0.0"
        android:toXScale="1"
        android:fromYScale="1.0"
        android:toYScale="1.0"
        android:fillAfter="false"
         />

</set>

The layout file is very basic and is designed as following

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">

<LinearLayout
        android:id="@+id/dialog"
        android:layout_width="wrap_content"
        android:layout_height="200dp"
        android:layout_centerHorizontal="true"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:background="@drawable/border">
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="Phone"
            android:id="@+id/textView"/>
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="Address"
            android:id="@+id/textView1"/>
    <Button android:id="@+id/btn1"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:text="Action 1"
            />
    <Button android:id="@+id/btn2"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:text="Action 2"
            />
</LinearLayout>
<Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Animate"
        android:id="@+id/btnAnimate" android:layout_alignParentLeft="true" android:layout_alignParentTop="true"
        android:onClick="animate"/>
</RelativeLayout>

My activity code is very basic as well

public class MyActivity extends Activity implements Animation.AnimationListener{

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
 }

public void animate(View view){
    LinearLayout dialog   = (LinearLayout)findViewById(R.id.dialog);
    dialog.setVisibility(LinearLayout.VISIBLE);
    Animation animation   =    AnimationUtils.loadAnimation(this, R.anim.anim);
    Log.i("animate","Begin Animation");
    animation.reset();
  //  animation.setFillAfter(true);
    animation.setAnimationListener(this);
    dialog.setAnimation(null);
    Log.i("animate","End Animation");
}

@Override
public void onAnimationStart(Animation animation) {
    //To change body of implemented methods use File | Settings | File Templates.
}

@Override
public void onAnimationEnd(Animation animation) {
    //To change body of implemented methods use File | Settings | File Templates.
}

@Override
public void onAnimationRepeat(Animation animation) {
    //To change body of implemented methods use File | Settings | File Templates.
}
}

Thank you

Answer 1

Ok, I figured it out.

Animation XML layout

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"
 android:fillEnabled="true"
 android:fillAfter="true">
 <scale

        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="1.0"
        android:toXScale="1.0"
        android:fromYScale="0.0"
        android:toYScale="1.0"
        android:fillAfter="false"
         />

</set>

Layout XML file

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">

  <LinearLayout
        android:id="@+id/dialog"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:visibility="invisible"
        android:background="@drawable/border">
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="Phone"
            android:id="@+id/textView"/>
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="Address"
            android:id="@+id/textView1"/>
    <Button android:id="@+id/btn1"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:text="Action 1"
            />
    <Button android:id="@+id/btn2"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:text="Action 2"
            />
   </LinearLayout>
   <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Animate"
        android:id="@+id/btnAnimate" android:layout_alignParentLeft="true" android:layout_alignParentTop="true"
        android:onClick="animate"/>
</RelativeLayout>

and my Activity class

public class MyActivity extends Activity{

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
 }

public void animate(View view){
    LinearLayout dialog   = (LinearLayout)findViewById(R.id.dialog);
    dialog.setVisibility(LinearLayout.VISIBLE);
    Animation animation   =    AnimationUtils.loadAnimation(this, R.anim.anim);
    animation.setDuration(500);
    dialog.setAnimation(animation);
    dialog.animate();
    animation.start();
 }

}