I want to create animation with two actions. First action: view go forward, second action: view go back. I create xml for describe animation, but it doesn't work. Thank you for your attention. My /anim/move_animation.xml:
 <?xml version="1.0" encoding="utf-8"?>
    <set xmlns:android="http://schemas.android.com/apk/res/android"
                android:interpolator="@android:anim/linear_interpolator">
          <translate
           android:fromYDelta="50%" 
           android:toYDelta="50%"
           android:fromXDelta="0%" 
           android:toXDelta="50%"
           android:duration="2000" />
        <translate
           android:startOffset="2000"
           android:fromYDelta="50%" 
           android:toYDelta="50%"
           android:fromXDelta="50%" 
           android:toXDelta="0%"
           android:duration="2000" />
    </set>
Activity:
public class TestActivity extends Activity {
    private LinearLayout LL;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        LL = (LinearLayout) this.findViewById(R.id.MainLayout);
        Animation anim = AnimationUtils.loadAnimation(this, R.anim.move_animation);
        LL.startAnimation(anim);
    }
}
Layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:id="@+id/MainLayout" >
     <ImageView
          android:id="@+id/Icon"
          android:layout_width="30dp"
          android:layout_height="30dp"
          android:background="@drawable/icon" >
      </ImageView>
</LinearLayout>