<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" 
    android:background="#a8a8a8">

    <ViewFlipper
        android:id="@+id/viewFlipper"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
         >

        <include
            android:id="@+id/one_layout1"
            layout="@layout/activity_one" />

        <include
            android:id="@+id/two_layout2"
            layout="@layout/activity_two"
            android:visibility="gone" />
    </ViewFlipper>

</RelativeLayout>
 

	private void changeOneOrTwo()
	{
		float halfWidth = viewFlipper.getWidth() / 2.0f;
		float halfHeight = viewFlipper.getHeight() / 2.0f;
		int duration = 300;
		int depthz = 0;// viewFlipper.getWidth()/2;

		if (oneOrTwo == 1)
		{
			oneOrTwo = 2;
			Rotate3dAnimation in = new Rotate3dAnimation(-90, 0, halfWidth,
					halfHeight, depthz, false);
			in.setDuration(duration);
			in.setStartOffset(duration);

			viewFlipper.setInAnimation(in);
			Rotate3dAnimation out = new Rotate3dAnimation(0, 90, halfWidth,
					halfHeight, depthz, false);
			out.setDuration(duration);

			viewFlipper.setOutAnimation(out);
			viewFlipper.showNext();

		} else
		{
			oneOrTwo = 1;
			one_layout1.setVisibility(View.VISIBLE);
			two_layout2.setVisibility(View.GONE);

			Rotate3dAnimation in = new Rotate3dAnimation(90, 0, halfWidth,
					halfHeight, depthz, false);
			in.setDuration(duration);
			in.setStartOffset(duration);
			viewFlipper.setInAnimation(in);

			Rotate3dAnimation out = new Rotate3dAnimation(0, -90, halfWidth,
					halfHeight, depthz, false);
			out.setDuration(duration);

			viewFlipper.setOutAnimation(out);
			viewFlipper.showPrevious();
		}
	}