android中的flipper问题

在一个xml文件中，我用flipper创建了一些布局。 主xml文件：-

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="#ffffff"
android:id="@+id/layout_main">

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


<RelativeLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:id="@+id/facebook_layout">


    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:background="#ffffff"
        android:id="@+id/videolist">
<ImageView android:id="@+id/image1"
                android:layout_width="fill_parent" android:layout_height="wrap_content">
</LinearLayout>



***<LinearLayout android:orientation="vertical"
            android:layout_width="fill_parent" android:layout_height="fill_parent"
            android:background="#ffffff" android:id="@+id/videolistdisplay">
            <ScrollView android:id="@+id/scroll"
                android:layout_width="fill_parent" android:layout_height="wrap_content">
                <LinearLayout android:id="@+id/container"
                    android:orientation="vertical" android:layout_width="fill_parent"
                    android:layout_height="wrap_content"></LinearLayout>
            </ScrollView>***
        </LinearLayout>
    </LinearLayout>

问题是所有的布局都会正确地翻转，但videolistdisplay不会翻转

对于幻灯片效果，我写道：

public boolean onTouch(View arg0, MotionEvent arg1) {
    // Get the action that was done on this touch event
    switch (arg1.getAction())
    {
        case MotionEvent.ACTION_DOWN:
        {
            // store the X value when the user's finger was pressed down
            downXValue = arg1.getX();
            break;
        }

        case MotionEvent.ACTION_UP:
        {
            // Get the X value when the user released his/her finger
            float currentX = arg1.getX();            

            // going backwards: pushing stuff to the right
            if (downXValue < currentX)
            {
                // Get a reference to the ViewFlipper
                 ViewFlipper vf = (ViewFlipper) findViewById(R.id.details);
                 // Set the animation
                  vf.setAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));
                  // Flip!
                  vf.showPrevious();
            }

            // going forwards: pushing stuff to the left
            if (downXValue > currentX)
            {
                // Get a reference to the ViewFlipper
                ViewFlipper vf = (ViewFlipper) findViewById(R.id.details);
                 // Set the animation
                 vf.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));
                  // Flip!
                 vf.showNext();
            }
            break;
        }
    }

    // if you return false, these actions will not be recorded
    return true;
}

所有的布局都很好，但videolistdisplay布局只显示一次，我不能左右滑动。。请告诉我我哪里做错了

public boolean onTouch(View arg0, MotionEvent arg1) {
    // Get the action that was done on this touch event
    switch (arg1.getAction())
    {
        case MotionEvent.ACTION_DOWN:
        {
            // store the X value when the user's finger was pressed down
            downXValue = arg1.getX();
            break;
        }

        case MotionEvent.ACTION_UP:
        {
            // Get the X value when the user released his/her finger
            float currentX = arg1.getX();            

            // going backwards: pushing stuff to the right
            if (downXValue < currentX)
            {
                // Get a reference to the ViewFlipper
                 ViewFlipper vf = (ViewFlipper) findViewById(R.id.details);
                 // Set the animation
                  vf.setAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));
                  // Flip!
                  vf.showPrevious();
            }

            // going forwards: pushing stuff to the left
            if (downXValue > currentX)
            {
                // Get a reference to the ViewFlipper
                ViewFlipper vf = (ViewFlipper) findViewById(R.id.details);
                 // Set the animation
                 vf.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));
                  // Flip!
                 vf.showNext();
            }
            break;
        }
    }

    // if you return false, these actions will not be recorded
    return true;
}