How to programmatically add view in ViewFlipper

I have following main layout:

<LinearLayout android:id="@+id/LinearLayout01" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical">

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

        <!-- Here I want to add my views which are located in separated xml files. -->

        </ViewFlipper>

</LinearLayout>

Here is example of my view:

view_url.xml

<LinearLayout android:id="@+id/LinearLayout01" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:gravity="center">
 <EditText android:text="@+id/EditText01" 
  android:id="@+id/EditText01" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content"/>
 <Button android:layout_width="wrap_content" 
                android:layout_height="wrap_content" 
                android:id="@+id/btnGenerate" 
                android:text="Generate"/>
</LinearLayout>

view_text.xml

<LinearLayout android:id="@+id/LinearLayout01" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical">

 <EditText android:text="@+id/EditText01" 
  android:id="@+id/EditText01" 
  android:layout_height="wrap_content" 
  android:contentDescription="Enter your text here" 
  android:layout_width="fill_parent" 
  android:height="200dp"/>
</LinearLayout>

I am trying to add views:

viewstack = (ViewFlipper) findViewById(R.id.viewstack);));

View viewText = (View) findViewById(R.layout.view_text);
viewstack.addView(viewText)