Android TextSwitcher couldn't wrap content width after set text

I am using TextSwitcher to put fade in - fade out animation when I set text. But having some problems with wrapping the content by its width when the text is changed.

Following is my TextSwitched xml:

<TextSwitcher
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_alignParentRight="true"
                            android:layout_centerVertical="true"
                            android:layout_marginLeft="5dp"
                            android:layout_marginRight="5dp"
                            android:background="#ffffff"
                            android:paddingBottom="1dp"
                            android:paddingLeft="7dp"
                            android:paddingRight="10dp"
                            android:paddingTop="1dp" >

                            <TextView
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content"
                                android:ellipsize="end"
                                android:maxLines="1"
                                android:scrollHorizontally="true"
                                android:textAppearance="?android:attr/textAppearanceSmall"
                                android:textColor="@android:color/white" />

                            <TextView
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content"
                                android:ellipsize="end"
                                android:maxLines="1"
                                android:scrollHorizontally="true"
                                android:textAppearance="?android:attr/textAppearanceSmall"
                                android:textColor="@android:color/white" />
                        </TextSwitcher&