android-仿QQtab(2)

                    android:layout_height="wrap_content"  
                    android:src="@drawable/tab1" 
                    android:layout_centerInParent="true" 
                    /> 
            </RelativeLayout> 
            <RelativeLayout  
                android:id="@+id/layout2" 
                android:layout_width="fill_parent"  
                android:layout_height="wrap_content"  
                android:layout_weight="1.0" 
                android:layout_gravity="center_vertical" 
                > 
                <ImageView 
                    android:id="@+id/tab2" 
                    android:layout_width="wrap_content"  
                    android:layout_height="wrap_content"  
                    android:src="@drawable/tab2" 
                    android:layout_centerInParent="true" 
                    /> 
            </RelativeLayout> 
            <RelativeLayout  
                android:id="@+id/layout3"