去掉ui

app/src/main/res/layout/activity_home_web.xml

@@ -65,7 +65,7 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toBottomOf="@id/print"
         android:text="拍照"
-        />
+        android:visibility="gone"/>
 
     <Button
         android:id="@+id/start_scan"