结算页面、设置页面

app/src/main/java/com/sw/dualscreen/ext/CommonExt.kt

@@ -120,3 +120,15 @@ fun View.clickWithDebounce(delay: Long = 500, action: () -> Unit) {
         }
     }
 }
+
+fun View.visible() {
+    visibility = View.VISIBLE
+}
+
+fun View.invisible() {
+    visibility = View.INVISIBLE
+}
+
+fun View.gone() {
+    visibility = View.GONE
+}