1、SearchAppBar：①增加属性，leftWidget(搜索框左侧自定义widget) ②修改右侧搜索按钮展示隐藏判断

example/android/build.gradle

@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

lib/widget/search_app_bar.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_clx_base/common/gaps.dart';
-import 'package:flutter_clx_base/utils/keyboard_utils.dart';
+import 'package:flutter_clx_base/flutter_clx_base.dart';
 import 'package:flutter_clx_base/utils/string_util.dart';
-import 'package:flutter_clx_base/utils/toast_util.dart';
 import 'package:keyboard_actions/keyboard_actions.dart';
 
 class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
@@ -21,6 +19,7 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
   final Function? onFocusListener;
   final String? rightText;
   final Function? onRightBtnCallback;
+  final Widget? leftWidget;
 
   const SearchAppBar({
     Key? key,
@@ -39,6 +38,7 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
     this.onRightBtnCallback,
     this.searchIconColor,
     this.searchIconSize,
+    this.leftWidget,
   }) : super(key: key);
 
   @override
@@ -86,6 +86,7 @@ class _SearchAppBarState extends State<SearchAppBar> {
                 child: Row(
                   children: <Widget>[
                     hGap10,
+                    widget.leftWidget ??
                         Icon(
                           Icons.search,
                           color: widget.searchIconColor ?? Colors.grey.shade300,
@@ -122,7 +123,9 @@ class _SearchAppBarState extends State<SearchAppBar> {
                 ),
               ),
             ),
-            InkWell(
+            Offstage(
+              offstage: widget.rightText.isNullOrEmpty(),
+              child: InkWell(
                 onTap: () {
                   widget.onRightBtnCallback != null
                       ? widget.onRightBtnCallback?.call()
@@ -135,10 +138,12 @@ class _SearchAppBarState extends State<SearchAppBar> {
                   child: Text(
                     widget.rightText ?? "搜索",
                     style: TextStyle(
-                      color: widget.searchTextColor ?? const Color(0xFFFFFFFF),
+                        color:
+                            widget.searchTextColor ?? const Color(0xFFFFFFFF),
                         fontSize: 14.0),
                   ),
                 ),
+              ),
             )
           ],
         ),