1、SearchAppBar增加焦点回调，设置右侧按钮属性

lib/widget/search_app_bar.dart

@@ -15,6 +15,9 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
   final Color? inputTextColor;
   final Color? hintTextColor;
   final Color? searchTextColor;
+  final Function? onFocusListener;
+  final String? rightText;
+  final Function? onRightBtnCallback;
 
   const SearchAppBar({
     Key? key,
@@ -27,6 +30,9 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
     this.inputTextColor,
     this.hintTextColor,
     this.searchTextColor,
+    this.onFocusListener,
+    this.rightText,
+    this.onRightBtnCallback,
   }) : super(key: key);
 
   @override
@@ -37,14 +43,24 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
 }
 
 class _SearchAppBarState extends State<SearchAppBar> {
-  final searchInfoController = TextEditingController();
-  final searchFocusNode = FocusNode();
+  final _searchInfoController = TextEditingController();
+  final _searchFocusNode = FocusNode();
+
+  @override
+  void initState() {
+    _searchFocusNode.addListener(() {
+      if (widget.onFocusListener != null) {
+        widget.onFocusListener!(_searchFocusNode.hasFocus);
+      }
+    });
+    super.initState();
+  }
 
   @override
   Widget build(BuildContext context) {
     return KeyboardActions(
       config:
-          KeyBoardUtils.getKeyboardActionsConfig(context, [searchFocusNode]),
+          KeyBoardUtils.getKeyboardActionsConfig(context, [_searchFocusNode]),
       tapOutsideBehavior: TapOutsideBehavior.opaqueDismiss,
       child: AppBar(
         backgroundColor: widget.backgroundColor,
@@ -68,13 +84,13 @@ class _SearchAppBarState extends State<SearchAppBar> {
                     Expanded(
                       child: TextField(
                         maxLines: 1,
-                        focusNode: searchFocusNode,
+                        focusNode: _searchFocusNode,
                         style: TextStyle(
                             fontSize: 14,
                             color: widget.inputTextColor ??
                                 const Color(0xFF000000)),
                         textInputAction: TextInputAction.search,
-                        controller: searchInfoController,
+                        controller: _searchInfoController,
                         onSubmitted: (value) => _search(),
                         decoration: InputDecoration(
                           contentPadding: const EdgeInsets.symmetric(
@@ -96,12 +112,12 @@ class _SearchAppBarState extends State<SearchAppBar> {
               ),
             ),
             InkWell(
-              onTap: () => _search(),
+              onTap: () => widget.onRightBtnCallback ?? _search(),
               child: Container(
                 width: 60.0,
                 alignment: Alignment.center,
                 child: Text(
-                  "搜索",
+                  widget.rightText ?? "搜索",
                   style: TextStyle(
                       color: widget.searchTextColor ?? const Color(0xFFFFFFFF),
                       fontSize: 14.0),
@@ -116,7 +132,7 @@ class _SearchAppBarState extends State<SearchAppBar> {
 
   /// 校验
   bool _checkInfo() {
-    if (isNullOrEmpty(getControllerString(searchInfoController))) {
+    if (isNullOrEmpty(getControllerString(_searchInfoController))) {
       ToastUtil.showToast("请输入搜索内容");
       return false;
     }
@@ -128,7 +144,7 @@ class _SearchAppBarState extends State<SearchAppBar> {
     if (_checkInfo()) {
       KeyBoardUtils.hideKeyboard();
       if (widget.onCallback != null) {
-        widget.onCallback!(getControllerString(searchInfoController));
+        widget.onCallback!(getControllerString(_searchInfoController));
       }
     }
   }