1111

lib/app_upgrade_plugin_method_channel.dart

@@ -495,12 +495,23 @@ class MethodChannelAppUpgradePlugin extends AppUpgradePluginPlatform {
         return true;
       }
       debugPrint('当前APP没有上架当前设备对应的应用市场');
-      ScaffoldMessenger.of(context).showSnackBar(
+      if (context.mounted) {
-        SnackBar(
+        try {
-          content: Text('当前APP没有上架当前设备对应的应用市场'),
+          final scaffoldMessenger = ScaffoldMessenger.maybeOf(context);
-          duration: Duration(seconds: 2),
+          if (scaffoldMessenger != null) {
-        ),
+            scaffoldMessenger.showSnackBar(
-      );
+              SnackBar(
+                content: Text('当前APP没有上架当前设备对应的应用市场'),
+                duration: Duration(seconds: 2),
+              ),
+            );
+          } else {
+            debugPrint('提示（无Scaffold）: 当前APP没有上架当前设备对应的应用市场');
+          }
+        } catch (e) {
+          debugPrint('显示提示失败: $e');
+        }
+      }
       // Fluttertoast.showToast(msg: '当前APP没有上架当前设备对应的应用市场');
       return false;
     } catch (e) {

lib/app_upgrade_simple.dart

@@ -524,12 +524,31 @@ class AppUpgradeSimple {
     if (effectiveConfig.customToast != null) {
       effectiveConfig.customToast!(message);
     } else {
-      ScaffoldMessenger.of(context).showSnackBar(
+      // 检查 context 是否有效且有 Scaffold
-        SnackBar(
+      if (!context.mounted) {
-          content: Text(message),
+        debugPrint('Toast消息（context已卸载）: $message');
-          duration: Duration(seconds: 2),
+        return;
-        ),
+      }
-      );
+
+      try {
+        // 尝试获取 ScaffoldMessenger，如果失败则使用 debugPrint
+        final scaffoldMessenger = ScaffoldMessenger.maybeOf(context);
+        if (scaffoldMessenger != null) {
+          scaffoldMessenger.showSnackBar(
+            SnackBar(
+              content: Text(message),
+              duration: Duration(seconds: 2),
+            ),
+          );
+        } else {
+          // 如果没有 Scaffold，使用 debugPrint 作为后备方案
+          debugPrint('Toast消息（无Scaffold）: $message');
+        }
+      } catch (e) {
+        // 如果出现任何错误，使用 debugPrint 作为后备方案
+        debugPrint('显示Toast失败: $e');
+        debugPrint('Toast消息: $message');
+      }
     }
   }
 

lib/core/permission_helper.dart

@@ -267,9 +267,19 @@ class PermissionHelper {
           message = '未授予安装权限，无法完成更新。';
           break;
       }
-      ScaffoldMessenger.of(context).showSnackBar(
+      try {
-        SnackBar(content: Text(message)),
+        final scaffoldMessenger = ScaffoldMessenger.maybeOf(context);
-      );
+        if (scaffoldMessenger != null) {
+          scaffoldMessenger.showSnackBar(
+            SnackBar(content: Text(message)),
+          );
+        } else {
+          debugPrint('权限提示（无Scaffold）: $message');
+        }
+      } catch (e) {
+        debugPrint('显示权限提示失败: $e');
+        debugPrint('权限提示: $message');
+      }
     }
 
     return status == InstallPermissionStatus.granted;