添加计算缓存大小和清理缓存功能

lib/main.dart

@@ -23,6 +23,8 @@ void main() async {
   // WidgetsBinding widgetsBinding = WidgetsFlutterBinding.ensureInitialized();
   // FlutterNativeSplash.preserve(widgetsBinding: widgetsBinding);
   await Global.init();
+  PaintingBinding.instance.imageCache.maximumSize = 1000000;
+  PaintingBinding.instance.imageCache.maximumSizeBytes = 300 << 20; 
   Glassy().setConfig(GlassyConfig(
       radius: 16,
       backgroundColor: Color.fromARGB(255, 217, 217, 217),

lib/pages/my/controller.dart

@@ -4,19 +4,21 @@ import 'dart:io';
 
 import 'package:chart/common/apis/apis.dart';
 import 'package:chart/common/store/user.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_easyloading/flutter_easyloading.dart';
 import 'package:get/get.dart';
 import 'package:intl/intl.dart';
 import 'package:share_plus/share_plus.dart';
 import 'package:in_app_review/in_app_review.dart';
-
 import '../../common/routers/names.dart';
 import 'models.dart';
 
 class MyController extends GetxController {
-  var cacheSize = 16.43.obs;
+  var cacheSize = "0 B".obs;
   var userInfo = Rx<UserInfoData>(UserInfoData(username: "未登录"));
   var expireInfo = "--".obs;
+
+
   @override
   void onInit() {
     // TODO: implement onInit
@@ -26,8 +28,31 @@ class MyController extends GetxController {
     ever(UserStore.to.loginDidChange, (didChange) {
       requestUserInfo();
     });
+    cacheSize.value = getAllSizeOfCacheImages();
+  }
+  
+  //读取图片缓存大小
+  String getAllSizeOfCacheImages(){
+    ImageCache? imageCache = PaintingBinding.instance.imageCache;
+    String cacheSizeStr = '0 kb';
+    int byte = imageCache.currentSizeBytes;
+    if(byte >= 0 && byte < 1024) {
+      cacheSizeStr = '$byte B';
+    } else if(byte >= 1024 && byte < 1024 * 1024) {
+      double size = (byte * 1.0 / 1024);
+      String sizeStr = size.toStringAsFixed(2);
+      cacheSizeStr = '$sizeStr KB';
+    } else {
+      double size = (byte * 1.0 / 1024) / 1024;
+      String sizeStr = size.toStringAsFixed(2);
+      cacheSizeStr = '$sizeStr MB';
+    }
+    return cacheSizeStr;
   }
 
+  refreshCacheShow() {
+    cacheSize.value = getAllSizeOfCacheImages();
+  }
 
   goShare() async {
     await Share.shareWithResult(
@@ -44,9 +69,15 @@ class MyController extends GetxController {
   }
 
   goClearCache() {
-    cacheSize.value = 0.0;
+    if (cacheSize.value == "0 B") {
+      EasyLoading.showToast("已经清理");
+    } else {
+      ImageCache imageCache = PaintingBinding.instance.imageCache;
+      imageCache.clear();
+      cacheSize.value = getAllSizeOfCacheImages();
       EasyLoading.showSuccess("清理成功");
     }
+  }
 
   void goPay() {
     if (UserStore.to.isLogin) {

lib/pages/my/view.dart

@@ -76,7 +76,8 @@ class MyPage extends GetView<MyController> {
           Expanded(
             child: InkWell(
               onTap: () {
-                Get.toNamed(AppRoutes.MY_WORK, arguments: {"operator": "work"});
+                Get.toNamed(AppRoutes.MY_WORK, arguments: {"operator": "work"})
+                ?.then((value) => controller.refreshCacheShow());
               },
               child: Column(
                 children: [
@@ -107,7 +108,8 @@ class MyPage extends GetView<MyController> {
           Expanded(
             child: InkWell(
               onTap: () {
-                Get.toNamed(AppRoutes.MY_WORK, arguments: {"operator": "collect"});
+                Get.toNamed(AppRoutes.MY_WORK, arguments: {"operator": "collect"})
+                ?.then((value) => controller.refreshCacheShow());
               },
               child: Column(
                 children: [
@@ -306,7 +308,7 @@ class MyPage extends GetView<MyController> {
             hasBottomLine: false,
             rightItem: Container(
               padding: const EdgeInsets.fromLTRB(0, 0, 10, 0),
-              child: Obx(() => Text("${controller.cacheSize.value}MB")),
+              child: Obx(() => Text(controller.cacheSize.value)),
             ),
             onClick: () {
               controller.goClearCache();