diff --git a/app/src/main/java/com/ttstd/dialer/manager/AppManager.java b/app/src/main/java/com/ttstd/dialer/manager/AppManager.java
index d25cbe1..56accbe 100644
--- a/app/src/main/java/com/ttstd/dialer/manager/AppManager.java
+++ b/app/src/main/java/com/ttstd/dialer/manager/AppManager.java
@@ -22,20 +22,23 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Objects;
-import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.function.Consumer;
-import java.util.function.Function;
-import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 
 public class AppManager {
     private static final String TAG = "AppManager";
+    // 步骤常量定义，便于回调和日志统一管理
+    private static final String STEP_FIRST_INIT = "首次初始化应用数据";
+    private static final String STEP_REMOVE_UNINSTALLED = "移除未安装应用";
+    private static final String STEP_ADD_NEW_APPS = "添加新安装应用";
+    private static final String STEP_UPDATE_POSITION = "更新应用位置";
+    private static final int TOTAL_STEPS_NORMAL = 3; // 正常流程总步骤
+    private static final int TOTAL_STEPS_FIRST = 2;  // 首次初始化总步骤
 
     private MMKV mMMKV = MMKV.mmkvWithID(CommonConfig.MMKV_ID, MMKV.MULTI_PROCESS_MODE);
 
@@ -57,7 +60,13 @@ public class AppManager {
     }
 
     public void addProgressCallback(ProgressCallback progressCallback) {
-        mProgressCallbacks.add(progressCallback);
+        if (progressCallback != null) {
+            mProgressCallbacks.add(progressCallback);
+        }
+    }
+
+    public void removeProgressCallback(ProgressCallback progressCallback) {
+        mProgressCallbacks.remove(progressCallback);
     }
 
     public static final List<String> DEFAULT_APP_PACKAGES = new ArrayList<String>() {{
@@ -88,73 +97,124 @@ public class AppManager {
         executeAppListProcessing();
     }
 
+    // 通知进度回调
+    private void notifyProgress(String step, int current, int total) {
+        mProgressCallbacks.forEach(callback -> callback.onProgress(step, current, total));
+    }
 
-    // 异步执行方法
+    // 通知完成回调
+    private void notifyCompleted(boolean success, String message) {
+        mProgressCallbacks.forEach(callback -> callback.onCompleted(success, message));
+    }
+
+    // 异步执行应用列表处理流程
     public void executeAppListProcessing() {
         CompletableFuture
                 .supplyAsync(this::getAllDesktopSortApps, ASYNC_EXECUTOR)
-                .thenComposeAsync(desktopSortApps -> {
-                    // 判断获取的应用列表是否为空
-                    if (desktopSortApps == null || desktopSortApps.isEmpty()) {
-                        Log.i("AppListProcessor", "检测到桌面应用列表为空，直接插入新应用数据");
-                        return processNewApps()
-                                .thenComposeAsync(unused -> updatePosition(), ASYNC_EXECUTOR);
+                .thenComposeAsync(desktopApps -> {
+                    // 根据应用列表是否为空，选择不同处理流程
+                    if (desktopApps.isEmpty()) {
+                        // 首次初始化流程：首次数据加载 -> 更新位置
+                        return processFirstTimeApps()
+                                .thenComposeAsync(unused -> {
+                                    notifyProgress(STEP_UPDATE_POSITION, 2, TOTAL_STEPS_FIRST);
+                                    return updatePosition();
+                                }, ASYNC_EXECUTOR);
                     } else {
-                        return processUninstalledApps(desktopSortApps)
-                                .thenComposeAsync(unused -> processNewApps(), ASYNC_EXECUTOR)
-                                .thenComposeAsync(unused -> updatePosition(), ASYNC_EXECUTOR);
+                        // 正常流程：移除未安装 -> 添加新应用 -> 更新位置
+                        return processUninstalledApps(desktopApps)
+                                .thenComposeAsync(unused -> {
+                                    notifyProgress(STEP_ADD_NEW_APPS, 2, TOTAL_STEPS_NORMAL);
+                                    return processNewApps();
+                                }, ASYNC_EXECUTOR)
+                                .thenComposeAsync(unused -> {
+                                    notifyProgress(STEP_UPDATE_POSITION, 3, TOTAL_STEPS_NORMAL);
+                                    return updatePosition();
+                                }, ASYNC_EXECUTOR);
                     }
                 }, ASYNC_EXECUTOR)
-                .thenComposeAsync(unused -> processNewApps(), ASYNC_EXECUTOR)
+                .thenRun(() -> notifyCompleted(true, "应用列表处理完成"))
                 .exceptionally(throwable -> {
-                    // 统一异常处理
-                    Log.e("AppListProcessor", "异步处理失败", throwable);
+                    Log.e(TAG, "异步处理失败", throwable);
+                    notifyCompleted(false, "处理失败: " + throwable.getMessage());
                     return null;
                 });
     }
 
-    // 第一步：获取所有桌面应用（增加空值安全处理）
+    // 第一步：获取所有桌面应用（空值安全处理）
     private List<DesktopSortApp> getAllDesktopSortApps() {
         try {
             List<DesktopSortApp> result = mAppRepository.getAllApp();
             return result != null ? result : Collections.emptyList();
         } catch (Exception e) {
-            Log.e("AppListProcessor", "获取桌面应用列表失败", e);
+            Log.e(TAG, "获取桌面应用列表失败", e);
             return Collections.emptyList();
         }
     }
 
-    private Optional<List<DesktopSortApp>> getAllDesktopSortAppsSafe() {
-        try {
-            return Optional.ofNullable(mAppRepository.getAllApp())
-                    .filter(list -> !list.isEmpty());
-        } catch (Exception e) {
-            Log.e("AppListProcessor", "获取应用列表失败", e);
-            return Optional.empty();
-        }
+    // 首次初始化应用数据（针对首次获取为空的场景）
+    private CompletableFuture<Void> processFirstTimeApps() {
+        return CompletableFuture.runAsync(() -> {
+            notifyProgress(STEP_FIRST_INIT, 1, TOTAL_STEPS_FIRST);
+            Log.i(TAG, "进入首次应用数据初始化流程");
+
+            try {
+                // 获取所有可启动应用
+                List<ResolveInfo> allLauncherApps = ApkUtils.getAllLauncherResolveInfo(mContext);
+                if (allLauncherApps.isEmpty()) {
+                    Log.w(TAG, "未获取到任何可启动应用，无法完成首次初始化");
+                    return;
+                }
+
+                List<DesktopSortApp> allFirstApps = allLauncherApps.stream()
+                        .filter(Objects::nonNull)
+                        .map(this::resolveInfoToDesktopApp)
+                        .filter(Objects::nonNull)
+                        .sorted((o1, o2) -> Boolean.compare(ApkUtils.isSystemApp(mContext, o1.getPackageName()), ApkUtils.isSystemApp(mContext, o2.getPackageName())))
+                        .sorted(getAppComparator())
+                        .collect(Collectors.toList());
+
+                IntStream.range(0, allFirstApps.size())
+                        .forEach(index -> allFirstApps.get(index).setPosition(index));
+
+                // 批量插入首次数据
+                allFirstApps.forEach(app -> {
+                    try {
+                        mAppRepository.insert(app);
+                    } catch (Exception e) {
+                        Log.e(TAG, "首次初始化插入应用失败: " + app.getPackageName(), e);
+                    }
+                });
+
+                Log.i(TAG, "首次初始化完成，插入默认应用: " + allFirstApps.size() + " 个");
+            } catch (Exception e) {
+                Log.e(TAG, "首次应用数据初始化失败", e);
+                throw new RuntimeException("首次初始化失败", e); // 抛出异常触发回调
+            }
+        }, ASYNC_EXECUTOR);
     }
 
-    // 第二步：处理未安装的应用（删除操作） - 增加空值检查
+    // 处理未安装的应用（删除操作）
     private CompletableFuture<Void> processUninstalledApps(List<DesktopSortApp> desktopSortApps) {
         return CompletableFuture.runAsync(() -> {
-            if (desktopSortApps == null || desktopSortApps.isEmpty()) {
-                Log.w("AppListProcessor", "桌面应用列表为空，跳过删除处理");
+            notifyProgress(STEP_REMOVE_UNINSTALLED, 1, TOTAL_STEPS_NORMAL);
+            if (desktopSortApps.isEmpty()) {
+                Log.w(TAG, "桌面应用列表为空，跳过删除处理");
                 return;
             }
 
             List<Integer> ids = desktopSortApps.stream()
-                    .filter(desktopSortApp -> desktopSortApp != null &&
-                            !ApkUtils.isInstalled(mContext, desktopSortApp.getPackageName()))
-                    .map(desktopSortApp -> {
+                    .filter(Objects::nonNull)
+                    .filter(app -> !ApkUtils.isInstalled(mContext, app.getPackageName()))
+                    .map(app -> {
                         try {
-                            return mAppRepository.getIdByPackageAndClass(
-                                    desktopSortApp.getPackageName(), desktopSortApp.getClassName());
+                            return mAppRepository.getIdByPackageAndClass(app.getPackageName(), app.getClassName());
                         } catch (Exception e) {
-                            Log.e("AppListProcessor", "获取应用ID失败: " + desktopSortApp.getPackageName(), e);
-                            return -1; // 返回无效ID，后续过滤掉
+                            Log.e(TAG, "获取应用ID失败: " + app.getPackageName(), e);
+                            return -1;
                         }
                     })
-                    .filter(id -> id > 0) // 过滤掉无效ID
+                    .filter(id -> id > 0)
                     .collect(Collectors.toList());
 
             if (!ids.isEmpty()) {
@@ -162,232 +222,160 @@ public class AppManager {
                     try {
                         mAppRepository.deleteById(id);
                     } catch (Exception e) {
-                        Log.e("AppListProcessor", "删除应用失败, ID: " + id, e);
+                        Log.e(TAG, "删除应用失败, ID: " + id, e);
                     }
                 });
-                Log.i("AppListProcessor", "成功删除 " + ids.size() + " 个未安装应用");
+                Log.i(TAG, "成功删除 " + ids.size() + " 个未安装应用");
             }
         }, ASYNC_EXECUTOR);
     }
 
-    // 第三步：处理新应用（插入操作） - 增加空值和异常处理
+    // 处理新安装的应用（插入操作）- 非首次场景
     private CompletableFuture<Void> processNewApps() {
         return CompletableFuture.runAsync(() -> {
             try {
                 List<ResolveInfo> resolveInfos = ApkUtils.getAllLauncherResolveInfo(mContext);
                 if (resolveInfos.isEmpty()) {
-                    Log.w("AppListProcessor", "未获取到启动器应用列表");
+                    Log.w(TAG, "未获取到启动器应用列表，跳过新应用处理");
                     return;
                 }
 
-                List<DesktopSortApp> appList = resolveInfos.stream()
+                List<DesktopSortApp> newApps = resolveInfos.stream()
                         .filter(Objects::nonNull)
-                        .map(resolveInfo -> {
-                            try {
-                                String packageName = resolveInfo.activityInfo.packageName;
-                                String className = resolveInfo.activityInfo.name;
-                                ComponentName componentName = new ComponentName(packageName, className);
-                                return new DesktopSortApp(mContext, componentName);
-                            } catch (Exception e) {
-                                Log.e("AppListProcessor", "创建DesktopSortApp失败", e);
-                                return null;
-                            }
-                        })
+                        .map(this::resolveInfoToDesktopApp)
                         .filter(Objects::nonNull)
-                        .sorted(new Comparator<DesktopSortApp>() {
-                            @Override
-                            public int compare(DesktopSortApp o1, DesktopSortApp o2) {
-                                return Collator.getInstance(Locale.CHINESE).compare(o1.getLabel(), o2.getLabel());
-                            }
-                        })
+                        .filter(app -> ApkUtils.isInstalled(mContext, app.getPackageName()))
+                        .filter(app -> !isAppExists(app)) // 过滤已存在的应用
+                        .sorted(getAppComparator())
                         .collect(Collectors.toList());
 
-                List<DesktopSortApp> filterApp = appList.stream()
-                        .filter(desktopSortApp -> ApkUtils.isInstalled(mContext, desktopSortApp.getPackageName()))
-                        .filter(desktopSortApp -> {
-                            try {
-                                return mAppRepository.checkAppInfoExists(
-                                        desktopSortApp.getPackageName(), desktopSortApp.getClassName()) <= 0;
-                            } catch (Exception e) {
-                                Log.e("AppListProcessor", "检查应用存在性失败", e);
-                                return false;
-                            }
-                        })
-                        .collect(Collectors.toList());
-
-                if (!filterApp.isEmpty()) {
-                    filterApp.forEach(desktopSortApp -> {
-                        desktopSortApp.setPosition(mAppRepository.getTotalCount());
+                if (!newApps.isEmpty()) {
+                    newApps.forEach(app -> app.setPosition(mAppRepository.getTotalCount()));
+                    newApps.forEach(app -> {
                         try {
-                            mAppRepository.insert(desktopSortApp);
+                            mAppRepository.insert(app);
                         } catch (Exception e) {
-                            Log.e("AppListProcessor", "插入应用失败: " + desktopSortApp.getPackageName(), e);
+                            Log.e(TAG, "插入新应用失败: " + app.getPackageName(), e);
                         }
                     });
-                    Log.i("AppListProcessor", "成功插入 " + filterApp.size() + " 个新应用");
+                    Log.i(TAG, "成功插入 " + newApps.size() + " 个新应用");
                 } else {
-                    Log.i("AppListProcessor", "没有需要插入的新应用");
+                    Log.i(TAG, "没有需要插入的新应用");
                 }
             } catch (Exception e) {
-                Log.e("AppListProcessor", "处理新应用时发生异常", e);
+                Log.e(TAG, "处理新应用时发生异常", e);
+                throw new RuntimeException("新应用处理失败", e);
             }
         }, ASYNC_EXECUTOR);
     }
 
-    // 第四步：更新应用位置（您提供的方法优化）
+    // 更新应用位置
     private CompletableFuture<Void> updatePosition() {
         return CompletableFuture.runAsync(() -> {
             try {
                 List<DesktopSortApp> desktopSortApps = getAllDesktopSortApps();
-                if (desktopSortApps == null || desktopSortApps.isEmpty()) {
-                    Log.w("AppListProcessor", "无应用数据，跳过位置更新");
+                if (desktopSortApps.isEmpty()) {
+                    Log.w(TAG, "无应用数据，跳过位置更新");
                     return;
                 }
 
-                // 使用Lambda简化代码
                 List<DesktopSortApp> sortedApps = desktopSortApps.stream()
                         .filter(Objects::nonNull)
-                        .sorted((o1, o2) -> Integer.compare(o1.getPosition(), o2.getPosition()))
+                        .sorted(Comparator.comparingInt(DesktopSortApp::getPosition))
                         .collect(Collectors.toList());
 
-                // 批量更新位置
                 IntStream.range(0, sortedApps.size())
                         .forEach(index -> {
-                            DesktopSortApp desktopSortApp = sortedApps.get(index);
-                            desktopSortApp.setPosition(index);
+                            DesktopSortApp app = sortedApps.get(index);
+                            app.setPosition(index);
                             try {
-                                mAppRepository.update(desktopSortApp);
+                                mAppRepository.update(app);
                             } catch (Exception e) {
-                                Log.e("AppListProcessor", "更新应用位置失败: " + desktopSortApp.getPackageName(), e);
+                                Log.e(TAG, "更新应用位置失败: " + app.getPackageName(), e);
                             }
                         });
-                Log.i("AppListProcessor", "成功更新 " + sortedApps.size() + " 个应用的位置");
+                Log.i(TAG, "成功更新 " + sortedApps.size() + " 个应用的位置");
             } catch (Exception e) {
-                Log.e("AppListProcessor", "更新应用位置时发生异常", e);
+                Log.e(TAG, "更新应用位置时发生异常", e);
+                throw new RuntimeException("位置更新失败", e);
             }
         }, ASYNC_EXECUTOR);
     }
 
-    public void updateApp(String packageName) {
-        List<ResolveInfo> resolveInfos = ApkUtils.getResolveInfoByPackageName(mContext, packageName);
-        if (!resolveInfos.isEmpty()) {
-            resolveInfos.stream().map(new Function<ResolveInfo, DesktopSortApp>() {
-                @Override
-                public DesktopSortApp apply(ResolveInfo resolveInfo) {
-                    String packageName = resolveInfo.activityInfo.packageName;
-                    String className = resolveInfo.activityInfo.name;
-                    ComponentName componentName = new ComponentName(packageName, className);
-                    return new DesktopSortApp(mContext, componentName);
-                }
-            }).filter(new Predicate<DesktopSortApp>() {
-                @Override
-                public boolean test(DesktopSortApp desktopSortApp) {
-                    return mAppRepository.checkAppInfoExists(desktopSortApp.getPackageName(), desktopSortApp.getClassName()) <= 0;
-                }
-            }).forEach(new Consumer<DesktopSortApp>() {
-                @Override
-                public void accept(DesktopSortApp desktopSortApp) {
-                    desktopSortApp.setPosition(mAppRepository.getTotalCount());
-                    mAppRepository.insert(desktopSortApp);
-                }
-            });
+    // 工具方法：ResolveInfo转换为DesktopSortApp
+    private DesktopSortApp resolveInfoToDesktopApp(ResolveInfo resolveInfo) {
+        ComponentName component = new ComponentName(
+                resolveInfo.activityInfo.packageName,
+                resolveInfo.activityInfo.name
+        );
+        return new DesktopSortApp(mContext, component);
+    }
+
+    // 工具方法：检查应用是否已存在
+    private boolean isAppExists(DesktopSortApp app) {
+        try {
+            return mAppRepository.checkAppInfoExists(app.getPackageName(), app.getClassName()) > 0;
+        } catch (Exception e) {
+            Log.e(TAG, "检查应用存在性失败: " + app.getPackageName(), e);
+            return false;
         }
     }
 
-    public void getAllApp() {
-        List<DesktopSortApp> desktopSortApps = mAppRepository.getAllApp();
-        List<Integer> ids = desktopSortApps.stream().filter(new Predicate<DesktopSortApp>() {
-            @Override
-            public boolean test(DesktopSortApp desktopSortApp) {
-                return !ApkUtils.isInstalled(mContext, desktopSortApp.getPackageName());
-            }
-        }).map(new java.util.function.Function<DesktopSortApp, Integer>() {
-            @Override
-            public Integer apply(DesktopSortApp desktopSortApp) {
-                return mAppRepository.getIdByPackageAndClass(desktopSortApp.getPackageName(), desktopSortApp.getClassName());
-            }
-        }).collect(Collectors.toList());
-        ids.stream().forEach(new Consumer<Integer>() {
-            @Override
-            public void accept(Integer integer) {
-                mAppRepository.deleteById(integer);
-            }
-        });
+    // 工具方法：获取应用排序器（统一排序逻辑）
+    private Comparator<DesktopSortApp> getAppComparator() {
+        return Comparator.comparing(DesktopSortApp::getLabel, Collator.getInstance(Locale.CHINESE));
+    }
 
-        List<ResolveInfo> resolveInfos = ApkUtils.getAllLauncherResolveInfo(mContext);
-        List<DesktopSortApp> appList = resolveInfos.stream().map(new Function<ResolveInfo, ComponentName>() {
-            @Override
-            public ComponentName apply(ResolveInfo resolveInfo) {
-                String packageName = resolveInfo.activityInfo.packageName;
-                String className = resolveInfo.activityInfo.name;
-                ComponentName componentName = new ComponentName(packageName, className);
-                return componentName;
-            }
-        }).map(new Function<ComponentName, DesktopSortApp>() {
-            @Override
-            public DesktopSortApp apply(ComponentName componentName) {
-                DesktopSortApp desktopSortApp = new DesktopSortApp(mContext, componentName);
-                return desktopSortApp;
-            }
-        }).collect(Collectors.toList());
-        List<DesktopSortApp> filterApp = appList.stream().filter(new Predicate<DesktopSortApp>() {
-            @Override
-            public boolean test(DesktopSortApp desktopSortApp) {
-                return ApkUtils.isInstalled(mContext, desktopSortApp.getPackageName());
-            }
-        }).filter(new Predicate<DesktopSortApp>() {
-            @Override
-            public boolean test(DesktopSortApp desktopSortApp) {
-                return mAppRepository.checkAppInfoExists(desktopSortApp.getPackageName(), desktopSortApp.getClassName()) > 0;
-            }
-        }).collect(Collectors.toList());
+    public void updateApp(String packageName) {
+        List<ResolveInfo> resolveInfos = ApkUtils.getResolveInfoByPackageName(mContext, packageName);
+        if (resolveInfos.isEmpty()) return;
 
-        filterApp.stream().forEach(new Consumer<DesktopSortApp>() {
-            @Override
-            public void accept(DesktopSortApp desktopSortApp) {
-                mAppRepository.insert(desktopSortApp);
+        resolveInfos.stream()
+                .map(this::resolveInfoToDesktopApp)
+                .filter(Objects::nonNull)
+                .filter(app -> !isAppExists(app))
+                .forEach(app -> {
+                    app.setPosition(mAppRepository.getTotalCount());
+                    try {
+                        mAppRepository.insert(app);
+                    } catch (Exception e) {
+                        Log.e(TAG, "更新应用插入失败: " + app.getPackageName(), e);
+                    }
+                });
+    }
+
+    // 重构getAllApp方法，复用现有处理逻辑
+    public void refreshAllApps() {
+        CompletableFuture.runAsync(() -> {
+            List<DesktopSortApp> allApps = getAllDesktopSortApps();
+            if (allApps.isEmpty()) {
+                processFirstTimeApps().join();
+            } else {
+                processUninstalledApps(allApps).join();
+                processNewApps().join();
             }
-        });
-
-
+            updatePosition().join();
+        }, ASYNC_EXECUTOR);
     }
 
     public String getDefaultAppList() {
-        PackageManager packageManager = mContext.getPackageManager();
+        PackageManager pm = mContext.getPackageManager();
         List<ResolveInfo> resolveInfos = ApkUtils.getAllLauncherResolveInfo(mContext);
-        List<ResolveInfo> filter = resolveInfos.stream().filter(new Predicate<ResolveInfo>() {
-            @Override
-            public boolean test(ResolveInfo resolveInfo) {
-                return DEFAULT_APP_PACKAGES.contains(resolveInfo.activityInfo.packageName);
-            }
-        }).sorted(new Comparator<ResolveInfo>() {
-            @Override
-            public int compare(ResolveInfo o1, ResolveInfo o2) {
-                return Collator.getInstance(Locale.CHINESE).compare(o1.activityInfo.loadLabel(packageManager), o2.activityInfo.loadLabel(packageManager));
-            }
-        }).collect(Collectors.toList());
 
-        List<DesktopSortApp> desktopSortApps = filter.stream().map(new Function<ResolveInfo, DesktopSortApp>() {
-            @Override
-            public DesktopSortApp apply(ResolveInfo resolveInfo) {
-                ComponentName componentName = new ComponentName(resolveInfo.activityInfo.packageName,
-                        resolveInfo.activityInfo.name);
-                return new DesktopSortApp(mContext, componentName);
-            }
-        }).sorted(new Comparator<DesktopSortApp>() {
-            @Override
-            public int compare(DesktopSortApp o1, DesktopSortApp o2) {
-                return Boolean.compare(ApkUtils.isSystemApp(mContext, o2.getPackageName()), ApkUtils.isSystemApp(mContext, o1.getPackageName()));
-            }
-        }).collect(Collectors.toCollection(LinkedList::new));
+        List<DesktopSortApp> defaultApps = resolveInfos.stream()
+                .filter(ri -> DEFAULT_APP_PACKAGES.contains(ri.activityInfo.packageName))
+                .sorted((o1, o2) -> Collator.getInstance(Locale.CHINESE)
+                        .compare(o1.activityInfo.loadLabel(pm), o2.activityInfo.loadLabel(pm)))
+                .map(ri -> new ComponentName(ri.activityInfo.packageName, ri.activityInfo.name))
+                .map(component -> new DesktopSortApp(mContext, component))
+                .sorted((a, b) -> Boolean.compare(
+                        ApkUtils.isSystemApp(mContext, b.getPackageName()),
+                        ApkUtils.isSystemApp(mContext, a.getPackageName())))
+                .collect(Collectors.toCollection(LinkedList::new));
 
-        for (int i = 0; i < desktopSortApps.size(); i++) {
-            DesktopSortApp desktopSortApp = desktopSortApps.get(i);
-            desktopSortApp.setPosition(i);
-        }
+        IntStream.range(0, defaultApps.size())
+                .forEach(i -> defaultApps.get(i).setPosition(i));
 
-        return GsonUtils.toJSONString(desktopSortApps);
+        return GsonUtils.toJSONString(defaultApps);
     }
-
-
-}
+}
\ No newline at end of file