[core] Fix #1013 (#1014)

Co-authored-by: vvb2060 <vvb2060@gmail.com>

core/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java

@@ -50,29 +50,32 @@ class ConfigFileManager {
         }
     }
 
+    static void deleteFolderIfExists(Path target) throws IOException {
+        if (!Files.exists(target)) return;
+        Files.walkFileTree(target, new SimpleFileVisitor<>() {
+            @Override
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+                    throws IOException {
+                Files.delete(file);
+                return FileVisitResult.CONTINUE;
+            }
+
+            @Override
+            public FileVisitResult postVisitDirectory(Path dir, IOException e)
+                    throws IOException {
+                if (e == null) {
+                    Files.delete(dir);
+                    return FileVisitResult.CONTINUE;
+                } else {
+                    throw e;
+                }
+            }
+        });
+    }
+
     private static void moveFolderIfExists(Path source, Path target) throws IOException {
         if (!Files.exists(source)) return;
-        if (Files.exists(target)) {
+        deleteFolderIfExists(target);
-            Files.walkFileTree(target, new SimpleFileVisitor<>() {
-                @Override
-                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
-                        throws IOException {
-                    Files.delete(file);
-                    return FileVisitResult.CONTINUE;
-                }
-
-                @Override
-                public FileVisitResult postVisitDirectory(Path dir, IOException e)
-                        throws IOException {
-                    if (e == null) {
-                        Files.delete(dir);
-                        return FileVisitResult.CONTINUE;
-                    } else {
-                        throw e;
-                    }
-                }
-            });
-        }
         Files.move(source, target);
     }
 

core/src/main/java/org/lsposed/lspd/service/ConfigManager.java

@@ -736,6 +736,13 @@ public class ConfigManager {
             db.setTransactionSuccessful();
             db.endTransaction();
         }
+        try {
+            for (var user : UserService.getUsers()) {
+                removeModulePrefs(user.id, packageName);
+            }
+        } catch (Throwable e) {
+            Log.w(TAG, "remove module prefs for " + packageName);
+        }
         return true;
     }
 
@@ -749,7 +756,13 @@ public class ConfigManager {
             db.setTransactionSuccessful();
             db.endTransaction();
         }
-        return true;
+        try {
+            removeModulePrefs(module.userId, module.packageName);
+            return true;
+        } catch (IOException e) {
+            Log.w(TAG, "removeModulePrefs", e);
+            return false;
+        }
     }
 
     public boolean disableModule(String packageName) {
@@ -924,6 +937,12 @@ public class ConfigManager {
         }
     }
 
+    private void removeModulePrefs(int uid, String packageName) throws IOException {
+        if (packageName == null) return;
+        var path = Paths.get(getPrefsPath(packageName, uid));
+        ConfigFileManager.deleteFolderIfExists(path);
+    }
+
     public String getManagerPackageName() {
         return manager;
     }