diff --git a/catvod/src/main/java/com/github/catvod/utils/Prefers.java b/catvod/src/main/java/com/github/catvod/utils/Prefers.java
index faaf890d1..0d070c8db 100644
--- a/catvod/src/main/java/com/github/catvod/utils/Prefers.java
+++ b/catvod/src/main/java/com/github/catvod/utils/Prefers.java
@@ -20,23 +20,16 @@ public class Prefers {
         return PreferenceManager.getDefaultSharedPreferences(Init.context());
     }
 
-    public static void backup(File file) {
-        Path.write(file, new Gson().toJson(getPrefers().getAll()).getBytes());
-    }
-
-    public static void restore(File file) {
-        Gson gson = new GsonBuilder().setObjectToNumberStrategy(ToNumberPolicy.LAZILY_PARSED_NUMBER).create();
-        Map<String, Object> map = gson.fromJson(Path.read(file), new TypeToken<Map<String, Object>>() {}.getType());
-        if (map != null) for (Map.Entry<String, ?> entry : map.entrySet()) Prefers.put(entry.getKey(), entry.getValue());
-        Path.clear(file);
-    }
-
     public static String getString(String key) {
         return getString(key, "");
     }
 
     public static String getString(String key, String defaultValue) {
-        return getPrefers().getString(key, defaultValue);
+        try {
+            return getPrefers().getString(key, defaultValue);
+        } catch (Exception e) {
+            return defaultValue;
+        }
     }
 
     public static int getInt(String key) {
@@ -44,15 +37,23 @@ public class Prefers {
     }
 
     public static int getInt(String key, int defaultValue) {
-        return getPrefers().getInt(key, defaultValue);
+        try {
+            return getPrefers().getInt(key, defaultValue);
+        } catch (Exception e) {
+            return defaultValue;
+        }
     }
 
     public static float getFloat(String key) {
-        return getFloat(key, 0);
+        return getFloat(key, 0f);
     }
 
     public static float getFloat(String key, float defaultValue) {
-        return getPrefers().getFloat(key, defaultValue);
+        try {
+            return getPrefers().getFloat(key, defaultValue);
+        } catch (Exception e) {
+            return defaultValue;
+        }
     }
 
     public static boolean getBoolean(String key) {
@@ -60,7 +61,11 @@ public class Prefers {
     }
 
     public static boolean getBoolean(String key, boolean defaultValue) {
-        return getPrefers().getBoolean(key, defaultValue);
+        try {
+            return getPrefers().getBoolean(key, defaultValue);
+        } catch (Exception e) {
+            return defaultValue;
+        }
     }
 
     public static void put(String key, Object obj) {
@@ -83,4 +88,28 @@ public class Prefers {
     public static void remove(String key) {
         getPrefers().edit().remove(key).apply();
     }
+
+    public static void backup(File file) {
+        Path.write(file, new Gson().toJson(getPrefers().getAll()).getBytes());
+    }
+
+    public static void restore(File file) {
+        try {
+            Gson gson = new GsonBuilder().setObjectToNumberStrategy(ToNumberPolicy.LAZILY_PARSED_NUMBER).create();
+            Map<String, Object> map = gson.fromJson(Path.read(file), new TypeToken<Map<String, Object>>() {}.getType());
+            for (Map.Entry<String, ?> entry : map.entrySet()) Prefers.put(entry.getKey(), convert(entry));
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            Path.clear(file);
+        }
+    }
+
+    private static Object convert(Map.Entry<String, ?> entry) {
+        if (entry.getKey().equals("danmu_size")) {
+            return Float.parseFloat(entry.getValue().toString());
+        } else {
+            return entry.getValue();
+        }
+    }
 }