diff --git a/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/Preference.java b/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/Preference.java
index d5b8695ec5..d13d76ce8a 100644
--- a/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/Preference.java
+++ b/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/Preference.java
@@ -19,8 +19,6 @@
 
 package org.mariotaku.twidere.annotation;
 
-import android.support.annotation.IntDef;
-
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -46,10 +44,6 @@
 
     boolean hasDefault() default false;
 
-    @Type int type() default Type.NULL;
+    @PreferenceType int type() default PreferenceType.NULL;
 
-    @IntDef({Type.BOOLEAN, Type.INT, Type.LONG, Type.FLOAT, Type.STRING, Type.NULL, Type.INVALID})
-    @interface Type {
-        int BOOLEAN = 1, INT = 2, LONG = 3, FLOAT = 4, STRING = 5, NULL = 0, INVALID = -1;
-    }
 }
diff --git a/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/PreferenceType.java b/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/PreferenceType.java
new file mode 100644
index 0000000000..bc02735f51
--- /dev/null
+++ b/twidere.component.common/src/main/java/org/mariotaku/twidere/annotation/PreferenceType.java
@@ -0,0 +1,12 @@
+package org.mariotaku.twidere.annotation;
+
+import android.support.annotation.IntDef;
+
+/**
+ * Created by mariotaku on 16/1/8.
+ */
+@IntDef({PreferenceType.BOOLEAN, PreferenceType.INT, PreferenceType.LONG, PreferenceType.FLOAT,
+        PreferenceType.STRING, PreferenceType.NULL, PreferenceType.INVALID})
+public @interface PreferenceType {
+    int BOOLEAN = 1, INT = 2, LONG = 3, FLOAT = 4, STRING = 5, NULL = 0, INVALID = -1;
+}
diff --git a/twidere.component.common/src/main/java/org/mariotaku/twidere/constant/SharedPreferenceConstants.java b/twidere.component.common/src/main/java/org/mariotaku/twidere/constant/SharedPreferenceConstants.java
index 7c8431b109..eb2923e733 100644
--- a/twidere.component.common/src/main/java/org/mariotaku/twidere/constant/SharedPreferenceConstants.java
+++ b/twidere.component.common/src/main/java/org/mariotaku/twidere/constant/SharedPreferenceConstants.java
@@ -23,10 +23,10 @@
 import org.mariotaku.twidere.annotation.Preference;
 import org.mariotaku.twidere.model.ParcelableCredentials;
 
-import static org.mariotaku.twidere.annotation.Preference.Type.BOOLEAN;
-import static org.mariotaku.twidere.annotation.Preference.Type.INT;
-import static org.mariotaku.twidere.annotation.Preference.Type.LONG;
-import static org.mariotaku.twidere.annotation.Preference.Type.STRING;
+import static org.mariotaku.twidere.annotation.PreferenceType.BOOLEAN;
+import static org.mariotaku.twidere.annotation.PreferenceType.INT;
+import static org.mariotaku.twidere.annotation.PreferenceType.LONG;
+import static org.mariotaku.twidere.annotation.PreferenceType.STRING;
 
 public interface SharedPreferenceConstants {
 
diff --git a/twidere/src/main/java/org/mariotaku/twidere/Constants.java b/twidere/src/main/java/org/mariotaku/twidere/Constants.java
index 99dae8e7af..7be3cb9b7d 100644
--- a/twidere/src/main/java/org/mariotaku/twidere/Constants.java
+++ b/twidere/src/main/java/org/mariotaku/twidere/Constants.java
@@ -21,8 +21,8 @@
 
 import org.mariotaku.twidere.annotation.Preference;
 
-import static org.mariotaku.twidere.annotation.Preference.Type.BOOLEAN;
-import static org.mariotaku.twidere.annotation.Preference.Type.STRING;
+import static org.mariotaku.twidere.annotation.PreferenceType.BOOLEAN;
+import static org.mariotaku.twidere.annotation.PreferenceType.STRING;
 
 /**
  * Constants requires full application to build or useless for other
diff --git a/twidere/src/main/java/org/mariotaku/twidere/util/DataImportExportUtils.java b/twidere/src/main/java/org/mariotaku/twidere/util/DataImportExportUtils.java
index 92a1ae211d..d91bf03ceb 100644
--- a/twidere/src/main/java/org/mariotaku/twidere/util/DataImportExportUtils.java
+++ b/twidere/src/main/java/org/mariotaku/twidere/util/DataImportExportUtils.java
@@ -28,7 +28,7 @@
 import org.json.JSONObject;
 import org.mariotaku.twidere.Constants;
 import org.mariotaku.twidere.annotation.Preference;
-import org.mariotaku.twidere.annotation.Preference.Type;
+import org.mariotaku.twidere.annotation.PreferenceType;
 import org.mariotaku.twidere.constant.SharedPreferenceConstants;
 
 import java.io.BufferedOutputStream;
@@ -122,7 +122,7 @@ public static HashMap<String, Preference> getSupportedPreferencesMap(Class cls)
         for (final Field field : fields) {
             final Preference annotation = field.getAnnotation(Preference.class);
             if (Modifier.isStatic(field.getModifiers()) && CompareUtils.classEquals(field.getType(), String.class)
-                    && annotation != null && annotation.exportable() && annotation.type() != Type.INVALID) {
+                    && annotation != null && annotation.exportable() && annotation.type() != PreferenceType.INVALID) {
                 try {
                     supportedPrefsMap.put((String) field.get(null), annotation);
                 } catch (final IllegalAccessException | IllegalArgumentException e) {
@@ -255,19 +255,19 @@ public boolean importValue(JSONObject json, String key, SharedPreferences.Editor
             final Preference preference = supportedMap.get(key);
             if (preference == null || !preference.exportable()) return false;
             switch (preference.type()) {
-                case Type.BOOLEAN:
+                case PreferenceType.BOOLEAN:
                     editor.putBoolean(key, json.optBoolean(key, preference.defaultBoolean()));
                     break;
-                case Type.INT:
+                case PreferenceType.INT:
                     editor.putInt(key, json.optInt(key, preference.defaultInt()));
                     break;
-                case Type.LONG:
+                case PreferenceType.LONG:
                     editor.putLong(key, json.optLong(key, preference.defaultLong()));
                     break;
-                case Type.FLOAT:
+                case PreferenceType.FLOAT:
                     editor.putFloat(key, (float) json.optDouble(key, preference.defaultFloat()));
                     break;
-                case Type.STRING:
+                case PreferenceType.STRING:
                     editor.putString(key, json.optString(key, preference.defaultString()));
                     break;
                 default:
@@ -282,19 +282,19 @@ public boolean exportValue(JSONObject json, String key, SharedPreferences prefer
             if (preference == null || !preference.exportable()) return false;
             try {
                 switch (preference.type()) {
-                    case Type.BOOLEAN:
+                    case PreferenceType.BOOLEAN:
                         json.put(key, preferences.getBoolean(key, preference.defaultBoolean()));
                         break;
-                    case Type.INT:
+                    case PreferenceType.INT:
                         json.put(key, preferences.getInt(key, preference.defaultInt()));
                         break;
-                    case Type.LONG:
+                    case PreferenceType.LONG:
                         json.put(key, preferences.getLong(key, preference.defaultLong()));
                         break;
-                    case Type.FLOAT:
+                    case PreferenceType.FLOAT:
                         json.put(key, preferences.getFloat(key, preference.defaultFloat()));
                         break;
-                    case Type.STRING:
+                    case PreferenceType.STRING:
                         json.put(key, preferences.getString(key, preference.defaultString()));
                         break;
                     default: