diff --git a/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsFragment.java b/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsFragment.java
index eb444f3cfb..9be99e56ff 100644
--- a/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsFragment.java
+++ b/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsFragment.java
@@ -19,11 +19,17 @@ import com.gh.gamecenter.ask.entity.Questions;
 import com.gh.gamecenter.baselist.ListFragment;
 import com.gh.gamecenter.baselist.LoadStatus;
 import com.gh.gamecenter.baselist.LoadType;
+import com.gh.gamecenter.eventbus.EBReuse;
+
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
 
 import butterknife.BindView;
 import butterknife.OnClick;
 
 import static com.gh.gamecenter.ask.AskFragment.COMMUNITIES_SELECT_REQUEST;
+import static com.gh.gamecenter.personal.PersonalFragment.LOGIN_TAG;
+import static com.gh.gamecenter.personal.PersonalFragment.LOGOUT_TAG;
 
 /**
  * Created by khy on 2/12/17.
@@ -42,7 +48,7 @@ public class AskQuestionsRecommendsFragment extends ListFragment<AnswerEntity, A
 
     @Override
     protected void handleMessage(Message msg) {
-       if (msg.what == 1) {
+        if (msg.what == 1) {
             mRefreshHint.setVisibility(View.GONE);
         }
     }
@@ -114,11 +120,7 @@ public class AskQuestionsRecommendsFragment extends ListFragment<AnswerEntity, A
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
         if (requestCode == COMMUNITIES_SELECT_REQUEST && resultCode == Activity.RESULT_OK) {
-            mReuseNoConn.setVisibility(View.GONE);
-            mReuseNoData.setVisibility(View.GONE);
-            mListLoading.setVisibility(View.VISIBLE);
-            mListRv.setVisibility(View.GONE);
-            mListViewModel.load(null);
+            initList();
         }
     }
 
@@ -176,4 +178,20 @@ public class AskQuestionsRecommendsFragment extends ListFragment<AnswerEntity, A
         super.onPause();
         mAdapter.viewPagerAutoScroll(false);
     }
+
+    public void initList() {
+        mReuseNoConn.setVisibility(View.GONE);
+        mReuseNoData.setVisibility(View.GONE);
+        mListLoading.setVisibility(View.VISIBLE);
+        mListRv.setVisibility(View.GONE);
+        mListViewModel.load(null);
+    }
+
+    // 登录事件
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public void onEventMainThread(EBReuse reuse) {
+        if (LOGIN_TAG.equals(reuse.getType()) || LOGOUT_TAG.equals(reuse.getType())) {
+            initList();
+        }
+    }
 }
diff --git a/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsViewModel.java b/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsViewModel.java
index 53d3b6ac39..56fa3a0c17 100644
--- a/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsViewModel.java
+++ b/app/src/main/java/com/gh/gamecenter/ask/AskQuestionsRecommendsViewModel.java
@@ -13,13 +13,17 @@ import com.gh.gamecenter.ask.entity.AskSubjectEntity;
 import com.gh.gamecenter.baselist.ListViewModel;
 import com.gh.gamecenter.baselist.LoadStatus;
 import com.gh.gamecenter.baselist.LoadType;
+import com.gh.gamecenter.login.AppDatabase;
 import com.gh.gamecenter.manager.UserManager;
 import com.gh.gamecenter.retrofit.Response;
 import com.gh.gamecenter.retrofit.RetrofitManager;
+import com.gh.gamecenter.room.dao.AnswerDao;
 
 import java.util.ArrayList;
 import java.util.List;
 
+import retrofit2.Call;
+import retrofit2.Callback;
 import retrofit2.HttpException;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
@@ -42,9 +46,11 @@ public class AskQuestionsRecommendsViewModel extends ListViewModel<AnswerEntity,
     private MutableLiveData<List<AskSubjectEntity>> mSubjectLiveData = new MediatorLiveData<>();
     private MutableLiveData<LoadStatus> mLoadStatusLiveData = new MutableLiveData<>();
 
+    private AnswerDao mAnswerDao;
+
     public AskQuestionsRecommendsViewModel(@NonNull Application application) {
         super(application);
-        loadAskSubjectColumn();
+        mAnswerDao = AppDatabase.getInstance(application).answerDao();
     }
 
     void loadAskSubjectColumn() {
@@ -57,58 +63,86 @@ public class AskQuestionsRecommendsViewModel extends ListViewModel<AnswerEntity,
                     public void onResponse(List<AskSubjectEntity> response) {
                         super.onResponse(response);
                         mSubjectLiveData.postValue(response);
-                        loadData(false, null);
                     }
 
                     @Override
                     public void onFailure(HttpException e) {
                         super.onFailure(e);
                         mSubjectLiveData.postValue(null);
-                        loadData(false, null);
                     }
                 });
     }
 
     void loadData(boolean isUp, String sequenceId) {
-        Observable<List<AnswerEntity>> askHot;
+        String filter;
         String communityId = UserManager.getInstance().getCommunityId(getApplication());
         if (TextUtils.isEmpty(sequenceId)) {
-            askHot = RetrofitManager.getInstance(getApplication()).getApi().getAskRecommends(communityId, "");
+            filter = "";
         } else if (isUp) {
-            askHot = RetrofitManager.getInstance(getApplication()).getApi().getAskRecommends(communityId,
-                    UrlFilterUtils.getFilterQuery("action", "up", "sequence_id", sequenceId));
+            filter = UrlFilterUtils.getFilterQuery("action", "up", "sequence_id", sequenceId);
         } else {
-            askHot = RetrofitManager.getInstance(getApplication()).getApi().getAskRecommends(communityId,
-                    UrlFilterUtils.getFilterQuery("action", "down", "sequence_id", sequenceId));
+            filter = UrlFilterUtils.getFilterQuery("action", "down", "sequence_id", sequenceId);
         }
 
-        askHot
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(new Response<List<AnswerEntity>>() {
+        RetrofitManager.getInstance(getApplication())
+                .getApi().getAskRecommends(communityId, filter)
+                .enqueue(new Callback<List<AnswerEntity>>() {
                     @Override
-                    public void onResponse(List<AnswerEntity> response) {
-                        loadStatusControl(response.size(), sequenceId, isUp);
-//                        if (response.size() == 0) return; // 不需要添加 页面由LoadStatus控制刷新
-
-                        List<AnswerEntity> previousData = mLiveData.getValue();
-                        if (previousData == null || TextUtils.isEmpty(sequenceId)) {
-                            previousData = new ArrayList<>();
+                    public void onResponse(Call<List<AnswerEntity>> call, retrofit2.Response<List<AnswerEntity>> response) {
+                        if (TextUtils.isEmpty(response.headers().get("Feed-Clean"))) {
+                            deleteDB();
                         }
 
-                        if (isUp) {
-                            previousData.addAll(0, response);
+                        if (response.code() == 200) {
+                            List<AnswerEntity> body = response.body();
+                            loadStatusControl(body.size(), sequenceId, isUp);
+
+                            if ((TextUtils.isEmpty(sequenceId) || isUp) && body.size() > 0) {
+                                insertDB(body);
+                            }
+                            List<AnswerEntity> previousData = mLiveData.getValue();
+                            if (previousData == null || TextUtils.isEmpty(sequenceId)) {
+                                previousData = new ArrayList<>();
+                            }
+
+                            if (isUp) {
+                                previousData.addAll(0, body);
+                            } else {
+                                previousData.addAll(body);
+                            }
+                            mLiveData.postValue(previousData);
                         } else {
-                            previousData.addAll(response);
+                            loadStatusControl(-1, sequenceId, isUp);
                         }
-                        mLiveData.postValue(previousData);
+
                     }
 
                     @Override
-                    public void onFailure(HttpException e) {
+                    public void onFailure(Call<List<AnswerEntity>> call, Throwable t) {
                         loadStatusControl(-1, sequenceId, isUp);
                     }
                 });
+
+    }
+
+    private void deleteDB() {
+        mAnswerDao.deleteData(UserManager.getInstance().getCommunityId(getApplication()) + UserManager.getInstance().getUserId());
+    }
+
+    private void insertDB(List<AnswerEntity> entityList) {
+        String communityId = UserManager.getInstance().getCommunityId(getApplication());
+        String userId = UserManager.getInstance().getUserId();
+        long orderTag = System.currentTimeMillis();
+        if (!TextUtils.isEmpty(communityId)) {
+            for (AnswerEntity answerEntity : entityList) {
+                answerEntity.setAnswerKey(answerEntity.getId() + userId);
+                answerEntity.setCommunityId(communityId + userId);
+                answerEntity.setOrderTag(orderTag);
+            }
+            if (mAnswerDao.updateAnswerEntity(entityList) <= 0) {
+                mAnswerDao.addAnswerEntity(entityList);
+            }
+        }
     }
 
     private void loadStatusControl(int size, String sequenceId, boolean isUp) {
@@ -143,6 +177,15 @@ public class AskQuestionsRecommendsViewModel extends ListViewModel<AnswerEntity,
             loadData(false, value.get(value.size() - 1).getSequenceId());
         } else {
             loadAskSubjectColumn();
+            String communityId = UserManager.getInstance().getCommunityId(getApplication());
+            List<AnswerEntity> dbData = mAnswerDao.getAnswerEntityById(communityId + UserManager.getInstance().getUserId());
+            if (dbData != null && dbData.size() > 0) {
+                mLiveData.postValue(dbData);
+                mLoadStatusLiveData.postValue(LoadStatus.INIT_LOADED);
+                loadData(true, dbData.get(0).getSequenceId());
+            } else {
+                loadData(false, null);
+            }
         }
     }
 
diff --git a/app/src/main/java/com/gh/gamecenter/ask/entity/AnswerEntity.kt b/app/src/main/java/com/gh/gamecenter/ask/entity/AnswerEntity.kt
index 8197a47cbb..5b8862916c 100644
--- a/app/src/main/java/com/gh/gamecenter/ask/entity/AnswerEntity.kt
+++ b/app/src/main/java/com/gh/gamecenter/ask/entity/AnswerEntity.kt
@@ -1,15 +1,31 @@
 package com.gh.gamecenter.ask.entity
 
+import android.arch.persistence.room.Entity
+import android.arch.persistence.room.PrimaryKey
+import android.arch.persistence.room.TypeConverters
 import android.os.Parcel
 import android.os.Parcelable
+import android.support.annotation.NonNull
 import com.gh.gamecenter.entity.UserEntity
+import com.gh.gamecenter.room.converter.AnswerUserConverter
+import com.gh.gamecenter.room.converter.ListStringConverter
+import com.gh.gamecenter.room.converter.QuestionsConverter
 import com.google.gson.annotations.SerializedName
 
 /**
  * Created by khy on 12/12/17.
  */
+@Entity
 class AnswerEntity() : Parcelable {
 
+    @NonNull
+    @PrimaryKey
+    var answerKey: String = "" // db key
+
+    var communityId: String? = null
+
+    var orderTag: Long = 0
+
     @SerializedName("_id")
     var id: String? = null
 
@@ -18,12 +34,15 @@ class AnswerEntity() : Parcelable {
 
     var brief: String? = null
 
+    @TypeConverters(ListStringConverter::class)
     var images: List<String> = ArrayList()
 
     var vote: Int = 0
 
+    @TypeConverters(AnswerUserConverter::class)
     var user: UserEntity = UserEntity()
 
+    @TypeConverters(QuestionsConverter::class)
     @SerializedName("question")
     var questions: Questions = Questions()
 
@@ -31,6 +50,9 @@ class AnswerEntity() : Parcelable {
     var communityName: String? = null
 
     constructor(parcel: Parcel) : this() {
+        answerKey = parcel.readString()
+        communityId = parcel.readString()
+        orderTag = parcel.readLong()
         id = parcel.readString()
         brief = parcel.readString()
         questions = parcel.readParcelable(Questions::class.java.classLoader)
@@ -41,6 +63,9 @@ class AnswerEntity() : Parcelable {
     }
 
     override fun writeToParcel(parcel: Parcel, flags: Int) {
+        parcel.writeString(answerKey)
+        parcel.writeString(communityId)
+        parcel.writeLong(orderTag)
         parcel.writeString(id)
         parcel.writeString(brief)
         parcel.writeParcelable(questions, flags)
diff --git a/app/src/main/java/com/gh/gamecenter/entity/SignEntity.java b/app/src/main/java/com/gh/gamecenter/entity/SignEntity.java
index 8e87b750f4..baa6c47fbe 100644
--- a/app/src/main/java/com/gh/gamecenter/entity/SignEntity.java
+++ b/app/src/main/java/com/gh/gamecenter/entity/SignEntity.java
@@ -5,7 +5,7 @@ import android.arch.persistence.room.PrimaryKey;
 import android.arch.persistence.room.TypeConverters;
 import android.support.annotation.NonNull;
 
-import com.gh.gamecenter.room.SignDataConverter;
+import com.gh.gamecenter.room.converter.SignDataConverter;
 import com.google.gson.annotations.SerializedName;
 
 /**
diff --git a/app/src/main/java/com/gh/gamecenter/login/AppDatabase.java b/app/src/main/java/com/gh/gamecenter/login/AppDatabase.java
index a36dc08cec..66c5ad571b 100644
--- a/app/src/main/java/com/gh/gamecenter/login/AppDatabase.java
+++ b/app/src/main/java/com/gh/gamecenter/login/AppDatabase.java
@@ -5,17 +5,21 @@ import android.arch.persistence.room.Room;
 import android.arch.persistence.room.RoomDatabase;
 import android.content.Context;
 
+import com.gh.gamecenter.ask.entity.AnswerEntity;
 import com.gh.gamecenter.entity.LoginTokenEntity;
 import com.gh.gamecenter.entity.SignEntity;
 import com.gh.gamecenter.entity.UserInfoEntity;
-import com.gh.gamecenter.room.SignDao;
+import com.gh.gamecenter.room.dao.AnswerDao;
+import com.gh.gamecenter.room.dao.SignDao;
 
 /**
  * Created by khy on 28/11/17.
  */
-@Database(entities = {LoginTokenEntity.class, UserInfoEntity.class, SignEntity.class}, version = 3, exportSchema = false)
+@Database(entities = {LoginTokenEntity.class, UserInfoEntity.class, SignEntity.class, AnswerEntity.class}, version = 4, exportSchema = false)
 public abstract class AppDatabase extends RoomDatabase {
 
+    public abstract AnswerDao answerDao();
+
     public abstract SignDao signDao();
 
     public abstract UserInfoDao userInfoDao();
diff --git a/app/src/main/java/com/gh/gamecenter/manager/UserManager.java b/app/src/main/java/com/gh/gamecenter/manager/UserManager.java
index 618a474b86..8c3883f23a 100644
--- a/app/src/main/java/com/gh/gamecenter/manager/UserManager.java
+++ b/app/src/main/java/com/gh/gamecenter/manager/UserManager.java
@@ -58,10 +58,11 @@ public class UserManager {
     }
 
     public String getUserId() {
+        String userId = null;
         if (mUserInfoEntity != null) {
-            return mUserInfoEntity.getUserId();
+            userId = mUserInfoEntity.getUserId();
         }
-        return "";
+        return userId == null ? "" : userId;
     }
 
     public void setCommunityId(Context context, String communityId, String communityName) {
diff --git a/app/src/main/java/com/gh/gamecenter/message/MessageUnreadViewModel.java b/app/src/main/java/com/gh/gamecenter/message/MessageUnreadViewModel.java
index fb3694becf..fb8aa28499 100644
--- a/app/src/main/java/com/gh/gamecenter/message/MessageUnreadViewModel.java
+++ b/app/src/main/java/com/gh/gamecenter/message/MessageUnreadViewModel.java
@@ -39,6 +39,10 @@ public class MessageUnreadViewModel extends AndroidViewModel {
         mRepository.loadMessageUnreadData();
     }
 
+    public void clean() {
+        liveData.postValue(null);
+    }
+
     public void markRead(ReadType readType) {
         MessageUnreadEntity cacheUnreadData = mRepository.getCacheUnreadData();
         if (cacheUnreadData == null) return;
diff --git a/app/src/main/java/com/gh/gamecenter/personal/PersonalFragment.java b/app/src/main/java/com/gh/gamecenter/personal/PersonalFragment.java
index 596537afd0..3b145be840 100644
--- a/app/src/main/java/com/gh/gamecenter/personal/PersonalFragment.java
+++ b/app/src/main/java/com/gh/gamecenter/personal/PersonalFragment.java
@@ -440,9 +440,9 @@ public class PersonalFragment extends BaseFragment implements Observer<ApiRespon
 
         mUserInfoEntity = notifyUserInfo;
         if (notifyUserInfo == null) {
+            mUnreadViewModel.clean();
             changeLoginState(false);
             EventBus.getDefault().post(new EBConcernChanged());
-            if (mIconHint.getVisibility() == View.VISIBLE) mIconHint.setVisibility(View.GONE);
         } else {
             changeLoginState(true);
         }
diff --git a/app/src/main/java/com/gh/gamecenter/retrofit/service/ApiService.java b/app/src/main/java/com/gh/gamecenter/retrofit/service/ApiService.java
index 533e8214fc..6da12aade2 100644
--- a/app/src/main/java/com/gh/gamecenter/retrofit/service/ApiService.java
+++ b/app/src/main/java/com/gh/gamecenter/retrofit/service/ApiService.java
@@ -42,6 +42,7 @@ import java.util.List;
 
 import okhttp3.RequestBody;
 import okhttp3.ResponseBody;
+import retrofit2.Call;
 import retrofit2.http.Body;
 import retrofit2.http.DELETE;
 import retrofit2.http.GET;
@@ -438,13 +439,13 @@ public interface ApiService {
      */
     @Headers({"Content-Type: application/json", "Accept: application/json"})
     @POST("users/{user_id}/packages/{package_name}")
-    Observable<ResponseBody> postPackage(@Path("user_id") String user_id, @Path("package_name") String package_name);
+    Observable<ResponseBody> postPackage(@Path("user_id") String user_id, @Path("package_name") String package_name); // todo
 
     /**
      * 删除已安装游戏
      */
     @DELETE("users/{user_id}/packages/{package_name}")
-    Observable<ResponseBody> deletePackage(@Path("user_id") String user_id, @Path("package_name") String package_name);
+    Observable<ResponseBody> deletePackage(@Path("user_id") String user_id, @Path("package_name") String package_name); // todo
 
     /**
      * 整体更新设备已安装游戏
@@ -660,11 +661,12 @@ public interface ApiService {
     @POST("communities")
     Observable<ResponseBody> postCommunities(@Body RequestBody body);
 
+
     /**
      * 获取社区首页精选
      */
     @GET("communities/{community_id}/recommends")
-    Observable<List<AnswerEntity>> getAskRecommends(@Path("community_id") String communityId, @Query("filter") String filter);
+    Call<List<AnswerEntity>> getAskRecommends(@Path("community_id") String communityId, @Query("filter") String filter);
 
     /**
      * 获取社区首页-问题列表
diff --git a/app/src/main/java/com/gh/gamecenter/room/converter/AnswerUserConverter.java b/app/src/main/java/com/gh/gamecenter/room/converter/AnswerUserConverter.java
new file mode 100644
index 0000000000..a16f16fb36
--- /dev/null
+++ b/app/src/main/java/com/gh/gamecenter/room/converter/AnswerUserConverter.java
@@ -0,0 +1,22 @@
+package com.gh.gamecenter.room.converter;
+
+import android.arch.persistence.room.TypeConverter;
+
+import com.gh.gamecenter.entity.UserEntity;
+import com.google.gson.Gson;
+
+/**
+ * Created by khy on 18/04/18.
+ */
+
+public class AnswerUserConverter {
+    @TypeConverter
+    public static String toUserEntityString(UserEntity data) {
+        return new Gson().toJson(data);
+    }
+
+    @TypeConverter
+    public static UserEntity toUserEntity(String token) {
+        return new Gson().fromJson(token, UserEntity.class);
+    }
+}
diff --git a/app/src/main/java/com/gh/gamecenter/room/converter/ListStringConverter.java b/app/src/main/java/com/gh/gamecenter/room/converter/ListStringConverter.java
new file mode 100644
index 0000000000..2450f7a289
--- /dev/null
+++ b/app/src/main/java/com/gh/gamecenter/room/converter/ListStringConverter.java
@@ -0,0 +1,24 @@
+package com.gh.gamecenter.room.converter;
+
+import android.arch.persistence.room.TypeConverter;
+
+import com.google.gson.Gson;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by khy on 18/04/18.
+ */
+
+public class ListStringConverter {
+    @TypeConverter
+    public static String toListString(List<String> data) {
+        return new Gson().toJson(data);
+    }
+
+    @TypeConverter
+    public static List<String> toList(String token) {
+        return new Gson().fromJson(token, ArrayList.class);
+    }
+}
diff --git a/app/src/main/java/com/gh/gamecenter/room/converter/QuestionsConverter.java b/app/src/main/java/com/gh/gamecenter/room/converter/QuestionsConverter.java
new file mode 100644
index 0000000000..dca44e1e82
--- /dev/null
+++ b/app/src/main/java/com/gh/gamecenter/room/converter/QuestionsConverter.java
@@ -0,0 +1,22 @@
+package com.gh.gamecenter.room.converter;
+
+import android.arch.persistence.room.TypeConverter;
+
+import com.gh.gamecenter.ask.entity.Questions;
+import com.google.gson.Gson;
+
+/**
+ * Created by khy on 18/04/18.
+ */
+
+public class QuestionsConverter {
+    @TypeConverter
+    public static String toQuestionsString(Questions data) {
+        return new Gson().toJson(data);
+    }
+
+    @TypeConverter
+    public static Questions toQuestions(String token) {
+        return new Gson().fromJson(token, Questions.class);
+    }
+}
diff --git a/app/src/main/java/com/gh/gamecenter/room/SignDataConverter.java b/app/src/main/java/com/gh/gamecenter/room/converter/SignDataConverter.java
similarity index 92%
rename from app/src/main/java/com/gh/gamecenter/room/SignDataConverter.java
rename to app/src/main/java/com/gh/gamecenter/room/converter/SignDataConverter.java
index 744d9dafa6..082bc8651d 100644
--- a/app/src/main/java/com/gh/gamecenter/room/SignDataConverter.java
+++ b/app/src/main/java/com/gh/gamecenter/room/converter/SignDataConverter.java
@@ -1,4 +1,4 @@
-package com.gh.gamecenter.room;
+package com.gh.gamecenter.room.converter;
 
 import android.arch.persistence.room.TypeConverter;
 
diff --git a/app/src/main/java/com/gh/gamecenter/room/dao/AnswerDao.java b/app/src/main/java/com/gh/gamecenter/room/dao/AnswerDao.java
new file mode 100644
index 0000000000..657679770b
--- /dev/null
+++ b/app/src/main/java/com/gh/gamecenter/room/dao/AnswerDao.java
@@ -0,0 +1,30 @@
+package com.gh.gamecenter.room.dao;
+
+import android.arch.persistence.room.Dao;
+import android.arch.persistence.room.Insert;
+import android.arch.persistence.room.OnConflictStrategy;
+import android.arch.persistence.room.Query;
+import android.arch.persistence.room.Update;
+
+import com.gh.gamecenter.ask.entity.AnswerEntity;
+
+import java.util.List;
+
+/**
+ * Created by khy on 18/04/18.
+ */
+@Dao
+public interface AnswerDao {
+
+    @Query("select * from AnswerEntity where communityId = :communityId order by orderTag DESC")
+    List<AnswerEntity> getAnswerEntityById(String communityId);
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    void addAnswerEntity(List<AnswerEntity> signEntity);
+
+    @Update(onConflict = OnConflictStrategy.REPLACE)
+    int updateAnswerEntity(List<AnswerEntity> signEntity);
+
+    @Query("delete from AnswerEntity where communityId = :communityId")
+    void deleteData(String communityId);
+}
diff --git a/app/src/main/java/com/gh/gamecenter/room/SignDao.java b/app/src/main/java/com/gh/gamecenter/room/dao/SignDao.java
similarity index 94%
rename from app/src/main/java/com/gh/gamecenter/room/SignDao.java
rename to app/src/main/java/com/gh/gamecenter/room/dao/SignDao.java
index b345fdc6d2..876c86c1cb 100644
--- a/app/src/main/java/com/gh/gamecenter/room/SignDao.java
+++ b/app/src/main/java/com/gh/gamecenter/room/dao/SignDao.java
@@ -1,4 +1,4 @@
-package com.gh.gamecenter.room;
+package com.gh.gamecenter.room.dao;
 
 import android.arch.persistence.room.Dao;
 import android.arch.persistence.room.Insert;