diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/group/AbsGroupCmd.java b/Aria/src/main/java/com/arialyy/aria/core/command/group/AbsGroupCmd.java
index 56b8e17d..5d24fa67 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/group/AbsGroupCmd.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/group/AbsGroupCmd.java
@@ -29,7 +29,7 @@ import com.arialyy.aria.util.CommonUtil;
  * Created by AriaL on 2017/6/29.
  * 任务组命令
  */
-public abstract class AbsGroupCmd<T extends AbsTaskEntity> extends AbsCmd<T> {
+abstract class AbsGroupCmd<T extends AbsTaskEntity> extends AbsCmd<T> {
 
   /**
    * @param targetName 创建任务的对象名
diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/group/GroupCmdFactory.java b/Aria/src/main/java/com/arialyy/aria/core/command/group/GroupCmdFactory.java
index 786dd6b8..a818d688 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/group/GroupCmdFactory.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/group/GroupCmdFactory.java
@@ -22,7 +22,7 @@ import com.arialyy.aria.core.inf.AbsTaskEntity;
 /**
  * Created by AriaL on 2017/6/29.
  */
-public class GroupCmdFactory extends AbsCmdFactory<AbsGroupCmd> {
+class GroupCmdFactory extends AbsCmdFactory<AbsGroupCmd> {
   /**
    * 启动任务
    */
diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/normal/AddCmd.java b/Aria/src/main/java/com/arialyy/aria/core/command/normal/AddCmd.java
index 8ed5de0d..e848813b 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/normal/AddCmd.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/normal/AddCmd.java
@@ -17,7 +17,6 @@
 package com.arialyy.aria.core.command.normal;
 
 import android.util.Log;
-import com.arialyy.aria.core.inf.AbsNormalTask;
 import com.arialyy.aria.core.inf.AbsTask;
 import com.arialyy.aria.core.inf.IEntity;
 import com.arialyy.aria.core.inf.AbsTaskEntity;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
index 7fdcafa2..be7815c1 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
@@ -25,13 +25,10 @@ import com.arialyy.aria.core.scheduler.DownloadSchedulers;
 import com.arialyy.aria.core.scheduler.ISchedulerListener;
 import com.arialyy.aria.core.upload.ProxyHelper;
 import com.arialyy.aria.orm.DbEntity;
-import com.arialyy.aria.orm.DbUtil;
 import com.arialyy.aria.util.CheckUtil;
 import com.arialyy.aria.util.CommonUtil;
-import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 import java.util.Set;
-import java.lang.reflect.Method;
 
 /**
  * Created by lyy on 2016/12/5.
@@ -138,7 +135,8 @@ public class DownloadReceiver extends AbsReceiver {
    */
   public DownloadEntity getDownloadEntity(String downloadUrl) {
     CheckUtil.checkDownloadUrl(downloadUrl);
-    return DbEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl);
+    return DbEntity.findFirst(DownloadEntity.class, "downloadUrl=? and isGroupChild='false'",
+        downloadUrl);
   }
 
   /**
@@ -146,13 +144,14 @@ public class DownloadReceiver extends AbsReceiver {
    */
   public DownloadTaskEntity getDownloadTask(String downloadUrl) {
     CheckUtil.checkDownloadUrl(downloadUrl);
-    return DbEntity.findFirst(DownloadTaskEntity.class, "key=?", downloadUrl);
+    return DbEntity.findFirst(DownloadTaskEntity.class, "key=? and isGroupTask='false'",
+        downloadUrl);
   }
 
   /**
    * 通过下载链接获取保存在数据库的下载任务组实体
    */
-  public DownloadGroupTaskEntity getDownlaodGroupTask(List<String> urls) {
+  public DownloadGroupTaskEntity getDownloadGroupTask(List<String> urls) {
     CheckUtil.checkDownloadUrls(urls);
     String hashCode = CommonUtil.getMd5Code(urls);
     return DbEntity.findFirst(DownloadGroupTaskEntity.class, "key=?", hashCode);
@@ -165,8 +164,18 @@ public class DownloadReceiver extends AbsReceiver {
     return DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl) != null;
   }
 
+  /**
+   * 获取普通下载任务列表
+   */
   @Override public List<DownloadEntity> getTaskList() {
-    return DownloadEntity.findAllData(DownloadEntity.class);
+    return DownloadEntity.findDatas(DownloadEntity.class, "isGroupChild=?", "false");
+  }
+
+  /**
+   * 获取任务组列表
+   */
+  public List<DownloadGroupTaskEntity> getGroupTaskList() {
+    return DownloadEntity.findAllData(DownloadGroupTaskEntity.class);
   }
 
   /**
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
index ab91b62f..4dec4117 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
@@ -36,12 +36,9 @@ public class DownloadTarget
 
   DownloadTarget(String url, String targetName) {
     mTargetName = targetName;
-    DownloadEntity entity = DbEntity.findFirst(DownloadEntity.class, "downloadUrl=?", url);
-    if (entity == null) {
-      entity = getEntity(url);
-    }
-    mEntity = entity;
-    mTaskEntity = DbEntity.findFirst(DownloadTaskEntity.class, "key=?", entity.getDownloadPath());
+    DownloadEntity entity = getEntity(url);
+    mTaskEntity = DbEntity.findFirst(DownloadTaskEntity.class, "key=? and isGroupTask='false'",
+        entity.getDownloadPath());
     if (mTaskEntity == null) {
       mTaskEntity = new DownloadTaskEntity();
       mTaskEntity.key = entity.getDownloadPath();
@@ -49,8 +46,9 @@ public class DownloadTarget
       mTaskEntity.save();
     }
     if (mTaskEntity.entity == null) {
-      mTaskEntity.entity = mEntity;
+      mTaskEntity.entity = entity;
     }
+    mEntity = entity;
   }
 
   /**
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
index af3c693a..f688f8ba 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
@@ -76,24 +76,23 @@ public class DownloadGroupUtil implements IDownloadUtil {
    * 文件信息回调组
    */
   private SparseArray<FileInfoThread.OnFileInfoCallback> mFileInfoCallbacks = new SparseArray<>();
-
-  //任务总数
-  private int mTaskNum = 0;
-  //已经完成的任务数
-  private int mCompleteNum = 0;
-  //失败的任务数
-  private int mFailNum = 0;
   /**
    * 该任务组对应的所有任务
    */
   private Map<String, DownloadTaskEntity> mTasksMap = new HashMap<>();
+  //已经完成的任务数
+  private int mCompleteNum = 0;
+  //失败的任务数
+  private int mFailNum = 0;
+  //实际的下载任务数
+  private int mActualTaskNum = 0;
 
   public DownloadGroupUtil(IDownloadListener listener, DownloadGroupTaskEntity taskEntity) {
     mListener = listener;
     mTaskEntity = taskEntity;
     mInfoPool = Executors.newCachedThreadPool();
     mExePool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
-    mTaskNum = mTaskEntity.entity.getSubTask().size();
+    mActualTaskNum = mTaskEntity.entity.getSubTask().size();
     List<DownloadTaskEntity> tasks =
         DbEntity.findDatas(DownloadTaskEntity.class, "groupName=?", mTaskEntity.key);
     if (tasks != null && !tasks.isEmpty()) {
@@ -224,12 +223,14 @@ public class DownloadGroupUtil implements IDownloadUtil {
             mFailMap.put(url, te);
             mFileInfoCallbacks.put(te.hashCode(), this);
           }
-          mInitFailNum++;
           //404链接不重试下载
-          if (!errorMsg.contains("错误码：404")) {
-            if (failNum < 10) {
-              mInfoPool.execute(createFileInfoThread(te));
-            }
+          if (failNum < 10 && !errorMsg.contains("错误码：404") && !errorMsg.contains(
+              "UnknownHostException")) {
+            mInfoPool.execute(createFileInfoThread(te));
+          } else {
+            mInitFailNum++;
+            mActualTaskNum--;
+            if (mActualTaskNum < 0) mActualTaskNum = 0;
           }
           failNum++;
           if (mInitNum + mInitFailNum == mTaskEntity.getEntity().getSubTask().size()) {
@@ -238,7 +239,6 @@ public class DownloadGroupUtil implements IDownloadUtil {
         }
       };
     }
-
     return new FileInfoThread(taskEntity, callback);
   }
 
@@ -349,7 +349,7 @@ public class DownloadGroupUtil implements IDownloadUtil {
     @Override public void onComplete() {
       saveData(IEntity.STATE_COMPLETE, entity.getFileSize());
       mCompleteNum++;
-      if (mCompleteNum >= mTaskNum) {
+      if (mCompleteNum + mFailNum >= mActualTaskNum) {
         mListener.onComplete();
         closeTimer();
       }
@@ -368,6 +368,8 @@ public class DownloadGroupUtil implements IDownloadUtil {
       if (entity.getFailNum() < 5) {
         Downloader dt = mDownloaderMap.get(entity.getDownloadUrl());
         dt.startDownload();
+      } else {
+        mFailNum++;
       }
     }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java b/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
index 6d943536..680007ec 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/DBConfig.java
@@ -32,7 +32,7 @@ import java.util.Map;
 public class DBConfig {
   static Map<String, Class> mapping = new HashMap<>();
   static String DB_NAME;
-  static int VERSION = 8;
+  static int VERSION = 9;
 
   static {
     if (TextUtils.isEmpty(DB_NAME)) {
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/SqlHelper.java b/Aria/src/main/java/com/arialyy/aria/orm/SqlHelper.java
index 4d87cb04..11896bf2 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/SqlHelper.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/SqlHelper.java
@@ -375,9 +375,8 @@ final class SqlHelper extends SQLiteOpenHelper {
 
   /**
    * 保存一对一的数据
-   * @param field
    */
-  private void saveOneToOneFile(Field field){
+  private void saveOneToOneFile(Field field) {
 
   }
 
@@ -498,7 +497,8 @@ final class SqlHelper extends SQLiteOpenHelper {
           continue;
         }
         if (isPrimary(field)) {
-          sb.append(" PRIMARY KEY");
+          //sb.append(" PRIMARY KEY");
+          sb.append(" NOT NULL");
         }
         sb.append(",");
       }
diff --git a/AriaAnnotations/src/main/java/com/arialyy/annotations/AriaConstance.java b/AriaAnnotations/src/main/java/com/arialyy/annotations/AriaConstance.java
index 3fd7e89a..0481539a 100644
--- a/AriaAnnotations/src/main/java/com/arialyy/annotations/AriaConstance.java
+++ b/AriaAnnotations/src/main/java/com/arialyy/annotations/AriaConstance.java
@@ -21,5 +21,25 @@ package com.arialyy.annotations;
 
 public interface AriaConstance {
   String NO_URL = "";
+
+  /**
+   * 注解方法为普通任务下载
+   */
+  int DOWNLOAD = 0xa1;
+
+  /**
+   * 注解方法为任务组下载
+   */
+  int DOWNLOAD_GROUP = 0xa2;
+
+  /**
+   * 注解方法为普通任务上传
+   */
+  int UPLOAD = 0xb1;
+
+  /**
+   * 注解方法为任务组上传
+   */
+  int UPLOAD_GROUP = 0xb2;
 }
 
diff --git a/app/src/main/java/com/arialyy/simple/download/DownloadModule.java b/app/src/main/java/com/arialyy/simple/download/DownloadModule.java
index 56ad3738..faef1cf3 100644
--- a/app/src/main/java/com/arialyy/simple/download/DownloadModule.java
+++ b/app/src/main/java/com/arialyy/simple/download/DownloadModule.java
@@ -16,27 +16,16 @@
 
 package com.arialyy.simple.download;
 
-import android.content.BroadcastReceiver;
 import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
 import android.content.res.Resources;
 import android.os.Environment;
-import android.os.Handler;
-import com.arialyy.aria.core.Aria;
 import com.arialyy.aria.core.download.DownloadEntity;
-import com.arialyy.aria.util.CommonUtil;
-import com.arialyy.frame.util.AndroidUtils;
-import com.arialyy.frame.util.StringUtil;
-import com.arialyy.frame.util.show.L;
 import com.arialyy.simple.R;
 import com.arialyy.simple.download.multi_download.FileListEntity;
 import com.arialyy.simple.base.BaseModule;
-import java.io.File;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Random;
 
 /**
  * Created by Lyy on 2016/9/27.
diff --git a/app/src/main/java/com/arialyy/simple/download/group/DownloadGroupActivity.java b/app/src/main/java/com/arialyy/simple/download/group/DownloadGroupActivity.java
index 22c73f3a..2a8ae080 100644
--- a/app/src/main/java/com/arialyy/simple/download/group/DownloadGroupActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/group/DownloadGroupActivity.java
@@ -25,7 +25,6 @@ import com.arialyy.aria.core.Aria;
 import com.arialyy.aria.core.download.DownloadGroupEntity;
 import com.arialyy.aria.core.download.DownloadGroupTask;
 import com.arialyy.aria.core.download.DownloadGroupTaskEntity;
-import com.arialyy.aria.util.CommonUtil;
 import com.arialyy.frame.util.show.L;
 import com.arialyy.frame.util.show.T;
 import com.arialyy.simple.R;
@@ -48,12 +47,16 @@ public class DownloadGroupActivity extends BaseActivity<ActivityDownloadGroupBin
     Aria.download(this).register();
     setTitle("任务组");
     mUrls = getModule(GroupModule.class).getUrls();
-    DownloadGroupTaskEntity entity = Aria.download(this).getDownlaodGroupTask(mUrls);
+    DownloadGroupTaskEntity entity = Aria.download(this).getDownloadGroupTask(mUrls);
     if (entity != null && entity.getEntity() != null) {
       DownloadGroupEntity groupEntity = entity.getEntity();
       getBinding().setFileSize(groupEntity.getConvertFileSize());
-      getBinding().setProgress(groupEntity.isComplete() ? 100
-          : (int) (groupEntity.getCurrentProgress() * 100 / groupEntity.getFileSize()));
+      if (groupEntity.getFileSize() == 0) {
+        getBinding().setProgress(0);
+      } else {
+        getBinding().setProgress(groupEntity.isComplete() ? 100
+            : (int) (groupEntity.getCurrentProgress() * 100 / groupEntity.getFileSize()));
+      }
     }
   }
 
diff --git a/app/src/main/java/com/arialyy/simple/download/multi_download/MultiDownloadActivity.java b/app/src/main/java/com/arialyy/simple/download/multi_download/MultiDownloadActivity.java
index 915472fa..ccbf347c 100644
--- a/app/src/main/java/com/arialyy/simple/download/multi_download/MultiDownloadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/multi_download/MultiDownloadActivity.java
@@ -19,7 +19,6 @@ package com.arialyy.simple.download.multi_download;
 import android.os.Bundle;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
 import butterknife.Bind;
@@ -28,7 +27,6 @@ import com.arialyy.aria.core.Aria;
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.DownloadTask;
 import com.arialyy.frame.util.show.L;
-import com.arialyy.frame.util.show.T;
 import com.arialyy.simple.R;
 import com.arialyy.simple.base.BaseActivity;
 import com.arialyy.simple.databinding.ActivityMultiDownloadBinding;