diff --git a/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java b/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
index 96073554..40343682 100644
--- a/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/activity/MultiTaskActivity.java
@@ -8,8 +8,8 @@ import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
 import butterknife.Bind;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.core.DownloadManager;
-import com.arialyy.downloadutil.entity.DownloadEntity;
 import com.arialyy.frame.util.show.L;
 import com.arialyy.simple.R;
 import com.arialyy.simple.adapter.DownloadAdapter;
@@ -59,7 +59,9 @@ public class MultiTaskActivity extends BaseActivity<ActivityMultiBinding> {
           break;
         case DownloadManager.ACTION_RUNNING:
           long current = intent.getLongExtra(DownloadManager.CURRENT_LOCATION, 0);
-          mAdapter.setProgress(entity.getDownloadUrl(), current);
+          long speed = intent.getLongExtra(DownloadManager.CURRENT_SPEED, 0);
+          //mAdapter.setProgress(entity.getDownloadUrl(), current, speed);
+          mAdapter.setProgress(entity);
           break;
         case DownloadManager.ACTION_STOP:
           L.d(TAG, "download stop");
@@ -71,6 +73,7 @@ public class MultiTaskActivity extends BaseActivity<ActivityMultiBinding> {
           break;
         case DownloadManager.ACTION_CANCEL:
           L.d(TAG, "download cancel");
+          mAdapter.updateState(entity);
           break;
         case DownloadManager.ACTION_FAIL:
           L.d(TAG, "download fail");
diff --git a/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
index 5cd18592..15d358d1 100644
--- a/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
@@ -17,7 +17,7 @@ import butterknife.Bind;
 import com.arialyy.downloadutil.core.DownloadManager;
 import com.arialyy.downloadutil.core.command.CommandFactory;
 import com.arialyy.downloadutil.core.command.IDownloadCommand;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.orm.DbEntity;
 import com.arialyy.downloadutil.util.Util;
 import com.arialyy.frame.util.show.L;
diff --git a/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java b/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
index 87fa84e5..9305a87c 100644
--- a/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
+++ b/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
@@ -4,14 +4,15 @@ import android.content.Context;
 import android.content.res.Resources;
 import android.view.View;
 import android.widget.Button;
+import android.widget.TextView;
 import butterknife.Bind;
 import com.arialyy.absadapter.common.AbsHolder;
 import com.arialyy.absadapter.recycler_view.AbsRVAdapter;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.core.DownloadManager;
 import com.arialyy.downloadutil.core.command.CommandFactory;
 import com.arialyy.downloadutil.core.command.IDownloadCommand;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.frame.util.show.L;
+import com.arialyy.downloadutil.util.Util;
 import com.arialyy.simple.R;
 import com.arialyy.simple.widget.HorizontalProgressBarWithNumber;
 import java.util.ArrayList;
@@ -28,14 +29,12 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
   private static final String TAG = "DownloadAdapter";
   private DownloadManager mManager;
   private CommandFactory  mFactory;
-  private Map<String, Long>    mProgress  = new HashMap<>();
   private Map<String, Integer> mPositions = new HashMap<>();
 
   public DownloadAdapter(Context context, List<DownloadEntity> data) {
     super(context, data);
     int i = 0;
     for (DownloadEntity entity : data) {
-      mProgress.put(entity.getDownloadUrl(), entity.getCurrentProgress());
       mPositions.put(entity.getDownloadUrl(), i);
       i++;
     }
@@ -52,15 +51,26 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
   }
 
   public synchronized void updateState(DownloadEntity entity) {
-    notifyItemChanged(indexItem(entity.getDownloadUrl()));
+    if (entity.getState() == DownloadEntity.STATE_CANCEL) {
+      mPositions.clear();
+      int i = 0;
+      for (DownloadEntity entity_1 : mData) {
+        mPositions.put(entity_1.getDownloadUrl(), i);
+        i++;
+      }
+      notifyDataSetChanged();
+    } else {
+      int position = indexItem(entity.getDownloadUrl());
+      mData.set(position, entity);
+      notifyItemChanged(position);
+    }
   }
 
-  public synchronized void setProgress(String url, long currentPosition) {
-    mProgress.put(url, currentPosition);
-    //        int index = indexItem(url);
-    //        L.d(TAG, "index ==> " + index);
-    //        notifyItemChanged(index);
-    notifyItemChanged(indexItem(url));
+  public synchronized void setProgress(DownloadEntity entity) {
+    String url      = entity.getDownloadUrl();
+    int    position = indexItem(url);
+    mData.set(position, entity);
+    notifyItemChanged(position);
   }
 
   private synchronized int indexItem(String url) {
@@ -74,14 +84,12 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
     return -1;
   }
 
-  @Override protected void bindData(MyHolder holder, int position, DownloadEntity item) {
-    //holder.progress.setProgress(item.getCurrentProgress());
-    long size    = item.getFileSize();
-    int  current = 0;
-    if (size == 0) {
-      current = 0;
-    }
-    current = (int) (mProgress.get(item.getDownloadUrl()) * 100 / item.getFileSize());
+  @Override protected void bindData(MyHolder holder, int position, final DownloadEntity item) {
+    long size     = item.getFileSize();
+    int  current  = 0;
+    long progress = item.getCurrentProgress();
+    long speed    = item.getSpeed();
+    current = size == 0 ? 0 : (int) (progress * 100 / size);
     holder.progress.setProgress(current);
     BtClickListener listener = new BtClickListener(position, item);
     holder.bt.setOnClickListener(listener);
@@ -108,6 +116,22 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
     }
     holder.bt.setText(str);
     holder.bt.setTextColor(getColor(color));
+    holder.speed.setText(Util.formatFileSize(speed) + "/s");
+    holder.fileSize.setText(covertCurrentSize(progress) + "/" + Util.formatFileSize(size));
+    holder.cancel.setOnClickListener(new View.OnClickListener() {
+      @Override public void onClick(View v) {
+        mData.remove(item);
+        notifyDataSetChanged();
+        IDownloadCommand cancelCommand =
+            mFactory.createCommand(getContext(), item, CommandFactory.TASK_CANCEL);
+        mManager.setCommand(cancelCommand).exe();
+      }
+    });
+  }
+
+  private String covertCurrentSize(long currentSize) {
+    String size = Util.formatFileSize(currentSize);
+    return size.substring(0, size.length() - 1);
   }
 
   private int getColor(int color) {
@@ -124,7 +148,6 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
     }
 
     @Override public void onClick(View v) {
-      L.d(TAG, "position ==> " + position);
       switch (entity.getState()) {
         case DownloadEntity.STATE_WAIT:
         case DownloadEntity.STATE_OTHER:
@@ -140,7 +163,6 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
     }
 
     private void start(DownloadEntity entity) {
-
       List<IDownloadCommand> commands = new ArrayList<>();
       IDownloadCommand addCommand =
           mFactory.createCommand(getContext(), entity, CommandFactory.TASK_CREATE);
@@ -156,17 +178,14 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
           mFactory.createCommand(getContext(), entity, CommandFactory.TASK_STOP);
       mManager.setCommand(stopCommand).exe();
     }
-
-    private void cancel(DownloadEntity entity) {
-      IDownloadCommand cancelCommand =
-          mFactory.createCommand(getContext(), entity, CommandFactory.TASK_CANCEL);
-      mManager.setCommand(cancelCommand).exe();
-    }
   }
 
   class MyHolder extends AbsHolder {
     @Bind(R.id.progressBar) HorizontalProgressBarWithNumber progress;
     @Bind(R.id.bt)          Button                          bt;
+    @Bind(R.id.speed)       TextView                        speed;
+    @Bind(R.id.fileSize)    TextView                        fileSize;
+    @Bind(R.id.del)         TextView                        cancel;
 
     MyHolder(View itemView) {
       super(itemView);
diff --git a/app/src/main/java/com/arialyy/simple/module/DownloadModule.java b/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
index 89073f0e..a91137a3 100644
--- a/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
+++ b/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
@@ -4,7 +4,7 @@ import android.content.Context;
 import android.content.IntentFilter;
 import android.os.Environment;
 import com.arialyy.downloadutil.core.DownloadManager;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.util.Util;
 import com.arialyy.frame.util.AndroidUtils;
 import com.arialyy.frame.util.StringUtil;
@@ -27,11 +27,8 @@ public class DownloadModule extends BaseModule {
    */
   public List<DownloadEntity> getDownloadData() {
     List<DownloadEntity> list        = DownloadEntity.findAllData(DownloadEntity.class);
-    List<DownloadEntity> newDownload = createNewDownload();
-    if (list == null) {
-      list = newDownload;
-    } else {
-      list = filter(list, newDownload);
+    if (list == null || list.size() == 0) {
+      list = createNewDownload();
     }
     return list;
   }
@@ -53,7 +50,7 @@ public class DownloadModule extends BaseModule {
           break;
         }
         count++;
-        if (count == sqlEntity.size()) {
+        if (count == createdEntity.size()) {
           list.add(cEntity);
         }
       }
@@ -74,6 +71,7 @@ public class DownloadModule extends BaseModule {
       entity.setDownloadUrl(url);
       entity.setDownloadPath(getDownloadPath(url));
       entity.setFileName(fileName);
+      entity.save();
       list.add(entity);
     }
     return list;
diff --git a/app/src/main/res/color/bt_selector_cancel.xml b/app/src/main/res/color/bt_selector_cancel.xml
new file mode 100644
index 00000000..284a614c
--- /dev/null
+++ b/app/src/main/res/color/bt_selector_cancel.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:color="@color/black" android:state_pressed="true"/>
+  <item android:color="@color/colorAccent" android:state_pressed="false"/>
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_download.xml b/app/src/main/res/layout/item_download.xml
index 830dde58..29ec955d 100644
--- a/app/src/main/res/layout/item_download.xml
+++ b/app/src/main/res/layout/item_download.xml
@@ -9,19 +9,50 @@
       android:id="@+id/progressBar"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
-      android:layout_centerVertical="true"
       android:layout_marginRight="16dp"
+      android:layout_marginTop="16dp"
       android:layout_toLeftOf="@+id/bt"
       android:max="100"
       />
 
+  <TextView
+      android:id="@+id/fileSize"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:layout_below="@+id/progressBar"
+      android:layout_marginTop="8dp"
+      android:text="0mb/0mb"
+      android:textColor="@color/black"
+      />
+
   <Button
       android:id="@+id/bt"
       android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
+      android:layout_height="40dp"
       android:layout_alignParentRight="true"
+      android:layout_centerVertical="true"
       android:text="开始"
       style="?buttonBarButtonStyle"
       />
 
+  <TextView
+      android:id="@+id/speed"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:layout_alignTop="@+id/fileSize"
+      android:layout_centerHorizontal="true"
+      android:text="0kb/s"
+      android:textColor="@color/black"
+      />
+
+  <TextView
+      android:id="@+id/del"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:layout_alignRight="@+id/progressBar"
+      android:layout_alignTop="@+id/fileSize"
+      android:text="删除"
+      android:textColor="@color/bt_selector_cancel"
+      />
+
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 5a077b3a..56c76b7a 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -3,4 +3,5 @@
   <color name="colorPrimary">#3F51B5</color>
   <color name="colorPrimaryDark">#303F9F</color>
   <color name="colorAccent">#FF4081</color>
+  <color name="black">#2B2B2B</color>
 </resources>
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/DownLoadUtil.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownLoadUtil.java
similarity index 88%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/util/DownLoadUtil.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/core/DownLoadUtil.java
index 76616f7c..36363a18 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/DownLoadUtil.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownLoadUtil.java
@@ -1,16 +1,17 @@
-package com.arialyy.downloadutil.util;
+package com.arialyy.downloadutil.core;
 
 import android.content.Context;
 import android.support.annotation.NonNull;
 import android.util.Log;
 import android.util.SparseArray;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.util.Util;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.RandomAccessFile;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
+import java.net.ProtocolException;
 import java.net.URL;
 import java.util.Properties;
 import java.util.concurrent.ExecutorService;
@@ -71,10 +72,14 @@ final class DownLoadUtil {
    */
   public void cancelDownload() {
     isCancel = true;
-    Log.d(TAG, "++++++++++++++++ onCancel +++++++++++++++++");
     isDownloading = false;
     mFixedThreadPool.shutdown();
-    mListener.onCancel();
+    for (int i = 0; i < THREAD_NUM; i++) {
+      DownLoadTask task = (DownLoadTask) mTask.get(i);
+      if (task != null) {
+        task.cancel();
+      }
+    }
   }
 
   /**
@@ -82,7 +87,6 @@ final class DownLoadUtil {
    */
   public void stopDownload() {
     isStop = true;
-    Log.d(TAG, "++++++++++++++++ onStop +++++++++++++++++");
     isDownloading = false;
     mFixedThreadPool.shutdown();
     for (int i = 0; i < THREAD_NUM; i++) {
@@ -155,13 +159,8 @@ final class DownLoadUtil {
           mListener = downloadListener;
           URL               url  = new URL(downloadUrl);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-          conn.setRequestMethod("GET");
-          conn.setRequestProperty("Charset", "UTF-8");
+          setCommadParam(conn);
           conn.setConnectTimeout(TIME_OUT * 4);
-          conn.setRequestProperty("User-Agent",
-              "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
-          conn.setRequestProperty("Accept",
-              "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
           conn.connect();
           int len = conn.getContentLength();
           if (len < 0) {  //网络被劫持时会出现这个问题
@@ -177,7 +176,7 @@ final class DownLoadUtil {
             RandomAccessFile file = new RandomAccessFile(filePath, "rwd");
             //设置文件长度
             file.setLength(fileLength);
-            mListener.onPreDownload(conn);
+            mListener.onPreDownload(conn.getContentLength());
             //分配每条线程的下载区间
             Properties pro = null;
             pro = Util.loadConfig(configFile);
@@ -282,9 +281,17 @@ final class DownLoadUtil {
     mListener.onFail();
   }
 
+  private void setCommadParam(HttpURLConnection conn) throws ProtocolException {
+    conn.setRequestMethod("GET");
+    conn.setRequestProperty("Charset", "UTF-8");
+    conn.setRequestProperty("User-Agent",
+        "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
+    conn.setRequestProperty("Accept",
+        "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
+  }
 
   /**
-   * 多线程下载任务类,不能使用AsyncTask来进行多线程下载，因为AsyncTask是串行执行的，这种方式下载速度太慢了
+   * 单个线程的下载任务
    */
   private class DownLoadTask implements Runnable {
     private static final String TAG = "DownLoadTask";
@@ -316,12 +323,7 @@ final class DownLoadUtil {
         //在头里面请求下载开始位置和结束位置
         conn.setRequestProperty("Range",
             "bytes=" + dEntity.startLocation + "-" + dEntity.endLocation);
-        conn.setRequestMethod("GET");
-        conn.setRequestProperty("Charset", "UTF-8");
-        conn.setRequestProperty("User-Agent",
-            "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
-        conn.setRequestProperty("Accept",
-            "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
+        setCommadParam(conn);
         conn.setConnectTimeout(TIME_OUT * 4);
         conn.setReadTimeout(TIME_OUT * 24);  //设置读取流的等待时间,必须设置该参数
         is = conn.getInputStream();
@@ -416,9 +418,9 @@ final class DownLoadUtil {
           if (dEntity.tempFile.exists()) {
             dEntity.tempFile.delete();
           }
-          //Log.d(TAG, "++++++++++++++++ onCancel +++++++++++++++++");
-          //isDownloading = false;
-          //mListener.onCancel();
+          Log.d(TAG, "++++++++++++++++ onCancel +++++++++++++++++");
+          isDownloading = false;
+          mListener.onCancel();
         }
       }
     }
@@ -504,7 +506,7 @@ final class DownLoadUtil {
 
     }
 
-    @Override public void onPreDownload(HttpURLConnection connection) {
+    @Override public void onPreDownload(long fileSize) {
 
     }
 
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/entity/DownloadEntity.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadEntity.java
similarity index 80%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/entity/DownloadEntity.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadEntity.java
index 30b409ba..ab24cf6d 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/entity/DownloadEntity.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadEntity.java
@@ -1,4 +1,4 @@
-package com.arialyy.downloadutil.entity;
+package com.arialyy.downloadutil.core;
 
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -39,16 +39,17 @@ public class DownloadEntity extends DbEntity implements Parcelable, Cloneable {
    */
   @Ignore public static final int STATE_CANCEL       = 5;
 
-  private String downloadUrl  = ""; //下载路径
-  private String downloadPath = "";    //保存路径
-  private String fileName     = "";        //文件名
-  private String str          = "";             //其它字段
+  @Ignore private long    speed              = 0; //下载速度
+  private         String  downloadUrl        = ""; //下载路径
+  private         String  downloadPath       = ""; //保存路径
+  private         String  fileName           = ""; //文件名
+  private         String  str                = ""; //其它字段
+  private         long    fileSize           = 1;
+  private         int     state              = STATE_WAIT;
+  private         boolean isDownloadComplete = false;   //是否下载完成
+  private         long    currentProgress    = 0;    //当前下载进度
+  private         int     failNum            = 0;
   private long completeTime;  //完成时间
-  private long    fileSize           = 1;
-  private int     state              = STATE_WAIT;
-  private boolean isDownloadComplete = false;   //是否下载完成
-  private long    currentProgress    = 0;    //当前下载进度
-  private int     failNum            = 0;
 
   public DownloadEntity() {
   }
@@ -125,6 +126,14 @@ public class DownloadEntity extends DbEntity implements Parcelable, Cloneable {
     isDownloadComplete = downloadComplete;
   }
 
+  public long getSpeed() {
+    return speed;
+  }
+
+  public void setSpeed(long speed) {
+    this.speed = speed;
+  }
+
   public long getCurrentProgress() {
     return currentProgress;
   }
@@ -137,42 +146,6 @@ public class DownloadEntity extends DbEntity implements Parcelable, Cloneable {
     return (DownloadEntity) super.clone();
   }
 
-  @Override public int describeContents() {
-    return 0;
-  }
-
-  @Override public void writeToParcel(Parcel dest, int flags) {
-    dest.writeString(this.downloadUrl);
-    dest.writeString(this.downloadPath);
-    dest.writeLong(this.completeTime);
-    dest.writeLong(this.fileSize);
-    dest.writeInt(this.state);
-    dest.writeByte(this.isDownloadComplete ? (byte) 1 : (byte) 0);
-    dest.writeLong(this.currentProgress);
-    dest.writeInt(this.failNum);
-  }
-
-  protected DownloadEntity(Parcel in) {
-    this.downloadUrl = in.readString();
-    this.downloadPath = in.readString();
-    this.completeTime = in.readLong();
-    this.fileSize = in.readLong();
-    this.state = in.readInt();
-    this.isDownloadComplete = in.readByte() != 0;
-    this.currentProgress = in.readLong();
-    this.failNum = in.readInt();
-  }
-
-  @Ignore public static final Creator<DownloadEntity> CREATOR = new Creator<DownloadEntity>() {
-    @Override public DownloadEntity createFromParcel(Parcel source) {
-      return new DownloadEntity(source);
-    }
-
-    @Override public DownloadEntity[] newArray(int size) {
-      return new DownloadEntity[size];
-    }
-  };
-
   @Override public String toString() {
     return "DownloadEntity{" +
         "downloadUrl='" + downloadUrl + '\'' +
@@ -185,4 +158,46 @@ public class DownloadEntity extends DbEntity implements Parcelable, Cloneable {
         ", failNum=" + failNum +
         '}';
   }
+
+  @Override public int describeContents() {
+    return 0;
+  }
+
+  @Override public void writeToParcel(Parcel dest, int flags) {
+    dest.writeString(this.downloadUrl);
+    dest.writeString(this.downloadPath);
+    dest.writeString(this.fileName);
+    dest.writeString(this.str);
+    dest.writeLong(this.completeTime);
+    dest.writeLong(this.fileSize);
+    dest.writeInt(this.state);
+    dest.writeByte(this.isDownloadComplete ? (byte) 1 : (byte) 0);
+    dest.writeLong(this.currentProgress);
+    dest.writeInt(this.failNum);
+    dest.writeLong(this.speed);
+  }
+
+  protected DownloadEntity(Parcel in) {
+    this.downloadUrl = in.readString();
+    this.downloadPath = in.readString();
+    this.fileName = in.readString();
+    this.str = in.readString();
+    this.completeTime = in.readLong();
+    this.fileSize = in.readLong();
+    this.state = in.readInt();
+    this.isDownloadComplete = in.readByte() != 0;
+    this.currentProgress = in.readLong();
+    this.failNum = in.readInt();
+    this.speed = in.readLong();
+  }
+
+  @Ignore public static final Creator<DownloadEntity> CREATOR = new Creator<DownloadEntity>() {
+    @Override public DownloadEntity createFromParcel(Parcel source) {
+      return new DownloadEntity(source);
+    }
+
+    @Override public DownloadEntity[] newArray(int size) {
+      return new DownloadEntity[size];
+    }
+  };
 }
\ No newline at end of file
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
index 5d1f030f..636c0446 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadManager.java
@@ -4,7 +4,6 @@ import android.app.Application;
 import android.content.Context;
 import android.util.Log;
 import com.arialyy.downloadutil.core.command.IDownloadCommand;
-import com.arialyy.downloadutil.entity.DownloadEntity;
 import com.arialyy.downloadutil.orm.DbEntity;
 import com.arialyy.downloadutil.orm.DbUtil;
 import java.util.ArrayList;
@@ -68,6 +67,11 @@ public class DownloadManager {
    */
   public static final String CURRENT_LOCATION = "CURRENT_LOCATION";
 
+  /**
+   * 速度
+   */
+  public static final String CURRENT_SPEED = "CURRENT_SPEED";
+
   private List<IDownloadCommand> mCommands = new ArrayList<>();
 
   private DownloadManager() {
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadTarget.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadTarget.java
index 6b690e12..d0f084ab 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadTarget.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/DownloadTarget.java
@@ -2,8 +2,6 @@ package com.arialyy.downloadutil.core;
 
 import android.content.Context;
 import android.util.Log;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
 
 /**
  * Created by lyy on 2016/8/17.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/IDownloadListener.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadListener.java
similarity index 85%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/util/IDownloadListener.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadListener.java
index 32588d27..ab212c10 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/IDownloadListener.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadListener.java
@@ -1,6 +1,4 @@
-package com.arialyy.downloadutil.util;
-
-import java.net.HttpURLConnection;
+package com.arialyy.downloadutil.core;
 
 /**
  * 下载监听
@@ -19,7 +17,7 @@ public interface IDownloadListener {
   /**
    * 下载预处理,可通过HttpURLConnection获取文件长度
    */
-  public void onPreDownload(HttpURLConnection connection);
+  public void onPreDownload(long fileSize);
 
   /**
    * 下载监听
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadTarget.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadTarget.java
index 9aa0e471..fe1b255f 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadTarget.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/IDownloadTarget.java
@@ -7,8 +7,6 @@ import com.arialyy.downloadutil.core.inf.IDownloader;
 import com.arialyy.downloadutil.core.inf.ITask;
 import com.arialyy.downloadutil.core.pool.CachePool;
 import com.arialyy.downloadutil.core.pool.ExecutePool;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
 
 /**
  * Created by lyy on 2016/8/16.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Task.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/Task.java
similarity index 85%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/util/Task.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/core/Task.java
index a3db5a98..6506065d 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Task.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/Task.java
@@ -1,14 +1,10 @@
-package com.arialyy.downloadutil.util;
+package com.arialyy.downloadutil.core;
 
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Handler;
 import android.util.Log;
-import com.arialyy.downloadutil.core.DownloadManager;
-import com.arialyy.downloadutil.core.IDownloadTarget;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import java.net.HttpURLConnection;
 
 /**
  * Created by lyy on 2016/8/11.
@@ -131,10 +127,11 @@ public class Task {
     Handler outHandler;
     Context context;
     Intent  sendIntent;
-    long INTERVAL      = 1024 * 10;   //10k大小的间隔
-    long lastLen       = 0;   //上一次发送长度
-    long lastTime      = 0;
-    long INTERVAL_TIME = 60 * 1000;   //10k大小的间隔
+    long    INTERVAL      = 1024 * 10;   //10k大小的间隔
+    long    lastLen       = 0;   //上一次发送长度
+    long    lastTime      = 0;
+    long    INTERVAL_TIME = 1000;   //1m更新周期
+    boolean isFirst       = true;
     DownloadEntity downloadEntity;
 
     DownloadListener(Context context, DownloadEntity downloadEntity, Handler outHandler) {
@@ -145,10 +142,9 @@ public class Task {
       sendIntent.putExtra(DownloadManager.ENTITY, downloadEntity);
     }
 
-    @Override public void onPreDownload(HttpURLConnection connection) {
-      super.onPreDownload(connection);
-      long len = connection.getContentLength();
-      downloadEntity.setFileSize(len);
+    @Override public void onPreDownload(long fileSize) {
+      super.onPreDownload(fileSize);
+      downloadEntity.setFileSize(fileSize);
       downloadEntity.setState(DownloadEntity.STATE_DOWNLOAD_ING);
       sendIntent(DownloadManager.ACTION_PRE, -1);
     }
@@ -168,14 +164,19 @@ public class Task {
 
     @Override public void onProgress(long currentLocation) {
       super.onProgress(currentLocation);
-      //            if (currentLocation - lastLen > INTERVAL) { //不要太过于频繁发送广播
-      //                sendIntent.putExtra(DownloadManager.CURRENT_LOCATION, currentLocation);
-      //                lastLen = currentLocation;
-      //                context.sendBroadcast(sendIntent);
-      //            }
-      if (System.currentTimeMillis() - lastLen > INTERVAL_TIME) {
+      if (System.currentTimeMillis() - lastTime > INTERVAL_TIME) {
+        long speed = currentLocation - lastLen;
         sendIntent.putExtra(DownloadManager.CURRENT_LOCATION, currentLocation);
+        sendIntent.putExtra(DownloadManager.CURRENT_SPEED, speed);
         lastTime = System.currentTimeMillis();
+        if (isFirst) {
+          downloadEntity.setSpeed(0);
+          isFirst = false;
+        } else {
+          downloadEntity.setSpeed(speed);
+        }
+        downloadEntity.setCurrentProgress(currentLocation);
+        lastLen = currentLocation;
         context.sendBroadcast(sendIntent);
       }
     }
@@ -183,6 +184,7 @@ public class Task {
     @Override public void onStop(long stopLocation) {
       super.onStop(stopLocation);
       downloadEntity.setState(DownloadEntity.STATE_STOP);
+      downloadEntity.setSpeed(0);
       sendInState2Target(IDownloadTarget.STOP);
       sendIntent(DownloadManager.ACTION_STOP, stopLocation);
     }
@@ -199,13 +201,15 @@ public class Task {
       super.onComplete();
       downloadEntity.setState(DownloadEntity.STATE_COMPLETE);
       downloadEntity.setDownloadComplete(true);
+      downloadEntity.setSpeed(0);
       sendInState2Target(IDownloadTarget.COMPLETE);
-      sendIntent(DownloadManager.ACTION_COMPLETE, -1);
+      sendIntent(DownloadManager.ACTION_COMPLETE, downloadEntity.getFileSize());
     }
 
     @Override public void onFail() {
       super.onFail();
       downloadEntity.setState(DownloadEntity.STATE_FAIL);
+      downloadEntity.setSpeed(0);
       sendInState2Target(IDownloadTarget.FAIL);
       sendIntent(DownloadManager.ACTION_FAIL, -1);
     }
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/TaskFactory.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/TaskFactory.java
index 39986fd5..b80f6eda 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/TaskFactory.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/TaskFactory.java
@@ -2,8 +2,6 @@ package com.arialyy.downloadutil.core;
 
 import android.content.Context;
 import android.os.Handler;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
 
 /**
  * Created by lyy on 2016/8/18.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/AddCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/AddCommand.java
index 07a49983..ebcb5ce6 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/AddCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/AddCommand.java
@@ -2,8 +2,8 @@ package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
 import android.util.Log;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/8/22.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CancelCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CancelCommand.java
index 7a2b13a4..81773abd 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CancelCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CancelCommand.java
@@ -1,8 +1,8 @@
 package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/9/20.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CommandFactory.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CommandFactory.java
index e787f9a9..6bb35547 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CommandFactory.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/CommandFactory.java
@@ -1,7 +1,7 @@
 package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 
 /**
  * Created by Lyy on 2016/9/23.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCommand.java
index 9d1a011c..556272b4 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCommand.java
@@ -3,7 +3,7 @@ package com.arialyy.downloadutil.core.command;
 import android.content.Context;
 import com.arialyy.downloadutil.core.DownloadTarget;
 import com.arialyy.downloadutil.core.IDownloadTarget;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.help.CheckHelp;
 import com.arialyy.downloadutil.util.Util;
 
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StartCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StartCommand.java
index 13577b1a..acf86259 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StartCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StartCommand.java
@@ -1,8 +1,8 @@
 package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/8/22.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StateCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StateCommand.java
index 734e9cab..c351c971 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StateCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StateCommand.java
@@ -1,7 +1,7 @@
 package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 
 /**
  * Created by lyy on 2016/9/20.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StopCommand.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StopCommand.java
index fdd4c879..75848957 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StopCommand.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/StopCommand.java
@@ -2,8 +2,8 @@ package com.arialyy.downloadutil.core.command;
 
 import android.content.Context;
 import android.util.Log;
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/9/20.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IDownloader.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IDownloader.java
index d8a350e1..fc8e0d8e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IDownloader.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IDownloader.java
@@ -1,6 +1,6 @@
 package com.arialyy.downloadutil.core.inf;
 
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/8/16.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IPool.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IPool.java
index 298b3387..6b83219e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IPool.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/IPool.java
@@ -1,6 +1,6 @@
 package com.arialyy.downloadutil.core.inf;
 
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/8/14.
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/ITask.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/ITask.java
index 1a970a16..db68e044 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/ITask.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/inf/ITask.java
@@ -1,7 +1,7 @@
 package com.arialyy.downloadutil.core.inf;
 
-import com.arialyy.downloadutil.entity.DownloadEntity;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.Task;
 
 /**
  * Created by lyy on 2016/8/16.
@@ -29,7 +29,7 @@ public interface ITask {
    * 通过下载链接搜索下载任务
    *
    * @param entity 下载实体{@link DownloadEntity}
-   * @return {@code -1 ==> 错误}，{@link com.arialyy.downloadutil.entity.DownloadEntity#STATE_FAIL}
+   * @return {@code -1 ==> 错误}，{@link DownloadEntity#STATE_FAIL}
    */
   public int getTaskState(DownloadEntity entity);
 
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/CachePool.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/CachePool.java
index 19dacef3..c754690e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/CachePool.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/CachePool.java
@@ -3,7 +3,7 @@ package com.arialyy.downloadutil.core.pool;
 import android.text.TextUtils;
 import android.util.Log;
 import com.arialyy.downloadutil.core.inf.IPool;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.Task;
 import com.arialyy.downloadutil.util.Util;
 import java.util.HashMap;
 import java.util.Map;
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/ExecutePool.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/ExecutePool.java
index 1f1cd719..d1d82ff1 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/ExecutePool.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/pool/ExecutePool.java
@@ -3,7 +3,7 @@ package com.arialyy.downloadutil.core.pool;
 import android.text.TextUtils;
 import android.util.Log;
 import com.arialyy.downloadutil.core.inf.IPool;
-import com.arialyy.downloadutil.util.Task;
+import com.arialyy.downloadutil.core.Task;
 import com.arialyy.downloadutil.util.Util;
 import java.util.HashMap;
 import java.util.Map;
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java b/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java
index 587b4a50..321754da 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java
@@ -4,7 +4,7 @@ import android.content.res.Resources;
 import android.text.TextUtils;
 import android.util.Log;
 import com.arialyy.downloadutil.R;
-import com.arialyy.downloadutil.entity.DownloadEntity;
+import com.arialyy.downloadutil.core.DownloadEntity;
 import java.io.File;
 
 /**
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
index 43178fac..b882a06b 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
@@ -56,7 +56,7 @@ public class DbEntity {
   /**
    * 保存自身，如果表中已经有数据，则更新数据，否则插入数据
    */
-  public void save() {
+  public synchronized void save() {
     if (mUtil.tableExists(getClass()) && thisIsExist()) {
       update();
     } else {
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/SQLHelper.java b/downloadutil/src/main/java/com/arialyy/downloadutil/util/SQLHelper.java
deleted file mode 100644
index a2b603f3..00000000
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/SQLHelper.java
+++ /dev/null
@@ -1,163 +0,0 @@
-//package com.arialyy.downloadutil.util;
-//
-//import android.content.ContentValues;
-//import android.content.Context;
-//import android.database.Cursor;
-//import android.database.sqlite.SQLiteDatabase;
-//import android.database.sqlite.SQLiteOpenHelper;
-//import android.support.annotation.NonNull;
-//
-//import com.arialyy.downloadutil.entity.ConfigEntity;
-//
-//import java.util.ArrayList;
-//import java.util.List;
-//
-///**
-// * Created by lyy on 2016/8/11.
-// * 数据库帮助类
-// */
-//public class SQLHelper extends SQLiteOpenHelper {
-//    public static final String DB_NAME    = "ARIA_LYY_DB";
-//    public static final String TABLE_NAME = "ARIA_LYY_DOWNLOAD";
-//
-//    public SQLHelper(Context context) {
-//        this(context, DB_NAME, null, 1);
-//    }
-//
-//    private SQLHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
-//        super(context, name, factory, version);
-//    }
-//
-//    @Override
-//    public void onCreate(SQLiteDatabase db) {
-//        String sql = "create table " + TABLE_NAME + "(" +
-//                "url varchar PRIMARY KEY, " +
-//                "path varchar, " +
-//                "completeTime interger, " +
-//                "fileSize interger, " +
-//                "state smallint , " +
-//                "isDownloadComplete smallint, " +
-//                "currentProgress interger" +
-//                ")";
-//        db.execSQL(sql);
-//    }
-//
-//    @Override
-//    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
-//
-//    }
-//
-//    /**
-//     * 获取所有下载实体
-//     */
-//    public List<ConfigEntity> getAllEntity(@NonNull SQLiteDatabase db) {
-//        List<ConfigEntity> list = new ArrayList<>();
-//        Cursor               c    = db.query(TABLE_NAME, null, null, null, null, null, null);
-//        if (c.moveToFirst()) {
-//            while (c.moveToNext()) {
-//                list.insert(cursor2Entity(c));
-//            }
-//        }
-//        c.close();
-//        return list;
-//    }
-//
-//    /**
-//     * 更新下载实体
-//     */
-//    public void updateEntity(@NonNull SQLiteDatabase db, ConfigEntity entity) {
-//        String   whereClause = "url=?";
-//        String[] whereArgs   = {entity.getDownloadUrl()};
-//        db.update(TABLE_NAME, createCv(entity), whereClause, whereArgs);
-//    }
-//
-//    /**
-//     * 删除下载实体
-//     */
-//    public void delEntity(@NonNull SQLiteDatabase db, ConfigEntity entity) {
-//        delEntity(db, entity.getDownloadUrl());
-//    }
-//
-//    /**
-//     * 通过下载链接删除下载实体
-//     */
-//    public void delEntity(@NonNull SQLiteDatabase db, String downloadUrl) {
-//        String   whereClause = "url=?";
-//        String[] whereArgs   = {downloadUrl};
-//        db.delete(TABLE_NAME, whereClause, whereArgs);
-//    }
-//
-//    /**
-//     * 通过下载链接查找下载实体
-//     *
-//     * @param downloadUrl
-//     * @return
-//     */
-//    public ConfigEntity findEntity(@NonNull SQLiteDatabase db, @NonNull String downloadUrl) {
-//        ConfigEntity entity;
-//        String         sql = "select * from " + TABLE_NAME + "where url=?";
-//        Cursor         c   = db.rawQuery(sql, new String[]{downloadUrl});
-//        if (c.getCount() <= 0) {
-//            c.close();
-//            return null;
-//        } else {
-//            c.moveToFirst();
-//            entity = cursor2Entity(c);
-//        }
-//        c.close();
-//        return entity;
-//    }
-//
-//    /**
-//     * 存储下载实体
-//     *
-//     * @param entity
-//     */
-//    public void savaEntity(@NonNull SQLiteDatabase db, @NonNull ConfigEntity entity) {
-//        ConfigEntity temp = findEntity(db, entity.getDownloadUrl());
-//        if (temp == null) {
-//            db.insert(TABLE_NAME, null, createCv(entity));
-//        } else {
-//            updateEntity(db, entity);
-//        }
-//    }
-//
-//    /**
-//     * 游标转实体
-//     *
-//     * @param c
-//     * @return
-//     */
-//    private ConfigEntity cursor2Entity(Cursor c) {
-//        ConfigEntity entity;
-//        entity = new ConfigEntity();
-//        entity.setDownloadUrl(c.getString(c.getColumnIndex("url")));
-//        entity.setDownloadPath(c.getString(c.getColumnIndex("path")));
-//        entity.setCompleteTime(c.getLong(c.getColumnIndex("completeTime")));
-//        entity.setFileSize(c.getLong(c.getColumnIndex("fileSize")));
-//        entity.setState(c.getInt(c.getColumnIndex("state")));
-//        // 0 ==> false, 1 ==> true
-//        entity.setDownloadComplete(c.getInt(c.getColumnIndex("isDownloadComplete")) == 0);
-//        entity.setCurrentProgress(c.getLong(c.getColumnIndex("currentProgress")));
-//        return entity;
-//    }
-//
-//    /**
-//     * 创建ContentValues
-//     *
-//     * @param entity
-//     * @return
-//     */
-//    private ContentValues createCv(@NonNull ConfigEntity entity) {
-//        ContentValues cv = new ContentValues();
-//        cv.put("url", entity.getDownloadUrl());
-//        cv.put("path", entity.getDownloadPath());
-//        cv.put("completeTime", entity.getCompleteTime());
-//        cv.put("fileSize", entity.getFileSize());
-//        cv.put("state", entity.getState());
-//        // 0 ==> false, 1 ==> true
-//        cv.put("isDownloadComplete", entity.isDownloadComplete() ? 1 : 0);
-//        cv.put("currentProgress", entity.getCurrentProgress());
-//        return cv;
-//    }
-//}
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java b/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java
index 5ab2efd4..f1d68a7e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java
@@ -135,30 +135,31 @@ public class Util {
   public static String formatFileSize(double size) {
     double kiloByte = size / 1024;
     if (kiloByte < 1) {
-      return size + "Byte(s)";
+      return size + "b";
     }
 
     double megaByte = kiloByte / 1024;
     if (megaByte < 1) {
       BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
-      return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
+      return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "k";
     }
 
     double gigaByte = megaByte / 1024;
     if (gigaByte < 1) {
       BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
-      return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
+      return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "m";
     }
 
     double teraBytes = gigaByte / 1024;
     if (teraBytes < 1) {
       BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
-      return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
+      return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "g";
     }
     BigDecimal result4 = new BigDecimal(teraBytes);
-    return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
+    return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "t";
   }
 
+
   /**
    * 创建目录 当目录不存在的时候创建文件，否则返回false
    */