diff --git a/Aria/build.gradle b/Aria/build.gradle
index 1e811256..c28c0ade 100644
--- a/Aria/build.gradle
+++ b/Aria/build.gradle
@@ -7,8 +7,8 @@ android {
   defaultConfig {
     minSdkVersion 9
     targetSdkVersion 23
-    versionCode 313
-    versionName "3.1.3"
+    versionCode 314
+    versionName "3.1.4"
   }
   buildTypes {
     release {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/Aria.java b/Aria/src/main/java/com/arialyy/aria/core/Aria.java
index 4b3fb688..241c0fb6 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/Aria.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/Aria.java
@@ -174,6 +174,15 @@ import com.arialyy.aria.core.upload.UploadTask;
    */
   public static class UploadSchedulerListener implements ISchedulerListener<UploadTask> {
 
+    /**
+     * 预处理，有时有些地址链接比较慢，这时可以先在这个地方出来一些界面上的UI，如按钮的状态。
+     *
+     * @param url 任务上传地址
+     */
+    @Override public void onPre(String url) {
+
+    }
+
     @Override public void onTaskPre(UploadTask task) {
 
     }
@@ -212,6 +221,14 @@ import com.arialyy.aria.core.upload.UploadTask;
    */
   public static class DownloadSchedulerListener
       implements IDownloadSchedulerListener<DownloadTask> {
+    /**
+     * 预处理，有时有些地址链接比较慢，这时可以先在这个地方出来一些界面上的UI，如按钮的状态。
+     *
+     * @param url 任务下载地址
+     */
+    @Override public void onPre(String url) {
+
+    }
 
     @Override public void onTaskPre(DownloadTask task) {
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
index 385220f5..bb394588 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
@@ -302,6 +302,7 @@ public class DownloadTask implements ITask {
     @Override public void onPre() {
       super.onPre();
       downloadEntity.setState(DownloadEntity.STATE_PRE);
+      sendInState2Target(ISchedulers.PRE);
       sendIntent(Aria.ACTION_PRE, -1);
     }
 
@@ -309,21 +310,21 @@ public class DownloadTask implements ITask {
       super.onPostPre(fileSize);
       downloadEntity.setFileSize(fileSize);
       downloadEntity.setState(DownloadEntity.STATE_POST_PRE);
-      sendInState2Target(DownloadSchedulers.PRE);
+      sendInState2Target(ISchedulers.POST_PRE);
       sendIntent(Aria.ACTION_POST_PRE, -1);
     }
 
     @Override public void onResume(long resumeLocation) {
       super.onResume(resumeLocation);
       downloadEntity.setState(DownloadEntity.STATE_RUNNING);
-      sendInState2Target(DownloadSchedulers.RESUME);
+      sendInState2Target(ISchedulers.RESUME);
       sendIntent(Aria.ACTION_RESUME, resumeLocation);
     }
 
     @Override public void onStart(long startLocation) {
       super.onStart(startLocation);
       downloadEntity.setState(DownloadEntity.STATE_RUNNING);
-      sendInState2Target(DownloadSchedulers.START);
+      sendInState2Target(ISchedulers.START);
       sendIntent(Aria.ACTION_START, startLocation);
     }
 
@@ -341,7 +342,7 @@ public class DownloadTask implements ITask {
         handleSpeed(speed);
         downloadEntity.setCurrentProgress(currentLocation);
         lastLen = currentLocation;
-        sendInState2Target(DownloadSchedulers.RUNNING);
+        sendInState2Target(ISchedulers.RUNNING);
         context.sendBroadcast(sendIntent);
       }
     }
@@ -350,7 +351,7 @@ public class DownloadTask implements ITask {
       super.onStop(stopLocation);
       downloadEntity.setState(DownloadEntity.STATE_STOP);
       handleSpeed(0);
-      sendInState2Target(DownloadSchedulers.STOP);
+      sendInState2Target(ISchedulers.STOP);
       sendIntent(Aria.ACTION_STOP, stopLocation);
     }
 
@@ -358,7 +359,7 @@ public class DownloadTask implements ITask {
       super.onCancel();
       downloadEntity.setState(DownloadEntity.STATE_CANCEL);
       handleSpeed(0);
-      sendInState2Target(DownloadSchedulers.CANCEL);
+      sendInState2Target(ISchedulers.CANCEL);
       sendIntent(Aria.ACTION_CANCEL, -1);
       downloadEntity.deleteData();
     }
@@ -368,7 +369,7 @@ public class DownloadTask implements ITask {
       downloadEntity.setState(DownloadEntity.STATE_COMPLETE);
       downloadEntity.setDownloadComplete(true);
       handleSpeed(0);
-      sendInState2Target(DownloadSchedulers.COMPLETE);
+      sendInState2Target(ISchedulers.COMPLETE);
       sendIntent(Aria.ACTION_COMPLETE, downloadEntity.getFileSize());
     }
 
@@ -377,7 +378,7 @@ public class DownloadTask implements ITask {
       downloadEntity.setFailNum(downloadEntity.getFailNum() + 1);
       downloadEntity.setState(DownloadEntity.STATE_FAIL);
       handleSpeed(0);
-      sendInState2Target(DownloadSchedulers.FAIL);
+      sendInState2Target(ISchedulers.FAIL);
       sendIntent(Aria.ACTION_FAIL, -1);
     }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
index f6bd01a3..24645a08 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
@@ -28,6 +28,7 @@ import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.Properties;
+import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
@@ -367,7 +368,18 @@ class DownloadUtil implements IDownloadUtil, Runnable {
     if (pro.isEmpty()) {
       handleNewTask();
     } else {
-      THREAD_NUM = pro.keySet().size();
+      Set<Object> keys = pro.keySet();
+      int num = 0;
+      for (Object key : keys) {
+        if (String.valueOf(key).contains("_record_")) {
+          num++;
+        }
+      }
+      if (num == 0){
+        handleNewTask();
+        return pro;
+      }
+      THREAD_NUM = num;
       for (int i = 0; i < THREAD_NUM; i++) {
         if (pro.getProperty(mDownloadFile.getName() + "_record_" + i) == null) {
           Object state = pro.getProperty(mDownloadFile.getName() + "_state_" + i);
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/IDownloadListener.java b/Aria/src/main/java/com/arialyy/aria/core/download/IDownloadListener.java
index 8d60217c..0e805e35 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/IDownloadListener.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/IDownloadListener.java
@@ -39,7 +39,7 @@ interface IDownloadListener {
   public void onFail();
 
   /**
-   * 预处理
+   * 预处理，有时有些地址链接比较慢，这时可以先在这个地方出来一些界面上的UI，如按钮的状态
    */
   public void onPre();
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/SingleThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/SingleThreadTask.java
index 1ca9fe1b..65ceba81 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/SingleThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/SingleThreadTask.java
@@ -113,8 +113,7 @@ final class SingleThreadTask implements Runnable {
       //支持断点的处理
       if (mConfigEntity.isSupportBreakpoint) {
         Log.i(TAG, "线程【" + mConfigEntity.THREAD_ID + "】下载完毕");
-        writeConfig(mConfigEntity.TEMP_FILE.getName() + "_state_" + mConfigEntity.THREAD_ID,
-            1 + "");
+        writeConfig(mConfigEntity.TEMP_FILE.getName() + "_state_" + mConfigEntity.THREAD_ID, 1);
         mListener.onChildComplete(mConfigEntity.END_LOCATION);
         CONSTANCE.COMPLETE_THREAD_NUM++;
         if (CONSTANCE.isComplete()) {
@@ -151,13 +150,12 @@ final class SingleThreadTask implements Runnable {
       try {
         if (mConfigEntity.isSupportBreakpoint) {
           CONSTANCE.STOP_NUM++;
-          String location = String.valueOf(mChildCurrentLocation);
           Log.d(TAG, "thread_"
               + mConfigEntity.THREAD_ID
               + "_stop, stop location ==> "
               + mChildCurrentLocation);
           writeConfig(mConfigEntity.TEMP_FILE.getName() + "_record_" + mConfigEntity.THREAD_ID,
-              location);
+              mChildCurrentLocation);
           if (CONSTANCE.isStop()) {
             Log.d(TAG, "++++++++++++++++ onStop +++++++++++++++++");
             CONSTANCE.isDownloading = false;
@@ -226,10 +224,8 @@ final class SingleThreadTask implements Runnable {
           Log.e(TAG, CommonUtil.getPrintException(ex));
         }
         if (mConfigEntity.isSupportBreakpoint) {
-          if (currentLocation != -1) {
-            String location = String.valueOf(currentLocation);
-            writeConfig(dEntity.TEMP_FILE.getName() + "_record_" + dEntity.THREAD_ID, location);
-          }
+          writeConfig(dEntity.TEMP_FILE.getName() + "_record_" + dEntity.THREAD_ID,
+              currentLocation);
           if (CONSTANCE.isFail()) {
             Log.d(TAG, "++++++++++++++++ onFail +++++++++++++++++");
             mListener.onFail();
@@ -247,10 +243,12 @@ final class SingleThreadTask implements Runnable {
   /**
    * 将记录写入到配置文件
    */
-  private void writeConfig(String key, String record) throws IOException {
-    File configFile = new File(mConfigFPath);
-    Properties pro = CommonUtil.loadConfig(configFile);
-    pro.setProperty(key, record);
-    CommonUtil.saveConfig(configFile, pro);
+  private void writeConfig(String key, long record) throws IOException {
+    if (record != -1 && record != 0) {
+      File configFile = new File(mConfigFPath);
+      Properties pro = CommonUtil.loadConfig(configFile);
+      pro.setProperty(key, String.valueOf(record));
+      CommonUtil.saveConfig(configFile, pro);
+    }
   }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java b/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
index 90eaa811..620138d8 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
@@ -128,6 +128,12 @@ public class DownloadSchedulers implements ISchedulers<DownloadTask> {
         return;
       }
       switch (state) {
+        case PRE:
+          listener.onPre(task.getKey());
+          break;
+        case POST_PRE:
+          listener.onTaskPre(task);
+          break;
         case RUNNING:
           listener.onTaskRunning(task);
           break;
@@ -140,9 +146,6 @@ public class DownloadSchedulers implements ISchedulers<DownloadTask> {
         case RESUME:
           listener.onTaskResume(task);
           break;
-        case PRE:
-          listener.onTaskPre(task);
-          break;
         case CANCEL:
           listener.onTaskCancel(task);
           break;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulerListener.java b/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulerListener.java
index 8bb54b2e..7a37277c 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulerListener.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulerListener.java
@@ -22,7 +22,13 @@ import com.arialyy.aria.core.inf.ITask;
  */
 public interface ISchedulerListener<TASK extends ITask> {
   /**
-   * 任务预加载
+   * 预处理，有时有些地址链接比较慢，这时可以先在这个地方出来一些界面上的UI，如按钮的状态。
+   * 在这个回调中，任务是获取不到文件大小，下载速度等参数
+   */
+  public void onPre(String url);
+
+  /**
+   * 任务预加载完成
    */
   public void onTaskPre(TASK task);
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulers.java b/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulers.java
index 908d0861..5722eb87 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulers.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/scheduler/ISchedulers.java
@@ -27,39 +27,44 @@ public interface ISchedulers<Task extends ITask> extends Handler.Callback {
   /**
    * 断点支持
    */
-  public static final int SUPPORT_BREAK_POINT = 8;
+  public static final int SUPPORT_BREAK_POINT = 9;
   /**
    * 任务预加载
    */
   public static final int PRE = 0;
+  /**
+   * 任务预加载完成
+   */
+  public static final int POST_PRE = 1;
+
   /**
    * 任务开始
    */
-  public static final int START = 1;
+  public static final int START = 2;
   /**
    * 任务停止
    */
-  public static final int STOP = 2;
+  public static final int STOP = 3;
   /**
    * 任务失败
    */
-  public static final int FAIL = 3;
+  public static final int FAIL = 4;
   /**
    * 任务取消
    */
-  public static final int CANCEL = 4;
+  public static final int CANCEL = 5;
   /**
    * 任务完成
    */
-  public static final int COMPLETE = 5;
+  public static final int COMPLETE = 6;
   /**
    * 任务处理中
    */
-  public static final int RUNNING = 6;
+  public static final int RUNNING = 7;
   /**
    * 恢复任务
    */
-  public static final int RESUME = 7;
+  public static final int RESUME = 8;
 
   /**
    * 注册下载器监听，一个观察者只能注册一次监听
diff --git a/Aria/src/main/java/com/arialyy/aria/core/scheduler/UploadSchedulers.java b/Aria/src/main/java/com/arialyy/aria/core/scheduler/UploadSchedulers.java
index ef6b0b72..349954f6 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/scheduler/UploadSchedulers.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/scheduler/UploadSchedulers.java
@@ -131,6 +131,12 @@ public class UploadSchedulers implements ISchedulers<UploadTask> {
         return;
       }
       switch (state) {
+        case PRE:
+          listener.onPre(task.getKey());
+          break;
+        case POST_PRE:
+          listener.onTaskPre(task);
+          break;
         case RUNNING:
           listener.onTaskRunning(task);
           break;
@@ -143,9 +149,6 @@ public class UploadSchedulers implements ISchedulers<UploadTask> {
         case RESUME:
           listener.onTaskResume(task);
           break;
-        case PRE:
-          listener.onTaskPre(task);
-          break;
         case CANCEL:
           listener.onTaskCancel(task);
           break;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/IUploadListener.java b/Aria/src/main/java/com/arialyy/aria/core/upload/IUploadListener.java
index f8044a39..5f51824b 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/IUploadListener.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/IUploadListener.java
@@ -26,10 +26,15 @@ public interface IUploadListener {
    */
   public void onPre();
 
+  /**
+   * 预处理完成
+   */
+  public void onPostPre(long fileSize);
+
   /**
    * 开始上传
    */
-  public void onStart(long fileSize);
+  public void onStart();
 
   /**
    * 恢复上传
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadListener.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadListener.java
index 94dce03d..59c71b8e 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadListener.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadListener.java
@@ -24,7 +24,11 @@ public class UploadListener implements IUploadListener {
 
   }
 
-  @Override public void onStart(long fileSize) {
+  @Override public void onPostPre(long fileSize) {
+
+  }
+
+  @Override public void onStart() {
 
   }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTask.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTask.java
index f8146a41..d4d555bd 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTask.java
@@ -214,10 +214,17 @@ public class UploadTask implements ITask {
       sendInState2Target(ISchedulers.PRE);
     }
 
-    @Override public void onStart(long fileSize) {
+    @Override public void onPostPre(long fileSize) {
+      super.onPostPre(fileSize);
       uploadEntity.setFileSize(fileSize);
+      uploadEntity.setState(IEntity.STATE_POST_PRE);
+      sendIntent(Aria.ACTION_POST_PRE, 0);
+      sendInState2Target(ISchedulers.POST_PRE);
+    }
+
+    @Override public void onStart() {
       uploadEntity.setState(IEntity.STATE_RUNNING);
-      sendIntent(Aria.ACTION_PRE, -1);
+      sendIntent(Aria.ACTION_START, 0);
       sendInState2Target(ISchedulers.START);
     }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
index 5126660d..228dc97d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
@@ -99,6 +99,8 @@ final class UploadUtil implements Runnable {
       }
 
       mOutputStream = mHttpConn.getOutputStream();
+      mListener.onPostPre(uploadFile.length());
+
       PrintWriter writer =
           new PrintWriter(new OutputStreamWriter(mOutputStream, mTaskEntity.charset), true);
 
@@ -107,7 +109,7 @@ final class UploadUtil implements Runnable {
       for (String key : keys) {
         addFormField(writer, key, mTaskEntity.formFields.get(key));
       }
-      mListener.onStart(uploadFile.length());
+      mListener.onStart();
       uploadFile(writer, mTaskEntity.attachment, uploadFile);
       Log.d(TAG, finish(writer) + "");
     } catch (IOException e) {
diff --git a/README.md b/README.md
index 0cb11dd4..992c5e3a 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Aria怎样使用？
 ## 下载
 [![Download](https://api.bintray.com/packages/arialyy/maven/Aria/images/download.svg)](https://bintray.com/arialyy/maven/Aria/_latestVersion)</br>
 ```java
-compile 'com.arialyy.aria:Aria:3.1.3'
+compile 'com.arialyy.aria:Aria:3.1.4'
 ```
 
 ## 示例
@@ -266,6 +266,7 @@ Aria.download(this).removeAllTask();
 
 
 ## 开发日志
+  + v_3.1.4 修复快速切换，暂停、恢复功能时，概率性出现的重新下载问题，添加onPre()回调，onPre()用于请求地址之前执行界面UI更新操作。
   + v_3.1.2 优化代码结构
   + v_3.1.0 添加Aria配置文件，优化代码
   + v_3.0.3 修复暂停后删除任务，闪退问题，添加删除记录的api
diff --git a/app/src/main/java/com/arialyy/simple/download/DownloadDialog.java b/app/src/main/java/com/arialyy/simple/download/DownloadDialog.java
index ffc5e6ef..e4a92340 100644
--- a/app/src/main/java/com/arialyy/simple/download/DownloadDialog.java
+++ b/app/src/main/java/com/arialyy/simple/download/DownloadDialog.java
@@ -44,7 +44,7 @@ public class DownloadDialog extends AbsDialog {
   @Bind(R.id.speed) TextView mSpeed;
 
   private static final String DOWNLOAD_URL =
-      "http://clashroyalecdn.static.kunlun.com/Clash_Royale-1.2.6-kunlun_landing_page-release.apk.apk";
+      "http://static.gaoshouyou.com/d/4b/d7/e04b308d9cd7f0ad4cac18d1a514544c.apk";
 
   public DownloadDialog(Context context) {
     super(context);
@@ -77,7 +77,7 @@ public class DownloadDialog extends AbsDialog {
       case R.id.start:
         Aria.download(this)
             .load(DOWNLOAD_URL)
-            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/daialog.apk")
+            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/飞机大战.apk")
             .start();
         break;
       case R.id.stop:
@@ -122,14 +122,10 @@ public class DownloadDialog extends AbsDialog {
 
     @Override public void onTaskRunning(DownloadTask task) {
       super.onTaskRunning(task);
-      long current = task.getCurrentProgress();
-      long len = task.getFileSize();
-      if (len == 0) {
-        mPb.setProgress(0);
-      } else {
-        mPb.setProgress((int) ((current * 100) / len));
+      if (task.getKey().equals(DOWNLOAD_URL)) {
+        mPb.setProgress(task.getPercent());
+        mSpeed.setText(task.getConvertSpeed());
       }
-      mSpeed.setText(task.getConvertSpeed());
     }
   }
 }
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 8269134b..f87865c1 100644
--- a/app/src/main/java/com/arialyy/simple/download/DownloadModule.java
+++ b/app/src/main/java/com/arialyy/simple/download/DownloadModule.java
@@ -178,7 +178,7 @@ public class DownloadModule extends BaseModule {
           case Aria.ACTION_POST_PRE:
             DownloadEntity entity = intent.getParcelableExtra(Aria.DOWNLOAD_ENTITY);
             len = entity.getFileSize();
-            L.d(TAG, "download pre");
+            L.d(TAG, "download onPre");
             handler.obtainMessage(SingleTaskActivity.DOWNLOAD_PRE, len).sendToTarget();
             break;
           case Aria.ACTION_START:
diff --git a/app/src/main/java/com/arialyy/simple/download/DownloadPopupWindow.java b/app/src/main/java/com/arialyy/simple/download/DownloadPopupWindow.java
index 538f320d..b82de2bc 100644
--- a/app/src/main/java/com/arialyy/simple/download/DownloadPopupWindow.java
+++ b/app/src/main/java/com/arialyy/simple/download/DownloadPopupWindow.java
@@ -46,7 +46,7 @@ public class DownloadPopupWindow extends AbsPopupWindow {
   @Bind(R.id.speed) TextView mSpeed;
 
   private static final String DOWNLOAD_URL =
-      "http://static.gaoshouyou.com/d/3a/93/573ae1db9493a801c24bf66128b11e39.apk";
+      "http://static.gaoshouyou.com/d/25/57/2e25bd9d4557ba31e9beebacfaf9e804.apk";
 
   public DownloadPopupWindow(Context context) {
     super(context, new ColorDrawable(Color.WHITE));
@@ -79,7 +79,7 @@ public class DownloadPopupWindow extends AbsPopupWindow {
       case R.id.start:
         Aria.download(this)
             .load(DOWNLOAD_URL)
-            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/daialog.apk")
+            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/消消乐.apk")
             .start();
         break;
       case R.id.stop:
diff --git a/app/src/main/java/com/arialyy/simple/download/SimpleNotification.java b/app/src/main/java/com/arialyy/simple/download/SimpleNotification.java
index 9adcd304..39cc5d8e 100644
--- a/app/src/main/java/com/arialyy/simple/download/SimpleNotification.java
+++ b/app/src/main/java/com/arialyy/simple/download/SimpleNotification.java
@@ -30,7 +30,7 @@ import com.arialyy.simple.R;
 
 public class SimpleNotification {
   private static final String DOWNLOAD_URL =
-      "http://static.gaoshouyou.com/d/6e/e5/ff6ecaaf45e532e6d07747af82357472.apk";
+      "http://static.gaoshouyou.com/d/cb/38/f0cb1b2c57388fe14342eecd64bbae65.apk";
 
   private NotificationManager mManager;
   private Context mContext;
@@ -58,7 +58,7 @@ public class SimpleNotification {
         .load(DOWNLOAD_URL)
         .setDownloadName("notification_test.apk")
         .setDownloadPath(
-            Environment.getExternalStorageDirectory() + "/Download/notification_test.apk")
+            Environment.getExternalStorageDirectory() + "/Download/消灭星星.apk")
         .start();
   }
 
diff --git a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
index 7b4dd7d6..b61773ab 100644
--- a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
@@ -24,6 +24,7 @@ import android.os.Environment;
 import android.os.Handler;
 import android.os.Message;
 import android.support.v7.widget.Toolbar;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.RadioGroup;
@@ -243,6 +244,11 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
 
   private class MySchedulerListener extends Aria.DownloadSchedulerListener {
 
+    @Override public void onPre(String url) {
+      super.onPre(url);
+      Log.d(TAG, "url ==> " + url);
+    }
+
     @Override public void onNoSupportBreakPoint(DownloadTask task) {
       super.onNoSupportBreakPoint(task);
       T.showShort(SingleTaskActivity.this, "该下载链接不支持断点");
diff --git a/app/src/main/java/com/arialyy/simple/download/fragment_download/DownloadFragment.java b/app/src/main/java/com/arialyy/simple/download/fragment_download/DownloadFragment.java
index bb90e783..3365a4be 100644
--- a/app/src/main/java/com/arialyy/simple/download/fragment_download/DownloadFragment.java
+++ b/app/src/main/java/com/arialyy/simple/download/fragment_download/DownloadFragment.java
@@ -45,7 +45,7 @@ public class DownloadFragment extends AbsFragment<FragmentDownloadBinding> {
   @Bind(R.id.speed) TextView mSpeed;
 
   private static final String DOWNLOAD_URL =
-      "http://rs.0.gaoshouyou.com/d/90/d7/7490c6fd6cd733bef336e766778507c5.apk";
+      "http://static.ilongyuan.cn/rayark/RayarkFZ_2.0.7.apk";
 
   @Override protected void init(Bundle savedInstanceState) {
     if (Aria.download(this).taskExists(DOWNLOAD_URL)) {
@@ -73,7 +73,7 @@ public class DownloadFragment extends AbsFragment<FragmentDownloadBinding> {
       case R.id.start:
         Aria.download(this)
             .load(DOWNLOAD_URL)
-            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/daialog.apk")
+            .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/兰空VOEZ.apk")
             .start();
         break;
       case R.id.stop:
diff --git a/app/src/main/java/com/arialyy/simple/download/multi_download/DownloadAdapter.java b/app/src/main/java/com/arialyy/simple/download/multi_download/DownloadAdapter.java
index 7d5bb80f..4342f4d2 100644
--- a/app/src/main/java/com/arialyy/simple/download/multi_download/DownloadAdapter.java
+++ b/app/src/main/java/com/arialyy/simple/download/multi_download/DownloadAdapter.java
@@ -70,7 +70,7 @@ final class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapter
       notifyDataSetChanged();
     } else {
       int position = indexItem(entity.getDownloadUrl());
-      if (position == -1) {
+      if (position == -1 || position >= mData.size()) {
         return;
       }
       mData.set(position, entity);
@@ -81,7 +81,7 @@ final class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapter
   public synchronized void setProgress(DownloadEntity entity) {
     String url = entity.getDownloadUrl();
     int position = indexItem(url);
-    if (position == -1) {
+    if (position == -1 || position >= mData.size()) {
       return;
     }
 
@@ -169,6 +169,7 @@ final class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapter
         case DownloadEntity.STATE_FAIL:
         case DownloadEntity.STATE_STOP:
         case DownloadEntity.STATE_COMPLETE:
+        case DownloadEntity.STATE_POST_PRE:
           start(entity);
           break;
         case DownloadEntity.STATE_RUNNING:
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 c54733be..1a22f3b4 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
@@ -61,7 +61,7 @@ public class MultiDownloadActivity extends BaseActivity<ActivityMultiDownloadBin
   private class MySchedulerListener extends Aria.DownloadSchedulerListener {
     @Override public void onTaskPre(DownloadTask task) {
       super.onTaskPre(task);
-      L.d(TAG, "download pre");
+      L.d(TAG, "download onPre");
       mAdapter.updateState(task.getDownloadEntity());
     }
 
diff --git a/app/src/main/java/com/arialyy/simple/upload/UploadActivity.java b/app/src/main/java/com/arialyy/simple/upload/UploadActivity.java
index 87fa2772..d6597b7e 100644
--- a/app/src/main/java/com/arialyy/simple/upload/UploadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/upload/UploadActivity.java
@@ -24,6 +24,7 @@ import butterknife.OnClick;
 import com.arialyy.aria.core.Aria;
 import com.arialyy.aria.core.upload.UploadTask;
 import com.arialyy.frame.util.FileUtil;
+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;
@@ -35,6 +36,7 @@ import java.lang.ref.WeakReference;
  * Created by Aria.Lao on 2017/2/9.
  */
 public class UploadActivity extends BaseActivity<ActivityUploadMeanBinding> {
+  private static final String TAG = "UploadActivity";
   @Bind(R.id.pb) HorizontalProgressBarWithNumber mPb;
   private static final int START = 0;
   private static final int STOP = 1;
@@ -106,6 +108,16 @@ public class UploadActivity extends BaseActivity<ActivityUploadMeanBinding> {
       this.handler = new WeakReference<>(handler);
     }
 
+    @Override public void onPre(String url) {
+      super.onPre(url);
+      L.e(TAG, "url ==> " + url);
+    }
+
+    @Override public void onTaskPre(UploadTask task) {
+      super.onTaskPre(task);
+      L.d(TAG, "fileSize = " + task.getConvertFileSize());
+    }
+
     @Override public void onTaskStart(UploadTask task) {
       super.onTaskStart(task);
       handler.get().obtainMessage(START, task).sendToTarget();