diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTask.java
index a165c564..e8d59788 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTask.java
@@ -16,10 +16,11 @@
 package com.arialyy.aria.core.download;
 
 import android.os.Handler;
+import android.os.Looper;
 import com.arialyy.aria.core.AriaManager;
+import com.arialyy.aria.core.common.IUtil;
 import com.arialyy.aria.core.download.downloader.DownloadGroupUtil;
 import com.arialyy.aria.core.download.downloader.FtpDirDownloadUtil;
-import com.arialyy.aria.core.common.IUtil;
 import com.arialyy.aria.core.inf.AbsGroupTask;
 import com.arialyy.aria.core.inf.AbsTaskEntity;
 import com.arialyy.aria.core.scheduler.ISchedulers;
@@ -44,7 +45,7 @@ public class DownloadGroupTask extends AbsGroupTask<DownloadGroupTaskEntity, Dow
       case AbsTaskEntity.HTTP:
         mUtil = new DownloadGroupUtil(mListener, mTaskEntity);
         break;
-      case  AbsTaskEntity.FTP_DIR:
+      case AbsTaskEntity.FTP_DIR:
         mUtil = new FtpDirDownloadUtil(mListener, mTaskEntity);
         break;
     }
@@ -93,7 +94,12 @@ public class DownloadGroupTask extends AbsGroupTask<DownloadGroupTaskEntity, Dow
      * @param schedulers {@link ISchedulers}
      */
     public DownloadGroupTask.Builder setOutHandler(ISchedulers schedulers) {
-      this.outHandler = new Handler(schedulers);
+      try {
+        outHandler = new Handler(schedulers);
+      } catch (Exception e) {
+        e.printStackTrace();
+        outHandler = new Handler(Looper.getMainLooper(), schedulers);
+      }
       return this;
     }
 
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 f54b6ffc..19283d3c 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
@@ -164,7 +164,12 @@ public class DownloadTask extends AbsNormalTask<DownloadEntity> {
      * @param schedulers {@link ISchedulers}
      */
     public Builder setOutHandler(ISchedulers schedulers) {
-      this.outHandler = new Handler(schedulers);
+      try {
+        outHandler = new Handler(schedulers);
+      } catch (Exception e) {
+        e.printStackTrace();
+        outHandler = new Handler(Looper.getMainLooper(), schedulers);
+      }
       return this;
     }
 
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 75f30546..381d3967 100644
--- a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
@@ -18,7 +18,6 @@ package com.arialyy.simple.download;
 
 import android.os.Bundle;
 import android.os.Environment;
-import android.os.Handler;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -27,11 +26,10 @@ import android.widget.RadioGroup;
 import android.widget.Toast;
 import butterknife.Bind;
 import com.arialyy.annotations.Download;
-import com.arialyy.aria.core.download.DownloadTarget;
 import com.arialyy.aria.core.Aria;
+import com.arialyy.aria.core.download.DownloadTarget;
 import com.arialyy.aria.core.download.DownloadTask;
 import com.arialyy.aria.core.inf.IEntity;
-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;
@@ -114,7 +112,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
     setBtState(false);
   }
 
-  @Download.onTaskStart(DOWNLOAD_URL) void taskStart(DownloadTask task) {
+  @Download.onTaskStart void taskStart(DownloadTask task) {
     getBinding().setFileSize(task.getConvertFileSize());
   }
 
@@ -188,11 +186,12 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   public void onClick(View view) {
     switch (view.getId()) {
       case R.id.start:
-        Aria.download(this)
+        Aria.download(SingleTaskActivity.this)
             .load(DOWNLOAD_URL)
             .addHeader("groupName", "value")
             .setDownloadPath(Environment.getExternalStorageDirectory().getPath() + "/gggg.apk")
             .start();
+
         break;
       case R.id.stop:
         Aria.download(this).load(DOWNLOAD_URL).stop();
diff --git a/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java b/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
index 669d8909..73d782db 100644
--- a/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
@@ -48,7 +48,7 @@ public class HttpUploadActivity extends BaseActivity<ActivityUploadBinding> {
   }
 
   @OnClick(R.id.upload) void upload() {
-    Aria.upload(this)
+    Aria.upload(HttpUploadActivity.this)
         .load(FILE_PATH)
         .setUploadUrl("http://172.18.104.66:8080/upload/sign_file")
         .setAttachment("file")
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 438a4dc0..832f9521 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
@@ -83,7 +83,12 @@ public class UploadTask extends AbsNormalTask<UploadEntity> {
     private String mTargetName;
 
     public void setOutHandler(ISchedulers outHandler) {
-      mOutHandler = new Handler(outHandler);
+      try {
+        mOutHandler = new Handler(outHandler);
+      } catch (Exception e) {
+        e.printStackTrace();
+        mOutHandler = new Handler(Looper.getMainLooper(), outHandler);
+      }
     }
 
     public void setUploadTaskEntity(UploadTaskEntity taskEntity) {
diff --git a/build.gradle b/build.gradle
index 3c54e7fd..133f0556 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,7 +37,7 @@ task clean(type: Delete) {
 ext {
   userOrg = 'arialyy'
   groupId = 'com.arialyy.aria'
-  publishVersion = '3.2.16'
+  publishVersion = '3.2.17'
   repoName='maven'
   desc = 'android 下载框架'
   website = 'https://github.com/AriaLyy/Aria'