diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/normal/CancelAllCmd.java b/Aria/src/main/java/com/arialyy/aria/core/command/normal/CancelAllCmd.java
index 9c4181a5..dd47032e 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/normal/CancelAllCmd.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/normal/CancelAllCmd.java
@@ -28,6 +28,7 @@ import com.arialyy.aria.core.queue.UploadTaskQueue;
 import com.arialyy.aria.core.upload.UploadEntity;
 import com.arialyy.aria.core.upload.UploadTaskEntity;
 import com.arialyy.aria.orm.DbEntity;
+import com.arialyy.aria.util.ALog;
 import java.util.List;
 
 /**
@@ -99,6 +100,10 @@ public class CancelAllCmd<T extends AbsTaskEntity> extends AbsNormalCmd<T> {
   }
 
   private void remove(AbsTaskEntity te) {
+    if (te == null){
+      ALog.w(TAG, "取消任务失败，任务为空");
+      return;
+    }
     if (te instanceof DownloadTaskEntity) {
       mQueue = DownloadTaskQueue.getInstance();
     } else if (te instanceof UploadTaskEntity) {
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index cbae1869..adab4328 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -16,10 +16,9 @@
     <!--android:name=".test.TestActivity"-->
     <!--android:name=".test.AnyRunActivity"-->
     <!--android:name=".download.group.DownloadGroupActivity"-->
-    <!--android:name=".test.TestGroupActivity"-->
         <!--android:name=".MainActivity"-->
     <activity
-    android:name="com.arialyy.simple.test.AnyRunActivity"
+    android:name=".test.TestGroupActivity"
         android:label="@string/app_name">
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>