fix bug https://github.com/AriaLyy/Aria/issues/84

Aria/src/main/java/com/arialyy/aria/core/command/normal/CancelAllCmd.java

@@ -16,7 +16,6 @@
 
 package com.arialyy.aria.core.command.normal;
 
-import com.arialyy.aria.core.download.DownloadGroupEntity;
 import com.arialyy.aria.core.download.DownloadTaskEntity;
 import com.arialyy.aria.core.inf.AbsTaskEntity;
 import com.arialyy.aria.core.upload.UploadTaskEntity;
@@ -40,7 +39,7 @@ final class CancelAllCmd<T extends AbsTaskEntity> extends AbsNormalCmd<T> {
     mQueue.removeAllTask();
     if (mTaskEntity instanceof DownloadTaskEntity) {
       handleDownloadRemove();
-    } else {
+    } else if (mTaskEntity instanceof UploadTaskEntity){
       handleUploadRemove();
     }
   }
@@ -50,6 +49,7 @@ final class CancelAllCmd<T extends AbsTaskEntity> extends AbsNormalCmd<T> {
    */
   private void handleUploadRemove() {
     List<UploadTaskEntity> allEntity = DbEntity.findAllData(UploadTaskEntity.class);
+    if (allEntity == null || allEntity.size() == 0) return;
     for (UploadTaskEntity entity : allEntity) {
       CommonUtil.delUploadTaskConfig(mTaskEntity.removeFile, entity);
     }
@@ -60,6 +60,7 @@ final class CancelAllCmd<T extends AbsTaskEntity> extends AbsNormalCmd<T> {
    */
   private void handleDownloadRemove() {
     List<DownloadTaskEntity> allEntity = DbEntity.findAllData(DownloadTaskEntity.class);
+    if (allEntity == null || allEntity.size() == 0) return;
     for (DownloadTaskEntity entity : allEntity) {
       CommonUtil.delDownloadTaskConfig(mTaskEntity.removeFile, entity);
     }

Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java

@@ -242,9 +242,6 @@ public class DownloadReceiver extends AbsReceiver {
 
     Set<String> keys = ariaManager.getReceiver().keySet();
     for (String key : keys) {
-      IReceiver receiver = ariaManager.getReceiver().get(key);
-      receiver.removeSchedulerListener();
-      receiver.unRegister();
       ariaManager.getReceiver().remove(key);
     }
   }

Aria/src/main/java/com/arialyy/aria/core/inf/IReceiver.java

@@ -24,37 +24,37 @@ public interface IReceiver<ENTITY extends IEntity> {
   /**
    * Receiver 销毁
    */
-  public void destroy();
+  void destroy();
 
   /**
    * 移除事件回调
    */
-  public void removeSchedulerListener();
+  void removeSchedulerListener();
 
   /**
    * 移除观察者
    */
-  public void unRegister();
+  void unRegister();
 
   /**
    * 停止所有任务
    */
-  public void stopAllTask();
+  void stopAllTask();
 
   /**
    * 删除所有任务
    */
-  public void removeAllTask(boolean removeFile);
+  void removeAllTask(boolean removeFile);
 
   /**
    * 任务是否存在
    *
    * @param key 下载时为下载路径，上传时为文件路径
    */
-  public boolean taskExists(String key);
+  boolean taskExists(String key);
 
   /**
    * 获取任务列表
    */
-  public List<ENTITY> getSimpleTaskList();
+  List<ENTITY> getSimpleTaskList();
 }