修复 https://github.com/AriaLyy/Aria/issues/33

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

@@ -133,10 +133,7 @@ public class DownloadTask extends AbsTask<DownloadTaskEntity, DownloadEntity> {
    */
   @Override public void cancel() {
     if (!mEntity.isDownloadComplete()) {
-      mUtil.cancelDownload();
-      mUtil.delConfigFile();
-      mUtil.delTempFile();
-      mEntity.deleteData();
+      if (!mUtil.isDownloading()) {
         if (mOutHandler != null) {
           mOutHandler.obtainMessage(DownloadSchedulers.CANCEL, this).sendToTarget();
         }
@@ -145,6 +142,11 @@ public class DownloadTask extends AbsTask<DownloadTaskEntity, DownloadEntity> {
         intent.putExtra(Aria.DOWNLOAD_ENTITY, mEntity);
         mContext.sendBroadcast(intent);
       }
+      mUtil.cancelDownload();
+      mUtil.delConfigFile();
+      mUtil.delTempFile();
+      mEntity.deleteData();
+    }
   }
 
   public static class Builder {

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:3.1.5'
+compile 'com.arialyy.aria:Aria:3.1.6'
 ```
 
 ## 示例
@@ -277,6 +277,7 @@ Aria.download(this).load(DOWNLOAD_URL).setDownloadPath(PATH).setHighestPriority(
 
 
 ## 开发日志
+  + v_3.1.6 [取消任务时onTaskCancel回调两次的bug](https://github.com/AriaLyy/Aria/issues/33)
   + v_3.1.5 优化代码结构，增加优先下载任务功能。
   + 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_3.1.0 添加Aria配置文件，优化代码

app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java

@@ -241,6 +241,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
     @Override public void onTaskCancel(DownloadTask task) {
       if (task.getKey().equals(DOWNLOAD_URL)) {
         mUpdateHandler.sendEmptyMessage(DOWNLOAD_CANCEL);
+        L.d(TAG, "task__cancel");
       }
     }