下载任务数支持修改

downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java

@@ -95,7 +95,7 @@ public class DownloadTaskQueue implements ITaskQueue {
   }
 
   @Override public void setDownloadNum(int downloadNum) {
-
+    mExecutePool.setDownloadNum(downloadNum);
   }
 
   @Override public Task createTask(DownloadEntity entity) {

downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/ExecutePool.java

@@ -65,7 +65,7 @@ public class ExecutePool implements IPool {
    *
    * @param downloadNum 下载数
    */
-  private void setDownloadNum(int downloadNum) {
+  public void setDownloadNum(int downloadNum) {
     try {
       ArrayBlockingQueue<Task> temp = new ArrayBlockingQueue<>(downloadNum);
       Task                     task;