修改bug

student/src/main/java/com/cooleshow/student/ui/work/HomeWorkDetailActivity.java

@@ -230,6 +230,7 @@ public class HomeWorkDetailActivity extends BaseMVPActivity<ActivityHomeworkDeta
         if (!checkActivityExist()) {
             return;
         }
+        isChangeHomeWork = false;
         ToastUtil.getInstance().showShort("提交成功");
         refresh();
     }