diff --git a/app/src/main/java/com/hjx/parent/HomeworkFeedbackActivity.java b/app/src/main/java/com/hjx/parent/HomeworkFeedbackActivity.java
index ea40a0b..80f9698 100644
--- a/app/src/main/java/com/hjx/parent/HomeworkFeedbackActivity.java
+++ b/app/src/main/java/com/hjx/parent/HomeworkFeedbackActivity.java
@@ -111,6 +111,8 @@ public class HomeworkFeedbackActivity extends BaseRxActivity<ActivityHomeworkFee
 
                         setResult(RESULT_OK);
                         finish();
+                    } else {
+                        Toast.makeText(this, "反馈失败", Toast.LENGTH_SHORT).show();
                     }
                 });
     }
diff --git a/app/src/main/res/layout/activity_homework_feedback.xml b/app/src/main/res/layout/activity_homework_feedback.xml
index 59fd350..b485da1 100644
--- a/app/src/main/res/layout/activity_homework_feedback.xml
+++ b/app/src/main/res/layout/activity_homework_feedback.xml
@@ -227,7 +227,8 @@
                     android:layout_height="40dp"/>
                 <EditText
                     android:id="@+id/etComment"
-                    android:hint="非必填"
+                    android:hint="非必填, 不超过300字"
+                    android:maxLength="300"
                     android:textSize="13sp"
                     android:textColor="#333"
                     android:textColorHint="#999"