diff --git a/app/src/main/java/com/nova/brain/glass/ui/ChatActivity.kt b/app/src/main/java/com/nova/brain/glass/ui/ChatActivity.kt
index bbed42f..d336491 100644
--- a/app/src/main/java/com/nova/brain/glass/ui/ChatActivity.kt
+++ b/app/src/main/java/com/nova/brain/glass/ui/ChatActivity.kt
@@ -3,6 +3,7 @@ package com.nova.brain.glass.ui
 import android.view.View
 import android.widget.TextView
 import com.nova.brain.glass.R
+import com.nova.brain.glass.helper.BgChatDrawable
 import com.nova.brain.glass.databinding.ActivityChatBinding
 import com.nova.brain.glass.helper.OfflineCmdListener
 import com.nova.brain.glass.helper.OfflineCmdServiceHelper
@@ -60,6 +61,10 @@ class ChatActivity : BaseListFormLayoutNormalActivity<ChatItem, ChatVM, Activity
         }
     }
 
+    override fun lateInitView() {
+        recyclerView.background = BgChatDrawable(resources.displayMetrics.density)
+    }
+
     override fun onResume() {
         super.onResume()
         OfflineCmdServiceHelper.addOnLineListener(listener)
diff --git a/app/src/main/res/layout/activity_chat.xml b/app/src/main/res/layout/activity_chat.xml
index a77df26..b15ffdd 100644
--- a/app/src/main/res/layout/activity_chat.xml
+++ b/app/src/main/res/layout/activity_chat.xml
@@ -11,7 +11,6 @@
             app:layout_constraintStart_toStartOf="parent"
             android:layout_width="match_parent"
             android:layout_height="400dp"
-            android:background="@drawable/bg_chat"
             android:overScrollMode="never" />
         <ProgressBar
             android:id="@+id/pb"
@@ -19,8 +18,8 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintBottom_toBottomOf="@+id/baseRecyclerView"
-            android:layout_width="50dp"
-            android:layout_height="50dp"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
             android:indeterminateDrawable="@drawable/load_progress" />
 
         <TextView
diff --git a/base/src/main/res/drawable/load_progress.xml b/base/src/main/res/drawable/load_progress.xml
index 06f6e66..17b1380 100644
--- a/base/src/main/res/drawable/load_progress.xml
+++ b/base/src/main/res/drawable/load_progress.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <rotate xmlns:android="http://schemas.android.com/apk/res/android"
-        android:drawable="@drawable/ic_loading"
+        android:drawable="@drawable/loading"
         android:fromDegrees="0"
         android:pivotX="50%"
         android:pivotY="50%"
diff --git a/base/src/main/res/drawable/loading.png b/base/src/main/res/drawable/loading.png
new file mode 100644
index 0000000..4748df9
Binary files /dev/null and b/base/src/main/res/drawable/loading.png differ