some jni bug fixed.

app_main/src/main/res/drawable/ic_keyboard_arrow_left_grey_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#292929"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M15.41,16.09l-4.58,-4.59 4.58,-4.59L14,5.5l-6,6 6,6z"/>
+</vector>

app_main/src/main/res/layout/item_act_guide_banner1.xml

@@ -2,8 +2,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="16dp"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="16dp">
 
     <ImageView
         android:layout_width="wrap_content"
@@ -17,19 +17,19 @@
         android:layout_height="wrap_content"
         android:gravity="center">
 
-        <TextView
+        <ImageView
+            android:id="@+id/image_anim"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
-            android:text="@string/slide_to_next_page" />
+            android:layout_marginEnd="16dp"
+            android:src="@drawable/ic_keyboard_arrow_left_grey_24dp" />
 
-        <ImageView
-            android:id="@+id/image_anim"
+        <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
-            android:layout_marginStart="16dp"
-            android:src="@drawable/guide_arrow" />
+            android:text="@string/slide_to_next_page" />
 
     </LinearLayout>