添加图片按钮的xml文件

MiNote/app/src/main/res/layout/note_edit.xml

@@ -57,10 +57,14 @@
                 android:textAppearance="@style/TextAppearanceSecondaryItem" />
 
             <ImageButton
+                android:id="@+id/add_img_btn"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:background="@drawable/bg_btn_set_color" />
+                android:layout_marginLeft="7dp"
+                android:layout_marginTop="600dp"
+                android:layout_marginBottom="7dp"
+                android:src="@android:drawable/ic_menu_gallery" />
+
         </LinearLayout>
 
         <LinearLayout