update design

app/src/main/res/drawable/durationback.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-    <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
-        <solid android:color="#000000" />
-        <stroke android:width="1dip" android:color="#888"/>
-    </shape>