android - Seekbar progress drawable show wrong issue when its progess value is zero -

i new in android platform. trying develop custom seek bar using .9 path image , xml.i created problem occurs when seekbar appear first time when activity start show wrong progress level when progess level define 0 in xml. check out image

here xml file code

        <seekbar             android:id="@+id/slider1"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:progress="0"             android:splittrack="false"             android:layout_margintop="5px"             android:layout_marginbottom="5px"             android:background="@android:color/transparent"             android:progressdrawable="@drawable/green_seekbar"             android:thumb="@drawable/slidercontralbt2" /> 

green_seekbar.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@android:id/background">     <nine-patch         xmlns:android="http://schemas.android.com/apk/res/android"         android:src="@drawable/sb"         android:dither="true"      /> </item>  <item     android:id="@android:id/progress"     android:drawable="@drawable/green_seekbar_progress" /> 

green_seekbar_progress.xml

<?xml version="1.0" encoding="utf-8"?> 

<item >   <clip>     <nine-patch         xmlns:android="http://schemas.android.com/apk/res/android"         android:src="@drawable/green"         android:dither="true"      />     </clip>     </item> 

finally reach solution. put below code in oncreate method.

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     .....     .....     slider1.setprogress(0);     slider1.invalidate();  }