All you need to do is to add custom drawable for your Seekbar. You need Seekbar background image and thumb image which you can store into Drawable folder.
Create custom xml as below
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/SecondaryProgress"
android:drawable="@drawable/progress_two"/>
</layer-list>
Use above custom xml file into Seekbar
<SeekBar
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:thumb="@drawable/drag_thumb"
android:progressDrawable="@layout/custom_seekbar_layout"
android:max="100" />