<?xml version="1.0" encoding="utf-8"?>
  <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
  
      <item
          android:id="@android:id/background"
          android:drawable="@drawable/progress_bar_background">
      </item>
      <item android:id="@android:id/secondaryProgress">
          <scale
              android:drawable="@drawable/confirm"
              android:scaleGravity="center_vertical"
              android:scaleHeight="percentage"
              android:scaleWidth="percentage" />
      </item>
      <item android:id="@android:id/progress">
          <scale
              android:drawable="@drawable/edite_hint"
              android:scaleWidth="100%" />
      </item>
  
  </layer-list>