set progress in data binding

[hossein-no1]

hi.
i don't set progress in xml with data binding??
please help me!

<com.mikhaellopez.circularprogressbar.CircularProgressBar android:id="@+id/pb_improvement_fragmentStateProfile" android:layout_width="wrap_content" android:layout_height="0dp" android:scrollbarFadeDuration="1000" app:cpb_background_progressbar_color="@color/shadowOrange" app:cpb_background_progressbar_width="5dp" app:cpb_progress="@{data.improvementPercent}" app:cpb_progress_direction="to_right" app:cpb_progressbar_color="@color/orange" app:cpb_progressbar_width="5dp" app:cpb_round_border="false" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.0" />

i try by any type of variable(int,float,...),but not working