Arrow not in center

[oliverKucharovic]

how can i set the arrow to the center horizontal

<LinearLayout

  android:id="@+id/llPhone"
  android:orientation="horizontal"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_marginLeft="@dimen/margin_huge"
  android:layout_marginRight="@dimen/margin_huge"
  app:layout_constraintTop_toBottomOf="@id/tv_set_your_number"
  >
  <fr.ganfra.materialspinner.MaterialSpinner
    android:id="@+id/spPhone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"

    android:layout_gravity="center_vertical"
    android:gravity="center_vertical"

    app:ms_enableErrorLabel="false"
    app:ms_multiline="false"
    app:ms_enableFloatingLabel="false"
    app:ms_thickness="0px"
    app:ms_errorColor="@color/red"
    app:ms_hintColor="@color/red"
    app:ms_arrowColor="@color/text_color_primary"
    app:ms_arrowSize="@dimen/margin_medium"
    app:ms_alignLabels="false"
    android:visibility="visible"
    >
  </fr.ganfra.materialspinner.MaterialSpinner>
  <include
    android:layout_width="1dp"
    android:layout_height="match_parent"
    android:layout_margin="@dimen/margin_large"
    layout="@layout/divider"
    />

  <android.support.design.widget.TextInputLayout
    android:id="@+id/tiPhone"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

    <EditText
      style="@style/Text.TextInput"
      android:id="@+id/etPhone"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:paddingBottom="@dimen/margin_larger"
      android:inputType="phone"
      android:background="@null"
      />
  </android.support.design.widget.TextInputLayout>
</LinearLayout>

[oliverKucharovic]

spinner item
<TextView

style="@style/Text.SpItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/red_dark"
/>

[Chivorns]

Hi you can try to check this library: https://github.com/Chivorns/SmartMaterialSpinner.
Hope it can help what you need