如何将图像下的文本居中

现在,我在constraint layout中有3个图像按钮(不在tablelayout或gridlayout中),我希望在图像按钮下有文本,这些按钮相对于图像按钮居中。

这就是我现在所拥有的:

我希望布局使文本视图居中,而不是与图像按钮右/左对齐。

这是我的代码:

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/topNavigationView"
    >
    <androidx.constraintlayout.widget.ConstraintLayout

        android:id="@+id/flFragment"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/topNavigationView"
        app:layout_constraintVertical_bias="0.0">

        <ImageButton
            android:id="@+id/button"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_marginTop="16dp"
            android:background="@xml/round_shape"
            app:layout_constraintEnd_toStartOf="@+id/button2"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@drawable/ic_launcher_foreground" />

        <ImageButton
            android:id="@+id/button2"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_marginStart="10dp"
            android:layout_marginTop="16dp"
            android:background="@xml/round_shape"
            app:layout_constraintEnd_toStartOf="@+id/button13"
            app:layout_constraintStart_toEndOf="@+id/button"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@drawable/ic_launcher_foreground" />

        <ImageButton
            android:id="@+id/button13"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_marginStart="10dp"
            android:layout_marginTop="16dp"
            android:background="@xml/round_shape"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/button2"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@drawable/ic_launcher_foreground" />

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toStartOf="@+id/textView2"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/button" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toStartOf="@+id/textView4"
            app:layout_constraintStart_toEndOf="@+id/textView"
            app:layout_constraintTop_toBottomOf="@+id/button2" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/textView2"
            app:layout_constraintTop_toBottomOf="@+id/button13" />


    </androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>

非常感谢。