<span><span><?</span>xml version=<span>"1.0"</span> encoding=<span>"utf-8"</span><span>?></span></span>
<span><<span>androidx.constraintlayout.widget.ConstraintLayout</span> <span>xmlns:android</span>=<span>"http://schemas.android.com/apk/res/android"</span>
    <span>xmlns:tools</span>=<span>"http://schemas.android.com/tools"</span>
    <span>android:layout_width</span>=<span>"match_parent"</span>
    <span>android:layout_height</span>=<span>"match_parent"</span>
    <span>xmlns:app</span>=<span>"http://schemas.android.com/apk/res-auto"</span>
    <span>tools:context</span>=<span>".MainActivity"</span>></span>

    <span><<span>TextView</span>
        <span>android:text</span>=<span>"Title1"</span>
        <span>android:layout_width</span>=<span>"wrap_content"</span>
        <span>android:layout_height</span>=<span>"wrap_content"</span>
        <span>android:id</span>=<span>"@+id/textView"</span>
        <span>android:layout_marginTop</span>=<span>"16dp"</span>
        <span>app:layout_constraintLeft_toLeftOf</span>=<span>"parent"</span>
        <span>app:layout_constraintTop_toTopOf</span>=<span>"parent"</span> /></span>
    <span><<span>GridView</span>
        <span>android:id</span>=<span>"@+id/idGVcourses"</span>
        <span>android:layout_width</span>=<span>"match_parent"</span>
        <span>android:layout_height</span>=<span>"wrap_content"</span>
        <span>android:horizontalSpacing</span>=<span>"6dp"</span>
        <span>android:numColumns</span>=<span>"2"</span>
        <span>android:verticalSpacing</span>=<span>"6dp"</span>
        <span>app:layout_constraintTop_toBottomOf</span>=<span>"@id/textView"</span>
        <span>app:layout_constraintLeft_toLeftOf</span>=<span>"parent"</span>/></span>

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

Các đoạn code còn lại em tham khảo tại đây nhé: https://www.geeksforgeeks.org/gridview-in-android-with-example/