test_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:fitsSystemWindows="false"
    android:gravity="center">

    <TextView
        android:id="@+id/test_fragment_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="首页"
        android:textSize="30sp" />

</LinearLayout>