Android/ XML :当RecyclerView为空时，在XML的中心创建TextView

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <TextView
        android:id="@+id/emptyTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RecyclerView is empty"
        android:layout_centerInParent="true"
        android:visibility="gone" />

</RelativeLayout>

RecyclerView recyclerView = findViewById(R.id.recyclerView);
TextView emptyTextView = findViewById(R.id.emptyTextView);

// 假设dataList是RecyclerView的数据源
if (dataList.isEmpty()) {
    recyclerView.setVisibility(View.GONE);
    emptyTextView.setVisibility(View.VISIBLE);
} else {
    recyclerView.setVisibility(View.VISIBLE);
    emptyTextView.setVisibility(View.GONE);
}