Intanto ti rispondo al volo, poi controllo.
Se funziona come in B4A, devi "recuperare" la (o le) label che compongono la listview ed impostare la sua Gravity a
Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL
Dim MyListView As ListView
MyListView.SingleLineLayout.Label.Gravity = Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL
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MyListView.TwoLinesLayout.Label.Gravity = Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL
MyListView.TwoLinesLayout.SecondLabel.Gravity = Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL
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MyListView.TwoLinesAndBitmap.Label.Gravity = Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL
MyListView.TwoLinesAndBitmap.SecondLabel.Gravity = Gravity.CENTER_HORIZONTAL + Gravity.CENTER_VERTICAL