Answers for "slivers flutter Vertical viewport was given unbounded height."

vertical viewport was given unbounded height listview flutter

Use shrinkWrap: true in ListView.

Column(
  children: <Widget>[
    ListView(
      shrinkWrap: true, // use this
    ),
  ],
)
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2 . Wrap ListView in Expanded

Column(
  children: <Widget>[
    Expanded( // wrap in Expanded
      child: ListView(...),
    ),
  ],
  )