ChipGroup single selection

android material-components material-components-android android-chips
adriennoir picture adriennoir · Nov 5, 2018 · Viewed 14.1k times · Source

How can I force a ChipGroup to act like a RadioGroup as in having at least one selected item always? Setting setSingleSelection(true) also adds the possibility to have nothing selected if you click twice on a Chip.

Answer

Gabriele Mariotti picture Gabriele Mariotti · Nov 20, 2019

To prevent all chips from being deselected you can use the method setSelectionRequired:

chipGroup.setSelectionRequired(true)

You can also define it in the layout using the app:selectionRequired attribute:

<com.google.android.material.chip.ChipGroup
    app:singleSelection="true"
    app:selectionRequired="true"
    app:checkedChip="@id/..."
    ..>

Note: This requires a minimum of version 1.2.0-alpha02

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