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Required Single Selection On MaterialButtonToggleGroup
Is there an option to make the MaterialButtonToggleGroup
have a required selected button when using app:singleSelection="true"
?
When clicking to a different button works fine (all other buttons are deselected), but when you click the same (already selected) button it deselects it itself and I want to remain selected.
My example:
<com.google.android.material.button.MaterialButtonToggleGroup
android:layout_width="wrap"
android:layout_height="wrap_content"
app:singleSelection="true">
<com.google.android.material.button.MaterialButton
android:id="@+id/filterA"
style="@style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A"/>
<com.google.android.material.button.MaterialButton
android:id="@+id/filterB"
style="@style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="B"/>
<com.google.android.material.button.MaterialButton
android:id="@+id/filterC"
style="@style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C"/>
</com.google.android.material.button.MaterialButtonToggleGroup>
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Answer
You can define it in the layout using the app:selectionRequired
attribute:
<com.google.android.material.button.MaterialButtonToggleGroup
app:selectionRequired="true"
app:checkedButton="@id/..."
app:singleSelection="true">
You can also use the method setSelectionRequired
:
buttonGroup.setSelectionRequired(true);
Note: This requires a minimum of version 1.2.0-alpha03
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source: stackoverflow.com
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