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To configure DataStore to save a boolean variable, you can use the following code:

private DataStore<Boolean> dataStore = context.dataStoreFactory.create(
  new JsonSerializer<Boolean>(),
  new PreferencesDataStoreFactory().create(context, "my_data_store")
);

// To save the boolean value
dataStore.updateDataAsync(data -> {
  data.set(KEY_BOOLEAN_VALUE, newValue);
  return data;
});

// To retrieve the boolean value
dataStore.data().map(data -> data.get(KEY_BOOLEAN_VALUE, false)).asLiveData();

In this example, we are using PreferencesDataStoreFactory to create a DataStore instance that utilizes SharedPreferences to store the data. We are creating a DataStore instance for a boolean value using a JsonSerializer for serialization and deserialization.

We then update the boolean value using the updateDataAsync method, which takes a lambda that updates the DataStoreData object. In this case, we're updating the boolean value with the new value.

To retrieve the boolean value, we are using the data method to get a LiveData object representing the current value of the DataStore. We then map the DataStoreData object to the boolean value using the get method, which takes a default value in case the key is not found in the DataStore.