Moshi无法将0，1反序列化为"Boolean?“

import com.squareup.moshi.FromJson;
import com.squareup.moshi.JsonDataException;
import com.squareup.moshi.ToJson;

public class NullableBooleanAdapter {
    @FromJson
    Boolean fromJson(int value) {
        if (value == 0) {
            return false;
        } else if (value == 1) {
            return true;
        } else {
            throw new JsonDataException("Invalid boolean value: " + value);
        }
    }

    @ToJson
    int toJson(Boolean value) {
        return value ? 1 : 0;
    }
}

Moshi moshi = new Moshi.Builder()
        .add(new NullableBooleanAdapter())
        .build();