如何保存OkHttp客户端对象？

public class OkHttpClientSingleton {
    private static OkHttpClient instance;

    private OkHttpClientSingleton() {
        // 私有构造函数，防止外部实例化
    }

    public static OkHttpClient getInstance() {
        if (instance == null) {
            instance = new OkHttpClient();
        }
        return instance;
    }
}

@Module
public class NetworkModule {
    @Provides
    OkHttpClient provideOkHttpClient() {
        return new OkHttpClient();
    }
}

public class MyApplication extends Application {
    private OkHttpClient okHttpClient;

    @Override
    public void onCreate() {
        super.onCreate();
        okHttpClient = DaggerAppComponent.builder()
                .networkModule(new NetworkModule())
                .build()
                .getOkHttpClient();
    }

    public OkHttpClient getOkHttpClient() {
        return okHttpClient;
    }
}

public class MyNetworkService {
    private OkHttpClient okHttpClient;

    public MyNetworkService(OkHttpClient okHttpClient) {
        this.okHttpClient = okHttpClient;
    }

    // 使用OkHttpClient进行网络请求
}