Android APP架构的那点事儿[网络模块]

来源：互联网发布：爵迹抄袭知乎编辑：程序博客网时间：2024/05/17 04:34

接上篇《Android APP架构的那点事儿》

So,我们首先来规划一下网络模块的代码基本结构

网络模块代码结构

网络模块的基本职责就是构建请求参数、请求服务器、响应服务器、加解密。UML图中，我们定义的了一个接口类,主要提供客户端访问服务器的预设的一些接口函数。

当MVP架构的Presenter指示器调用网络请求入口类(NetworkController)函数时，NetworkController 只需调用
NetworkInterface 中对应的接口函数,无需关心网络请求的具体类或细节。这样一定程度上做到了代码分离、解耦合，同时方便更换具体其他的网络请求具体实现类。如把VolleyHttpClient换成OKHttpClient即可。

/** * 网络访问控制器 *  * @param <T> */public class NetworkController implements NetworkInterface {    private static NetworkController mVolleyContrller;    private NetworkInterface mNetworkInterface;    private NetworkController(Context context) {        // 多态方便以后更换网络框架        mNetworkInterface = new VolleyHttpClient(context);    }    public static synchronized NetworkController getInstance(Context context) {        if (null == mVolleyContrller) {            // 单例,持有应用级别上下文，可以防止持有activity的上下文导致内存泄露            mVolleyContrller = new NetworkController(                    context.getApplicationContext());        }        return mVolleyContrller;    }    @Override    public void requestCityList(Map<String, String> params, NetworkRequestListener callBack) {        mNetworkInterface.requestCityList(params, callBack);    }    @Override    public void requestCityWeatherDetailByIP(Map<String, String> params, NetworkRequestListener callBack) {        mNetworkInterface.requestCityWeatherDetailByIP(params, callBack);    }    @Override    public void requestCityWeatherDetailByCityID(Map<String, String> params, NetworkRequestListener callBack) {        mNetworkInterface.requestCityWeatherDetailByCityID(params,callBack);    }}

/** * 网络访问接口 * */public interface NetworkInterface {    /**     * 请求城市列表     *      * @param params     *            Map<String, String>     *      * @param callBack     *            {@link NetworkRequestListener}     */    public void requestCityList(Map<String, String> params, NetworkRequestListener callBack);    /**     * 通过IP请求天气详情     *     * @param params     *            Map<String, String>     *     * @param callBack     *            {@link NetworkRequestListener}     */    public void requestCityWeatherDetailByIP(Map<String, String> params, NetworkRequestListener callBack);    /**     * 通过城市ID请求天气详情     *     * @param params     *            Map<String, String>     *     * @param callBack     *            {@link NetworkRequestListener}     */    public void requestCityWeatherDetailByCityID(Map<String, String> params, NetworkRequestListener callBack);}

    /** * Google 的Volley网络访问框架 * */public class VolleyHttpClient implements NetworkInterface {    /** 请求队列 */    private RequestQueue queue;    private Context mContext;    public VolleyHttpClient(Context context) {        queue = Volley.newRequestQueue(context);        this.mContext = context;    }    /**     * put the request into RequestQueue     *      * @param     */    private void addQueue(final String url, final NetworkRequestListener callBack) {        StringRequest request = new StringRequest(Request.Method.POST, url,                new Listener<String>() {                    @Override                    public void onResponse(String arg0) {                        try {                            //TODO:这里可以统一设置解密//                          JSONObject obj = new JSONObject(arg0);//                          String data = obj.optString("msg");//                          data = NetworkUtility.decodResponseData(mContext, data);                            if (null != callBack) {                                callBack.response(arg0);                            }                        } catch (Exception e) {                            if (null != callBack) {                                callBack.error(0, e.getMessage());                            }                        }                    }                }, new Response.ErrorListener() {                    @Override                    public void onErrorResponse(VolleyError arg0) {                        if (null != callBack) {                            callBack.error(0, parserNetError(url, arg0));                        }                    }                });        queue.add(request);    }    private String parserNetError(String url, VolleyError volleyerror) {        if (volleyerror instanceof ParseError) {            ParseError error = (ParseError) volleyerror;            if (!TextUtils.isEmpty(error.getMessage())) {                return error.getMessage();            } else {                return "获取数据失败";            }        } else if (volleyerror instanceof ServerError) {            return "服务器错误";        } else if (volleyerror instanceof NetworkError) {            return "网络不给力";        } else if (volleyerror instanceof TimeoutError) {            return "连接超时";        } else {            return "连接异常";        }    }    @Override    public void requestCityList(Map<String, String> params, NetworkRequestListener callBack) {        String url=API.getWeatherList+"?"+NetworkUtility.getUrlParams(mContext, params);        addQueue(url, callBack);    }    @Override    public void requestCityWeatherDetailByIP(Map<String, String> params, NetworkRequestListener callBack) {        String url=API.getWeatherDetailByIp+"?"+NetworkUtility.getUrlParams(mContext, params);        addQueue(url, callBack);    }    @Override    public void requestCityWeatherDetailByCityID(Map<String, String> params, NetworkRequestListener callBack) {        String url=API.getWeatherDetailByCityIndex+"?"+NetworkUtility.getUrlParams(mContext, params);        addQueue(url, callBack);    }}

图片请求模块结构基本类似于网络部分,有兴趣的看官可以到GitHub上下载代码查阅。

网络模块的代码结构图

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