Android OKHTTP的单例和再封装的实例

/** * Created by zm on 16-2-1 * okhttp的再封装,对于2.x版本，3.x版本将原有对okhttpclient配置 * 改成了builder模式配 * 置,对于超时、代理、dns，okhttp已经做好了配置， * 若不需要特殊配置，可以跳过 */public class OkHttpUtil{  private static OkHttpClient singleton;  //非常有必要，要不此类还是可以被new，但是无法避免反射，好恶心  private OkHttpUtil(){  }  public static OkHttpClient getInstance() {    if (singleton == null)    {      synchronized (OkHttpUtil.class)      {        if (singleton == null)        {          singleton = new OkHttpClient();        }      }    }    return singleton;  }}

/** * okhttp再次封装 * Created by zm on 16-2-1 * update by zm on 16-3-19 增加Builder，方便以后内容或者字段的扩展 *  */public class HttpTools{  private Context context;  private final RequestParams req;  private final Handler handler;  public HttpTools(Builder builder)  {    // TODO Auto-generated constructor stub    context = builder.context;    req = builder.req;    handler = builder.handler;  }  public static class Builder  {    private final RequestParams req;    private final Context context;    private final Handler handler;    public Builder(RequestParams req, Context mContext, Handler handler)    {      // TODO Auto-generated constructor stub      this.req = req;      this.context = mContext;      this.handler = handler;    }    public HttpTools build() {      return new HttpTools(this);    }  }  public void requestBuilder() {    // TODO Auto-generated method stub    if(req==null||context==null||handler==null){      throw new NullPointerException("NullPointerException");    }    requestGet(req, context, handler);  }  private static void parse(Call call, final Handler handler,      final RequestParams req) {    // 请求加入调度    call.enqueue(new Callback()    {      @Override      public void onResponse(Call call, Response response)          throws IOException {        // TODO Auto-generated method stub        String result = response.body().string();        if (result != null)        {          Message message = Message.obtain();          message.obj = result;          message.what = req.getSuccessMsgWhat();          handler.sendMessage(message);        }      }      @Override      public void onFailure(Call call, IOException e) {        // TODO Auto-generated method stub        handler.sendEmptyMessage(req.getFailMsgWhat());      }    });  }  /**   *    * @param req   * @param context   * @param handler   *    *      get请求   */  public static void requestGet(final RequestParams req,      final Context context, final Handler handler) {    // 创建一个Request    final Request request = new Request.Builder().url(req.getRequestUrl()).build();    Call call = OkHttpUtil.getInstance().newCall(request);    parse(call, handler, req);  }  /**   * post请求   */  public static void requestPost(final RequestParams req,      final Context context, final Handler handler) {    FormBody.Builder builder = new FormBody.Builder();    //此处是对RequestParams的遍历，RequestParams类省略    for (Map.Entry<String, Object> mEntry : req.getParamEntry())    {      String mEntryKey = mEntry.getKey();      Object mEntryValue = mEntry.getValue();      if (TextUtils.isEmpty(mEntryKey))      {        continue;      }      builder.add(mEntryKey, mEntryValue.toString());    }    RequestBody body = builder.build();    Request request = new Request.Builder().url(req.getUrl()).post(body).build();    Call call = OkHttpUtil.getInstance().newCall(request);    parse(call, handler, req);  }  /**   *      数据请求的集中管理，方便以后一键替换，从get到post   */  public static void request(RequestParams req, Context mContext,      Handler handler) {    // TODO Auto-generated method stub    requestGet(req, mContext, handler);  }}

/** *  * Created by zm on 16-2-1 * 基于Gson的json转model封装类 * */public class JsonToModel{private static String info = "info";  public static String getInfo()  {    return info;  }  public static void setInfo(String info)  {    JsonToModel.info = info;  }  /**   *    * @param msg   * @param t   *      model类   * @param model   *      model对象   * @return   */  public static <T> List<T> getJsonArrayToModel(Message msg, Class<T> t,      T model) {    // TODO Auto-generated method stub    List<T> list = new ArrayList<T>();    try {      JSONObject json = new JSONObject(msg.obj.toString());      for (int i = 0; i < json.getJSONArray(getInfo()).length(); i++) {        model = GsonHelper.toType(json.getJSONArray(getInfo()).get(i).toString(), t);        list.add(model);      }      return list;    } catch (Exception e) {      // TODO Auto-generated catch block      Log.e("getJsonArrayToModel", "error");      e.printStackTrace();    }    return null;  }}