Volley介绍JSon 和提交字符串参数的封装（StringRequest和Gson）

た入场券 2022-07-16 12:46 119阅读 0赞

接口回调：

public interface StringVolleyCallback {
        //StringFromNet()和StringFromAndPutNet()方法调用
        public void getStringFromVolley(String s);
        //StringFromAndPutNet()方法调用
        public void putStringFromVolley(Map<String, String> map);
        //对json的字符串进行解析
        public void getJsonFromJsonString(Object o);
        //输出异常信息
        public void getJsonErrorResponse(String s);
    }

方法类：

/**
     * 
     * 从网络获取字符串数据
     */
    
    public class DataOfString {
        private Context context;
        private String url;
        private RequestQueue mQueue;
        private Class<?>  mClass;
        private int method;
        private Gson gson;
        //接口回调步骤2：定义接口成员变量
        private StringVolleyCallback stringVolleyCallback;
        //接口回调步骤3：实例化接口
        public void setVolleyCallBck(StringVolleyCallback stringVolleyCallback) {
            this.stringVolleyCallback = stringVolleyCallback;
        }
    
        public DataOfString(Context context, String url,int method,Class<?>  mClass){
            this.context = context;
            this.url = url;
            this.method = method;
            this.mClass = mClass;
            mQueue = Volley.newRequestQueue(context);
    
            GsonBuilder builder = new GsonBuilder();
            builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
                public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                    return new Date(json.getAsJsonPrimitive().getAsLong());
                }
            });
           gson = builder.create();
        }
    
        public DataOfString(View view,String url,int method,Class<?>  mClass){
            this(view.getContext(),url,method,mClass);
        }
    
        public void StringFromNet() {
            StringRequest stringRequest = new StringRequest(method,url, new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                    //接口回调步骤4：实现接口回调方法
                    if (stringVolleyCallback !=null){
                        stringVolleyCallback.getStringFromVolley(s);
                        stringVolleyCallback.getJsonFromJsonString(gson.fromJson(s,mClass));
                    }
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError volleyError) {
                    //打印错误信息
                    Log.e("请求错误信息：", volleyError.getMessage(), volleyError);
                    if (stringVolleyCallback !=null){
                       stringVolleyCallback.getJsonErrorResponse(volleyError.getMessage());
                    }
                }
            }){
                @Override
                protected Response<String> parseNetworkResponse(NetworkResponse response) {
                    //获取session
                    new ConnectViaSession().getSession(response);
                    return super.parseNetworkResponse(response);
                }
            };
    
            mQueue.add(stringRequest);
        }
    
        public void StringFromAndPutNet() {
            StringRequest stringRequest = new StringRequest(method, url, new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                    if (stringVolleyCallback !=null){
                        stringVolleyCallback.getStringFromVolley(s);
                        stringVolleyCallback.getJsonFromJsonString(gson.fromJson(s,mClass));
                    }
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError volleyError) {
                    //打印错误信息
                    Log.e("TAG", volleyError.getMessage(), volleyError);
                }
            }){
                //发送session
                 @Override
                 public Map<String, String> getHeaders() throws AuthFailureError {
                     //发送session
                     String sesseionid = new ConnectViaSession().GetSession();
                     if (!sesseionid.equals("")) {
                         HashMap<String, String> headers = new HashMap<String, String>();
                         headers.put("cookie", sesseionid);
                         return headers;
                     }else {
                         return super.getHeaders();
                  }
               }
    
                //给服务器提交参数
                @Override
                protected Map<String, String> getParams() throws AuthFailureError {
                    Map<String, String> map = new HashMap<String, String>();
                    if (stringVolleyCallback !=null){
                        stringVolleyCallback.putStringFromVolley(map);
                        return map;
                    }
                    return map;
                }
            };
            mQueue.add(stringRequest);
        }
    }

使用：

DataOfString json = new DataOfString(getApplicationContext(),url, Request.Method.POST,loginPojo.class);
            json.setVolleyCallBck(new StringVolleyCallback() {
                @Override
                public void getStringFromVolley(String s) {
                    //System.out.println(s);
                }
    
                @Override
                public void putStringFromVolley(Map<String, String> map) {
           
                }
    
                @Override
                public void getJsonFromJsonString(Object o) {
                     
                     }
                }
    
                @Override
                public void getJsonErrorResponse(String s) {
    
                }
            });
            json.StringFromAndPutNet();