java - 使用来自 java 类和方法的数据

Question

我有一个入门级问题:

如果有外部java类，假设该类中有一个名为“method1”的方法，该方法内有一个名为“method1”的方法，该方法内有一个覆盖方法“onResponse”，两个变量被设置为“a”和“b” .

在 android mainActivity 中，我从类中调用了该方法，如下所示:

Class1.method1();

调用该方法后，我如何检索这些变量以在 mainActivity 中使用...

谢谢..

public abstract class Class1 extends Context {

final Context mcontext;


public static void method1(final Context mcontext, final String x){


    StringRequest stringRequest = new StringRequest(Request.Method.POST, constants.URL, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {

                        JSONObject parentObject = new JSONObject(response);
                        JSONObject userDetails = parentObject.getJSONObject("data");

                        //read attributes
                        String a = userDetails.getString("a");
                        String b = userDetails.getString("b");



                    } catch (JSONException e) {


                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(mcontext, error.getMessage() ,Toast.LENGTH_LONG).show();
                }
            }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String,String> params = new HashMap<>();
            params.put("x", x);
            return params;
        }
    };

    requestHandler.getInstance(mcontext).addToRequestQueue(stringRequest);
}

Answer 1

为什么不为 a 和 b 创建包装类

public class Details {
    public string a;
    public string b; 
}

然后在方法1中读取/返回它

public abstract class Class1 extends Context {

final Context mcontext;


public static Details method1(final Context mcontext, final String x){

    Details data = new Details;


    StringRequest stringRequest = new StringRequest(Request.Method.POST, constants.URL, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {

                        JSONObject parentObject = new JSONObject(response);
                        JSONObject userDetails = parentObject.getJSONObject("data");

                        //read attributes
                         data.a = userDetails.getString("a");
                         data.b = userDetails.getString("b");



                    } catch (JSONException e) {


                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(mcontext, error.getMessage() ,Toast.LENGTH_LONG).show();
                }
            }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String,String> params = new HashMap<>();
            params.put("x", x);
            return params;
        }
    };


    requestHandler.getInstance(mcontext).addToRequestQueue(stringRequest);

    return data; 
}