HTTP POST请求作为另一个Java类-Android Studio

Question

我是Android Studio，Java和Stack Overflow的完整入门者。我的应用程序使用Volley执行了许多HTTP Post请求，因此，我用代码执行了独立的Java类来执行Post请求。

public class HTTPReq
{
    public String postRequest(final HashMap<String,String> params, final Context context)
    {
        RequestQueue requestQueue=Volley.newRequestQueue(context);
        String url="<my_url>";
        StringRequest stringRequest=new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {

            @Override
            public void onResponse(String response)
            {
                Toast.makeText(context, response, Toast.LENGTH_LONG).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "Response Failed", Toast.LENGTH_LONG).show();
            }
        }){
            @Override
            protected Map<String,String> getParams(){
                return params;
            }

            @Override
            public Map<String,String> getHeaders() throws AuthFailureError{
                Map<String,String> params=new HashMap<String, String>();
                params.put("Content-Type","application/x-www-form-urlencoded");
                return params;
            }
        };
        requestQueue.add(stringRequest);
    }
}

我试图实现的是使用return返回http请求对函数调用的响应。函数调用如下：

public void login(String phno, String password,Context context)
{
    HashMap<String,String> credentials = new HashMap<String, String>();
    credentials.put("pass","pwd");
    credentials.put("phno","132");
    HTTPReq httpReq = new HTTPReq();
    String response = httpReq.postRequest(credentials,context);
    Toast.makeText(context, response, Toast.LENGTH_LONG).show();
}

我希望很清楚我要实现的目标。请帮助我。

Answer 1

测试

      public class HTTPReq {
        public void postRequest(final String pass, final String phno, final Context context) {
            RequestQueue requestQueue = Volley.newRequestQueue(context);
            String url = "<my_url>";
            StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {

            @Override
            public void onResponse(String response) {
                Toast.makeText(context, response, Toast.LENGTH_LONG).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "Response Failed", Toast.LENGTH_LONG).show();
            }
        }) {
            @Override
            protected Map<String, String> getParams() {
                HashMap<String,String> params = new HashMap<>();
                params.put("user", pass);
                params.put("phno", phno);
                return params;
            }

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> params = new HashMap<String, String>();
                params.put("Content-Type", "application/x-www-form-urlencoded");
                return params;
            }
        };
        requestQueue.add(stringRequest);
    }
}