Android 无法解析 Volley Method.GET

Question

我是 Android 新手，只是尝试按照 Android 网站上的说明使用 Volley，但没有找到正确的方法。

这行似乎引起了麻烦：

StringRequest stringRequest = new StringRequest(VoiceInteractor.Request.Method.GET, url,

错误是：

Error:(32, 92) error: cannot find symbol variable Method

MainActivity.java：

package com.jorc.volley;

import android.app.VoiceInteractor;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

          final TextView mTextView = (TextView) findViewById(R.id.text);
            // Instantiate the RequestQueue.
                    RequestQueue queue = Volley.newRequestQueue(this);
                    String url ="http://www.google.com";

            // Request a string response from the provided URL.
                    StringRequest stringRequest = new StringRequest(VoiceInteractor.Request.Method.GET, url,
                            new Response.Listener<String>() {
                                @Override
                                public void onResponse(String response) {
                                    // Display the first 500 characters of the response string.
                                    mTextView.setText("Response is: "+ response.substring(0,500));
                                }
                            }, new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            mTextView.setText("That didn't work!");
                        }
                    });
            // Add the request to the RequestQueue.
                    queue.add(stringRequest);
    }
}

Answer 1

使用 Volley 库中的 Request.Method.GET 到 StringRequest，而不是用于 voice interaction requests 的 VoiceInteractor.Request：

StringRequest stringRequest = new StringRequest(Request.Method.GET,... url,

Answer 2

这是 android 的官方文档所说的关于 volley requests Sending a Simple Request

简单的排球请求

 final TextView mTextView = (TextView) findViewById(R.id.text);
    ...

    // Instantiate the RequestQueue.
    RequestQueue queue = Volley.newRequestQueue(this);
    String url ="http://www.google.com";

    // Request a string response from the provided URL.
    StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
                new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            // Display the first 500 characters of the response string.
            mTextView.setText("Response is: "+ response.substring(0,500));
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            mTextView.setText("That didn't work!");
        }
    });
    // Add the request to the RequestQueue.
    queue.add(stringRequest);

如果您要发送 JSON 请求，那么您可以这样做，这是我自己使用 Volley 库发送 JSON 请求的方式

使用 Volley 的 JSON 请求

public void myJSONRequest(){
  JSONObjectRequest request = new JSONObjectRequest(
   Request.Method.GET,
   url, 
   null,
   new Response.Listener<JSONObject>(){
     public void onResponse(JSONResponse response){
      // Do you parsing 
     }
   },
   new Response.ErrorListener(){
     public void onErrorResponse(VolleyError volleyError){
      // handle your errors
     }
   }
  );
  if(request != null){
    requestQueue.add(request);
  }
  else{
     Log.d("ERROR", " Volley Request Failed");
  }
}