排球补丁中的错误

Question

com.android.volley.NoConnectionError：java.net.ProtocolException：未知方法“
PATCH”；必须是[OPTIONS，GET，HEAD，POST，PUT，DELETE，TRACE]中的一种

StringRequest putRequest = new StringRequest(Request.Method.PATCH, url,
                 new Response.Listener<String>()
                 {
                     @Override
                     public void onResponse(String response) 
                     {

                         Log.d("Response", response);

                     }
                 },
                 new Response.ErrorListener()
                 {
                      @Override
                      public void onErrorResponse(VolleyError error) 
                      {


                          Log.d("Error.Response", error.toString());

                    }
                 }
             ) {

                 @Override
                 protected Map<String, String> getParams()
                 { 
                         Map<String, String>  params = new HashMap<String, String> (); 
                         params.put("name", "My Name"); 
                         params.put("age", "11");

                         return params; 
                 }

             };

Answer 1

您确定使用的Volley
Library版本正确吗？我刚刚在Lollipop中尝试了您的代码，它工作正常。如果您将Volley库用作外部项目，请检查com.android.volley包中Request类的Method接口。它应该有一个PATCH变量。

public interface Method {
        int DEPRECATED_GET_OR_POST = -1;
        int GET = 0;
        int POST = 1;
        int PUT = 2;
        int DELETE = 3;
        int HEAD = 4;
        int OPTIONS = 5;
        int TRACE = 6;
        int PATCH = 7;
    }

如果不是，请使用最新版本的Volley库。

更新：

您是正确的，它在Kitkat中显示此错误，但在Lollipop中未显示。我猜主要的问题是Java的HTTPUrlConnection不支持PATCH。（我猜它在Lollipop中起作用，因为它使用的是Java
7，而Java 7的HTTPUrlConnection支持PATCH方法？）不管怎样，您可以使用OkHttp库来纠正此问题。okhttp-
urlconnection模块实现java.net.HttpURLConnection

将以下jar添加到您的libs文件夹中：
okhttp-2.2.0.jar

okhttp-urlconnection-2.2.0.jar

okio-1.2.0.jar

创建一个OkHttpStack类：

package com.example.temp;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

import com.android.volley.toolbox.HurlStack;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.OkUrlFactory;

public class OkHttpStack extends HurlStack {
    private final OkUrlFactory mFactory;

    public OkHttpStack() {
        this(new OkHttpClient());
    }

    public OkHttpStack(OkHttpClient client) {
        if (client == null) {
            throw new NullPointerException("Client must not be null.");
        }
        mFactory = new OkUrlFactory(client);
    }

    @Override protected HttpURLConnection createConnection(URL url) throws IOException {
        return mFactory.open(url);
    }
}

使用以下构造函数创建Volley RequestQueue：

Volley.newRequestQueue(getApplicationContext(),new OkHttpStack()).add(putRequest);

现在它正在Kitkat上为我工作。