Android volley添加Cookie

Volley 默認是不支持Cookie的，如何添加Cookie，很是頭疼。

看源碼後發現HttpStack的子類中都有添加Header的代碼。

HurlStack performRequest方法中

HashMap map = new HashMap();
        map.putAll(request.getHeaders());
        map.putAll(additionalHeaders);
        if (mUrlRewriter != null) {
            String rewritten = mUrlRewriter.rewriteUrl(url);
            if (rewritten == null) {
                throw new IOException("URL blocked by rewriter: " + url);
            }
            url = rewritten;
        }
        URL parsedUrl = new URL(url);
        HttpURLConnection connection = openConnection(parsedUrl, request);
        for (String headerName : map.keySet()) {
            connection.addRequestProperty(headerName, map.get(headerName));
        }

HttpClientStack performRequest方法中

addHeaders(httpRequest, request.getHeaders());

看到什麼端倪了吧，對 request.getHeaders()可以設置Cookie

所以我們只要繼承Request，實現request中的getHeaders()方法就行了。

下面是我繼承JsonObjectRequest實現的方法

import java.util.HashMap;
import java.util.Map;
import org.json.JSONObject;
import com.android.volley.AuthFailureError;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.JsonObjectRequest;

public class CookieRequest extends JsonObjectRequest {
    private Map mHeaders=new HashMap(1);

    public CookieRequest(String url, JSONObject jsonRequest, Listener listener,
                                   ErrorListener errorListener) {
        super(url, jsonRequest, listener, errorListener);
    }

    public CookieRequest(int method, String url, JSONObject jsonRequest, Listener listener,
                                   ErrorListener errorListener) {
        super(method, url, jsonRequest, listener, errorListener);
    }
    
    public void setCookie(String cookie){
        mHeaders.put("Cookie", cookie);
    }

    @Override
    public Map getHeaders() throws AuthFailureError {
        return mHeaders;
    }

}