如何将标签设置为请求并从Response Volley异步请求中获取它？ [英] How to Set Tag to the request and get it from Response Volley asynchronous request?

问题描述

我有一个具有多个REST Api的Android应用程序。使用Volley库管理API。响应越来越好了。但是当我发出异步请求时，我无法识别每个请求的响应。

I have an Android application with multiple REST Api's. The API's are managed using the Volley library. The response is getting and it's woking fine. But when I make asynchronous requests, I can't identify the response of each request.

我的请求方法是：

private void httpCall(String URL, String json, String session key, int type) {
        try {
            SSLContext sslcontext = SSLContext.getInstance("TLSv1");
           sslcontext.init(null,
                    null,
                    null);
            SSLSocketFactory NoSSLv3Factory = new NoSSLv3SocketFactory(sslcontext.getSocketFactory());
            HttpsURLConnection.setDefaultSSLSocketFactory(NoSSLv3Factory);

            Log.i(REQUEST_TAG, "httpCall=url" + url + "::type" + type);
            Log.i(REQUEST_TAG, "httpCall=json" + json);
        } catch (Exception e) {
            e.printStackTrace();

        }
        if (mContext != null)
            mQueue = CustomVolleyRequestQueue.getInstance(mContext).getRequestQueue();
        else
            mQueue = CustomVolleyRequestQueue.getInstance(mActivity).getRequestQueue();
        JSONObject mJSONObject;
        final CustomJSONObjectRequest jsonRequest;
        try {
            if ((json != null) && (json.trim().length() > 0)) {
                mJSONObject = new JSONObject(json);
            } else {
                mJSONObject = new JSONObject();
            }
            jsonRequest = new CustomJSONObjectRequest(sessionkey, type, url, mJSONObject, this, this);
            // Wait 20 seconds and don't retry more than once
            jsonRequest.setRetryPolicy(new DefaultRetryPolicy(
                    (int) TimeUnit.SECONDS.toMillis(20),
                    DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                    DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

            jsonRequest.setTag(REQUEST_TAG);
            mQueue.add(jsonRequest);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

是否可以为请求设置标签并从响应中得到相同的结果？这样我就可以识别当前的请求和响应。我不知道这是一个重复的问题，但是我没有得到适当的解释。

Is there any option to set a tag to the request and get the same from the response?. So that I can identify the current request and response. I don't know this is a duplicate question, but I didn't get a proper explanation for this.

我的响应方法是：

@Override
    public void onResponse(Object response) {
        if (response != null) {

            // I want to trigger the request tag from here

            mCallBack.onSuccessData(response);
        }
    }

请求和响应方法在同一类中，并且已实现的类Response.Listener，Response.ErrorListener。

The request and response method are in same class and the class implemented Response.Listener, Response.ErrorListener.

推荐答案

您分配给请求的标签存储在变量中mTag （在请求的整个生命周期中保持不变）。

The tag you assign to a Request is stored to the variable mTag which is persisted throughout the life cycle of the Request.

public Request<?> setTag(Object tag) {
    mTag = tag;
    return this;
}

对于我的应用程序，我对以下Volley类进行了一些修改：

For my applications I have slightly modified the following Volley classes:

在类请求中，将mTag的可见性从私有更改为受保护

In class Request change visibility of mTag from private to protected

/** An opaque token tagging this request; used for bulk cancellation. */
    protected Object mTag;

在类响应中，添加对象标签接口 Listener

/** Callback interface for delivering parsed responses. */
public interface Listener<T> {
    /** Called when a response is received. */
    public void onResponse(Object tag, T response);
}

在实现接口 Response.Listener 的类中，像 JsonRequest

In classes which implement interface Response.Listener, like JsonRequest

@Override
protected void deliverResponse(T response) {
    mListener.onResponse(mTag, response);
}

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