Volley的简单的二次回调封装

对Volley的简单的二次回调封装

1、新建一个VolleyInterface类

public abstract class VolleyInterface {

    public Context mContext;
    public static Response.Listener mListener;
    public static Response.ErrorListener mErrorListener;

    public VolleyInterface(Context context, Response.Listener listener, Response.ErrorListener errorListener){
        this.mContext = context;
        this.mListener = listener;
        this.mErrorListener = errorListener;
    }

    public abstract void onMySuccess(String result);
    public abstract void onMyError(VolleyError error);

    public Response.Listener loadingListener(){
        mListener = new Response.Listener() {
            @Override
            public void onResponse(String s) {
                //弹出加载对话框
                onMySuccess(s);
            }
        };
        return mListener;
    }

    public Response.ErrorListener errorListener(){
        mErrorListener = new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                onMyError(volleyError);
                //提示请求失败
                String msg = "";
                if (volleyError instanceof TimeoutError){
                    msg = MyApplication.netWorkTimeOut;
                }
//                else if (volleyError != null && volleyError.getMessage() != null){
//                    try {
//                        msg = new JSONObject(volleyError.getMessage().optString("message"));
//                    } catch (JSONException e) {
//                        e.printStackTrace();
//                    }
//                }
                else {
                    msg = MyApplication.netWorkError;
                }
                Toast.makeText(mContext,msg,Toast.LENGTH_LONG).show();
                Log.e("error msg","url = error msg" + msg);
            }
        };
        return mErrorListener;
    }
}

2、建一个VolleyRequest 类

public class VolleyRequest {

    public static StringRequest stringRequest;
    public static Context mContext;

    public static void RequestGet(Context mContext,String url,String tag,VolleyInterface vif){
        //先把带tag标签的请求关闭掉，避免重复的请求来小号内存
        MyApplication.getHttpQueues().cancelAll(tag);
        stringRequest = new StringRequest(Request.Method.GET,url,vif.loadingListener(),vif.errorListener());
        stringRequest.setTag(tag);
        MyApplication.getHttpQueues().add(stringRequest);
        MyApplication.getHttpQueues().start();

    }

    public static void RequestPost(Context mContext, String url, String tag, final Map params, VolleyInterface vif){
        MyApplication.getHttpQueues().cancelAll(tag);
        stringRequest = new StringRequest(url,vif.loadingListener(),vif.errorListener()){
            @Override
            protected Map getParams() throws AuthFailureError {
                return params;
            }
        };
        stringRequest.setTag(tag);
        MyApplication.getHttpQueues().add(stringRequest);
        MyApplication.getHttpQueues().start();
    }
}

3、使用Volley简单封装后的get请求：

//使用封装后的Get请求
private void request_Get(){
    String url = "http://httpbin.org/get?site=code&network=tutsplus";
    VolleyRequest.RequestGet(this, url, "abcGet", new VolleyInterface(this,VolleyInterface.mListener,VolleyInterface.mErrorListener) {
        @Override
        public void onMySuccess(String result) {
            tv_content.setText("请求结果：\n" + result);
        }

        @Override
        public void onMyError(VolleyError error) {
            tv_content.setText("请求结果：\n" + error.toString());
        }
    });
}

4、附加一点Volley与Activity生命周期的联动

只需在Activity生命周期的onStop()方法里面把之前请求中所做的tag标记的请求关闭掉即可

@Override
protected void onStop() {
    super.onStop();
    MyApplication.getHttpQueues().cancelAll("abcGet");
}

单独的get与post请求请参考上一篇文章Volley的get和post请求方式的使用

http://blog.csdn.net/u013184970/article/details/70036566