Question

我想处理并在onErrorResponse

中显示一些消息

下面是我的代码。

String url = MainActivity.strHostUrl+"api/delete_picture"; 
jobjDeleteImage = new JsonObjectRequest(Request.Method.POST, url, jobj, new Response.Listener<JSONObject>() {

    @Override
    public void onResponse(JSONObject response) {
        Log.e("Image response", response.toString());


    }
},  new Response.ErrorListener() {

    @Override
    public void onErrorResponse(VolleyError error) {

        Log.e("Volly Error", error.toString());

        NetworkResponse networkResponse = error.networkResponse;
        if (networkResponse != null) {
            Log.e("Status code", String.valueOf(networkResponse.statusCode));
        }
    }
});

我想在这里处理com.android.volley.TimeoutError以及其他一些错误代码，例如404,503等和Toast消息。

Answer 1

networkResponse为null，因为在TimeoutError中没有从服务器收到数据 - 因此超时。相反，当发生其中一个事件时，您需要显示通用客户端字符串。您可以使用instanceof检查VolleyError的类型，以区分错误类型，因为您没有可以使用的网络响应 - 例如：

@Override
public void onErrorResponse(VolleyError error) {

    if (error instanceof TimeoutError || error instanceof NoConnectionError) {
        Toast.makeText(context,
                context.getString(R.string.error_network_timeout),
                Toast.LENGTH_LONG).show();
    } else if (error instanceof AuthFailureError) {
        //TODO
    } else if (error instanceof ServerError) {
       //TODO
    } else if (error instanceof NetworkError) {
      //TODO
    } else if (error instanceof ParseError) {
       //TODO
    }
}

Answer 2

你也有TimeoutError和NoConnectionError。超级实用。

Answer 3

这就是我在项目中使用的东西。

        @Override
        public void onErrorResponse(VolleyError error) {
            if(error instanceof NoConnectionError){
                ConnectivityManager cm = (ConnectivityManager)mContext
                        .getSystemService(Context.CONNECTIVITY_SERVICE);
                NetworkInfo activeNetwork = null;
                if (cm != null) {
                    activeNetwork = cm.getActiveNetworkInfo();
                }
                if(activeNetwork != null && activeNetwork.isConnectedOrConnecting()){
                    Toast.makeText(getActivity(), "Server is not connected to internet.",
                            Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getActivity(), "Your device is not connected to internet.",
                            Toast.LENGTH_SHORT).show();
                }
            } else if (error instanceof NetworkError || error.getCause() instanceof ConnectException 
                    || (error.getCause().getMessage() != null 
                    && error.getCause().getMessage().contains("connection"))){
                Toast.makeText(getActivity(), "Your device is not connected to internet.", 
                        Toast.LENGTH_SHORT).show();
            } else if (error.getCause() instanceof MalformedURLException){
                Toast.makeText(getActivity(), "Bad Request.", Toast.LENGTH_SHORT).show();
            } else if (error instanceof ParseError || error.getCause() instanceof IllegalStateException
                    || error.getCause() instanceof JSONException
                    || error.getCause() instanceof XmlPullParserException){
                Toast.makeText(getActivity(), "Parse Error (because of invalid json or xml).", 
                        Toast.LENGTH_SHORT).show();
            } else if (error.getCause() instanceof OutOfMemoryError){
                Toast.makeText(getActivity(), "Out Of Memory Error.", Toast.LENGTH_SHORT).show();
            }else if (error instanceof AuthFailureError){
                Toast.makeText(getActivity(), "server couldn't find the authenticated request.", 
                        Toast.LENGTH_SHORT).show();
            } else if (error instanceof ServerError || error.getCause() instanceof ServerError) {
                Toast.makeText(getActivity(), "Server is not responding.", Toast.LENGTH_SHORT).show();
            }else if (error instanceof TimeoutError || error.getCause() instanceof SocketTimeoutException
                    || error.getCause() instanceof ConnectTimeoutException 
                    || error.getCause() instanceof SocketException
                    || (error.getCause().getMessage() != null 
                    && error.getCause().getMessage().contains("Connection timed out"))) {
                Toast.makeText(getActivity(), "Connection timeout error", 
                        Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getActivity(), "An unknown error occurred.", 
                        Toast.LENGTH_SHORT).show();
            }
        }

Answer 4

您可以使用自定义排球等级来处理凌空快速响应像这样：排球班：

＆＃13;

import android.content.Context;
import android.graphics.Bitmap;
import android.text.TextUtils;
import android.util.LruCache;

import com.android.volley.DefaultRetryPolicy;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.Volley;

import static android.content.ContentValues.TAG;

public class VolleyClass {
    private static VolleyClass mInstance;
    private RequestQueue mRequestQueue;
    private ImageLoader mImageLoader;
    private Context mCtx;
    private int time = 0;

    public VolleyClass(Context context) {
        mCtx = context;
        mRequestQueue = getRequestQueue();

        mImageLoader = new ImageLoader(mRequestQueue,
                new ImageLoader.ImageCache() {
                    private final LruCache<String, Bitmap>
                            cache = new LruCache<>(20);

                    @Override
                    public Bitmap getBitmap(String url) {
                        return cache.get(url);
                    }

                    @Override
                    public void putBitmap(String url, Bitmap bitmap) {
                        cache.put(url, bitmap);
                    }
                });
    }

    public static synchronized VolleyClass getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new VolleyClass(context);
        }
        return mInstance;

    }

    public <T> void addToRequestQueue(Request<T> req, String tag) {
        // set the default tag if tag is empty
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        req.setRetryPolicy(new DefaultRetryPolicy(
                time,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

        getRequestQueue().add(req);
    }

    private RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            // getApplicationContext() is key, it keeps you from leaking the
            // Activity or BroadcastReceiver if someone passes one in.
            //mRequestQueue = Volley.newRequestQueue(mCtx.getApplicationContext());
         mRequestQueue = Volley.newRequestQueue(mCtx.getApplicationContext(), new OkHttpStack(new com.squareup.okhttp.OkHttpClient()));
        }
        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req) {

        req.setRetryPolicy(new DefaultRetryPolicy(
                time,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        getRequestQueue().add(req);
    }




    /*public ImageLoader getImageLoader() {
        return mImageLoader;
    }*/
}

＆＃13;

Sinc gradle with 编译＆＃39; com.android.volley：volley：1.0.0＆＃39; 编译＆＃39; com.squareup.okhttp3：okhttp：3.8.1＆＃39;

初步排球： VolleyClass volleyClass; volleyClass = new VolleyClass（this）; //在onCreate下然后调用该方法进行操作 1.row data：

    private void serverCall() {
        final ProgressDialog mDialog = new ProgressDialog(SettingActivity.this);
        mDialog.setMessage("Please wait...");
        mDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        mDialog.setIndeterminate(true);
        mDialog.setCancelable(false);
        mDialog.show();


        JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.GET, "your url", null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {


                mDialog.dismiss();


            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // TODO Auto-generated method stub
                mDialog.dismiss();

            }
        }) {

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                HashMap<String, String> headers = new HashMap<String, String>();
                headers.put("Content-Type", "application/json; charset=utf-8");
                headers.put("User-agent", System.getProperty("http.agent"));
                return headers;
            }

            @Override
            public Priority getPriority() {
                return Priority.IMMEDIATE;
            }
        };

        volleyClass.addToRequestQueue(jsObjRequest);

    }

private void networkCallPostData（）{

    StringRequest stringRequest = new StringRequest(Request.Method.POST, "url",

            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    Log.e("response", response);

                }
            }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {

            System.out.println("VolleyError " + error.getMessage());
        }
    }) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<String, String>();
            params.put("id",app.getAppSettings().__uId);
            return params;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            HashMap<String, String> headers = new HashMap<String, String>();
            //headers.put("Content-Type", "application/json; charset=utf-8");
            headers.put("Content-Type", "multipart/form-data");
            headers.put("User-agent", System.getProperty("http.agent"));
            return headers;
        }

        @Override
        public Priority getPriority() {
            return Priority.IMMEDIATE;
        }

    };
    volleyClass.addToRequestQueue(stringRequest);
}

Answer 5

在Android Volley example with Error Handling

了解有关Volley错误处理的更多信息

每个Volley请求都有两个回调 - 一个用于成功，一个用于失败。基于onErrorResponse回调中VolleyError参数的类型，开发人员可以向用户显示合理的消息，如下所示

@Override
public void onErrorResponse (VolleyError error){

   if (error instanceof TimeoutError || error instanceof NoConnectionError) {
     //This indicates that the reuest has either time out or there is no connection

   } else if (error instanceof AuthFailureError) {
     // Error indicating that there was an Authentication Failure while performing the request

   } else if (error instanceof ServerError) {
     //Indicates that the server responded with a error response

   } else if (error instanceof NetworkError) {
     //Indicates that there was network error while performing the request

   } else if (error instanceof ParseError) {
      // Indicates that the server response could not be parsed

   }
}

Answer 6

/**
 * Http 访问失败
 * 
 * 
 */
@Override
public void error(VolleyError error){

     NetworkResponse response = error.networkResponse;
     if(response != null && response.data != null){
        Toast.makeText(context,"errorMessage:"+response.statusCode, Toast.LENGTH_SHORT).show();
     }else{
        String errorMessage=error.getClass().getSimpleName();       
        if(!TextUtils.isEmpty(errorMessage)){
            Toast.makeText(context,"errorMessage:"+errorMessage, Toast.LENGTH_SHORT).show();
        }
     }

}//public void error(VolleyError error) is over!  zlb

处理Volley错误

6 个答案: