Android 处理 Volley 错误
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Handle Volley error
提问by Girish Bhutiya
I want to handle and show some message in onErrorResponse
我想处理并显示一些消息 onErrorResponse
below is my code.
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));
}
}
});
I want to handle com.android.volley.TimeoutErrorand also some other error code like 404, 503 etc and Toastmessage here.
我想在这里处理com.android.volley.TimeoutError一些其他的错误代码，如 404、503 等和Toast消息。
回答by Submersed
The networkResponse is null because in a TimeoutError no data is received from the server -- hence the timeout. Instead, you need generic client side strings to display when one of these events occur. You can check for the VolleyError's type using instanceof to differentiate between error types since you have no network response to work with -- for example:
networkResponse 为空，因为在 TimeoutError 中没有从服务器接收到数据——因此超时。相反，您需要在这些事件之一发生时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，因为您没有网络响应可以使用 - 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
}
}
回答by Naimatullah
This is what I am using in my projects.
这就是我在我的项目中使用的。
@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();
}
}
回答by Kevin Tan
You have TimeoutError and NoConnectionError as well. Super useful.
你也有 TimeoutError 和 NoConnectionError 。超级好用。
回答by Nur Gazi
you can handle the volley quick response with custom volley class like this: Volley class:
您可以像这样使用自定义排球类来处理排球快速响应：排球类：
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;
}*/
}Sinc gradle with compile 'com.android.volley:volley:1.0.0' compile 'com.squareup.okhttp3:okhttp:3.8.1'
Sinc gradle with compile 'com.android.volley:volley:1.0.0' compile 'com.squareup.okhttp3:okhttp:3.8.1'
Initialise the volley class: VolleyClass volleyClass; volleyClass = new VolleyClass(this); // under onCreate then call the method for operation 1.row data:
初始化排球类：VolleyClass volleyClass；volleyClass = new VolleyClass(this); //然后在onCreate下调用操作1.row数据的方法：
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() {
私有无效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);
}
回答by IrshadKumail
Read more about Volley Error handling at Android Volley example with Error Handling
阅读有关错误处理的Android Volley 示例中的Volley 错误处理的更多信息
Every Volley requests has two callbacks -one for success and one for failure.Based on the type of VolleyError parameter in the onErrorResponse callback developers can show a sensible message to the users as shown below
每个 Volley 请求都有两个回调 - 一个成功，一个失败。 基于 onErrorResponse 回调中的 VolleyError 参数类型，开发人员可以向用户显示一个合理的消息，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
}
}
回答by Watch Devond
/**
* 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
