如果这是重复的，我深表歉意（请链接？）
我收到如下运行时错误：
E/AndroidRuntime(26112): FATAL EXCEPTION: AsyncTask #3
E/AndroidRuntime(26112): java.lang.RuntimeException: An error occured while executing doInBackground()
E/AndroidRuntime(26112):
at android.os.AsyncTask$3.done(AsyncTask.java:299)
E/AndroidRuntime(26112):
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
E/AndroidRuntime(26112):
at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
E/AndroidRuntime(26112):
at java.util.concurrent.FutureTask.run(FutureTask.java:239)
E/AndroidRuntime(26112):
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
E/AndroidRuntime(26112):
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
E/AndroidRuntime(26112):
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
E/AndroidRuntime(26112):
at java.lang.Thread.run(Thread.java:856)
E/AndroidRuntime(26112):
Caused by: org.scribe.exceptions.OAuthException: Problems while creating connection.
E/AndroidRuntime(26112):
at org.scribe.model.Request.send(Request.java:70)
E/AndroidRuntime(26112):
at org.scribe.model.OAuthRequest.send(OAuthRequest.java:12)
E/AndroidRuntime(26112):
at com.notbyimgur.imguraffe.ImageGridActivity$getAccountData.doInBackground(ImageGridActivity.java:1091)
E/AndroidRuntime(26112):
at com.notbyimgur.imguraffe.ImageGridActivity$getAccountData.doInBackground(ImageGridActivity.java:1)
E/AndroidRuntime(26112):
at android.os.AsyncTask$2.call(AsyncTask.java:287)
E/AndroidRuntime(26112):
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
E/AndroidRuntime(26112): ... 4 more
E/AndroidRuntime(26112): Caused by: java.io.EOFException
E/AndroidRuntime(26112): at libcore.io.Streams.readAsciiLine(Streams.java:203)
E/AndroidRuntime(26112): at libcore.net.http.HttpEngine.readResponseHeaders(HttpEngine.java:573)
E/AndroidRuntime(26112): at libcore.net.http.HttpEngine.readResponse(HttpEngine.java:821)
E/AndroidRuntime(26112):
at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:283)
E/AndroidRuntime(26112):
at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:495)
E/AndroidRuntime(26112):
at libcore.net.http.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:134)
E/AndroidRuntime(26112): at org.scribe.model.Response.<init>(Response.java:28)
E/AndroidRuntime(26112): at org.scribe.model.Request.doSend(Request.java:110)
E/AndroidRuntime(26112): at org.scribe.model.Request.send(Request.java:62)
E/AndroidRuntime(26112): ... 9 more
代码：
只发布了有问题的部分。同一活动中有多个 OAuth 请求（都在单独的 asynctask 类中），如果这很重要，它们可能同时执行。
public class getAccountData extends AsyncTask<Void, Void, dataModels.Account>
{
private String url = "";
private String accessToken = "";
private Client_IDs CLID= new Client_IDs();
public getAccountData(String urlin, AuthenticationToken autht)
{
url = urlin;
accessToken = autht.accessToken;
}
@Override
protected dataModels.Account doInBackground(Void... params) {
OAuthService service = new ServiceBuilder()
.provider(ImgUr3Api.class)
.apiKey(CLID.CLIENT_ID)
.apiSecret(CLID.CLIENT_SECRET)
.debug()
.build();
OAuthRequest request = new OAuthRequest(Verb.GET, url);
request.setConnectionKeepAlive(true);
service.signRequest(new Token(accessToken, null), request);
Response response = request.send();
if(response.getBody() != null)
{ String body = response.getBody();
dataModels.Account account = new dataModels.Account();
JSONObject rawData;
try {
rawData = new JSONObject(body);
if(rawData.getBoolean("success"))
{
JSONObject data = rawData.getJSONObject("data");
account.id = data.getInt("id");
account.bio = data.getString("bio");
account.url = data.getString("url");
account.reputation = (int)data.getDouble("reputation");
}
} catch (JSONException e) {
e.printStackTrace();
}
return account;
}
return null;
}
@Override
protected void onPostExecute(dataModels.Account account)
{
if(account !=null)
{
userAcc.id = account.id;
userAcc.bio = account.bio;
userAcc.reputation = account.reputation;
userAcc.url = account.url;
if(!isCancelled())
finalizeSlider(true);
}
}
}
我试过切换request.setConnectionKeepAlive(true/false)没有任何积极的结果。除此之外，我对还能尝试什么一无所知。请指教。
这是来自的代码org.scribe.model.Request class (Scribe library)
package org.scribe.model;
import java.io.*;
import java.net.*;
import java.nio.charset.*;
import java.util.*;
import java.util.concurrent.*;
import org.scribe.exceptions.*;
/**
* Represents an HTTP Request object
*
* @author Pablo Fernandez
*/
public class Request
{
private static final String CONTENT_LENGTH = "Content-Length";
private static final String CONTENT_TYPE = "Content-Type";
private static RequestTuner NOOP = new RequestTuner() {
@Override public void tune(Request _){}
};
public static final String DEFAULT_CONTENT_TYPE = "application/x-www-form-urlencoded";
private String url;
private Verb verb;
private ParameterList querystringParams;
private ParameterList bodyParams;
private Map<String, String> headers;
private String payload = null;
private HttpURLConnection connection;
private String charset;
private byte[] bytePayload = null;
private boolean connectionKeepAlive = false;
private boolean followRedirects = true;
private Long connectTimeout = null;
private Long readTimeout = null;
/**
* Creates a new Http Request
*
* @param verb Http Verb (GET, POST, etc)
* @param url url with optional querystring parameters.
*/
public Request(Verb verb, String url)
{
this.verb = verb;
this.url = url;
this.querystringParams = new ParameterList();
this.bodyParams = new ParameterList();
this.headers = new HashMap<String, String>();
}
/**
* Execute the request and return a {@link Response}
*
* @return Http Response
* @throws RuntimeException
* if the connection cannot be created.
*/
public Response send(RequestTuner tuner)
{
try
{
createConnection();
return doSend(tuner);
}
catch (Exception e)
{
throw new OAuthConnectionException(e);
}
}
public Response send()
{
return send(NOOP);
}
private void createConnection() throws IOException
{
String completeUrl = getCompleteUrl();
if (connection == null)
{
System.setProperty("http.keepAlive", connectionKeepAlive ? "true" : "false");
connection = (HttpURLConnection) new URL(completeUrl).openConnection();
connection.setInstanceFollowRedirects(followRedirects);
}
}
/**
* Returns the complete url (host + resource + encoded querystring parameters).
*
* @return the complete url.
*/
public String getCompleteUrl()
{
return querystringParams.appendTo(url);
}
Response doSend(RequestTuner tuner) throws IOException
{
connection.setRequestMethod(this.verb.name());
if (connectTimeout != null)
{
connection.setConnectTimeout(connectTimeout.intValue());
}
if (readTimeout != null)
{
connection.setReadTimeout(readTimeout.intValue());
}
addHeaders(connection);
if (verb.equals(Verb.PUT) || verb.equals(Verb.POST))
{
addBody(connection, getByteBodyContents());
}
tuner.tune(this);
return new Response(connection);
}
void addHeaders(HttpURLConnection conn)
{
for (String key : headers.keySet())
conn.setRequestProperty(key, headers.get(key));
}
void addBody(HttpURLConnection conn, byte[] content) throws IOException
{
conn.setRequestProperty(CONTENT_LENGTH, String.valueOf(content.length));
// Set default content type if none is set.
if (conn.getRequestProperty(CONTENT_TYPE) == null)
{
conn.setRequestProperty(CONTENT_TYPE, DEFAULT_CONTENT_TYPE);
}
conn.setDoOutput(true);
conn.getOutputStream().write(content);
}
/**
* Add an HTTP Header to the Request
*
* @param key the header name
* @param value the header value
*/
public void addHeader(String key, String value)
{
this.headers.put(key, value);
}
/**
* Add a body Parameter (for POST/ PUT Requests)
*
* @param key the parameter name
* @param value the parameter value
*/
public void addBodyParameter(String key, String value)
{
this.bodyParams.add(key, value);
}
/**
* Add a QueryString parameter
*
* @param key the parameter name
* @param value the parameter value
*/
public void addQuerystringParameter(String key, String value)
{
this.querystringParams.add(key, value);
}
/**
* Add body payload.
*
* This method is used when the HTTP body is not a form-url-encoded string,
* but another thing. Like for example XML.
*
* Note: The contents are not part of the OAuth signature
*
* @param payload the body of the request
*/
public void addPayload(String payload)
{
this.payload = payload;
}
/**
* Overloaded version for byte arrays
*
* @param payload
*/
public void addPayload(byte[] payload)
{
this.bytePayload = payload.clone();
}
/**
* Get a {@link ParameterList} with the query string parameters.
*
* @return a {@link ParameterList} containing the query string parameters.
* @throws OAuthException if the request URL is not valid.
*/
public ParameterList getQueryStringParams()
{
try
{
ParameterList result = new ParameterList();
String queryString = new URL(url).getQuery();
result.addQuerystring(queryString);
result.addAll(querystringParams);
return result;
}
catch (MalformedURLException mue)
{
throw new OAuthException("Malformed URL", mue);
}
}
/**
* Obtains a {@link ParameterList} of the body parameters.
*
* @return a {@link ParameterList}containing the body parameters.
*/
public ParameterList getBodyParams()
{
return bodyParams;
}
/**
* Obtains the URL of the HTTP Request.
*
* @return the original URL of the HTTP Request
*/
public String getUrl()
{
return url;
}
/**
* Returns the URL without the port and the query string part.
*
* @return the OAuth-sanitized URL
*/
public String getSanitizedUrl()
{
return url.replaceAll("\\?.*", "").replace("\\:\\d{4}", "");
}
/**
* Returns the body of the request
*
* @return form encoded string
* @throws OAuthException if the charset chosen is not supported
*/
public String getBodyContents()
{
try
{
return new String(getByteBodyContents(),getCharset());
}
catch(UnsupportedEncodingException uee)
{
throw new OAuthException("Unsupported Charset: "+charset, uee);
}
}
byte[] getByteBodyContents()
{
if (bytePayload != null) return bytePayload;
String body = (payload != null) ? payload : bodyParams.asFormUrlEncodedString();
try
{
return body.getBytes(getCharset());
}
catch(UnsupportedEncodingException uee)
{
throw new OAuthException("Unsupported Charset: "+getCharset(), uee);
}
}
/**
* Returns the HTTP Verb
*
* @return the verb
*/
public Verb getVerb()
{
return verb;
}
/**
* Returns the connection headers as a {@link Map}
*
* @return map of headers
*/
public Map<String, String> getHeaders()
{
return headers;
}
/**
* Returns the connection charset. Defaults to {@link Charset} defaultCharset if not set
*
* @return charset
*/
public String getCharset()
{
return charset == null ? Charset.defaultCharset().name() : charset;
}
/**
* Sets the connect timeout for the underlying {@link HttpURLConnection}
*
* @param duration duration of the timeout
*
* @param unit unit of time (milliseconds, seconds, etc)
*/
public void setConnectTimeout(int duration, TimeUnit unit)
{
this.connectTimeout = unit.toMillis(duration);
}
/**
* Sets the read timeout for the underlying {@link HttpURLConnection}
*
* @param duration duration of the timeout
*
* @param unit unit of time (milliseconds, seconds, etc)
*/
public void setReadTimeout(int duration, TimeUnit unit)
{
this.readTimeout = unit.toMillis(duration);
}
/**
* Set the charset of the body of the request
*
* @param charsetName name of the charset of the request
*/
public void setCharset(String charsetName)
{
this.charset = charsetName;
}
/**
* Sets whether the underlying Http Connection is persistent or not.
*
* @see http://download.oracle.com/javase/1.5.0/docs/guide/net/http-keepalive.html
* @param connectionKeepAlive
*/
public void setConnectionKeepAlive(boolean connectionKeepAlive)
{
this.connectionKeepAlive = connectionKeepAlive;
}
/**
* Sets whether the underlying Http Connection follows redirects or not.
*
* Defaults to true (follow redirects)
*
* @see http://docs.oracle.com/javase/6/docs/api/java/net/HttpURLConnection.html#setInstanceFollowRedirects(boolean)
* @param followRedirects
*/
public void setFollowRedirects(boolean followRedirects)
{
this.followRedirects = followRedirects;
}
/*
* We need this in order to stub the connection object for test cases
*/
void setConnection(HttpURLConnection connection)
{
this.connection = connection;
}
@Override
public String toString()
{
return String.format("@Request(%s %s)", getVerb(), getUrl());
}
}