我正在使用异步发布方法将一些数据发布到服务器。该帖子工作正常，但如果服务器关闭或无响应，那么我将在应用程序中强制关闭。
我应该如何对发布请求实施超时？
这是异步发布到特定 url 的类：
//===================================================================================================================================
//sending EmailAddress and Password to server
//===================================================================================================================================
private class MyAsyncTask extends AsyncTask<String, Integer, Double>{
@Override
protected Double doInBackground(String... params) {
// TODO Auto-generated method stub
postData(params[0],params[1]);
return null;
}
protected void onPostExecute(Double result){
if(responseBody.contains("TRUE"))
{
String raw=responseBody;
raw = raw.substring(0, raw.lastIndexOf("<"));
raw = raw.substring(raw.lastIndexOf(">") + 1, raw.length());
String [] contents = raw.split(",");
//extracting user name and user id from response
String user_name=contents[1];
String student_code=contents[2];
//save user name and user id in preference
saveInPreference("user_name",user_name);
saveInPreference("student_code",student_code);
//login is successful, going to next activity
Intent intent = new Intent(LoginActivity.this, TakeTestActivity.class);
//hiding progress bar
progress.dismiss();
finish();
LoginActivity.this.startActivity(intent);
}
else
{
//hiding progress bar
progress.dismiss();
create_alert("Attention!", "Please provide valid userid and password");
}
}
protected void onProgressUpdate(Integer... progress){
}
public void postData(String emailId,String passwrd) {
**//EDIT START**
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 10000);
HttpConnectionParams.setSoTimeout(httpParams, 10000);
HttpClient httpclient = new DefaultHttpClient(httpParams);
**//EDIT END**
// Create a new HttpClient and Post Header
//HttpClient httpclient = new DefaultHttpClient();
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(LoginActivity.this);
final String url_first = preferences.getString("URLFirstPart","");
HttpPost httppost = new HttpPost(url_first+"ValidateLogin");
try {
// Data that I am sending
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("EmailId", emailId));
nameValuePairs.add(new BasicNameValuePair("Password", passwrd));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
**//EDIT START**
try
{
// Execute HTTP Post Request
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
responseBody = EntityUtils.toString(response.getEntity());
}
catch (SocketTimeoutException ex)
{
// Do something specific for SocketTimeoutException.
}
**//EDIT END**
//Log.d("result", responseBody);
}
catch (Throwable t ) {
}
}
}
//===================================================================================================================================
//END sending EmailAddress and Password to server
//===================================================================================================================================
这就是我调用类来执行发布请求的方式：
//sending request for login
new MyAsyncTask().execute(txtUsername.getText().toString(),txtPassword.getText().toString());
如果服务器没有响应或不可用，我应该怎么做才能在特定时间后实现连接超时？
编辑：
如何使用警报通知用户连接已超时？我应该把警报放在哪里以及在什么情况下？
提前致谢！