connection

问题 I'm planning on writing a debug app (for my Android device) that can send data back to my PC via Bluetooth. Can a single Bluetooth dongle on my PC connect to multiple Android devices simultaneously, or do I need one dongle per connection? Thanks! 回答1: This belongs to the Android Stackexchage. Anyways you can pair with multiple BT devices with most dongles. 回答2: The answer is 7 simultaneous connections from the PC dongle 来源： https://stackoverflow.com/questions/6307799/how-many-client-devices

问题 I'm debugging in VS2010. BIO_do_connect() fails in the following code. What am I doing wrong? (pBio is properly set up before use) static const uint32_t kuSleepIntervalInMs = 50; ... uint32_t uTimeTaken = 0; ... BIO_set_nbio(pBio, 1); for (;;) { if (uTimeTaken > 10000) return ERR_CONNECTION_TIMED_OUT; if (BIO_do_connect(pBio) > 0) break; if (BIO_should_retry(pBio)) { Sleep(kuSleepIntervalInMs); uTimeTaken += kuSleepIntervalInMs; continue; } BIO_free_all(pBio); return ERR_FAILED_TO_ESTABLISH

问题 I have two projects(P1 & P2) which are two different systems, each one has its GUI (GUI1 & GUI2). GUI1's output must be GUI2's input. In order to pass all the information from GUI1 to GUI2, I have added P1 as a dependent project of P2. With this, I have access to all the functions in P1 but I can´t get the modified data created after running GUI1( GUI1 is package of P1). As you can see GUI1 has several tabs in which loaded data from external files is modified and new variables/data is created

问题 Currently, I connect my tablet to other devices (through Bluetooth). The connection is successful, but if the activity is paused and stopped, say when the home screen is pressed, it will disconnect for sure. I can always reconnect in OnStop() or something, but I want to maintain the connection throughout, unless the app process is destroyed altogether. How should I go about this? 回答1: Handling that in your Activity is not a way to go - as you noticed, Activities stop executing and drop your

问题 Trying to figure out is it possible to send sms or make phone call from PC to a real device. I know how to do it using an Emulator. tty localhost port... Does real device got a port? I just started learning Android stuff.So, thx for helping ^_^! 回答1: One way to communicate between a PC and a phone would be if they were both on the same local network, perhaps both connected to the same WiFi router. When I've had to do this in the past I've looked in my router control panel to see the IP

问题 I have a custom stream that I am using with WCF for large BLOBs from the database. It reads the data in chunks. What is the best way to handle the connection for the stream? Should I just open it at the construction or open/close it with each chuck read? Thanks. 回答1: I would load the entire blob into a memory stream then let WCF handle the Streaming and Chunking. You can enable streaming in the transportBindings, or look into using MTOM. [ServiceContract] public class ContentService {

问题 I have a local WordPress installation setup that uses a remote MySQL DB connection. The MySQL server is my VPS, and my VPS is also the DNS server. I have MySQL setup with the skip-name-resolve option, as suggested by other posts. The connection still takes a good 5 seconds to load though. I'm using BIND inside Webmin to manage my DNS. I am no expert by any means... Any ideas on how to improve performance between my local machine and MySQL remote server? Note: if it's relevant, when I run a

问题 Calling read.table() function (on a CSV file), as follows: download.file(url, destfile = file, mode = "w") conn <- gzcon(bzfile(file, open = "r")) try(fileData <- read.table(conn, sep = ",", row.names = NULL), silent = FALSE) produces the following error: Error in pushBack(c(lines, lines), file) : can only push back on text-mode connections I tried to “wrap” the connection explicitly by tConn <- textConnection(readLines(conn)) [and then, certainly, passing tConn instead of conn to read.table(

问题 Say we have a server which can serve only 4 HttpRequests at max at a time. If 10 Http requests come, what will happen? What are the various options? Will the new requests be abandoned or kept in waiting ? Is this configurable? Is this dependent on the framework? If they are kept in waiting, where are those requests stored? Does load balancer take care of it? Does the developer need to take care of this in his code by building some queue? These questions were asked to me in an interview

问题 I'm testing an iPhone app with push notifications. In the last 5 days I got it working few times (and it usually worked for consecutive notifications in a range of time of few minutes). Instead I almost always get the error message: "Connection failed". Since it worked few times, I assume the code to be correct, and the certificates valid as well. So I have no clue how to solve this. I've also tried to connect multiple times with the following code: $ctx = stream_context_create(); stream