communication

问题 I am currently working on a project that requires some communication over the network of a different data types from some entities of a distributed system and I am using ZMQ. The main goal of the project is to have a central node which services clients which can connect at any time. For each client connected, the central node should manage the message communication between the two. Currently, and by the moment, all communication is happening over TCP. The clients need to send and receive

问题 I am developing two applications names A and B . Application A as activity named MainActivity , service called UpdateService , BroadcastReciever called UpdateReceiver . Application B as activity named TestActivity , service called DoService , BroadcastReciever called DoReceiver . In my application B , I want to access few methods and code from MainActivity which is in Application A . In this way, I need full control of Application A code to access it in my application B . How can I achieve it

问题 Common scenario - Activity with a background Service to poll server. The Service will run periodically via AlarmManager and also perform tasks for the Activity (user hits a button, go fetch something from server). I'd like to know the best practices here. I think the best design would be the Android LocalService example: http://developer.android.com/reference/android/app/Service.html#LocalServiceSample However in the example the Activity has a reference to the activity mBoundService but there

问题 I am planning to develop an app for the gear (s) and a samsung galaxy mobile (note 3). I want the user to be able to choose from a list (same like in the gear app of samsung) of all installed apps. The notifications of the selected apps shall get sent to the gear and the notifications of the apps that are not selected in the list shall get sent to another bluetooth device. Since I know that the communication of the samsung gear is very weird, I wanted to ask if it is possible for my app to

问题 I'm writing an android App which is basically finished and functions well on a single device. I now need to create a communication between two different machines and to send information back and forth. the problem is that I have zero knowledge about how do this, and all the different guides didn't gave any begginers information about it. I understood that I need to use a third party server, but couldn't find information where to purchase one, and how to communicate with it. can you please

问题 Given the section of an application which has a UINavigationController and 2 levels of UITableViews (i.e. a row is selected on the root controller which pushes the second controller onto the navigation stack) I have the following questions: 1) There is a User object which is required by both controllers. What is the best way to communicate between the two controllers? I have seen a post on this site which mentions dependancy injection and that the root controller could pass the User object to

问题 I have troubles with UsbRequest class in Android 3.1. This is my code: ByteBuffer buffer = ByteBuffer.allocate(4096); buffer.order(ByteOrder.LITTLE_ENDIAN); UsbRequest request = new UsbRequest(); request.initialize(mConnection, mEndpointIn); request.queue(buffer, 4096); if (mConnection.requestWait() == request) { byte[] data = buffer.array(); } The size of array data is 4096, but the length of really received bytes is much more smaller. How can i determine the size of really received bytes?

问题 I have a problem with the Arduino communication. It's quite hard to describe so I cant fit it in the title. Anyway here are the following: So I have this code for my receiving end: if(Serial1.available()) { while(Serial1.available()) { uint8_t inByte = Serial1.read(); inByte = inByte ^ k; Serial.write(inByte); } Serial.println(" done"); } It's supposed to print in one line and print done when it's done. The Serial1.available() seems to skip the next Serial1.available() , I don't know what's

问题 I containerized an application which is the test driver of an automated Selenium test. The Selenium server (also called Selenium Hub) is running in another Container, as well as the Firefox Node, under localhost:4444. But my app is not able to reach it: Build info: version: 'unknown', revision: 'unknown', time: 'unknown' System info: host: '10d3b5fd1010', ip: '172.17.0.2', os.name: 'Linux', os.arch: 'amd64', os.version: '3.16.0-4-amd64', java.version: '1.8.0_11 1' Driver info: driver.version:

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