broadcast

问题 Hi am trying to use broadcast receiver to trigger some action Activity A will broadcast action "ACTION_EXIT" and come to Main Activity. Whenever Main Activity receive the broadcast "ACTION_EXIT" it will close the app. My code on Activity A (to send broadcast) Intent broadcastIntent = new Intent(Beacon_MainActivity.this, MainActivity.class); broadcastIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); broadcastIntent.setAction("com.package.ACTION_EXIT"); sendBroadcast(broadcastIntent); finish();

问题 Please if you can help me about my problem. On one side I have server with IP 172.27.13.2 connected to the WAN interface of router 172.27.13.1 ...Then on wireless LAN of my router 192.168.1.1 I have connected a few clients. Now I will write code in C where client are requesting some UDP streams from server, then server broadcasts streams to clients, and if some packets get lost clients must send NACK to server. My questions is: Because server and clients are on different subnets how can I

问题 I'm trying to send a broadcast and then let the server reply to it: public static void SendBroadcast() { byte[] buffer = new byte[1024]; var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1); socket.Connect(new IPEndPoint(IPAddress.Broadcast, 16789)); socket.Send(System.Text.UTF8Encoding.UTF8.GetBytes("Anyone out there?")); var ep = socket.LocalEndPoint; socket.Close(); socket =

问题 I am trying to write some code that does a UDP broadcast, and then listens to replies from remote servers saying they exist. It's used to identify machines running a server app on the subnet so basically sends out a "who's there?" and listens for all the replies. I have this in Java (works perfectly) where it sends a DatagramPacket broadcasting to a group address of 224.168.101.200. and then has a worker thread that keeps listening for incoming DatagramPackets coming in on the same socket.

问题 Here's my problem: I have quite a big set of doubles (it's an array of 77.500 doubles) to be stored somewhere in cuda. Now, I need a big set of threads to sequentially do a bunch of operations with that array. Every thread will have to read the SAME element of that array, perform tasks, store results in shared memory and read the next element of the array. Note that every thread will simultaneously have to read (just read) from the same memory location. So I wonder: is there any way to

问题 I'm trying to use service-worker with my Angular Application. It is build using webpack. I use workbox-webpack-plugin. I want to serve my GET API calls form cache and in the background update the data. FOr this, I use the option runtimeCaching with the handler staleWhileRevalidate (more details on GenerateSW plugin here) This is the config I have in webpack.config.js: new GenerateSW({ // importWorkboxFrom: 'local', clientsClaim: true, skipWaiting: true, navigateFallback: '/index.html',

问题 I am trying to play some tone when my application is in background and I press on " Camera " button for that I am doing this simple steps. Creating BroadcastReceiver class public class CameraButtonListener extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { ToneGenerator tone = new ToneGenerator(AudioManager.STREAM_DTMF, 100); tone.startTone(0,2000); abortBroadcast(); } } Register BrodcastReceiver in onCreate methode. @Override public void onCreate

问题 I've created a library for sending and receiving UDP broadcasts using a WiFi network, and my code works fine, I tried it using a Nexus 5 and a Samsung Galaxy S2 and the communication works great, they both send and receive. When I try my same code with a Moto G , the device can send packages to other phones, but can't receive anything. I can blame the Moto G because the code works great in other two devices and they both can receive the packages that the Moto G sends. I even tried two

问题 If I have an array of numerical values, which had to use object pointers instead of values as the data type, due to unequal vector lengths: In [145]: import numpy as np In [147]: a = np.array([[1,2],[3,4,5]]) In [148]: a Out[148]: array([[1, 2], [3, 4, 5]], dtype=object) In [150]: np.sin(a) --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-150-58d97006f018> in <module>() ----> 1 np.sin(a) In [152]: np

问题 I am writing a pure websocket web application, meaning that prior to the websocket upgrade there is no user/client step, more specifically: Authentication request goes over websockets as does the rest of the communication There is/are: Exactly ONE websocket endpoint on /api/ws Multiple clients connected to that endpoint Multiple projects for multiple clients Now, not each client has access to each project - the access control for that is implemented on the server side (ofc) and has nothing to