broadcast

问题 I need to disable IPv6. For that the java documentation indicates setting jvm property java.net.preferIPv4Stack=true . But I don't understand how to do it from the code itself. Many forums demonstrated doing it from the command prompt, but I need to do it at runtime. 回答1: You can use System.setProperty("java.net.preferIPv4Stack" , "true"); This is equivalent to passing it in the command line via -Djava.net.preferIPv4Stack=true 回答2: Another approach, if you're desperate and don't have access

问题 I want to calculate the broadcast address for: IP: 192.168.3.1 Subnet: 255.255.255.0 = 192.168.3.255 in C. I know the way (doing fancy bitwise OR's between the inversed IP and subnet), but my problem is I come from the green fields of MacOSX Cocoa programing. I looked into the source of ipcal, but wasn't able to integrate it into my code base. There must be a simple ten lines of code somewhere on the internet, I just can't find it. Could someone point me to a short code example of how to do

问题 recently I follow the steps given from Developer.Android.Com But it seems i have a few luck over there. I tried to discover the available peers nearby, put 'em into the arraylist but seems no luck. I didnt get anything. My Actual 2 Devices are actually android 4.1 and 4.2 Since Wifi Direct is based on API Level 14 which is android 4.0+ so i think my real device is not the problem. The concept I use is using 1 activity and 1 BroadCast Receiver. Please take a look at my code, did I put it

问题 I use laravel 5.3 I created an online store website. If user logs in and chooses a product then okay button, there will be realtime notification in icon cart. My code looks like this : If user selects product and okay button, it will run this function : public function addNotificationCart() { Notification::send(auth()->user(), new CartNotification($cart)); } Then : public function toBroadcast($notifiable) { return new BroadcastMessage([ 'id' => $this->data->id, 'time' => $this->data->created

问题 I want to discover the printers in my sub-net. Can I do that using net-snmp as mentioned in this following link- https://sourceforge.net/p/net-snmp/bugs/2336/ But it doesn't seem to work? Should I enable any flag for broadcast in snmp_api to do that. Also how will I go about handling the responses? Could you explain me in context of this simple application- http://www.net-snmp.org/wiki/index.php/TUT:Simple_Application I'm new to SNMP. Any help is much appreciated. PS: I use net-snmp 5.7.2.1

问题 I have created a Client Server Application using UDP Sockets. The Application works fine as there is only one server and one client. but now I want to make my Server "BROADCAST". How can I do it?| I had been trying to do it but it gives error at BIND function and returns an error "10049". here is my code snippet: #define broadcastPort 8888 WSADATA wsa; SOCKET s; //Initialise winsock printf("\nInitialising Winsock..."); if (WSAStartup(MAKEWORD(2,2),&wsa) != 0) { printf("Failed. Error Code : %d

问题 I use these code to take a photo and broadcast the photo to gallery, it works. I found that my broadcast function use MediaStore.Images.ImageColumns.DATA and Intent.ACTION_MEDIA_SCANNER_SCAN_FILE , and these are deprecated! How can I replace these function without use MediaStore.Images.ImageColumns.DATA and Intent.ACTION_MEDIA_SCANNER_SCAN_FILE . Thank you. // set open camera button. private void setCameraButton() { cameraBtn.setOnClickListener(new View.OnClickListener() { @Override public

问题 I use laravel 5.3 I make routes/channels.php like this : <?php Broadcast::channel('messages', function() { return true; }); If I input the data cart and click submit, it will run this : this.$http.post(window.BaseUrl + '/guest/add-notification', {cart_data: JSON.stringify(data)}); It will call function on the controller The function like this : public function addNotification(Request $request){ $input = $request->only('cart_data'); $data = json_decode($input['cart_data'], true); event(new

问题 I've a service that is receiving UDP data from the network. I want to push this data from the service to a UI activity. One way to do it is using broadcast Intents . What is the performance overhead of sending broadcasts frequently from the service to the activities? Are there any other alternatives for doing this ? Thanks. 回答1: Not sure of the overhead of Broadcasting Intents but a topic similar to this was discussed a few days ago. 来源： https://stackoverflow.com/questions/3149339

问题 In my AngularJS app, I have three controllers. One is the main controller and the other two are siblings. I have Sibling control 1 to emit data to Main control , which broadcasts the data, which sibling control 2 then picks up. Sibling control 1 $scope.selectedPatentFx; $scope.$watch('selectedPatentFx', function(newValue, oldValue){ if($scope.selectedPatentFx) { $scope.$emit('calculateFx', {patentfx: newValue}); } }) Main control $scope.$on('calculateFx', function(event, obj){ $scope.