radio | 易学教程

How can I control system sound volume with a TrackBar?

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问题 I'm a beginner and making an internet radio player and I want to control the volume with my own TrackBar . How is that possible? I haven't found any solutions to do this. 回答1: Take a look at NAudio. this is a brilliant API for implementing audio based applications in .NET http://naudio.codeplex.com/ Also consider this how to Control "Windows XP Volume Control" with VC# This might also help. This explains how to hook the Win32 API Multimedia library (winmm.dll) to control system volume http:/

radio buttons post show value even none of the buttons are checked how to validate this?

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问题 I have a registration form wich has a gender radio option showing male or female. in the HTML none are checked because i want the user to check one. like this: <label class="radio"> <input type="radio" name="gender" id="optionsRadios1" value="female">Female </label> <label class="radio"> <input type="radio" name="gender" id="optionsRadios2" value="male">Male </label> I submit data trough jquery ajax. The strange thing is that the post of al inputs shows [gender] => male if you submit the form

iPhone : Simple Radio App

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问题 i am made a simple radio app which call out safari to stream audio/radio. My problem is that i don't konw how to get back control and show other content while safari is playing music. Of course i do not want the user to have to get out of the app and re-enter. I am thinking a tabbed app but i need your help to regain control. NSURL *url = [NSURL URLWithString:@"http://www.piratefm.gr/128.m3u"]; NSURLRequest *req = [NSURLRequest requestWithURL:url]; [webView loadRequest:req]; [super

Compile error when creating packet

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问题 I'm studying THIS tutorial for tinyos and I wanted to try it out. I try to create the packet but it gives me the following error. I don't know what's wrong. It is probably something simple but I can't figure out what it is. #include "TestMsg.h" ... event void AMControl.startDone(error_t error) { if (error == SUCCESS) { call Leds.led0On(); //create packet TestMsg_t* msg = call Packet.getPayload(&packet, sizeof(TestMsg_t)); msg->NodeID = TOS_NODE_ID; // // //TODO in the meantime this can change

HTML5 stream m3u radio player

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问题 I have a problem with building HTML5 audio player using m3u format. I have tried do it like this: <audio id="audio-player" src="http://fm101.uz:9900/mobile.m3u" type="audio/aacp" controls="controls"></audio> 回答1: Instead of the m3u extension use the true url , you can discover this url opening the m3u file on winamp (or another audio program) and on the playlist window, right-click, properties and you can see "http://fm101.uz:9900/fm101_high" or something similar. <audio src="http://fm101.uz

Flutter——Radio组件、RadioListTile组件（单选按钮组件）

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Radio组件 Radio组件的常用属性：属性描述 value 单选的值 onChanged 改变时触发 activeColor 选中的颜色、背景颜色 groupValue 选择组的值 import 'package:flutter/material.dart'; void main() { runApp(MaterialApp( title: "Radio", home: MyApp(), )); } class MyApp extends StatefulWidget { @override _MyAppState createState() => _MyAppState(); } class _MyAppState extends State<MyApp> { int sex = 1; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: Text("Radio")), body: Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Row( mainAxisAlignment: MainAxisAlignment.center, children:

Modify the text of my radio input button?

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问题 Your average radio button has a name and value, but also some text next to it, in this case "Change this text." How can I change this in javascript? Or even alert it? AFAIK, it is NOT the .inner html. HTML: <input type="radio" name="radioOption1" value="Array 1"> Change this text Javascript var confirmIExist = document.getElementsByName("radioOption1"); alert(confirmIExist.innerHTML); //alerts undefined If it's not .innerHTML, what is it? if I grab the input object with either

Keep radio button form from submitting when nothing is checked jquery

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问题 How do I go about having this not submit when nothing is checked, but then having it submit when one is checked? It currently submits either way. What am I missing here? It throws up the error I want it to when nothing is checked "Please check one of the options above" but then goes to the landing page. Thank you for any help! $(document).ready(function () { $("#submitbutton").click(function () { var none_answered = true; $("input:radio").each(function () { var name = $(this).attr("name"); if

Angularjs - How to change background color using radio button

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问题 On my page, I have dynamically created radio buttons. I want to change wrapper background color when radio button is selected. following is my code <section ng-repeat="list in myList"> <div class="radioWrapper"> <input type="radio" name="{{list.category}}" ng-model="list.name"> <label>{{list.name}} </label> </div> </section> I want to add "selectedRadioBg" class at the radioWrapper when each radio is selected. Appreciate any help 回答1: <section ng-repeat="list in myList"> <div ng-class=

Live Flash Player for m3u File

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问题 I'm searching for a Flash Player that can play a m3u File. I can open m3u file with Windows Media Player, but I want to embed into my blog. I have the URL of m3u file. It is used for a radio station. How can I do this? 回答1: JWPlayer does this. You just have to pass it correct parameter. Here is an exact snippet: https://stackoverflow.com/a/6871647/141200 If your wordpress, their Wordpress plugin works great: http://wordpress.org/extend/plugins/jw-player-plugin-for-wordpress/ Shortcode snippet