playing | 易学教程

Android - How do I only allow one instance of MediaPlayer to play at a time?

阅读更多关于 Android - How do I only allow one instance of MediaPlayer to play at a time?

问题 I'm trying to create a simple Sound-board Android app, using ListView items as buttons. (Btw, I'm a novice programmer) The idea is that I press a button, and a specific sound file plays. If I press any button while a sound is playing, it should first stop that sound and then start to play the new one. Currently the sounds play without stopping any currently playing sounds, so that if I spam the buttons I get multiple sounds playing at the same time (and if I press too many at once, the app

Don't you think this might be a flawlles solution to Check if Audio() is playing?

阅读更多关于 Don't you think this might be a flawlles solution to Check if Audio() is playing?

问题 Do you think this might be a flawlles solution to Check if Audio() is playing? Like when handling a stratup theme ... Place this above in the head songStarted = false; song = new Audio(); song.src = 'audio/startuptheme.mp3'; song.addEventListener('playing', (event) => {songStarted = true;}); song.play(); And use the following script anywhere (where first user interaction should happen), as many times as you need if (!songStarted){ if (typeof song == 'undefined'){ song = new Audio(); song.src

IOS - Pause and Unpause Currently Playing Music

阅读更多关于 IOS - Pause and Unpause Currently Playing Music

问题 I am working on a IOS app that I want to have the functionality to pause and unpause music that is currently playing through the ipod, just like the ipod's play/pause button. Is there anyway to do that through IOS? The only answers I have found for this is for dealing with songs and sounds played locally through the app. Any help would be fantastic. Thanks so much! 回答1: [[MPMusicPlayerController systemMusicPlayer] play]; [[MPMusicPlayerController systemMusicPlayer] pause]; 来源： https:/

Why not all mp4 videos played on Android device?

阅读更多关于 Why not all mp4 videos played on Android device?

问题 I tried to play the following two urls by video view on Android device, the first one has worked fine but the second one is not working. the second one may needs ssl certificate but i don't know how to play it the error code appears when I am trying to play it is : E/MediaPlayer error (1, -4) I checked a link that mentioned list of error codes and it said that error(1,-4) means NotSupportedFormat. So why this error doesn't appear in the first link although both videos links are .mp4 The first

No Sound When Trying to Play Audio (.wav) Files

阅读更多关于 No Sound When Trying to Play Audio (.wav) Files

问题 I have a very simple class that can play a sound file with the following code: import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; public class Sound{ private Clip sound; public Sound(String location){ try{ sound = AudioSystem.getClip(); File file = new File(location); sound.open(AudioSystem.getAudioInputStream

Automatically Playing video in listview/scrollview similar to facebook

阅读更多关于 Automatically Playing video in listview/scrollview similar to facebook

问题 I need Video to play automatically in listview/scrollview, if view contains video. This is ver much similar with facebook. If user scrolls down and visible area contains video that system will play video and if still scroll then it automaticaly stops that video. It should work like one video should play at one time. Can someone help me on this ? sources I have gone through: Play video in Android listview How to automatically play video in listview on android app How to automatically play

IOS - Pause and Unpause Currently Playing Music

阅读更多关于 IOS - Pause and Unpause Currently Playing Music

I am working on a IOS app that I want to have the functionality to pause and unpause music that is currently playing through the ipod, just like the ipod's play/pause button. Is there anyway to do that through IOS? The only answers I have found for this is for dealing with songs and sounds played locally through the app. Any help would be fantastic. Thanks so much! Ole Begemann [[MPMusicPlayerController systemMusicPlayer] play]; [[MPMusicPlayerController systemMusicPlayer] pause]; 来源： https://stackoverflow.com/questions/7043365/ios-pause-and-unpause-currently-playing-music

How can you play a sound of a specified duration using AVAudioPlayer on iOS?

阅读更多关于 How can you play a sound of a specified duration using AVAudioPlayer on iOS?

问题 I want to play a specified duration within a sound file on IOS. I found a method in AVAudioPlayer that seeks to the begining of the playing (playAtTime:) but i cannot find a direct way to specify an end time before the end of the sound file. Is there is a way to achieve this? 回答1: If you don't need much precision and you want to stick with AVAudioPlayer , this is one option: - (void)playAtTime:(NSTimeInterval)time withDuration:(NSTimeInterval)duration { NSTimeInterval shortStartDelay = 0.01;

Playing encrypted video

阅读更多关于 Playing encrypted video

问题 What I want to do is next: We need to protect the video content(encrypt it) and be able to play it. Tricky part is that we do not want to load everything into memory at once and decrypt there.(though that is also a option) What am essentially looking for is the solution for us to play encrpyted video content, from HDD, such that only our APPLICATIOn can play that video. Yet it should read the file from block by block(because if we are dealing with 2GB file, it should not be loaded into memory