问题描述
我用它来在我的Vaadin应用程序之一中显示html5音频.当我只是在浏览器中请求数据并保存文件时，就可以播放该文件-但是当我在Vaadin中尝试播放该文件时，总是失败.
I use this to display html5 audio in one of my Vaadin application. When I simply requst the data in browser, and save the file, it can be played - but it always fails to do so, when I try it in Vaadin.
您能指出我在做什么错吗?
Can you point out, what am I doing wrong?
public class AudioArea extends Audio {
public AudioArea(final int soundId) {
super();
StreamResource resource = new StreamResource(
new StreamResource.StreamSource() {
public InputStream getStream() {
byte[] data = MyVaadinUI.request.getBinaryData(
soundId, BinaryDataSource.TYPE_SOUND, 0, 0);
if (data == null) {
return null;
}
return new ByteArrayInputStream(data);
}
}, "");
setSource(resource);
markAsDirty();
}
}
推荐答案
您确定您的浏览器支持该格式吗?如果您尝试使用纯HTML格式，可以播放吗?
如果浏览器支持该格式，那么我建议这样做:
Are you sure that your browser supports the format? If you try it with plain html can you play it?
If the browser supports the format, then I suggest this:
Audio audio = new Audio("MyAudio");
audio.setSource(new ThemeResource("audio/myAudio.m4a"));
myLayout.addComponent(audio);
您可以将文件放在主题文件夹下(或者可以使用FileResource代替).
And you could put the file under your theme folder (or you can use FileResource instead).
编辑
也许是缺少的MIME类型是问题所在
Maybe the missing MIME Type is the problem:
StreamResource resource = new StreamResource(
new StreamResource.StreamSource() {
public InputStream getStream() {
byte[] data = MyVaadinUI.request.getBinaryData(
soundId, BinaryDataSource.TYPE_SOUND, 0, 0);
if (data == null) {
return null;
}
return new ByteArrayInputStream(data);
}
}, "") {
@Override
public String getMIMEType() {
return "audio/mp4";
}
};
这篇关于Vaadin音频元素在播放.m4a声音文件时不起作用(Vaadin 7.3.2)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！