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POhow to get javafx media metadata without listener
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  1. POhow to get javafx media metadata without listener
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    copied!<p>so I've been looking for this for a week now and reading though every problem similar but none seemed to ask the same problem as mine exactly(try reverse engineering other solution similar to what I want with no success.</p> <p>explained caveman style: I'm trying to create list using Metadata.</p> <ol> <li>I open with a multi dialog and select more than one mp3</li> <li>I put the file in an <code>ArrayList&lt;File&gt;</code></li> <li>I loop though the files with an enhanced for loop and extract metadata using a media variable</li> <li>The info for the metadata ( like "artist") is what i want to save in an ArrayList for example</li> </ol> <p>the problem is that the listener only works way after the enhanced loop has finished which results in <code>ArrayList&lt;String&gt;</code> having one object with nothing in it </p> <p>here is a sample:</p> <pre><code>ArrayList&lt;String&gt; al; String path; public void open(){ files=chooser.showOpenMultipleDialog(new Stage()); for( File f:files){ path=f.getPath(); Media media = new Media("file:/"+path.replace("\\", "/").replace(" ", "%20")); al= new ArrayList&lt;String&gt;(); media.getMetadata().addListener(new MapChangeListener&lt;String, Object&gt;() { public void onChanged(Change&lt;? extends String, ? extends Object&gt; change) { if (change.wasAdded()) { if (change.getKey().equals("artist")) { al.add((String) change.getValueAdded()); } } } }); }//close for loop //then i want to see the size of al like this system.out.println(al.size()); //then it returns 1 no matter how much file i selected //when i system out "al" i get an empty string </code></pre>
 

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