我一直在关注这个主题的各种问题的各种答案,我得出了一些结果和一些看似有效的代码。我对它的NSURL部分感到困惑。我的iOS胶子项目的assets文件夹中有2个mp3曲目。我已经制作了IOSAudioService类来处理播放。我正在从视图中的播放按钮传递一个参数到Play()方法。除了实际文件之外的所有内容都正在注册为正常工作。我得到一个NSError,从查看代码是一个nil值,所以参数未正确传递或无法找到该文件。代码如下。
public AVAudioPlayer backgroundMusic;
private double currentPosition;
NSURL songURL = null;
@Override
public void Play(String filename){
songURL = new NSURL(filename);
try {
if (backgroundMusic != null) {
Resume();
}
else {
//Start the audio at the beginning.
currentPosition = 0;
backgroundMusic = new AVAudioPlayer(songURL);
//create the mendia player and assign it to the audio
backgroundMusic.prepareToPlay();
backgroundMusic.play();}
//catch the audio error
} catch(NSErrorException e) {
System.out.println("error: " + e);
}
}
@Override
public void Stop() {
backgroundMusic.stop();
backgroundMusic = null;
}
@Override
public void Pause() {
currentPosition = backgroundMusic.getCurrentTime();
backgroundMusic.pause();
}
@Override
public void Resume() {
backgroundMusic.setCurrentTime(currentPosition);
backgroundMusic.play();
}
try {
services = (AudioService) Class.forName("com.gluonhq.charm.down.plugins.ios.IOSAudioService").newInstance();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
System.out.println("Error " + ex);
}
我在获取NSExceptionError e。
的catch块时收到错误 if (services != null) {
final HBox hBox = new HBox(10,
MaterialDesignIcon.PLAY_ARROW.button(e -> services.Play("/audio.mp3")),
MaterialDesignIcon.PAUSE.button(e -> {
if (!pause) {
services.Pause();
pause = true;
} else {
services.Resume();
pause = false;
}
}),
MaterialDesignIcon.STOP.button(e -> services.Stop()));
//set the HBox alignment
hBox.setAlignment(Pos.CENTER);
hBox.getStyleClass().add("hbox");
//create and set up a vbox to include the image, audio controls and the text then set the alignment
final VBox vBox = new VBox(5, Image(), hBox, text1);
vBox.setAlignment(Pos.CENTER);
setCenter(new StackPane(vBox));
} else {
//start an error if service is null
setCenter(new StackPane(new Label("Only for Android")));
}
Services.get(LifecycleService.class).ifPresent(s -> s.addListener(LifecycleEvent.PAUSE, () -> services.Stop()));
}
我也遵循有关创建服务工厂类的建议和来自Audio performance with Javafx for Android (MediaPlayer and NativeAudioService)的接口,取出了添加音频元素,并且如果可能的话,我打算在视图的基础上执行此操作。
答案 0 :(得分:0)
问题解决后必须摆弄并查看Javadocs.Solved通过添加/替换下面的代码来解决。
songURL = new NSURL("file:///" + NSBundle.getMainBundle().findResourcePath(filename, "mp3"));
try {
songURL.checkResourceIsReachable();}
catch(NSErrorException d) {
System.out.println("Song not found!" + d);
}