[英]Why isn't SoundFile.play not working processing 4
So I'm trying to play a simple sound file and it's not working.所以我试图播放一个简单的声音文件,但它不工作。 The specific code is
具体代码是
if(key == 'r' || key == 'R') {
file = new SoundFile(this, "track1.wav");
file.play();
}
if(key == 't' || key == 'T') {
file = new SoundFile(this, "track2.wav");
file.play();
}
if(key == 'y' || key == 'Y') {
file = new SoundFile(this, "track3.wav");
file.play();
}
It gives me this error它给了我这个错误
javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian not supported.
at java.desktop/com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(DirectAudioDevice.java:484)
at java.desktop/com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:115)
at com.jsyn.devices.javasound.JavaSoundAudioDevice$JavaSoundInputStream.start(Unknown Source)
at com.jsyn.engine.SynthesisEngine$EngineThread.run(Unknown Source)
java.lang.NullPointerException: Cannot invoke "javax.sound.sampled.TargetDataLine.read(byte[], int, int)" because "this.line" is null
at com.jsyn.devices.javasound.JavaSoundAudioDevice$JavaSoundInputStream.read(Unknown Source)
at com.jsyn.devices.javasound.JavaSoundAudioDevice$JavaSoundInputStream.read(Unknown Source)
at com.jsyn.engine.SynthesisEngine$EngineThread.run(Unknown Source)
java.lang.RuntimeException: AudioInput stop attempted when no line created.
at com.jsyn.devices.javasound.JavaSoundAudioDevice$JavaSoundInputStream.stop(Unknown Source)
at com.jsyn.engine.SynthesisEngine$EngineThread.run(Unknown Source)
i suggest to add this sound files under res folder.我建议将这个声音文件添加到 res 文件夹下。 in my project, I created folder named "raw" under "res folde" with these files in it, sound.mp3 and for playing it, i used this
在我的项目中,我在“res folde”下创建了名为“raw”的文件夹,其中包含这些文件,sound.mp3,为了播放它,我使用了这个
mediaPlayer = MediaPlayer.create(SCREEN_NAME.this,R.track1);
mediaPlayer.start();
edit: and i created this variable编辑:我创建了这个变量
private MediaPlayer mediaPlayer;
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