Question

我的Android项目播放钢琴音乐，所以我将jfugue.jar添加到我的项目中。我的java代码是：

 line no:29    Player player=new Player();
 line no:30    player.play("C D E F G A B");

上面的代码写在按钮onclick监听器中。当我点击button我得到RunTimeEexception时，如下所示：

  02-25 09:20:54.062: W/dalvikvm(846): VFY: unable to find class referenced in signature (Ljavax/sound/midi/Sequencer;)

   02-25 09:20:54.082: I/dalvikvm(846): Could not find method javax.sound.midi.MidiSystem.getSequencer, referenced from method org.jfugue.Player.<init>

   02-25 09:20:54.082: W/dalvikvm(846): VFY: unable to resolve static method 3600: Ljavax/sound/midi/MidiSystem;.getSequencer (Z)Ljavax/sound/midi/Sequencer;

    02-25 09:20:54.082: D/dalvikvm(846): VFY: replacing opcode 0x71 at 0x0011
    02-25 09:20:54.092: W/dalvikvm(846): VFY: unable to find exception handler at addr 0x1c
     02-25 09:20:54.102: W/dalvikvm(846): VFY:  rejected Lorg/jfugue/Player;.<init> (Z)V
    02-25 09:20:54.102: W/dalvikvm(846): Verifier rejected class Lorg/jfugue/Player;

     02-25 09:20:54.122: D/AndroidRuntime(846): Shutting down VM
    02-25 09:20:54.122: W/dalvikvm(846): threadid=1: thread exiting with uncaught exception (group=0x40a70930)

     02-25 09:20:54.152: E/AndroidRuntime(846): FATAL EXCEPTION: main
     02-25 09:20:54.152: E/AndroidRuntime(846): java.lang.VerifyError: org/jfugue/Player
    02-25 09:20:54.152: E/AndroidRuntime(846):  at com.example.xyz.MainActivity$1.onClick(MainActivity.java:29)

Answer 1

我从未使用过jFugue，但看起来你的问题是Android没有实现javax.sound.midi。所以你需要找到/开发这个包的实现。

以下是一些讨论的选项：A simple free MIDI implementation in Java besides javax.sound.midi: Are there any?

Answer 2

你在哪里插入了你的jar文件。另外请检查您是否构建了jar文件。

我无法在eclipse android app中访问库文件JFUGUE.jar

2 个答案: