https://source.android.com/ 
public interface android.media.midi.MidiManager$OnDeviceOpenedListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.media.midi.MidiManager$OnDeviceOpenedListener
  super_class: java.lang.Object
{
  public abstract void onDeviceOpened(android.media.midi.MidiDevice);
    descriptor: (Landroid/media/midi/MidiDevice;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      device  
}
SourceFile: "MidiManager.java"
NestHost: android.media.midi.MidiManager
InnerClasses:
  public abstract OnDeviceOpenedListener = android.media.midi.MidiManager$OnDeviceOpenedListener of android.media.midi.MidiManager