https://source.android.com/ 
public interface android.hardware.Camera$PreviewCallback
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.hardware.Camera$PreviewCallback
  super_class: java.lang.Object
{
  public abstract void onPreviewFrame(byte[], android.hardware.Camera);
    descriptor: ([BLandroid/hardware/Camera;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      data    
      camera  
}
SourceFile: "Camera.java"
NestHost: android.hardware.Camera
InnerClasses:
  public abstract PreviewCallback = android.hardware.Camera$PreviewCallback of android.hardware.Camera
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()