https://source.android.com/ 
class android.media.ClosedCaptionWidget$1 extends android.view.accessibility.CaptioningManager$CaptioningChangeListener
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: android.media.ClosedCaptionWidget$1
  super_class: android.view.accessibility.CaptioningManager$CaptioningChangeListener
{
  final android.media.ClosedCaptionWidget this$0;
    descriptor: Landroid/media/ClosedCaptionWidget;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(android.media.ClosedCaptionWidget);
    descriptor: (Landroid/media/ClosedCaptionWidget;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // android.media.ClosedCaptionWidget$1 this
         0: .line 224
            aload 0 /* this */
            aload 1
            putfield android.media.ClosedCaptionWidget$1.this$0:Landroid/media/ClosedCaptionWidget;
            aload 0 /* this */
            invokespecial android.view.accessibility.CaptioningManager$CaptioningChangeListener.<init>:()V
            return
        end local 0 // android.media.ClosedCaptionWidget$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Landroid/media/ClosedCaptionWidget$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public void onUserStyleChanged(android.view.accessibility.CaptioningManager$CaptionStyle);
    descriptor: (Landroid/view/accessibility/CaptioningManager$CaptionStyle;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // android.media.ClosedCaptionWidget$1 this
        start local 1 // android.view.accessibility.CaptioningManager$CaptionStyle userStyle
         0: .line 227
            aload 0 /* this */
            getfield android.media.ClosedCaptionWidget$1.this$0:Landroid/media/ClosedCaptionWidget;
            getstatic android.media.ClosedCaptionWidget.DEFAULT_CAPTION_STYLE:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            aload 1 /* userStyle */
            invokevirtual android.view.accessibility.CaptioningManager$CaptionStyle.applyStyle:(Landroid/view/accessibility/CaptioningManager$CaptionStyle;)Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            putfield android.media.ClosedCaptionWidget.mCaptionStyle:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
         1: .line 228
            aload 0 /* this */
            getfield android.media.ClosedCaptionWidget$1.this$0:Landroid/media/ClosedCaptionWidget;
            getfield android.media.ClosedCaptionWidget.mClosedCaptionLayout:Landroid/media/ClosedCaptionWidget$ClosedCaptionLayout;
            aload 0 /* this */
            getfield android.media.ClosedCaptionWidget$1.this$0:Landroid/media/ClosedCaptionWidget;
            getfield android.media.ClosedCaptionWidget.mCaptionStyle:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            invokeinterface android.media.ClosedCaptionWidget$ClosedCaptionLayout.setCaptionStyle:(Landroid/view/accessibility/CaptioningManager$CaptionStyle;)V
         2: .line 229
            return
        end local 1 // android.view.accessibility.CaptioningManager$CaptionStyle userStyle
        end local 0 // android.media.ClosedCaptionWidget$1 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0       this  Landroid/media/ClosedCaptionWidget$1;
            0    3     1  userStyle  Landroid/view/accessibility/CaptioningManager$CaptionStyle;
    MethodParameters:
           Name  Flags
      userStyle  

  public void onFontScaleChanged(float);
    descriptor: (F)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // android.media.ClosedCaptionWidget$1 this
        start local 1 // float fontScale
         0: .line 233
            aload 0 /* this */
            getfield android.media.ClosedCaptionWidget$1.this$0:Landroid/media/ClosedCaptionWidget;
            getfield android.media.ClosedCaptionWidget.mClosedCaptionLayout:Landroid/media/ClosedCaptionWidget$ClosedCaptionLayout;
            fload 1 /* fontScale */
            invokeinterface android.media.ClosedCaptionWidget$ClosedCaptionLayout.setFontScale:(F)V
         1: .line 234
            return
        end local 1 // float fontScale
        end local 0 // android.media.ClosedCaptionWidget$1 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Landroid/media/ClosedCaptionWidget$1;
            0    2     1  fontScale  F
    MethodParameters:
           Name  Flags
      fontScale  
}
SourceFile: "ClosedCaptionRenderer.java"
EnclosingMethod: android.media.ClosedCaptionWidget
NestHost: android.media.ClosedCaptionWidget
InnerClasses:
  android.media.ClosedCaptionWidget$1
  abstract ClosedCaptionLayout = android.media.ClosedCaptionWidget$ClosedCaptionLayout of android.media.ClosedCaptionWidget
  public final CaptionStyle = android.view.accessibility.CaptioningManager$CaptionStyle of android.view.accessibility.CaptioningManager
  public abstract CaptioningChangeListener = android.view.accessibility.CaptioningManager$CaptioningChangeListener of android.view.accessibility.CaptioningManager