要在Android Studio中显示Java的字节码，可以使用以下步骤：

1. 在Android Studio中打开要查看字节码的Java文件。

2. 打开“View”菜单，并选择“Tool Windows”下的“Terminal”选项。

3. 在终端窗口中，输入以下命令并按Enter键：

javap -c -s -verbose .java

例如，如果要查看名为"MainActivity.java"的Java文件的字节码，输入以下命令：

javap -c -s -verbose MainActivity.java

4. 终端窗口将显示该Java文件的字节码。您可以查看字节码的详细信息，包括方法、常量池、局部变量等。

这是一个使用Android Studio显示Java字节码的示例：

public class MainActivity {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;
        int c = a + b;
        System.out.println("Sum: " + c);
    }
}

在终端窗口中输入以下命令：

javap -c -s -verbose MainActivity.java

终端窗口将显示以下字节码信息：

Classfile /path/to/MainActivity.class
  Last modified 2021-11-01; size 330 bytes
  MD5 checksum 1c5a2c6a4eef2816bc8f9e3f9d2cbe6a
  Compiled from "MainActivity.java"
public class MainActivity
  minor version: 0
  major version: 52
  flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
   #1 = Methodref          #4.#19         // java/lang/Object."":()V
   #2 = Fieldref           #20.#21        // java/lang/System.out:Ljava/io/PrintStream;
   #3 = Methodref          #22.#23        // java/io/PrintStream.println:(Ljava/lang/String;)V
   #4 = Class              #24            // java/lang/Object
   #5 = Utf8               
   #6 = Utf8               ()V
   #7 = Utf8               Code
   #8 = Utf8               LineNumberTable
   #9 = Utf8               main
  #10 = Utf8               ([Ljava/lang/String;)V
  #11 = Utf8               SourceFile
  #12 = Utf8               MainActivity.java
  #13 = Utf8               StackMapTable
  #14 = Class              #25            // java/lang/System
  #15 = Utf8               out
  #16 = NameAndType        #26:#27        // println:(Ljava/lang/String;)V
  #17 = Utf8               Sum:
  #18 = Methodref          #28.#29        // java/lang/String.valueOf:(I)Ljava/lang/String;
  #19 = NameAndType        #5:#6          // "":()V
  #20 = Class              #30            // java/lang/System
  #21 = NameAndType        #15:#31        // out:Ljava/io/PrintStream;
  #22 = Class              #32            // java/io/PrintStream
  #23 = NameAndType        #16:#33        // println:(Ljava/lang/String;)V
  #24 = Utf8               java/lang/Object
  #25 = Utf8               java/lang/System
  #26 = Utf8               println
  #27 = Utf8               (Ljava/lang/String;)V
  #28 = Class              #34            // java/lang/String
  #29 = NameAndType        #35:#36        // valueOf:(I)Ljava/lang/String;
  #30 = Utf8               java/lang/System
  #31 = Utf8               Ljava/io/PrintStream;
  #32 = Utf8               java/io/PrintStream
  #33 = Utf8               (Ljava/lang/String;)V
  #34 = Utf8               java/lang/String
  #35 = Utf8               valueOf
  #36 = Utf8               (I)Ljava/lang/String;
{
  public MainActivity();
    descriptor: ()V
    flags: ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #1                  // Method java/lang/Object."":()V
         4: return
      LineNumberTable:
        line