the class is not find after asm modify class

[Poney1]

我这边订阅了 android开发高手课， 然后 在练习demo时 使用了asm 修改了类，都达到了目的，但是运行的时候报以下这个错误，老师能否指导一下，
Process: xp.com.myapplication4, PID: 24629
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{xp.com.myapplication4/xp.com.myapplication4.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "xp.com.myapplication4.MainActivity" on path: DexPathList[[zip file "/data/app/xp.com.myapplication4-XALL7UBA17oDaPjNH7766Q==/base.apk"],nativeLibraryDirectories=[/data/app/xp.com.myapplication4-XALL7UBA17oDaPjNH7766Q==/lib/arm64, /system/lib64, /vendor/lib64]]