Android – in the signed APK, butterknife does not work

I created an application with butter knife to implement onclick, ontouch and other functions. When I test it on Android device, it can work well; When I install debug APK on my Android device, it also works well. However, when I generate a signed APK and try to run it on my Android device, "onclick" and "ontouch" don't work properly. I generated APK using Android studio. Does anyone know the reason for this?

resolvent:

from http://jakewharton.github.io/butterknife/ Copy the rules used in the proguard-rules.pro file

-keep class butterknife.** { *; }
-dontwarn butterknife.internal.**
-keep class **$$ViewBinder { *; }

-keepclasseswithmembernames class * {
  @butterknife.* <fields>;
}

-keepclasseswithmembernames class * {
   @butterknife.* <methods>;
}