Error: java.lang.ClassNotFoundException:

in Android 9.0 ， I try to list method of com.yy.leopard.http.AppNetHelper . use cmd string “ndroid hooking watch class_method com.yy.leopard.http.AppNetHelper --dump-args --dump-backtrace --dump-return ”。、
An error occurred。

“- [incoming message] ------------------
{
  "payload": "Attempting to watch class \u001b[32mcom.yy.leopard.http\u001b[39m and method \u001b[32mAppNetHelper\u001b[39m.",
  "type": "send"
}
- [./incoming message] ----------------
(agent) Attempting to watch class com.yy.leopard.http and method AppNetHelper.
A Frida agent exception has occurred.
Error: java.lang.ClassNotFoundException: Didn't find class "com.yy.leopard.http" on path: DexPathList[[dex file "InMemoryDexFile[cookie=[0, 3901508128]]", zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.yobolove.tcyyh2-o7dLH6qNQHSPZEPsZnrPFQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.yobolove.tcyyh2-o7dLH6qNQHSPZEPsZnrPFQ==/lib/arm, /data/app/com.yobolove.tcyyh2-o7dLH6qNQHSPZEPsZnrPFQ==/base.apk!/lib/armeabi-v7a, /system/lib]]
    at frida/node_modules/frida-java-bridge/lib/env.js:126
    at frida/node_modules/frida-java-bridge/lib/class-factory.js:459
    at frida/node_modules/frida-java-bridge/lib/class-factory.js:840
    at frida/node_modules/frida-java-bridge/lib/class-factory.js:128
    at frida/node_modules/frida-java-bridge/lib/class-factory.js:83
    at src/android/hooking.ts:116
    at src/android/lib/libjava.ts:9
    at frida/node_modules/frida-java-bridge/lib/vm.js:11
    at frida/node_modules/frida-java-bridge/index.js:358
”

but 。 use js Scripts 
“ Java.perform(function (){
        Java.enumerateClassLoaders({
            onMatch: function (loader) {
                if (loader.toString().indexOf("zip") > -1) {
                    Java.classFactory.loader = loader;
                    var AppNetHelper = Java.use("com.yy.leopard.http.AppNetHelper");
                    console.log("AppNetHelper.getPlatformInfo:" + AppNetHelper.getPlatformInfo());
                }
            },
            onComplete: function () {
            }
        });
      });”

it can work sucessfully.

Start with src/android/hooking.ts:116 and src/android/lib/libjava.ts:9, then compare the failing class lookup with the Java.enumerateClassLoaders script shown in the issue. Reproduce the class_method command on Android 9.0 and identify why the command cannot resolve the class while the script can; done means the command handles this loader scenario without the reported ClassNotFoundException.