Frida android native hooking

hookNativeFunc.js

// Android native hooks By @709924470
// CC-BY-NC 4.0 
var moduleName = "libmain.so"; // Module name gose here
var hookFunctions = [
    {
        name: "Java_com_example_hellojni_getstr", // Function name goes here
        onEnter: function(args){
            // TODO: your code here
        },
        onLeave: function(ret){
            // TODO: your code here
        }
    },
];
Interceptor.attach(Module.findExportByName(null, "android_dlopen_ext"), {
    onEnter: function (args) {
        var path = Memory.readUtf8String(args[0]);
        //console.log("[*] android_dlopen_ext(\" " + path +" \")");
        hookNative(path);
    }
});
Interceptor.attach(Module.findExportByName(null, "dlopen"), {
    onEnter: function (args) {
        var path = Memory.readUtf8String(args[0]);
        //console.log("[*] dlopen(\" " + path +" \")");
        hookNative(path);
    }
});
function hookNative(path){
    if(path.indexOf(moduleName) != -1){
        // TODO: actions after module loaded goes here
        for(var i = 0; i < hookFunctions.length; i++){
            Interceptor.attach(Module.findExportByName(moduleName, hookFunctions[i].name),{
                onEnter: hookFunctions[i].onEnter,
                onLeave: hookFunctions[i].onLeave
            });
        }
    }
}