in this example he is sending string or int from c++ to java i know this but i dont know how to call like this functrion

What do you mean "like this function"?

Hi i have the following problem in my android studio

Root.cpp:
int getRoot(char *argv[])
{
   char ml[64];
   sprintf(ml,"su -c %s",*argv);
   if (getuid() != 0)
   {
       system(ml);
       exit(1);//Exit the process without root
   }
}

Root.h:
int getRoot(char *argv[]);
and now how can i call this method in my native-lib.cpp?
i tried with
extern "C" JNIEXPORT jstring JNICALL
Java_com_example_root_MainActivity_stringFromJNI(
       JNIEnv *env,
       jobject /* this */) {
   getRoot(char *argv[]);
}
but i get error in *argv[]
can someone help me please

Have you initialized a argv[] variable before?

PS:  I was inattentive, I was wrong about initialized argv variable.

Hi i have the following problem in my android studio

Root.cpp:
int getRoot(char *argv[])
{
   char ml[64];
   sprintf(ml,"su -c %s",*argv);
   if (getuid() != 0)
   {
       system(ml);
       exit(1);//Exit the process without root
   }
}

Root.h:
int getRoot(char *argv[]);
and now how can i call this method in my native-lib.cpp?
i tried with
extern "C" JNIEXPORT jstring JNICALL
Java_com_example_root_MainActivity_stringFromJNI(
       JNIEnv *env,
       jobject /* this */) {
   getRoot(char *argv[]);
}
but i get error in *argv[]
can someone help me please

how did i have to install it?

Post you cpp file at pastebin and post here link to you full cpp code, if you can, please.

Post you cpp file at pastebin and post here link to you full cpp code, if you can, please.

root.cpp:
https://pastebin.com/4fVcRu0S
root.h
https://pastebin.com/DcttXids

and now i want to call this method here
native-lib.cpp:
https://pastebin.com/aj7G97pQ

I am not a C programmer, but i think argv variable is not initialized at you native-lib.cpp.

PS: I was inattentive, i was wrong about initialized argv variable.

You can write me a private message.