CODEWITHSUNDEEP
androidc++linuxshell
deepz
deepz

Reputation: 71

Running C++ program in android device

I am writing a C++ code to execute 'top' command in android device. This is the code I use.

using namespace std;

int main()
{    
     char buffer[1024];
     string result;
     system("top -n 1 |  head -n 4 | tail -n 3");
     FILE *memcpu= popen("top -n 1 |  head -n 4 | tail -n 3","r");
        while (!feof(memcpu)) {
            if (fgets(buffer, 1024, memcpu) != NULL)
                result+=buffer;
        }
        cout<<"result you need\n"<<result;
}

I want to run this file in adb device. Hence I build the program using command

arm-linux-gnueabi-g++ -static -march=armv7-a name.cpp -o test

When I run the program, the string result is empty.

I tested the program by including system("top -n 1"); line in the program. But I am not getting any output from adb shell (empty string).

I build the same program using g++ and run in linux pc. And at that time I am getting the correct output. What might be the reason that I am not getting desired output in adb shell from android device?

Upvotes: 1

Views: 1165

Answers (1)

deepz
deepz

Reputation: 71

When you build the program using command 

arm-linux-gnueabi-g++ -static -march=armv7-a name.cpp -o test

a static binary is created. In order to link the libraries in android, the program must be built using android ndk build. And that solved the problem for me.

Upvotes: 1

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