Can I use this library to handle GPIO pins of Qualcom MSM8909 board running simple android OS??

[MirzaAhmedBaig]

I am trying to read and write to GPO pins of Qualcome MSM8909 running Simple android OS not Android things. I am able to do the same with adb but when i am trying to do same with android App its giving me permission denied error. So I can only able to read these pins but cant able to write anything to it.
Please Help.
This is what I have tried
var outp = exe?.Executer("echo 0 > /sys/class/gpio/gpio942/value")
Log.d("Output", "My INPUT $outp")

        outp = exe?.Executer("cat /sys/class/gpio/gpio942/value")
        Log.d("Output", "My OUTPUT $outp")

//

public class ShellExecuter {

public ShellExecuter() {

}

public String Executer(String command) {

    StringBuffer output = new StringBuffer();

    Process p;
    try {
        p = Runtime.getRuntime().exec(command);
        p.waitFor();
        BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

        String line = "";
        while ((line = reader.readLine())!= null) {
            output.append(line + "\n");
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    String response = output.toString();
    return response;

}

}