Android check root and enable data

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

 

public class SetMobileDataEnabled {

 

    public String cmdExecSu(String cmd) {

        Process p = null;

        BufferedReader reader = null;

        BufferedWriter writer = null;

        try {

            p = new ProcessBuilder("su").start();

            writer = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));

            InputStream is = p.getInputStream();

            reader = new BufferedReader(new InputStreamReader(is));

            writer.write(cmd);

            writer.write("\n");

            writer.write("exit\n");

            writer.flush();

            StringBuilder sb = new StringBuilder();

            String line;

            while ((line = reader.readLine()) != null) {

                sb.append(line);

            }

            p.waitFor();

            return sb.toString();

        } catch (IOException | InterruptedException e) {

            e.printStackTrace();

        } finally {

            if (reader != null) {

                try {

                    reader.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if (writer != null) {

                try {

                    writer.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if (p != null) {

                p.destroy();

            }

        }

        return null;

    }

 

    public boolean isRoot() {

        String result = cmdExecSu("id");

        return !(result == null || !result.contains("uid=0"));

    }

 

    public void enabled(boolean enable) {

        if (enable) {

            cmdExecSu("svc data enable");

        } else {

            cmdExecSu("svc data disable");

        }

    }

}