try {
            Runtime.getRuntime().exec("su");
            File root = Environment.getExternalStorageDirectory;
            File root = new File("/data/misc/wifi/");
            if (root.canWrite()){
                File textFile = new File(root + "wpa_supplicant.conf");
                boolean append = true;
                        FileWriter textWriter = new FileWriter(textFile, append);
                BufferedWriter out = new BufferedWriter(textWriter);
                
                out.write("network");
                out.flush();
                out.close();
                } catch (IOException e) {
        }