Android应用程序请求root访问

Process p;try { // Preform su to get root privledges p = Runtime.getRuntime().exec("su"); // Attempt to write a file to a root-only DataOutputStream os = new DataOutputStream(p.getOutputStream()); os.writeBytes("echo /"Do I have root?/" >/system/sd/temporary.txt/n"); // Close the terminal os.writeBytes("exit/n"); os.flush(); try { p.waitFor(); if (p.exitValue() != 255) { // TODO Code to run on success toastMessage("root"); } else { // TODO Code to run on unsuccessful toastMessage("not root"); } } catch (InterruptedException e) { // TODO Code to run in interrupted exception toastMessage("not root"); }} catch (IOException e) { // TODO Code to run in input/output exception toastMessage("not root");}