/*
 * 执行命令
 * @param command
 * 1、获取root权限 "chmod 777 "+getPackageCodePath()
 * 2、关机 reboot -p
 * 3、重启 reboot
 */
public static boolean execCmd(String command) {
 Process process = null;
 DataOutputStream os = null;
 try {
 process = Runtime.getRuntime().exec("su");
 os = new DataOutputStream(process.getOutputStream());
 os.writeBytes(command+"\n");
 os.writeBytes("exit\n");
 os.flush();
 process.waitFor();
 } catch (Exception e) {
  return false;
 } finally {
  try {
  if (os != null) {
   os.close();
  }
  if(process != null) {
   process.destroy();
  }
  } catch (Exception e) {
  e.printStackTrace();
  }
 }
 return true;
}