android 使用系统级别权限

java.lang.SecurityException: Neither user 10027 nor current process has android.permission.MODIFY_PHONE_STATE

 1、root手机，奇兔刷机助手

2、将app拷贝至/system/priv-app目录下

3、重启手机

附：

/**
 * 应用程序运行命令获取 Root权限，设备必须已破解(获得ROOT权限)
 *
 * @return 应用程序是/否获取Root权限
 */
public static boolean upgradeRootPermission(String pkgCodePath) {
  Process process = null;
  DataOutputStream os = null;
  try {
    String cmd = "chmod 777 " + pkgCodePath;
    process = Runtime.getRuntime().exec("su"); //切换到root帐号
    os = new DataOutputStream(process.getOutputStream());
    os.writeBytes(cmd + "\n");
    os.writeBytes("exit\n");
    os.flush();
    process.waitFor();
  } catch (Exception e) {
    return false;
  } finally {
    try {
      if (os != null) {
        os.close();
      }
      process.destroy();
    } catch (Exception e) {
    }
  }
  return true;
}

原文：http://www.cnblogs.com/agilezhu/p/6015403.html