Android 判斷Root的方法

    private final static int kSystemRootStateUnknow = -1;    private final static int kSystemRootStateDisable = 0;    private final static int kSystemRootStateEnable = 1;    private static int systemRootState = kSystemRootStateUnknow;

public static boolean isRootSystem() {if (systemRootState == kSystemRootStateEnable) {return true;} else if (systemRootState == kSystemRootStateDisable) {return false;}File f = null;final String kSuSearchPaths[] = { "/system/bin/", "/system/xbin/","/system/sbin/", "/sbin/", "/vendor/bin/" };try {for (int i = 0; i < kSuSearchPaths.length; i++) {f = new File(kSuSearchPaths[i] + "su");if (f != null && f.exists()) {systemRootState = kSystemRootStateEnable;return true;}}} catch (Exception e) {}systemRootState = kSystemRootStateDisable;return false;}

public synchronized boolean getRootAhth()  {      Process process = null;      DataOutputStream os = null;      try      {          process = Runtime.getRuntime().exec("su");          os = new DataOutputStream(process.getOutputStream());          os.writeBytes("exit\n");          os.flush();          int exitValue = process.waitFor();          if (exitValue == 0)          {              return true;          } else          {              return false;          }      } catch (Exception e)      {          Log.d("*** DEBUG ***", "Unexpected error - Here is what I know: "                  + e.getMessage());          return false;      } finally      {          try          {              if (os != null)              {                  os.close();              }              process.destroy();          } catch (Exception e)          {              e.printStackTrace();          }      }  }  

//判斷機器 Android是否已經root，即是否擷取root許可權     protected static boolean haveRoot()    {      int i = execRootCmdSilent("echo test"); //通過執行測試命令來檢測       if (i != -1)  return true;      retrun false;    }