Android App请求获取Root权限

        Process process = null;
        DataOutputStream os = null;
        try {
            String cmd = "chmod 777 " + getPackageCodePath();
            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) {
            }
        }

来源：http://www.cnblogs.com/xiangism/archive/2012/07/20/2601127.html