Android 带着用户名的SharedPreferences

  /**
     * 设置当前用户的签到信息
     * account&info;account&info
     *
     * @param context
     * @param sign
     * @author jrjin
     * @time 2016-1-5 下午2:27:47
     */
    public static void setSignInfo(Context context, String sign) {
        String account = getAccount(context);
        if (TextUtils.isEmpty(account)) return;
        String signs = getSigninfos(context);
        if (TextUtils.isEmpty(signs)) {
            signs = account + "&" + sign;
        } else {
            StringBuilder builder = new StringBuilder();
            String[] modules = signs.split(";");
            String[] time = null;
            boolean added = false;
            for (String module : modules) {
                time = module.split("&");
                if (time[0].equals(account)) {
                    builder.append(account + "&" + sign + ";");
                    added = true;
                } else {
                    // 直接添加
                    builder.append(module + ";");
                }
            }
            if (!added) {
                builder.append(account + "&" + sign + ";");
            }
            // 去除最后一个";"
            signs = builder.toString();
            signs = signs.substring(0, signs.length() - 1);
        }

        SharedPreferences sp = context.getSharedPreferences(
                SETTING_PREFERENCES, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.putString(PREFERENCE_KEY_SIGN_INFO, signs);
        editor.commit();
    }

    private static String getSigninfos(Context context) {
        SharedPreferences sp = context.getSharedPreferences(
                SETTING_PREFERENCES, Context.MODE_PRIVATE);
        String signs = sp.getString(PREFERENCE_KEY_SIGN_INFO, "");
        return signs;
    }