如何在本地存储DroidScript中存储用户信息

// 存储用户信息
function SaveUserInfo(username, email) {
    app.SetData("username", username);
    app.SetData("email", email);
}

// 获取用户信息
function GetUserInfo() {
    var username = app.GetData("username");
    var email = app.GetData("email");
    return { username: username, email: email };
}

// 示例用法
SaveUserInfo("JohnDoe", "john.doe@example.com");
var userInfo = GetUserInfo();
app.Alert("Username: " + userInfo.username + "\nEmail: " + userInfo.email);

// 存储用户信息到文件
function SaveUserInfoToFile(username, email) {
    var userInfo = { username: username, email: email };
    var json = JSON.stringify(userInfo);
    app.WriteFile("user_info.json", json);
}

// 从文件获取用户信息
function GetUserInfoFromFile() {
    var json = app.ReadFile("user_info.json");
    var userInfo = JSON.parse(json);
    return userInfo;
}

// 示例用法
SaveUserInfoToFile("JohnDoe", "john.doe@example.com");
var userInfo = GetUserInfoFromFile();
app.Alert("Username: " + userInfo.username + "\nEmail: " + userInfo.email);

// 创建或打开数据库
var db = app.OpenDatabase("UserInfoDB");

// 创建表
db.ExecuteSql("CREATE TABLE IF NOT EXISTS Users (username TEXT, email TEXT)");

// 存储用户信息到数据库
function SaveUserInfoToDB(username, email) {
    db.ExecuteSql("INSERT INTO Users (username, email) VALUES (?, ?)", [username, email]);
}

// 从数据库获取用户信息
function GetUserInfoFromDB() {
    var result = db.ExecuteSql("SELECT * FROM Users");
    if (result.length > 0) {
        var userInfo = result[0];
        return { username: userInfo.username, email: userInfo.email };
    } else {
        return null;
    }
}

// 示例用法
SaveUserInfoToDB("JohnDoe", "john.doe@example.com");
var userInfo = GetUserInfoFromDB();
if (userInfo) {
    app.Alert("Username: " + userInfo.username + "\nEmail: " + userInfo.email);
} else {
    app.Alert("No user information found.");
}