Unity在Android中使用SQLite数据库

1.下载Sqlite库文件libsqlite3.so、sqlite3.dll，网上找的话到处都是。

2.将已建好的数据库文件放到StreamingAssets下。

 3.在Andorid上运行时，需要将数据库文件复制到另一个位置。这里需要WWW类，务必在协程中调用。

public class DbHelper : MonoSingletion<DbHelper>
{
    private string connectString;

    private SqliteConnection dbconn;
    private SqliteCommand dbcmd;
    private SqliteDataReader reader;

    int roundId=0;//轮号

    private void Start()
    {
#if UNITY_EDITOR
        connectString = "URI=file:" + Path.Combine(Application.streamingAssetsPath, "ShootRecord.db");
#elif UNITY_ANDROID
        StartCoroutine(copyDbFile());
#endif
    }

    IEnumerator copyDbFile()
    {
        string dataSandBoxPath = Application.persistentDataPath + "/ShootRecord.db";
        if (!Directory.Exists(Application.persistentDataPath))
        {
            Directory.CreateDirectory(Application.persistentDataPath);
        }

        WWW loadWWW = new WWW(Path.Combine(Application.streamingAssetsPath, "ShootRecord.db"));
        Debug.Log(Path.Combine(Application.streamingAssetsPath, "ShootRecord.db"));
        yield return loadWWW;
        File.WriteAllBytes(dataSandBoxPath, loadWWW.bytes);
        connectString = "URI=file:" + dataSandBoxPath;
    }

    private void Update()
    {
        if (listScorePoint.Count > 0 && (Time.time - tmLastAdd) > 3.0f)
        {
            ExecuteInsertScorePoint();
        }
    }
    /// <summary>
    /// 关闭连接
    /// </summary>
    public void CloseDB()
    {
        if (reader != null)
        {
            reader.Close();
            reader = null;
        }
        if (dbcmd != null)
        {
            dbcmd.Dispose();
            dbcmd = null;
        }
        if (dbconn != null)
        {
            dbconn.Close();
            dbconn = null;
        }
    }

    public void OpenDB()
    {
        dbconn = new SqliteConnection(connectString);
        dbconn.Open();
    }

    public int NewRound()
    {
        string sql = "INSERT INTO Round(StartDateTime) VALUES(DateTime('now'));SELECT last_insert_rowid();";

        OpenDB();
        int row = 0;
        try
        {
            dbcmd = dbconn.CreateCommand();
            dbcmd.CommandText = sql;
            reader = dbcmd.ExecuteReader();
            if (reader.RecordsAffected == 1)
            {
                row = System.Convert.ToInt32(reader.GetValue(0));
            }
        }
        catch (Exception ex)
        {
            Debug.Log("INSERT INTO Error:" + ex.Message);
        }

        CloseDB();

        roundId = row;
        return row;
    }
}

public class ShootPoint
{
    public float time;
    public bool isShoot;
    public string score;
    public string x;
    public string y;

    public ShootPoint(float tm, bool sht, string sc, string _x, string _y)
    {
        time = tm;
        isShoot = sht;
        score = sc;
        x = _x;
        y = _y;
    }
}