统一！ SQLite在Android上不起作用

Question

我花了几个小时使Sqlite在Android上运行，但我仍然不能。在Unity编辑器上，一切正常，但是当我为Android编译时，构建apk，安装apk，则应用程序不起作用。应该从数据库中返回一个值，但是不会发生。

任何帮助都很感谢。

这是我用于与数据库连接的代码。

private void Awake()
    {
        //dbFile = "URI= File:assets/database/wordsdb.sqlite";
        GenerateConnectionString();
    }

private void Connection()
    {
        //connection = new SqliteConnection(dbFile);
        connection = new SqliteConnection(connectionString);
        command = connection.CreateCommand();
        connection.Open();
    }

public void GenerateConnectionString()
    {
        string DatabaseName = "wordsdb.sqlite";

        #if UNITY_EDITOR
        string dbPath = Application.dataPath + "/database/" + DatabaseName;
        Debug.Log("Compilado no unity. " + Application.dataPath);

#else
                        //check if file exists in Application.persistentDataPath
                        string filepath = Application.persistentDataPath + "/" + DatabaseName;

                        if (!File.Exists(filepath) || new System.IO.FileInfo(filepath).Length == 0)
                        {
                            // if it doesn't ->
                            // open StreamingAssets directory and load the db ->
#if UNITY_ANDROID
                                WWW loadDb = new WWW("jar:file://" + Application.dataPath + "!/assets/" + DatabaseName);  // this is the path to your StreamingAssets in android
                                    //WWW loadDb = new WWW("jar:file://" + Application.dataPath + "!/assets/" + DatabaseName);
                                while (!loadDb.isDone) { }  // CAREFUL here, for safety reasons you shouldn't let this while loop unattended, place a timer and error check
                                // then save to Application.persistentDataPath
                                File.WriteAllBytes(filepath, loadDb.bytes);
                                Debug.Log("Compilado no android. " + Application.dataPath);
#elif UNITY_IOS
                                var loadDb = Application.dataPath + "/Raw/" + DatabaseName;  // this is the path to your StreamingAssets in iOS
                                // then save to Application.persistentDataPath
                                File.Copy(loadDb, filepath);
#elif UNITY_WP8
                                var loadDb = Application.dataPath + "/StreamingAssets/" + DatabaseName;  // this is the path to your StreamingAssets in iOS
                                // then save to Application.persistentDataPath
                                File.Copy(loadDb, filepath);
#elif UNITY_WINRT
                                var loadDb = Application.dataPath + "/StreamingAssets/" + DatabaseName;  // this is the path to your StreamingAssets in iOS
                                // then save to Application.persistentDataPath
                                File.Copy(loadDb, filepath);
#endif
                        }
                        var dbPath = filepath;
#endif
        connectionString = "URI=file:" + dbPath;
    }