SQLite Xamarin.Forms PCL errors on Android

Question

I am trying to build an sqlite database on xamarin(C#) in pcl project. I am following this tutorial. On the Android Implementation (Step5) i get these errors:

Error CS0104 'Environment' is an ambiguous reference between 'Android.OS.Environment' and 'System.Environment' AlarmSQLite.Android c:\\users\\thomas\\source\\repos\\AlarmSQLite\\AlarmSQLite\\AlarmSQLite.Android\\SQLite_Android.cs 30 Active

Error CS0234 The type or namespace name 'Net' does not exist in the namespace 'SQLite' (are you missing an assembly reference?) AlarmSQLite.Android c:\\users\\thomas\\source\\repos\\AlarmSQLite\\AlarmSQLite\\AlarmSQLite.Android\\SQLite_Android.cs 33 Active

I use VisualStudio2017. I tried to remove .Net and added System.Environment but i get more and new errors. My code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using SQLite;
using Xamarin.Forms;
using AlarmSQLite.Droid;
using System.IO;

[assembly: Dependency(typeof(SQLite_Android))]

namespace AlarmSQLite.Droid
{
public class SQLite_Android : ISQLite
{
    public SQLite_Android() { }



    public SQLite.SQLiteConnection GetConnection()
    {
        var dbName = "AlarmDB.db3";
        var documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
        var path = Path.Combine(documentsPath, dbName);

        var platform = new SQLite.Net.Platform.XamarinAndroid.SQLitePlatformAndroid();
        var connection = new SQLite.Net.SQLiteConnection(platform, path);

        return connection;
    }

}
}

Everything is the same with the tutorial. What am i doing wrong? Thank you!

New Errors:

Error CS0234 The type or namespace name 'Platform' does not exist in the namespace 'SQLite' (are you missing an assembly reference?) AlarmSQLite.Android C:\\Users\\Thomas\\source\\repos\\AlarmSQLite\\AlarmSQLite\\AlarmSQLite.Android\\SQLite_Android.cs 33 Active

Error CS0029 Cannot implicitly convert type 'SQLite.Net.SQLiteConnection' to 'SQLite.SQLiteConnection' AlarmSQLite.Android C:\\Users\\Thomas\\source\\repos\\AlarmSQLite\\AlarmSQLite\\AlarmSQLite.Android\\SQLite_Android.cs 36 Active

Answer 1

Error CS0104: Environment comes from 'Android.OS.Environment' as well as 'System.Environment' so giving you and ambiguity issue. Just Prepend System to the Environment.

var documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);

Error CS0234: Seems like you haven't added SQLite-Async Nuget Package. You have to add this in your PCL as well as in Android project and build project again.

Error CS0234 & CS0029: Make sure you added following two nuget packages in android and pcl projects.

Then, instead of using Sqlite, try to use Sqlite.Net.

Your Final Code should Look :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Xamarin.Forms;
using AlarmSQLite.Droid;
using System.IO;
using SQLite.Net;
using SQLite.Net.Async;

[assembly: Dependency(typeof(SQLite_Android))]

namespace AlarmSQLite.Droid
{
public class SQLite_Android : ISQLite
{
    public SQLite_Android() { }



    public SQLiteConnection GetConnection()
    {
        var dbName = "AlarmDB.db3";
        var documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        var path = Path.Combine(documentsPath, dbName);

        var platform = new SQLite.Net.Platform.XamarinAndroid.SQLitePlatformAndroid();
        var connection = new SQLiteConnection(platform, path);

        return connection;
    }

}
}

Do not forget to adjust your interface for the same. It should be like:

SQLiteConnection GetConnection():

Note : You can omit Sqlite.Net.Async PCL reference if you don't need it.