Java Question [Java] No suitable driver found for jdbc:sqlite

I'm building this library, but it generates an error, tells me that the drivers are missing and therefore the connection does not open because of null value.
Something is missing.

Public Sub Update(filenameDB As String, TableName As String,ID As Int, Field As String, fn as string)
    Dim J As JavaObject = Me
    J.RunMethod("SetDB",Array As String(filenameDB))
    J.RunMethod("update",Array As Object(TableName,Field,ID,fn))
End Sub
#if Java
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import anywheresoftware.b4a.BA.Permissions;
@Permissions(values={"android.permission.WRITE_EXTERNAL_STORAGE"})
 String url = "jdbc:sqlite:C://sqlite/db/test.db";
 public void SetDB(String filename) {
     url = "jdbc:sqlite:" + filename;
     BA.Log(url);
 public Connection connect() {
        // SQLite connection string
        Connection conn = null;
        try {
            conn = DriverManager.getConnection(url); ' FIRST ERROR ---------------
        } catch (SQLException e) {
            System.out.println(e.getMessage());
            BA.Log("Errore: " + e.getMessage());
        return conn;
 public void update(String tablename, String fieldname, int materialId, String filename) {
        // update sql
        String updateSQL = "UPDATE " + tablename
                + " SET "+ fieldname + " = ? "
                + "WHERE ID= ?";
        try {
            BA.Log("1");
            Connection conn = connect();
            BA.Log("2: " + updateSQL);
            PreparedStatement pstmt = conn.prepareStatement(updateSQL);
           // -----------------     HERE: Crash - Conn is nul --------------------
            // set parameters
        } catch (SQLException e) {
            System.out.println(e.getMessage());
#End If

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
jdbc:sqlite:/storage/emulated/0/test.sql
Error: No suitable driver found for jdbc:sqlite:/storage/emulated/0/test.sql
2: UPDATE mytable SET bitmap = ? WHERE ID= ?
sqlite_updatebitmap (B4A line: 15)
J.RunMethod("updatePicture",Array As Object(Table
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:131)
at b4a.example.sqlite._updatebitmap(sqlite.java:161)
at b4a.example.main._buttonsave1_click(main.java:482)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:6199)
at android.widget.TextView.performClick(TextView.java:11090)
at android.view.View$PerformClick.run(View.java:23647)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'java.sql.PreparedStatement java.sql.Connection.prepareStatement(java.lang.String)' on a null object reference
at b4a.example.sqlite.updatePicture(sqlite.java:228)
... 19 more P.S. I know you can avoid the LoadBitmap and SaveBitmap to pass images in byte arrays, I'll optimize the code later, now I'm trying to make it work

Thanks, but I had already seen and does not solve the problem, but it generates me another mistake.
Exception.getMessage() = com.mysql.jdbc.Driver
Rather it seems that I should add jar package