public void onClick(View v) {
    String username=akun.getText().toString();
    String password1=password.getText().toString();

    try{
        if(username.length() > 0 && password1.length() >0)
        {
            Toko dbUser = new Toko();
            dbUser.open();

            if(dbUser.Login(akun, password))
            {
                Toast.makeText(LoginForm.this, "Success !",Toast.LENGTH_LONG).show();
            }
            else
                Toast.makeText(LoginForm.this, "cok !",Toast.LENGTH_LONG).show();
            //dbUser.close();
        }

    }catch(Exception e)
    {
        Toast.makeText(LoginForm.this,"cok ! 2", Toast.LENGTH_LONG).show();
    }
}

public boolean Login(String akun, String password) throws SQLException
{
    Cursor C = db.rawQuery("SELECT * FROM toko WHERE akun=? AND password=?",new String[] {akun, password});
    if (C != null) {
        if(C.getCount() > 0)
        {
            return true;
        }
    }
    return false;
}

if(dbUser.**Login**(akun, password))

public boolean Login(**String akun, String password**) throws SQLException
{
    Cursor C = db.rawQuery("SELECT * FROM toko WHERE akun=? AND password=?",new >String[] {akun, password});
    if (C != null) {
        if(C.getCount() > 0)
        {
            return true;
        }
    }
    return false;
}

if(dbUser.Login(akun, password))

if(dbUser.Login(username, password1))