Password to protect application

Here is the code of Password Activity that store Password in Sqlite , what actually I want when application is open for the first time then MainActivity will open when user save Password then next time whenever the application is open instead of MainActivity, login Activity will open for user login using password that is save last time. thanks in advance.

Password Activity

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace PasswordManager
{
[Activity(Label = "Password")]
public class Password : Activity
{
DataBase db;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Password);
db = new DataBase();
Button btnSave = FindViewById
btnSave.Click += BtnSave_Click;
}
public void PasswordSave()
{
var txtPassword1 = FindViewById(Resource.Id.txtPassword1);
var txtPassword2 = FindViewById(Resource.Id.txtPassword2);
string Pass1 = txtPassword1.Text.ToString();
string pass2 = txtPassword2.Text.ToString();
if (Pass1 == "" && pass2 == "")
{
Toast.MakeText(this, "Empty Fields", ToastLength.Short).Show();
}
else
{
if (Pass1 == pass2)
{
Person person = new Person()
{
password = Pass1,
};
db.insertIntoTable(person);
Toast.MakeText(this, "Password Saved", ToastLength.Short).Show();
}
else
{
Toast.MakeText(this, "Please Enter the Same Password", ToastLength.Short).Show();
}
}
}

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;
namespace PasswordManager
{
[Activity(Label = "Login")]
public class Login : Activity
{
Person p;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Login);
Button btnLogin = (Button)FindViewById(Resource.Id.btnLogin);
btnLogin.Click += BtnLogin_Click;
}
private void BtnLogin_Click(object sender, EventArgs e)
{
var pass = FindViewById(Resource.Id.txtPassword);
string npass = pass.ToString();
p = new Person();
string mypass = p.password;
if (npass == mypass)
{
Toast.MakeText(this, "Password Matched", ToastLength.Long).Show();
StartActivity(typeof(MainActivity));
}
else
{
Toast.MakeText(this, "Password not Matched", ToastLength.Long).Show();
}
}
}
}

3 Replies

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ejaz mirza8y ago
please go through the link u will get what u want

https://forums.xamarin.com/discussion/100238/how-to-maintain-login-logout-sessions-in-xamarin-forms
Hafeez Ali8y ago
Thanks ejaz for your reply. could you please share code for session type variable what you ask or help me to solve this problem by using above code. i am new to xamarin
ejaz mirza8y ago
its long time to android i suggest that use session type variables in android are exist to store the data when ever login it checks that the password if it present it will redirect to the home page other wise it will open the main activity