how to close activity android using visual studio and xamarin

Question

i have login, register, and home page on my project. I use StartActivity(typeof(Register));to open register page. When user already insert data and click register button, i use StartActivity(typeof(MainActivity)); to go back to login page again. When i click back button on my phone it back to register page>login page>then exit. I want my activity that already created is closed after i open a new page.

And my second question, i have exit button, how to close my app using the exit button?

I'm using Visual Studio 2015 and Xamarin for developing android app.

Answer 1

Calling Finish will close and kill the Activity and it will work as expected. Better way to remove an Avtivity so that it won't appear when Back button is pressed will be to set the NoHistory of that Activity as true.

If you have a LoginActivity and a DashboardActivity and you don't want the LoginActivity to show while pressing back-button after logging in, you can set NoHistory of LoginActivity as true, like below.

[Activity (NoHistory = true)]
public class LoginActivity : Activity
{
}

Answer 2

You can use Finish method to close your current activity:

StartActivity(typeof(MainActivity));
Finish();

To close the app, simply use

System.exit(0);