Clear back navigation stack on activity intent

Question

I have a login view at the start of my application. On logging in this view is finished manually (i.e. finish() is called in the code). This is so that the user doesn't have to press the back button past the login page when they want to exit the app.

Now I want to have a logout button in the app. This calls the login view (with an intent to remove any previously stored login credentials - i.e. simulating a logout).

What I need to do is clear the backwards navigation stack on this intent, or else the user will still be able to press back and view the application as they navigated it originally.

Now, Intent.FLAG_ACTIVITY_CLEAR_TOP doesn't work, I presume because I finish() the Login activity meaning that that activity isn't in the back stack. I am also using Intent.FLAG_ACTIVITY_NEW_TASK which doesn't seem to work either. User's can still press the back button and navigate backwards through activities they should be logged in to access.

So what I need to do is create an instance of the Login activity and make this the new root activity of my application.

How can I do this?

Thanks

Simon · Accepted Answer · 2012-01-29 18:51:13Z

Try

Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP

This is from an app which works fine for me..

homeButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent( _context, MainMenuActivity.class ); intent.setFlags( Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); _context.startActivity( intent ); finish(); overridePendingTransition(R.anim.slide_right,R.anim.slide_right); } });

Booger · Accepted Answer · 2012-01-29 18:48:13Z

You should save the login state to a local data store (you could use SharedPreferences, or an Application class, or a DB).

Then, in your activity's onStart() method, you should check the login state, and display the appropriate UI to the user.

In other words, track the login state somewhere in your app - then check that state every-time the Activity is displayed to determine if the logged in view should be shown.

Regardless of the entry point to the activity, you are in control of what is displayed to the user.

Yeah, this is a good idea. I will look to implement this going forwards. For now, however I will try to get my way to work. :)

Collectives™ on Stack Overflow

Clear back navigation stack on activity intent

2 Answers 2

Comments

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Related