Removing an activity from the history stack

Question

My app shows a signup activity the first time the user runs the app  looks like    ActivitySplashScreen  welcome to game  sign up for an account   ActivitySplashScreenSignUp  great  fill in this info  ActivityGameMain  main game screen    so the activities launch each other in exactly that order  when the user clicks through a button on each screen   When the user goes from activity  2 to  3  is it possible to wipe  1 and  2 off the history stack completely  I d like it so that if the user is at  3  and hits the back button  they just go to the homescreen  instead of back to the splash screen   I think I can accomplish this with tasks  ie  start a new task on  3  but wanted to see if there was simpler method   Thanks

User · Answer

One way that works pre API 11 is to start ActivityGameMain first, then in the onCreate of that Activity start your ActivitySplashScreen activity. The ActivityGameMain won't appear as you call startActivity too soon for the splash.

Then you can clear the stack when starting ActivityGameMain by setting these flags on the Intent:

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);

You also must add this to ActivitySplashScreen:

@Override
public void onBackPressed() {
    moveTaskToBack(true);
}

So that pressing back on that activity doesn't go back to your ActivityGameMain.

I assume you don't want the splash screen to be gone back to either, to achieve this I suggest setting it to noHistory in your AndroidManifest.xml. Then put the goBackPressed code in your ActivitySplashScreenSignUp class instead.

However I have found a few ways to break this. Start another app from a notification while ActivitySplashScreenSignUp is shown and the back history is not reset.

The only real way around this is in API 11:

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);

User · Answer

It is crazy that no one has mentioned this elegant solution  This should be the accepted answer    SplashActivity - gt  AuthActivity - gt  DashActivity   if   sessionManager isLoggedIn          Intent intent   new Intent context  AuthActivity class       intent setFlags Intent FLAG ACTIVITY NO HISTORY       context startActivity intent       finish      else      Intent intent   new Intent context  DashActivity class      context startActivity intent       finish        The key here is to use intent setFlags Intent FLAG ACTIVITY NO HISTORY    for the intermediary Activity  Once that middle link is broken  the DashActivity will the first and last in the stack    android noHistory  true  is a bad solution  as it causes problems when relying on the Activity as a callback e g onActivityResult  This is the recommended solution and should be accepted

User · Answer

You can achieve this by setting the android noHistory attribute to  true  in the relevant  lt activity gt  entries in your AndroidManifest xml file  For example    lt activity     android name   AnyActivity      android noHistory  true    gt

User · Answer

Removing a activity from a History is done By setting the flag before the activity You Don t want   A- B- C- D  Suppose A B C and D are 4 Activities if you want to clear B and C then   set flag  intent setFlags Intent FLAG ACTIVITY NO HISTORY     In the activity A and B   Here is the code bit   Intent intent   new Intent this Activity B class   intent setFlags Intent FLAG ACTIVITY NO HISTORY   startActivity intent

User · Answer

if Build VERSION SDK INT  gt   Build VERSION CODES LOLLIPOP                super finishAndRemoveTask                      else               super finish

User · Answer

I know I m late on this  it s been two years since the question was asked  but I accomplished this by intercepting the back button press  Rather than checking for specific activities  I just look at the count and if it s less than 3 it simply sends the app to the back  pausing the app and returning the user to whatever was running before launch   I check for less than three because I only have one intro screen  Also  I check the count because my app allows the user to navigate back to the home screen through the menu  so this allows them to back up through other screens like normal if there are activities other than the intro screen on the stack     We want the home screen to behave like the bottom of the activity stack so we do not return to the initial screen   unless the application has been killed  Users can toggle the session mode with a menu item at all other times   Override public void onBackPressed           Check the activity stack and see if it s more than two deep  initial screen and home screen        If it s more than two deep  then let the app proccess the press     ActivityManager am    ActivityManager this getSystemService Activity ACTIVITY SERVICE       List lt RunningTaskInfo gt  tasks   am getRunningTasks 3     3 because we have to give it something  This is an arbitrary number     int activityCount   tasks get 0  numActivities       if  activityCount  lt  3                moveTaskToBack true             else               super onBackPressed

User · Answer

I use this way   Intent i   new Intent MyOldActivity this  MyNewActivity class   i setFlags Intent FLAG ACTIVITY NEW TASK   Intent FLAG ACTIVITY CLEAR TASK  startActivity i

User · Answer

Try this   intent addFlags Intent FLAG ACTIVITY LAUNCHED FROM HISTORY   it is API Level 1  check the link

User · Answer

It s too late but hope it helps  Most of the answers are not pointing into the right direction  There are two simple flags for such thing   intent setFlags Intent FLAG ACTIVITY NEW TASK   Intent FLAG ACTIVITY CLEAR TASK     From Android docs      public static final int FLAG ACTIVITY CLEAR TASK       Added in API level 11  If set in an Intent passed to Context startActivity    this flag will cause any existing task that would be associated with the       activity to be cleared before the activity is started  That is  the   activity becomes the new root of an otherwise empty task  and any old   activities are finished  This can only be used in conjunction with   FLAG ACTIVITY NEW TASK

User · Answer

This is likely not the ideal way to do it  If someone has a better way  I will be looking forward to implementing it  Here s how I accomplished this specific task with pre-version-11 sdk   in each class you want to go away when it s clear time  you need to do this           interesting code stuff         Intent i   new Intent MyActivityThatNeedsToGo this  NextActivity class       startActivityForResult i  0       Override protected void onActivityResult int requestCode  int resultCode  Intent data        super onActivityResult requestCode  resultCode  data       if  resultCode    R string unwind stack result id            this setResult R string unwind stack result id           this finish              then the one that needs to set off the chain of pops from the stack needs to just call this when you want to initiate it   NextActivity this setResult R string unwind stack result id   NextActivity this finish      Then the activities aren t on the stack  Remember folks  that you can start an activity  and then begin cleaning up behind it  execution does not follow a single  the ui  thread

User · Answer

Just set noHistory  true  in Manifest file  It makes activity being removed from the backstack

User · Answer

Just call this finish   before startActivity intent  like this-         Intent intent   new Intent ActivityOne this  ActivityTwo class           this finish            startActivity intent

User · Answer

In the manifest you can add   android noHistory  true    lt activity android name   ActivityName  android noHistory  true    gt    You can also call  finish     immediately after calling startActivity

User · Answer

You can use forwarding to remove the previous activity from the activity stack while launching the next one   There s an example of this in the APIDemos  but basically all you re doing is calling finish   immediately after calling startActivity

User · Answer

Yes  have a look at Intent FLAG ACTIVITY NO HISTORY

[android] Removing an activity from the history stack

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