Android kill all other activities on starting a new one

Question

I have an android activity problem.

Here is how my process works:

1. Login Activity starts
2. Login successful. MainMenuActivity starts and LoginActivity is finished by me.
3. User touched on settings and SettingsActivity starts. MainMenuActivity is NOT finished. because is it the main menu. when user presses the back on settings screen I need to go back MainMenuActivity. so I cant kill MainMenu.
4. User touched on log out and SettingsActivity is finished by me and Login activity starts. As user returns the login I need to kill MainMenuActivity but I cant.:/
5. I tried FLAG_ACTIVITY_SINGLE_TOP, CLEAR_TOP, SINGLE_TASK, NEW_TASK, NO_HISTORY etc.. almost all of them didnt work
6. I put launchMode="singleTask", clearTaskOnLaunh="true" etc. didtn work again.
7. I tried addFlags() and setFlags() both, didnt work
8. There are some many issues about this topic here, I read and applied all the suggested solutions and didnt work.

Can anyone help, please?

P.S android:minSdkVersion="8" and android:targetSdkVersion="15" for my app. I didnt use fragments in the app, I use old activity structure.

Sammie

please use NO_HISTORY and manually do the backpress by overiding onBackpress meathod..I think that will solve your problem – Langsyne

Answer 1

Use the combination of two flags like this:

Intent intent = new Intent(this, Login.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(intent);
        finish();

This deletes all the other activities and starts this one.

Try this.

For api level <11

i.addFlag(Intent.FLAG_ACTIVITY_NO_HISTORY | 
              Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);

Tradesfolk

actually it seems there is no flag as Intent.FLAG_ACTIVITY_CLEAR_TASK maybe you meant this :Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET? – Sammie

this is available from API level 11 – Tradesfolk

#11098779 – Tradesfolk

OP says minSdkVersion="8" in his post. He can't use Intent.FLAG_ACTIVITY_CLEAR_TASK. You need to read the question before you answer it. – Marieann

My mistake. But the link I posted gives an alternave to this flag – Tradesfolk

Answer 2

I'd suggest to start the settings activity for result (see here), and when the user requests to logout, set a result accordingly. You will get this result in MainActivity's onActivityResult (see here) and can handle the logout there, finishing the mainActivity before starting the loginActivity.

Swallowtailed

your solution seems reasonable, this will work definetely. only more rows then settings a flag, thanks. probably I use this. I appreicate – Sammie

this works fine. very thank you. but I hope I can learn how to do it with flags some day. – Sammie

Answer 3

I suggest that you don't finish the Login activity when you start the main menu. Then you can always clear all activities on logout by doing this:

    Intent intent = new Intent(this, Login.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(intent);

This will only work if Login activity is still active at the root (beginning) of the task stack.

To prevent the user from BACKing into the Login activity from the Main activity, you can override onBackPressed() in Main activity and do something else.

Marieann

Answer 4

Use FLAG_ACTIVITY_CLEAR_TOP like this-

Intent loginIntent = new Intent(this, Login.class);
        loginIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(loginIntent);
    finish();

Equation

I already tried this, but I also tried one more time after you wrote but it did not work. thanks. – Sammie

Intent i = new Intent(SettingsActivity.this, StartupActivity.class); i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(i); finish(); – Sammie

This doesn't work because the Login activity is not in the task stack. He has already finished it. This would work if the Login activity were still at the root of the task stack. – Marieann

Answer 5

Intent intent = new Intent(MainActivity.this, MyActivity2.class);
                    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                    | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                    startActivity(intent);
                    finish();

1. in this example Mainactivity automatically closed and Myactivity2 Start. and one thing you need to add finish();

Baileybailie