Android activity stack question

Question

Possible Duplicate:
Removing an activity from the history stack

I've 1 question for the Android stack and the push stack process as stated below:

A->B->C->C->C->C->D

C will be repeatedly call itself until certain condition met.

i use the code below to start activity.

Intent intent = new Intent(this, MyActivity.class); startActivity(intent);

My problem is after activity D started i want straight away go back to activity B instead of go back activity C when press the back button.

A->B->C->C->C->C->D -----> A->B

I know i should use intent setFlags but i've no idea what to use http://blog.akquinet.de/2010/04/15/android-activites-and-tasks-series-intent-flags/

Any suggestion?

Thanks in advance.

Edited: For this case Activity C is question page and the Activity D is the result page. A->B->Question 1->Question 2-> Question 3 -> Result.

I need to keep the history stack b4 activity D, this will allowed user to change the answer.

score 1 · Answer 1 · answered Feb 28 '11 at 17:23

1

for activity: c: try intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

answered Feb 28 '11 at 17:23

Nissan911

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hi, thanks for your suggestion. I've edited my question. I need to keep the history b4 it reach activity D. – Dylan Feb 28 '11 at 17:37
hi, thanks for your suggestion. I've edited my question. I need to keep the history b4 it reach activity D. – Dylan Feb 28 '11 at 17:37
maybe u can try keep serveal C states into a single activity? – Nissan911 Feb 28 '11 at 22:57

Matthew · Answer 2 · 2011-02-28T17:52:38.727

1

Try Intent.FLAG_ACTIVITY_CLEAR_TOP each time you call startActivity() with the intent for B.

This will bring B to the top, popping all activities that were on top of it.

edited Feb 28 '11 at 17:52

answered Feb 28 '11 at 17:41

Matthew

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I need to set the flag at A->B or B->C? – Dylan Feb 28 '11 at 17:48
i set the Intent.FLAG_ACTIVITY_CLEAR_TOP when activity B start activity C but no luck, when i press back button at activity D i stil go back to activity C. – Dylan Feb 28 '11 at 17:48
set it when you are re-starting B after you've already pushed all your C's. – Matthew Feb 28 '11 at 17:51

score 1 · Answer 3 · edited Mar 01 '11 at 09:06

1

@Override
public void onBackPressed() {
Intent i = new Intent(ACTIVITY_D, ACTIVITY_B);     
    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        
    startActivity(i);
    return;
}

Override the onBackPressed() and set the FLAG_ACTIVITY_CLEAR_TOP flag. Place the function above under your activity D.

edited Mar 01 '11 at 09:06

Yi Jiang

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answered Mar 01 '11 at 03:37

user638711

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Android activity stack question

3 Answers3