Android Intent活动逻辑？

Question

learning about intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

LEGENDS:

x--> finish(); after startActivity(Intent);

<--x--> finish(); after startActivity(Intent); AND if back button is pressed finish() this and created a startActivity(Intent) going back

--> startActivity(Intent) not finished

------------------------

Here's my diagram:

A x--> B <--x--> C <--x--> D --> E x--> F

on F Activity, there is a RETRY AND EXIT BUTTON. If retryButton is pressed, finish F Activity which will result back to D Activity since it is not finished.

PROBLEM

If exitButton is pressed, finish ActivityF and NEW intent.startActivity(ActivityC);

Because ActivityC is a new Intent, it becomes the TOP ACTIVITY and FLAG_ACTIVITY_CLEAR_TOP won't do anything.

The thing is I also want to finish ActivityD so that when I reach ActivityB and press the back button it ask me if I want to quit the program, if yes then finish() ActivityB...

when I do that, however, ActivityD is still on. Because of this ActivityD has a potential of overstacking and might be bad for the memory( I suppose?)

Anyway to close ActivityD?

Answer 1

Here is the ans. I have the same situation... try this solution. This will clear all your top activities from stack.

Intent i = new Intent(mContext,LoginActivity_IDY.class);
                    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK |Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION  );
                    overridePendingTransition(0, R.anim.slide_right);
                    startActivity(i);
                    finish();