android - Why does a task still exist after pressing the back button? -

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the android docs say

if user continues press back, each activity in stack popped off reveal previous one, until user returns home screen (or whichever activity running when task began). when activities removed stack, task no longer exists.

well tried on galaxy s4 android 4.3, afterwards when hold home button show tasks task still there (tried settings app, app, internet app, own app). in way not exist?

edit: i'm reading on tasks understand android system. have no specific app development problem.


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