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Thread: Back button "closes" programs?

  1. Droid
    dnvnk's Avatar
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    #1

    Back button "closes" programs?

    at this website, the author quotes the following:
    "
    BACK versus HOME

    I would like to highlight one other key area that can be confusing at first; the difference between the HOME button and the BACK button. At any point, when you are running an application you can return to your home screen by simply pressing the HOME button. When you press the HOME button, understand that the application you were in does not “close” or “shutdown” like some other smart phones. The application is still running in the background. If you were to click that applications icon again, it would re-open and you would be presented the last screen you were on when you pressed the HOME button. For example, let’s say you were in the Browser application and you were checking the scores of your favorite team. You decided to do something else, so you pressed the HOME button and went to the home screen where you changed your music. Then you go back into the Browser and you’ll have the same website with the scores for your team right there. Think of it like minimizing a program on your desktop computer. It’s not closed, just out of the way for a while until you want it again.
    The BACK button works a different way. It can be setup to do a number of different things, depending on the application, but in general, the BACK button can be used to exit and close an application. If you know you are done with that application and you don’t want it running in the background using up memory and battery, you want to press the BACK button to close the application. Let’s say you are once again checking scores in the Browser application and the game finishes, so you decide to close the browser. You can press the BACK button to exit the Browser. It is now closed and not running in the background. If you open the Browser again, it will be a new session and the home page will be presented.
    I mention this because with smart phones having multiple applications running at once can be a memory and battery hog. Choose wisely if you wanted to simple press the HOME button or the BACK button. If you get too many applications running in the background, things will get slow and your battery will drain quickly. With Android 2.0+, Google introduced a new section in the system settings page called “Running Services”. This allows you a quick view of what applications are running, just in case your Droid starts to get sluggish like a wet sponge. From that section, you can kill any application you no longer want.
    Below are links to some phone user guides. They will have details that are specific to your device, which I’m not covering here. I will update this page as Android evolves."
    Is he saying that "BACK" actually closes applications? I was under the impression that applications never closed, until you reboot or "force quit."
    - d n v n k
  2. Master Droid
    joeymoose's Avatar
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    #2
    The may not close completely but they stop hogging CPU and allow what you are currently doing be priority...
  3. Droid Sensei
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    #3
    For your reading pleasure:
    http://www.droidforums.net/forum/dro...ackground.html

    FYI, I just tried his supposed method and that apps (aCar and 2 browsers) and they are still active in the background (i.e. hitting back did NOT 'close' them). But no big deal, see the above thread.
    You are right to be wary. There is much bullcrap. Be wary of me too, because I may be wrong. Make up your own mind after you evaluate all the evidence and the logic. - Mark Rippetoe
  4. Droid
    dnvnk's Avatar
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    #4
    Thanks guys,

    Yeah I figured they didn't actually *close*, and I just thought it odd that the author of that site would make that claim.
    - d n v n k
  5. Master Droid
    ShowTime's Avatar
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    Has that newly rooted smell...
    #5
    I've tested both (opening an app and using either Back or Home to exit and then checking with Astro's built in app killer) and both methods tend to "leave apps running". And on his example, while using the browser, hitting Back isn't going to actually just close the browser app. It's going to scroll back through every webpage you've visited that session. Same with any app. Yes, hitting home, then reopening the app will return you to the same place, but hitting back works the same way, only it will just take you back through every page/view, to the one it was on when you started the app initially, and will then close, returning you to that same screen (just like hitting home) should you reopen the app.
    Last edited by ShowTime; 03-06-2010 at 01:53 AM.
  6. Developer
    adrynalyne's Avatar
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    Droidzilla
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    #6
    The App has to be coded to exit with back button.

    So in some cases, its true.
  7. Droid Ninja
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    #7
    Per app basis some are designed to exit from the back button, EStrong file manager is one I can think of right now, but most apps don't utilize that function because as the linked post above says, you don't need to close the apps.

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