Hi Xiongzh,
Do something like the following where appropriate:
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(Quit Y/N?)
My strategy is to only show a Toast (and maybe Vibration) (warning the
user that the next Back will exit the app) if the user has already
very recently (2 secs ago) hit Back to return to the main activity
from a secondary activity.
This doesn't help the situation of accidentally hitting the back
My first thought was to suggest that you rethink if you really need to
do this - maybe your app isn't going to be as important to your users
as you may think.
But then, I been frustrated in the past by games which exit in the
middle of the game if you press too far right...
Maybe you should
Some of my customers are accustomed to use the back button to go back
to the previous activity. Some complained that they often navigate out
of the application by pressing back button. I think it would be nice
to customers if they can be warned.
Thanks for your suggestion.
How do think the
You can override onBackPressed in your Activity. This is called when
the user presses the back button, before your Activity is finished by
the system. You could pop a dialog asking the user to confirm this
action, if they hit yes you call through to the super and the Activity
gets finished, if
Wait I'm a bit confused... If the user wants to hit the back button to
go back to the previous Activity, I'm assuming you're talking about a
previous Activity within your app? This functionality is native to
Android and should be maintained throughout your app. If you start an
activity for result
Yes, I have keep in back stack what should in the back stack.
But sometimes customers just want to navigate to the activity in the
bottom of the stack, i.e, the first view the see, the main view I
assume. They are not intent to leave my application.
That's why they ask for a confirmation when
But it's totally transparent to the customer, isn't it?
The activity should be in the very top of the Android stacks. So it
would be bring up again quickly.
On Apr 27, 3:28 pm, patbenatar patbena...@gmail.com wrote:
Restarting the Activity in onStop sounds incredibly intrusive for your
user
Maybe an audible cue that they are about to navigate back out? But, as
others have said, that navigation should have no bad consequences, so
the user need not be aware of it.
While a home navigation in the option menu is not desirable, that
would be one way to enable your users to return to the
I would strongly advise against fighting the normal stack-based work-
flow of android activities.
If the user pressed the back-key, he/she probably wants to 'go back'.
Don't fight your customer on this. Don't try to break or modify the
work-flow model of Android.
But, if you must, you could warn
Streets Of Boston is completely right.
You say you have had users complain about hitting back and returning
to Home.. These users must be new to Android and have not come to
understand how their new mobile system functions. Think about how many
users actually desire the native behavior from your
I've also had users complain that they accidentally pressed the back
button (usually on the Droid) while they were playing a game. Now
that I have a Droid, I can see that this would be fairly easy to do
since the buttons are on the same pane of glass as the display.I
think the issue is with
You should catch the back key, and do what behavior you want when it is
pressed.
Do not do this kind of stuff in onStop(). It is only going to cause you
pain. For example, the the user receives a phone call when in your app, the
in call activity will be displayed, you will be stopped. When
Yes, you're right!
too many side effects if implemented in onStop()
thanks
On Apr 28, 7:23 am, Dianne Hackborn hack...@android.com wrote:
You should catch the back key, and do what behavior you want when it is
pressed.
Do not do this kind of stuff in onStop(). It is only going to cause you
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