Le 26/03/2014 19:26, Gustavo Niemeyer a écrit :
On Wed, Mar 26, 2014 at 3:21 PM, Jouni Helminen
<jouni.helmi...@canonical.com> wrote:
sorry, the Android "up" button in the action bar. Which is what our back
button effectively is, since we have no chronological back
From the document at [1], in the "Back" section:
"After the main views of your app, subsequent views will use a back
button in the header to navigate back to the main views. Back always
returns to the previous view of an app, until the user reaches the
main view again."
This is a traditional back button, and in Android it sits in the
bottom bar, left side.
[1] http://design.canonical.com/2014/03/new-apps-header/
Yeah, and this statement isn't completely true. The back button on
Android is cross-activity, not per application. You navigate when
pressing the bottom back button an Android (unless the application
restack itself in a new task as webviews for instance) to the previous
activity (or fragment view if inserted manually to the back stack),
being an acitivity of your applications or another one, from the current
task.
What Jouni tells is true, the up button in Android app supporting 3.0+
(or using the compat library for 2.1+) available in the ActionBar on top
is an "up" and not a "back" button. It will get up in the application
hierarchy.
Example to show the difference:
You have a social application (app A) and want to send an email (app B):
- on app A, you click to "send an email"
- app B starts the "compose an email" activity
Here:
-> it you press the "back" button (the bottom one), you stay on the same
task, and returns to the app A screen
-> if you press the "up" button (near the application title, where we
have our "back" button on Touch), you will navigate to another activity
from app B (and starts a new task) which will probably display all inbox
content.
There are as well additional flags on task reset, I won't expand right
now :)
So indeed, the document needs to be updated I guess to remove that
confusion.
Cheers,
Didier
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