> On Oct 7, 2016, at 2:15 PM, Gianluca <[email protected]> wrote:
>
>>
>> Il giorno 07 ott 2016, alle ore 20:09, Eddie Sutton
>> <[email protected] <mailto:[email protected]>> ha
>> scritto:
>>
>> Thank you for your reply Jason.
>>
>>> On Oct 7, 2016, at 1:01 PM, Jason H <[email protected] <mailto:[email protected]>>
>>> wrote:
>>>
>>> It seems like the activity catches it and removes itself from the stack.
>>> Is it crashing? If so paste the exception.
>>
>> I think maybe you are correct.
>>
>> I see no exceptions in adb. Instead it appeared the app was closed
>> deliberately.
>>
>> Perhaps the problem is that I do not understand the Android back button.
>> Does an Android user expect the back button to close an app?
>>
>>
>> D/TSR (25898): ../source/source/mainwindow.cpp:812 (virtual void
>> tcmw::MainWindow::closeEvent(QCloseEvent*)): ************************* C L O
>> S E ******************
>>
>> I/ActivityManager( 563): Process com.ditchwitch.tsr (pid 25898) (adj 9) has
>> died.
>> I/WindowState( 563): WIN DEATH: Window{42c61a48 u0
>> com.ditchwitch.tsr/com.ditchwitch.tsr.tsractivity.TsrActivity}
>> W/WindowManager( 563): Force-removing child win Window{42caa3f8 u0
>> SurfaceView} from container Window{42c61a48 u0
>> com.ditchwitch.tsr/com.ditchwitch.tsr.tsractivity.TsrActivity}
>>
>>
>>
>> I expected Android button to retain my app state, suspend app to background,
>> then restore suspended state when reactivated.
>
> Default behavior of Android on back button is to terminate the application.
> If you don’t want this behavior you have to capture the back button and
> handle.
> This is not Qt thing … it happens also if you are programming in Java.
>
> http://www.androiduipatterns.com/2011/03/back-button-behavior.html
> <http://www.androiduipatterns.com/2011/03/back-button-behavior.html>
So most Android users will be irritated if I intercept the back button and do
not let the app close??
I thought the Android back button was supposed to back-track through the apps
the user had opened before the current app.
-Ed
>
>
>>
>>
>> -Ed
>>
>>
>>> >Has anyone seen this?
>>>
>>> I cannot find any useful clues in adb.
>>>
>>> The app terminates unless I add a keyReleaseEvent to accept the Key_Back.
>>>
>>>
>>> #if defined(Q_OS_ANDROID)
>>> ///
>>> /// Android back button kills TSR ?
>>> ///
>>> /// Adding a keyReleaseEvent that accepts the event prevents the crash.
>>> /// I do not understand reason why.
>>> ///
>>> /// Ignoring the Android back button will annoy users but is better than
>>> crashing.
>>> ///
>>> void MainWindow::keyReleaseEvent(QKeyEvent *event)
>>> {
>>> if( Qt::Key_Back == event->key())
>>> {
>>> qDebug("Android Back button");
>>> event->setAccepted(true);
>>> }
>>> }
>>> #endif
>>>
>>> Thanks in advance,
>>>
>>> -Ed
>>>
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