hello, Ivano!

how can I help you today?

HI Mark good morning! Yesterday you casually helped me on so

but still does not work. Basically I have a recyclerView and on click of an item I want to launch an activity with the content of the item, a String

yes, I remember that question -- I did not realize that was you

I was confused by some of your follow-up material in that question, which is why I did not respond further

you suggested me to pass in the Adapter the context extending it fromthe view(yes was me with one of the accounts I use to ask questions)

I imagined that

basically I am really surprised that even if in MainActivity I cancel the fragment call and just pass an explicit intent to launch an activity! does not work

I am wondering what I have to do to debug startActivity, i went into the internals and discovered that is triggered by some startActivityForEvent

my understanding was that you were successfully launching the activity, but you were not getting the results in that activity that you were expecting

and get a code -1 if does not work,

not at all

this is the mystery

an activity is launched but is empty!

so, your problem would seem to be in that activity

completely, I tried to put TextView hardcoded to recognize which Activity was, but nothing happens, is like startActivity(intent) does not start my target at all!

well, it's triggering something

I am wondering could be that since I have APPLication that is starting Dagger2, the cycle of the dependencies could mess up the original context

so my first curiosity is there are different contexts?

well, sure

i tried also getAPplicationContext

I would start by determining exactly what is coming onto the screen

you are calling startActivity(), and something is coming onto the screen

how can i achieve that?

this is correct Mark!

an empty activity

the simplest solution would be to start the Layout Inspector

but log does not bring me nothing

nor breakpoint

mmh

if you have multiple activities running, the Layout Inspector should show you a drop-down of those activities

great suggestion Mark

cool

and from there, you can identify the class that is the activity that is in the foreground

that is the last one

yes, IIRC

IIRC?

my guess is that it is indeed the activity that you are expecting, but there are problems in that activity's implementation

IIRC = "if I recall correctly"

:)

if would be as you reckon... why onCreate is not called? I have even put a log before of the super method

since I don't have the code, I cannot readily answer that

this is the activity target https://bitbucket.org/trocchietto/bezinning/src...

reallly small

have you confirmed that it is what is being started by your startActivity() call?

I am checking with L inspector

depending on what else is in R.layout.bezinning_content, your UI might be empty if EXTRA_MESSAGE is null, blank, etc.

this is bezinning_content

right, so if EXTRA_MESSAGE is null, empty, etc., you would wind up with a blank UI

I added also a TextView with text attribute hardcoded ciao

no

because in the main activity I put a lot with intent

and the breakpoint says that has extras

lot=log

perhaps the extras are using different keys, and so your startActivity() call is using an Intent that does not have EXTRA_MESSAGE

I am gonna to ascertain before that L inspector is targeting my promised land activity

Mark, you were right!

yay! but, um, what did I get right? :-)

actually the L inspector asked me to chose between two activities furnishing me the snapshots, one is main activity that shows the rec view (because the fragment is on top)

I am trying to change name in the manifest to have a double check

"completely empty" meaning that your layout did not load, or that the layout is there (ScrollView, RelativeLayout, and TextView), but that the text is empty?

nice question I am checking

the Layout Inspector output will show you the view hierarchy for your selected activity

oh mark!

I added a label attribute in the manifest" ciao" and also without L inspector now on click I can see that the activity with the action bar ciao is triggered!

i am going to check about the structure now

i have indeed a structure Linear Layout/Frame Layout/decor_content(ActionBarOverlayLayout/actionBar(Toolbar)

in your activity, you are overriding the onCreate() method that takes persistentState: PersistableBundle? as the second parameter

then on the same level of LinearLayout I have navigationBarBackground(View) and statusBarBackground(View) is so beautiful to go so deep and let the magic away!

do you mean target activity?

yes, the one whose code you provided here in the chat

since you are not using that PersistableBundle, perhaps override the classic onCreate() that only takes a Bundle, since it feels like your current onCreate() is not getting called

(sorry as you see I have problem with context:) )

yes it takes PersistentBundle? as the second parameter

so can i set it as null

I am suggesting that you get rid of it, and override onCreate(savedInstanceState: Bundle?) instead

as that is what that *vast* majority of activities do

and you seem to be having a problem where this two-parameter onCreate() is not being called

you are a god

is working

I have not looked at the PersistableBundle stuff in quite some time, since it never seemed to be that popular

tomorrow a company invited me for a second interview, if they take me and I will focus on android I will become better than you. promised!

but how do you come to this solution?

I wish you luck!

I would neve never understood that!

10 years of dealing with Android, I suppose

thanks for the good luck!

ehy Mark, I have a meta question regarding that

is about context in general

can i bother you with that one?

sure

well before to posto on SO, I already found that there are a bunch of ways to pass the context

for instance injection,

otherwise a get in application

or as you told me to use it from the onBindViewHolder passing view.getContext()

my question is ... is the context always the same?

no

after all is a class

???

I am really curios about this black magic

this is a bit old, but it is one of the best discussions of the roles of different types of contexts that I have seen

in general, Context is a mess

but for the purposes of a startActivity() call from the UI, you want a Context that is tied to the UI

a View's Context is going to be tied to that UI in normal circumstances

ah

and you had a View available

so, that was an easy way to get a suitable Context

so I passed the context of the main Activity

that too can work

but using getApplicationContext() would not, as you would get an error asking if you wanted FLAG_ACTIVITY_NEW_TASK (at least on many versions of Android)

why is that?

I mean is a singleton instance

so is like Europe and I am in the Netherlands

yes, but then it is not tied to any particular task (back stack of activities), and your app can have several of them

I see

an activity is part of a task, so starting another activity from that first activity's Context just keeps the new activity in the same task, unless you take steps to change that

because Activity inherith from an internal context that is linked to ContextWrapper

this is awesome

so basically is correct to say that I can use context in an Activity because there is a super method in Oncreate that refer to A context class up to the hierarchy?

where the green ants dream

it's really rather complicated

usually I just say "an Activity is a type of Context" and go with that

perfect

but, yes, there is a ContextWrapper involved

but one day will hack that

Mark thank you very much and my compliments also for your fluency in Kotlin

I'm getting better with Kotlin, but it is a rather complex language

anyway, I am glad that you have things working better now

yes I am getting diabetes for all that syntactic sugar

thanks

LOL

and I wish you a pleasant day

and to you as well!

thumb up

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