Greetings-


I am about to dive in to learning how to implement AppWidgetHost for a lockscreen replacement customizable with widgets. I've seen this done on a few other apps out there but the process doesn't seem very well documented. I cannot seem to find any tutorial or resource besides the limited information in the developer.android.com site. I am attempting to search the stock Launcher source code to construct a tutorial so that others can learn from these efforts. Has anyone seen a reference or tutorial guide to placing appwidgethost in your own activity? It seems the only other use for this would be for devs working on custom home replacements. I also wish to emulate shortcuts & app launch icons but first I am focusing on implementing widget host.

Here's what I've learned so far. This code is letting me put widgets in, they aren't nicely spaced or padded yet and I am working on adding size check so i can properly fill up a row then push the next requested widget to the next row. i also need to implement a way that the state is saved as persistent. it needs to remember what widgets have been added. then all that's left is more advanced fine tuning like repositioning & deleting or at the least a simple clear function.

removed--- new progress updated in main code

removed--- speculation made obsolete by tested code

so i think what i really need to make this work is a relative layout. this way, the base layout is relative, or i can place a relative somewhere inside one of my other lockscreens (for example to provide a 4x2 widget space at the bottom of lockscreen). then i can use that relative as a parent, and add the widget views along with location rules as i determine fit of the widget user is selecting.

Code that proves this is a good idea is now above in the tutorial example code. not quite finished yet. but it is much better than the proof of concept we had had so far.



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For persistence, I learned that all you need to do is log in an array the actual AppWidgetManager ID that gets assigned automatically when user completes the pick activity. your code that does the add view also gets access to this ID. You can save those in a data base and then re-add the views just by supplying the ID to the create function.
So the on-create loads the database and checks if it has items, if so it runs the add for each one in the index. I'll post the code once I get it all running. Have not had time.

Thanks for this article, got me started on the subject
Question now:
Where does this WidgetScreen come from?

int appWidgetId = WidgetScreen.this.mAppWidgetHost.allocateAppWidgetId();

i4nc4mp,

Would it be possible to store the widget so it can be restored upon re-launching my app without going through the pickwidget activity?

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First of all, thank you, this is the only source of a widget setup on the internet, that my small mind could comprehend.
I am currently developing a launcher myself and I'd like to ask if I could use some of your code in there.
thank you very much!

WidgetScreen is nothing but the screen size of the software width of the coding that is depends on Device

Thanks a lot for this - it is very helpful! I have a couple questions that I was wondering about... first, has anyone figured out how to persist the widgets and their configurations? Second, the widget I attached in my app shows up properly, but it doesn't update its view when it is touched/clicked - any idea how to do that? I am hoping I don't need to use the BIND_APPWIDGET permission!