Activity odds n ends, and eclipse platform source attach

It’s worth noting this bit of oddity about adding headers/footers to ListView and the ListView getting a wrapped adapter. On the other hand, he implements no empty view. I went back and looked at my reference app for a lot of how I want things to work, gtasks (wish the developer would open source it!). And wouldn’t ya know it – the text entry field that he has as the header? can’t be reached by navigation. I don’t feel so bad now :-) Though it’s still a nifty implementation I want to copy.

Another thought about having an “Add item” list header/footer – if it’s in the footer, the virtual keyboard will helpfully cover it up so the user can’t see what s/he is typing. So that’s a good argument for having it in the header. Though I think I’m gonna just try having a header element that acts like a list item and goes elsewhere to create a new item; I don’t think it’ll even require a custom adapter.

An interesting tidbit: Activity.finish() evidently is not a trap door like “exit” in C or bash; whatever method you’re in continues execution, and only when you complete whatever callback you’re in the middle of (since *everything* in an Activity is driven by some callback) does the Activity see that it’s time to leave and heads for the exits in an orderly fashion (first calling onPause() where you can helpfully check isFinishing() to perform any last-minute actions, then onStop, then onDestroy). I guess it seems obvious now that I think about it, but it was surprising at first.

Checking for isFinishing() in onPause() is probably a better way to handle the back key than onKeyDown() which gets called on every type of keypress.

I need to make a note to read this post on styles and themes more thoroughly. For now I’m just gonna use it to find out what I can put in textAppearance :-)

Ooh! A more coherent post about attaching platform source in Eclipse! It’s not trivial (which is good to know) but doesn’t look too bad. IRC folks helped me with that… damn IRC folks can be helpful! This was written quite some time ago, so I think it could use a little updating. Notably, you want to get a version of the repos that matches what you’re developing against. It’s not immediately evident which branch names to use – there doesn’t seem to be a logical scheme like “release-1.0, release 1.1, release 1.5…” When repo gets a project, it lists the branches and tags for it, which look something like this:
 * [new branch]      cupcake    -> korg/cupcake
 * [new branch]      cupcake-release -> korg/cupcake-release
 * [new branch]      donut      -> korg/donut
 * [new branch]      donut-release -> korg/donut-release
 * [new branch]      eclair     -> korg/eclair
 * [new branch]      master     -> korg/master
 * [new branch]      release-1.0 -> korg/release-1.0
 * [new tag]         android-1.0 -> android-1.0
 * [new tag]         android-1.5 -> android-1.5
 * [new tag]         android-1.5r2 -> android-1.5r2
 * [new tag]         android-1.5r3 -> android-1.5r3
 * [new tag]         android-1.5r4 -> android-1.5r4
 * [new tag]         android-1.6_r1 -> android-1.6_r1
 * [new tag]         android-1.6_r1.1 -> android-1.6_r1.1
 * [new tag]         android-1.6_r1.2 -> android-1.6_r1.2

…but often with a lot of clutter that varies from project to project. Now if you try to do repo -b with one of the tags (which seem logically named), it complains, probably because tags aren’t branches. Maybe there’s a flag to access those. But to get a branch, the way to go seems to be getting it by codename, i.e. cupcake, donut, eclair. Those are probably moving targets, while -release ones will be old. (You can’t win.)

And then when you’ve finally downloaded it, it needs moving around before you can even use it. And then there’s the poor guy saying his download never finishes. You know what? After I’ve got this figured out, maybe I’ll upload snapshots of zipped-up attachable code for each release to my free web hosting space for others to use without all the fuss :-)

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3 Responses

  1. Please do! It would make everyone’s life so much easier! I go absolutely NUTS when I can’t browse source and Google’s javadocs are shamefully bare. :-(

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