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"android-developers+nore...@googlegroups.com" <android-developers+nore...@googlegroups.com>编写： Today's Topic Summary Group: http://groups.google.com/group/android-developers/topics * Drawing on a canvas like normal VS OpenGl [2 Updates] * Launching an application from a email. Is that possible? [1 Update] * DNS WHOIS query support [2 Updates] * First attempt at LVL Licensing [1 Update] * About viewstubs [1 Update] * How to stop ADB server [1 Update] * What type of messaging would you use? [1 Update] * HTTP parameter question [1 Update] * Interaction with other apps [2 Updates] * convert web page to pdf [2 Updates] * How to access mail ? [2 Updates] * "Use wireless networks" setting not always available? [1 Update] * Can't Uninstall [1 Update] * App Add-on [1 Update] * Gingerbread BroadcastReceiver Issue [2 Updates] * partial wakelock for 3G in Android [1 Update] * Prevent application - after Factory Data reset [1 Update] * Making cross-thread blocking/sync calls [1 Update] * How to interrupt a blocking I/O operation? [1 Update] Topic: Drawing on a canvas like normal VS OpenGl<http://groups.google.com/group/android-developers/t/a441292fc2094c4e> Tim <tdh...@gmail.com> Jan 08 04:52AM -0800 ^ > So I was just wondering is openGL better in terms of making a 2dgame. does > it render faster then if I were to draw on a Canvas.... I would definitely go with OpenGL. I've not used the canvas, but I seriously doubt it is as fast, and definitely isn't as flexible. It may be easier to use though if your game is simple (e.g. I would use it for something like a board game). Also, using OpenGL will let you easily port your game to other OSes (except WP7). David Turner <di...@android.com> Jan 08 04:25PM +0100 ^ > So I was just wondering is openGL better in terms of making a 2dgame. does > it render faster then if I were to draw on a Canvas.... It really depends on what you're doing.There are certain things that are simply not possible or simply slower with OpenGL (e.g. high-quality anti-aliased vector rendering being one of them). Also not all GLES driver/chips are the same, and your performance may vary. -- Topic: Launching an application from a email. Is that possible?<http://groups.google.com/group/android-developers/t/c84ce967b77abc75> sdphil <phil.pellouch...@gmail.com> Jan 08 07:12AM -0800 ^ okay, i finally got this to work, but it will only work if i use a unique scheme. if I try to do it without a standard http scheme, then i can't get it to work -- even if I specify mimeType. Topic: DNS WHOIS query support<http://groups.google.com/group/android-developers/t/d0ec6ef3ffd07aba> "JAlexoid (Aleksandr Panzin)" <jalex...@gmail.com> Jan 08 06:58AM -0800 ^ "JAlexoid (Aleksandr Panzin)" <jalex...@gmail.com> Jan 08 07:07AM -0800 ^ http://www.dnsjava.org/ might help. Though, how it works on Android I don't know.... Record [] records = new Lookup("android.com", Type.NS).run(); for (int i = 0; i < records.length; i++) { MXRecord mx = (MXRecord) records[i]; System.out.println("Host " + mx.getTarget() + " has preference ", mx.getPriority()); } Topic: First attempt at LVL Licensing<http://groups.google.com/group/android-developers/t/1699b73b26e2667b> Neilz <neilhorn...@gmail.com> Jan 08 06:40AM -0800 ^ Hi all. I'm implementing this into my app and reading through the docs. As I understand it I should be able to add a test email address (the one set up in my device) and it should return whatever response I set. However, all I'm getting back is Application error: NOT_MARKET_MANAGED Do I have to upload my app to the market for this to work? Currently it isn't, but the docs seem to tell my that this isn't necessary for test accounts. Thanks. Topic: About viewstubs<http://groups.google.com/group/android-developers/t/e94c0c717d53c482> Pedro Duque <pmdu...@gmail.com> Jan 08 02:34PM ^ I'm trying to gasp viewstubs but I feel I'm missing something. As I understand, a viewstub only exists in a hierarchy until inflated or until made visible. After that is replaced by its referenced layout. This behaviour makes impossible to reinflate a inflated viewstub. Is this correct? The behaviour I was looking for was to have several buttons that would open diferente viewstubs. When I click a button it would deflate the previous layout and inflate the new one but this only works the first time... After that the viewstub is gone... Topic: How to stop ADB server<http://groups.google.com/group/android-developers/t/e43f3d97256d178a> Kumar Bibek <coomar....@gmail.com> Jan 08 06:20AM -0800 ^ What do you mean by dynamically? From inside an app? What would you try to do that? Anyway, to shut down the adb server, you just have to use this commands adb kill-server adb start-server These are command line tools available for you to interact with adb. Topic: What type of messaging would you use?<http://groups.google.com/group/android-developers/t/b0600155ad82d162> Kumar Bibek <coomar....@gmail.com> Jan 08 06:17AM -0800 ^ Well, for reliable working, I think it would be best to use multiple channels. SMS, cloud and local network(wireless or LAN), one of these when the others are not available. Topic: HTTP parameter question<http://groups.google.com/group/android-developers/t/ce46f4c50f1c8992> pedr0 <pulsarpie...@gmail.com> Jan 08 05:54AM -0800 ^ You could use a StringBuilder but is very simple build it yourself without any help, I think. See this for stringbuilder :http://www.javadb.com/using-the- stringbuilder-class Topic: Interaction with other apps<http://groups.google.com/group/android-developers/t/b4b7c7e3aaca1fbd> emafuma <emanue...@gmail.com> Jan 08 01:13AM -0800 ^ Hi, I'm investigating if I can make an app that runs in background but is able to interact with others by "enriching" texts adding relevant information. For instance, interact with an existent twitter app or the mail app reading text and showing a popup with detected relevant words. Is there a way to do so? Thanks in advace for any help Mark Murphy <mmur...@commonsware.com> Jan 08 08:32AM -0500 ^ > information. For instance, interact with an existent twitter app or > the mail app reading text and showing a popup with detected relevant > words. Is there a way to do so? Fortunately no, as that would be a substantial security hole. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.4 Available! Topic: convert web page to pdf<http://groups.google.com/group/android-developers/t/603158a4b6c2135e> kavitha b <kkavith...@gmail.com> Jan 08 02:42PM +0530 ^ Hi All, I have requirement in which I need to convert web page to pdf. How to do this in android? Please help. Thanks Kavitha Mark Murphy <mmur...@commonsware.com> Jan 08 08:31AM -0500 ^ > I have requirement in which I need to convert web page to pdf. Whoever gives you these requirements desperately needs to get a grip. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.4 Available! Topic: How to access mail ?<http://groups.google.com/group/android-developers/t/7aa1e15226fb15bc> Bob Kerns <r...@acm.org> Jan 07 10:16PM -0800 ^ > You forgot the battery of permissions, one per email app, needed to > give users control over what app/spyware can receive these broadcasts. > Otherwise, though, you're probably on the right track tech-wise. I didn't forget, but I did omit the issue to focus on the main point. But you'll note that my suggested minimal protocol side-steps the issue by not exposing anything about the email other than its arrival, except via an optional content provider URL. That's where the permissions would hook in. > IMHO, it's a bit more complex than that. You are correct that the tech > isn't the big problem. But anything that involves herding cats...er, I > mean, developers...can never be described as "simply". Actually, the cats in question here are already in a herd called the Google Android Team. The real herding operation comes in when you try to get developers of other applications to join in -- but it helps if you already have a herd! I've tried to do that herding on my own. From my perspective a lot of the problem is not having a good communications framework and context for proposing and discussing such proposals. OpenIntents.org is a good start on that. I just checked on them, and there's a lot more content and it's a lot easier to comment. It's really important that these discussions occur in a visible place. Email is NOT a good medium for this. What you propose below is another approach to this -- unifying applications in the face of non-standardization. It has its merits, especially as a transitional measure. It is also an opportunity to establish a defacto standard, especially if it publishes the best protocol as an OpenIntents.org interface, and supports that well. New apps (or old) which want to integrate well, could implement that protocol. But a bit of leadership from Google would really help here. For example -- one VERY easy thing that the Google team could do is to publicize OpenIntents.org here: http://developer.android.com/intl/de/resources/community-groups.html Mark Murphy <mmur...@commonsware.com> Jan 08 08:28AM -0500 ^ > issue by not exposing anything about the email other than its arrival, > except via an optional content provider URL. That's where the > permissions would hook in. Off the cuff, I'd want the permissions even on the broadcasts, but that might just be me. > protocol as an OpenIntents.org interface, and supports that well. New > apps (or old) which want to integrate well, could implement that > protocol. Nowadays, I run in that direction under the "my arms are too short to box with Google" mindset I'm sporting. > example -- one VERY easy thing that the Google team could do is to > publicize OpenIntents.org here: > http://developer.android.com/intl/de/resources/community-groups.html I've been lobbying for this since 2008. If I can't convince them to put a frakkin' hyperlink on a Web page, there's no way in hell that I'm going to convince them to standardize APIs for calendar, email, etc. As I said, "my arms are too short to box with Google". That's why I see the only hope in being a community-led approach: -- Create an API (e.g., email) -- Convince third-party app developers (e.g., K9) to implement said API, probably by helping them design the API in the first place -- Create a wrapper that uses all sorts of nasty techniques to graft that API on top of what's in Android today (e.g., Email app, device-specific email clients) -- Pray for a groundswell of apps using said API -- Much later, after this stuff becomes popular, try to contribute patches back to AOSP to put the API officially on this stuff, so we can get rid of (or at least shrink) the wrapper However, the kernel of all that is somebody with the itch to scratch. Right now, I don't have the itch to standardize email, calendar, etc. APIs. At most, I have the meta-itch of figuring out a process by which we can collectively get stuff like that done. I'm with you, in that I think Android is a more powerful platform with these sorts of things in place. However, my plate overfloweth, and I have lots of windmills to tilt at, to mix metaphors. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.4 Available! Topic: "Use wireless networks" setting not always available?<http://groups.google.com/group/android-developers/t/88a2f6c4e619e960> michael <michael.d.peder...@googlemail.com> Jan 08 05:16AM -0800 ^ Hello, I have an app that relies on wireless network location, i.e. which receives location updates from the NETWORK provider. In order for this to work, the phone must have "Use wireless networks" enabled under the "Location & security" settings, and my app instructs the user on how to enable this. However, it turns out that some phones (e.g. on certain American carriers) don't have this setting at all. Instead they have two settings: "VZW location services" and "Google location services" My questions: 1) Am I correct in assuming that the first of these refers to mobile network location, and the second to Wi-Fi network location? 2) How can my app detect whether the phone has the single "Use wireless networks" option, or if it has both of the above mentioned options? I imagine that the naming of "VZW location services" is carrier-specific -- is there any way of obtaining the name of this option programatically so I can provide appropriate instructions to my users, ideally localised to the user's language? 3) If the phone has both settings, how can I detect which ones are enabled? In other words, what is the return value of LocationManager.isProviderEnabled("NETWORK") if e.g. only "VZW location services" is enabled and not "Google location services"? Any pointers would be greatly appreciated. Best, Michael. Topic: Can't Uninstall<http://groups.google.com/group/android-developers/t/948801201f27bb6c> nextgen <nextgenfant...@comcast.net> Jan 08 04:57AM -0800 ^ Not the same package name. By keywords, I mean that they look for the app using the Market App Search function and find ours at the top of the list with a very similar name, so they assume it's the same. Topic: App Add-on<http://groups.google.com/group/android-developers/t/20745373a3e3f80d> Brill Pappin <br...@pappin.ca> Jan 08 01:29AM -0800 ^ First, let me point you at this RFE: http://www.google.com/support/forum/p/Android+Market/thread?fid=2d69022f36ab6f460004994e8be08b82&hl=en I've noticed the LVL library has (and talks about) using a double license check. You could actually use this kind of pattern to add license levels to your app in the way your talking about doing. The consumers act of buying and installing would flag a feature in your db. I've also been considering another approach where your main app would look up features in a content provider. This has the advantage that if the enabling app was uninstalled, you would no longer be able to access the new features. Also, your users would not get duplicate icons in their launcher if you don't provide a main activity. - Brill Pappin Topic: Gingerbread BroadcastReceiver Issue<http://groups.google.com/group/android-developers/t/d87fb390c13d141d> Jake Basile <jakerbas...@gmail.com> Jan 07 11:03PM -0800 ^ I assumed it would get killed and attempted to design around that so that it gets restarted. I return START_STICKY onStartCommand, which I interpreted as meaning it will be restarted after it is killed. Is that incorrect? What can be returned from onStartCommand that can cause onDestroy() to not be called? Dianne Hackborn <hack...@android.com> Jan 08 12:11AM -0800 ^ Yes then it will restart. You may want to have a look at the log when it goes away to see if anything interesting is printed. Also "adb shell dumpsys activity services" well tell you the state of currently active services (even if their process isn't running). Oh also check for crashing. If a service's process crashes a few times, the services in it will be force removed. -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. Topic: partial wakelock for 3G in Android<http://groups.google.com/group/android-developers/t/c04507a80d693263> Tabman <tabishfay...@gmail.com> Jan 08 12:04AM -0800 ^ Hello, Anyone from android development team confirm the answer to this: http://stackoverflow.com/questions/4628058/partial-wakelock-for-3g-in-android/ Thanks Topic: Prevent application - after Factory Data reset<http://groups.google.com/group/android-developers/t/d0470e346ed14963> Bob Kerns <r...@acm.org> Jan 07 11:51PM -0800 ^ Be nice to your users, making your application such an integral part of their lives that they would never DREAM of doing a factory reset -- for fear of losing your app and ruining their lives forever. Other than that, if you're an IT department wanting to make sure your corporate apps aren't lost on a reset (and enabling a reset as a way to wipe it for either support purposes or to reassign the device): Do what Mark said -- become your own factory, and put together your own firmware. One approach to this is through the Android Kitchen at modaco.com, the paid version of which lets you upload files to include into the final generated build. It doesn't look all that hard to put together a custom build from a stock one, but I've never tried. You'll need a modified recovery that allows you to install unsigned releases -- and you'll lose the ability to update the OS over the air, which might negate any support benefit you thought you might get. On the other hand, you might consider that a feature! I guess there's also the negative strategy -- make it clear you'll make their lives miserable if they do a factory reset! But I've never found persuading users NOT to do something works very well. Topic: Making cross-thread blocking/sync calls<http://groups.google.com/group/android-developers/t/8cbf33153cd855d4> Bob Kerns <r...@acm.org> Jan 07 11:37PM -0800 ^ Assuming there may actually be data to be transferred (or you invent some), you can use an ArrayBlockingQueue. Otherwise, wait()/notify() is a good choice, but you need to be careful to handle the case that the UI thread does the notify before you get into the wait() code. The usage pattern should be: UI thread code: { synchronized (mySyncObject) { <set a flag saying UI is done> mySyncObject.notifyAll(); } } Background thread code: { <post request to the UI thread> synchronized (mySyncObject) { while (! <flag saying UI is done>) { try { mySyncObject.wait(); } catch (InterruptedException ex) { // Ignore this even if we get it. } } } } That's a while loop, not an if, because the wait() call can in theory be interrupted (and you have to catch the InterruptedException). Memorize this pattern! If you're using notify/wait, it should ALWAYS look something like this. Topic: How to interrupt a blocking I/O operation?<http://groups.google.com/group/android-developers/t/bbefa403e19546d8> Bob Kerns <r...@acm.org> Jan 07 10:48PM -0800 ^ Tabman's answer might possibly be what you're looking for -- but the more general answer I'd give would be: "You can't, and you generally don't need to. What are you really trying to do?" Most of the times that people think they want to abort waiting IO, that's really not what they need. It's usually sufficient to indicate that the loop that was processing the data that its job is done. Aborting actual IO calls is an iffy thing on all platforms I've ever used. (Note I'm talking about real-world behavior here; some APIs do document a well-defined abort operation). I've done all manner of asynchronous and threaded IO over many decades, but very, very seldom have I needed to abort a pending IO operation. In fact, I may never have encountered a need to do so. Timeouts are often important, but aborting a pending I/O operation implies you don't really care whether it succeeded or failed (as that's a race condition), and yet you have a need for terminating the I/O operation too urgent for a timeout. The need for urgent cancellation I have a hard time justifying. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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