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• Newbie Android question

  - by DanyW

  Hi folks, I have just started with Android with the usual Hello World project template in Eclipse. I modified the layout XML and removed the label that says "Hello World, !", and added a couple of other controls. However, these are not reflected in the app, within the emulator. When I run this app from Eclipse again it is still showing the Hello World label! I'm sure it's something terribly simple that I have completely missed. Can someone please point me in the right direction? Many thanks, Dany.

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• Android AVD error after update to 2.3

  - by outcast

  (ubuntu8.0.4+eclipse3.6.1+ADT8.0.1) I update android from(1.5+1.6+2.1+2.2) to 2.3,but I got 1:/home/workaccount/Android/android-sdk-linux_86//tools/emulator: /lib/tls/i686/cmov/libc.so.6: version GLIBC_2.8' not found (required by /home/workaccount/Android/android-sdk-linux_86//tools/emulator) 2:/home/workaccount/Android/android-sdk-linux_86//tools/emulator: /lib/tls/i686/cmov/libc.so.6: versionGLIBC_2.11' not found (required by /home/workaccount/Android/android-sdk-linux_86//tools/emulator) when I start an AVD. All versions can't work now. I delete everything expect eclipse,download adt, AndroidSDK, platform2.3/2.2 ,still error. Heeeelp!!!

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• remove notification bar shadow in android app

  - by defrex

  In android, the notification bar at the top has a shadow most of the time. However, sometimes, such as when an app has it's title-bar showing, or in some other cases (such as in the twitter app or the market) that shadow effect is gone. My guess is that the shadow is supposed to be there when the content underneath can scroll. In my app, however, the content underneath can't scroll, and I think the shadow looks bad on the top part of my logo. Does anyone know how to disable it?

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• How to delete a contact in android 2.1

  - by Rishabh

  Hi, I have added one contact to android by following code. ContentValues values = new ContentValues(); Uri rawContactUri = getContentResolver().insert(RawContacts.CONTENT_URI, values); long rawContactId = ContentUris.parseId(rawContactUri); values.clear(); values.put(Data.RAW_CONTACT_ID, rawContactId); values.put(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE); values.put(StructuredName.DISPLAY_NAME, "Mike Sullivan"); getContentResolver().insert(Data.CONTENT_URI, values); It shows up on emulator 2.1, but when i am going to delete it manually by "delete contact" option, its not deleteing from emulator. If I edit some thing on it then only it deletes. How can i directly delete it from menu ? Thanks in advance...

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• Displaying Calendar in an Android App

  - by Rony

  Hi experts, I would be obliged if someone could provide me a solution as to which component to be used so that, I can display a fairly good looking calender in my android application. I kept browsing for a solution for the past two days, but unfortunately could not find a solution. Since, this is a very basic requisite, I am sure that, there will be a perfect solution for this. Please help with suggestions, comments and solutions. ANy help in this regard is well appreciated. Looking forward, Regards, Rony

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• Scrolling list in Android home screen widget

  - by DanyW

  Hi folks, I am trying to teach myself the basics of Android dev. At the moment I am experimenting with home screen widgets. I would like to create a simple widget that lists all my bookmarks. Somewhere in my googling I read that ListView is not usable in a widget. What's the best way to display a scrolling list in a widget? An example would be fantastic, but otherwise point me in the right general direction and I can research further. Thanks in advance, Dany.

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• Android Keep Activity from Dieing

  - by GuyNoir

  The main Activity I use in my Android application uses a fair amount of memory, meaning that on a less powerful phone, it is susceptible to being killed off when not at the front. Normally this is fine, but it also happens when I am still inside my application, but have a different activity at the top of the stack (such as a preference activity). Obviously it's a problem if my application is killed while the user is still running it. Is there any way to disable the OS's ability to kill off the application for low memory problems? Thanks.

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• Android interacting with HTML5 tutorial?

  - by Adam

  I've been looking at using a WebView to display an HTML5 webpage, where the novel features of the mobile device (GPS, compass, accelerometer, camera, etc) can be fed back into the web page. I was wondering if there were any good tutorials showing these functions interacting with the webview. So far I've found ways for the WebView to send javascript commands to the web page, but those interactions haven't been triggered from outside the web view (such as upon receiving an intent from the GPS or accelerometer). Note: The HTML5 Geolocation API is not what I'm interested in. I'm interested in the web page <- WebView interactions, as noted here: http://android-developers.blogspot.com/2008/09/using-webviews.html

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• SLI Video Cards

  - by Scott

  I'm configuring a new desktop. I'm looking through all PCI Express 2.0 x16 video cards on NewEgg at the moment. All cards seem to be stating that they have SLI Support or CrossFireX support. I know that these 2 technologies enable you to connect more than one video card together to create more of a powerful video experience. These cards that have this support seem to be more expensive that other cards though. When I did a NewEgg search for cards that did NOT have these two supports, no matches came up for PCI Express 2.0 x16 (haven't checked other interfaces yet though). Can you run an SLI/CrossFireX card as a single card (and if you can is it efficient or even good?), or do you need to have more than one card to run them? Also, do they make cards without these two technologies anymore, and are they even cheaper at this point? I really have no need for SLI/CrossFireX at all, so I was wondering what I should look into. Do cards without this technology not run on the PCI Express 2.0 x16 interface? Thanks ahead of time for all your help.

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• SLI Video Cards

  - by Scott

  I'm configuring a new desktop. I'm looking through all PCI Express 2.0 x16 video cards on NewEgg at the moment. All cards seem to be stating that they have SLI Support or CrossFireX support. I know that these 2 technologies enable you to connect more than one video card together to create more of a powerful video experience. These cards that have this support seem to be more expensive that other cards though. When I did a NewEgg search for cards that did NOT have these two supports, no matches came up for PCI Express 2.0 x16 (haven't checked other interfaces yet though). Can you run an SLI/CrossFireX card as a single card (and if you can is it efficient or even good?), or do you need to have more than one card to run them? Also, do they make cards without these two technologies anymore, and are they even cheaper at this point? I really have no need for SLI/CrossFireX at all, so I was wondering what I should look into. Do cards without this technology not run on the PCI Express 2.0 x16 interface? Thanks ahead of time for all your help.

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• Apply Alphabetical Filters on listView on Android os

  - by mudit

  Hi.. i need to create a list view that display same functionality as Contact App. I need to have a scroller through which i can traverse the list alphabetically. To achieve this i am following an example from API demos "com.example.android.apis.view.List1.java". When i implement this functionality on a static list view = it is working fine. But when i try this on a dynamic listview= it is not working. Plz help...

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• Schedule task in android

  - by Maneesh

  I am using below code for scheduling a task in android but its not giving any results. Please advise on the same. int delay = 5000; // delay for 5 sec. int period = 1000; // repeat every sec. Timer timer = new Timer(); timer.scheduleAtFixedRate(new TimerTask() { public void run() { Toast.makeText(getApplicationContext(),"RUN!",Toast.LENGTH_SHORT).show(); } }, delay, period);

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• How to implement Android Pull-to-Refresh

  - by yuku

  In Android applications such as Twitter (official app), when you encounter a ListView, you can pull it down (and it will bounce back when released) to refresh the content. I wonder what is the best way, in your opinion, to implement that? Some possibilities I could think of: An item on top of the ListView - however I don't think scrolling back to item position 1 (0-based) with animation on the ListView is an easy task. Another view outside the ListView - but I need to take care of moving the ListView position down when it is pulled, and I'm not sure if we can detect if the drag-touches to the ListView still really scroll the items on the ListView. Any recommendations?

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• Why dont Android applications provide an "Exit" option?

  - by Howiecamp

  Is there something in the Android developer guidelines that disuadea developers from providing the option to "exit" (stop running) an application from within the application itself? I love multitasking and all but it's not clear to me why: the vast majority of apps don't have their own Exit functions and hence just keep running forever don't give you a choice about running when you turn on the phone - they just do by default Both of these things lead to memory usage constantly increasing and your device running with this performance burden all of the time despite the fact that you may only want certain apps to run some of the time. Am I missing something?

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• Android ndk build mysteriously failing under cygwin with "Error 126"

  - by Jan Hudec

  I have a JNI application built by ndk-build (using Android NDK r5b and cygwin make 3.81). The build usually works, by occasionally fails with: ... Compile++ thumb : components <= Component.cpp make: *** [/c/.hudson/jobs/Nightly/workspace/application/obj/local/armeabi/objs/components/Component.o] Error 126 make: Leaving directory `/c/.hudson/jobs/Nightly/workspace/application/obj/local/armeabi/objs/components' There is no other error. Make than exits with status 2. It happens in different file each time (the name above is anonymized). It seems to happen more often with parallel builds, but sometimes happens with non-parallel builds too. Does anybody have an idea what it might be or at least how to debug it?

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• Showing edittext obliquely in android

  - by Chandra Sekhar

  I have an EditText, which generally shows parallel to the screen X-axis. I want to show it obliquely (around 45 degree to horizontal axis). Is it possible to do this in Android. Please guide me in a direction so that I can try for it. After getting the two links in the answer by pawelzeiba, I proceed a little bit in solving this, but stuck again so I put another question on this. here is the link. So please help me to solve this.

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• Best video codec to store my own collection

  - by Jack

  Hello! I think this question has already been asked but with different flavours. My problem resised in the fact that my camera (Canon G9) creates video with almost raw codec (I think it's plain old MPEG) so a 10 minutes video is almost 900mb. I would like to convert them in a format that has a good trade-off between space and quality, but I would prefer having the quality as good as the original (of course this is not possible because of lossy compression) just saving as much space is possible with a minimal lose of quality. Which codec should I look for? H264? It seems to be the champion of the moment.. otherwise which other ones could I try? XviD? Which parameters should I use? I mean how many kbits/s is a fair good bitrate to keep high quality? And what about audio codec? video specs are 640x480 at 30fps or 1024x768 at 15fps.. thanks in advance!

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• Moving between android activities on button clicks

  - by cppdev

  I am writing a android application where, on startup activity view, I have a button "DoIt". When user clicks "DoIt" button, I start another activity with different layout. On newly started activity, I have a button "Back" which should take me to the first activity. How to accomplish this. What code should I write on OnClick method of "Back" button. Also, I want the newly created activity to die after back button is pressed and application comes back to start-up activity.

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• Regular expression to match one of two video ID's in a Google Video URL

  - by Baldur

  I need to grab the video ID from a Google Video URL. There are two different types of URLs that I need to be able to match: http://video.google.com/videoplay?docid=-3498228245415745977# where I need to be able to match -3498228245415745977 (note the dash; -), and video.google.com/videoplay?docid=-3498228245415745977#docid=2728972720932273543 where I need to match 2728972720932273543. Is there any good regular expression that can match this? This is what I've got so far: @"docid=(-?\d{19}+)" since the video ID seems to be 19 characters except when it's prefixed with the dash. I'm using C# (of which I have very little experience) if that changes anything. P.s. I would also appreciate you review my regular expressions for YouTube (@"[\?&]v=([^&#])";), RedTube (@"/(\d{1,6})") and Vimeo (@"/(\d*)"). I do not expect users to enter the full URL and thus do not match the ^http://\\.?sitename+\\.\\w{2,3}.

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• Software/hardware to build video streaming server?

  - by Sasha Yanovets

  I am looking for a video streaming server solution, something like online TV server, with ability to make live broadcasts in the internet. What software could you recommend for that? What kind of hardware it should run on, should be there anything special? I am looking for a solution that could be scaled up to at least 1000 simultaneous users online with good resolution of video. I think it is good to have general answer on what direction to choose. But here more details on my specific case: I just looking for a solution almost from scratch. We have some video content that we've produced, but it is not delivered over internet yet. We do not tied to any particular vendor for now. We want to make 24 hours of steaming three 8 hour blocks with change of content every day. We want the ability to make regular live broadcasts. I guess we will need to have several options of streaming quality (low ~56 kb/s mid ~273 kb/s). Some terms just foreign to me (like play-truncation rate), if you could point out what parameters we should avare of, it would be great. Uplink to the internet is to be determined. We plan to start from something and scale up on the way. If you are already have some kind of media streaming server, just describe its configuration here (hardware, OS, software), peak number of concurrent users it serves. I think it could help people approaching this task.

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• Determine Android phone's proximity to known point while conserving power

  - by ahsteele

  I am trying to determine if an Android user has had a close proximity to a list of predetermined locations. I'd like to do this with the least amount of drain on the phone's battery. The two mechanisms I see for accomplishing this are proximity alerts and requesting location updates. What are the pros and cons of the two methods? Will one have less affect on the battery than the other? In either case I would guess the specific location manager used would affect power usage (existing Stack Overflow answer).

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• Best practice for error handling in an Android Service

  - by Omar Kohl

  I have an Android Service that does some background processing on an image using a separate Thread. If an error occurs in this Service or even worse in the thread, what is the best practice to inform the launching Activity of the problem and allow the application to recover to a stable state (i.e. the state it was in before launching the service). From within the Service I could post a Toast or a Notification, but that doesn't help me. I would like to inform the user about the problem but at the same time recover the application to a stable state.

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• Best way to get an Application Context into a static method in Android

  - by Slapout

  I'm working on an Android application that has several Activities. In it I have a class with several static methods. I would like to be able to call these methods from the different Activities. I'm using the static methods to load data from an xml file via a XmlResourceParser. To create a XmlResourceParser requires a call on the Application Context. So my question is, what is the best way to get a reference to the Application Context into the static methods? Have each Activity get it and pass it in? Store it somehow in a global variable?

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• Linux virtualization choices with graphic acceleration / video card support

  - by Urbn

  I am in the process of building a new desktop machine for work and fun. I am looking to run a undecided flavor of Linux (guessing Ubuntu) as my primary OS and several Windows installs with a Windows 7 install for .net development and gaming as virtualized environments. From my previous experiences with virtualization software in Linux I was never able to find an application that offered descent video card support / graphic acceleration etc. to be capable of playing any games within one of the virtualized environments. And since I will be investing quite a bit of money into this system for gaming I would naturally want to find the best option available to achieve this setup. So Onto my question: Is there any virtualization software available for Linux that has full video card support, graphic acceleration and capable of taking advantage of everything the video cards have to offer within the virtualized environments? Or am I stuck with running Windows 7 as my primary OS and using virtualization for Linux and the other OS's? Also I have no preference on open/closed source and price range would be up to $175.00 to support at least 3 virtualized environments.

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• Data not displayed first time in android after copying the file from assets to data folder

  - by Thinkcomplete

  Description I have used the code tip from http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/ to copy a pre-filled data file to the target and handled this in a asynch task Problem : On starting the application it gives error and shuts down first time, starting again without any change it works perfectly fine. So first time after the file is copied, the error comes but after that no issues. Please help Code attached:.. private class CopyDatabase extends AsyncTask<String, Void, Boolean> { private final ProgressDialog dialog = new ProgressDialog(BabyNames.this); protected void onPreExecute() { this.dialog.setMessage("Loading..."); this.dialog.show(); } @Override protected Boolean doInBackground(String... params) { // TODO Auto-generated method stub try { namesDBSQLHelper.createDatabase(); return null; } catch(IOException ioe){ ioe.printStackTrace(); } return null; } protected void onPostExecute(final Boolean success){ if (this.dialog.isShowing()){ this.dialog.dismiss(); } } }

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