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• Android: How to make launcher always open the main activity instead of child activity? (or otherwise

  - by yuku

  I have activities A and B. The A is the one with LAUNCHER intent-filter (i.e. the activity that is started when we click the app icon on home screen). A launches B using startActivity(new Intent(A.this, B.class)). When the user has the B activity open, and then put my application into the background, and later my application's process is killed, when the user starts my application again, B is opened instead of A. This caused a force close in my app, because A is the activity that initializes the resources my app needs, and when B tried to access the uninitialized resources, B crashes. Do you have any suggestions what should I do in this situation?

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• Android ROM Development. What does it take?

  - by Priyank

  Hi. I have been developing android apps out of hobby and fun. I want to get more serious about android development. One particular thing that I am very keen on doing (or atleast trying my hand at) is andoroid ROM development for specific handsets. Like, maybe outdated HTC Touch. (Elf/Elfin). I am at a loss to understand, what does it take to get started in right direction and what does it entails? I would really appreciate your help if you could point me to some resources which would highlight ROM Development for Android specifically. (Fundamentals of ROM development irrespective of OS would help too). Cheers

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• [Android] How do I load URL that requires login into variable?

  - by bebeTech

  I am trying to port my usage meter from a JavaScript Gadget (win) / Widget (OSX) to Android. Total newbie when comes to JAVA + Eclipse + Android 2.1 SDK. Essentially what I want to do is load a page, pass through a username and password and load the resulting page into a array that I can then run some regular expressions through. My code from JavaScript (I've replace the actual URL with a dummy one) is: xmlhttp.open("post","https://acme.com.au/your_account/index.php?function=login",false); xmlhttp.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT"); xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); xmlhttp.send("check_username=" + username + "&password=" + password); I need to know the Android equivalent to the above please. I've played around with WebView but that loads the page in a web browser which isn't what I want.

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• Android -- How to post app rating/comments to Market from within app?

  - by borg17of20

  Hello all, This is a simple question. Is there a way to allow users to enter in a comment and or rating for my app from directly within my app and have that data posted back to the Android Market? If so, what would the code for that look like if I used an EditText view to allow user input? If not, then is my only other option directly linking to my app in the Market (i.e. the user clicks the link in my app, or a button, and the Market app launches with my app page displayed)? For example: view.setOnClickListener( new OnClickListener(){ public void onClick(View v) { startActivity( new Intent( Intent.ACTION_VIEW, Uri.parse("market://details?id=packagename") ) ); } } *where "packagename" is replaced by my app's package name from the manifest. Thanks.

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• Android: How to set the contents of a Edit text from a Button click?

  - by primal

  Hi, I am a rookie to android. I am thinking of implementing a simple calculator in android to get a hold of the basics in android. I want to display a keypad with numbers and mathematical operations and when the user presses the keys the corresponding number is displayed in edit text. I tried using gettext() and updating the contents of edit text but it shows just the contents of pressed button. Also how do I read the contents of button so as to do mathematical operations in code? Any help would be much appreciated. regards, Primal

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• how to display complete Bitmap in android using Canvas?

  - by UMMA

  friends, i am using following onDraw method to display bitmap on screen. @Override public void onDraw(Canvas canvas) { Bitmap _scratch = BitmapFactory.decodeResource(getResources(), R.drawable.icon2); //ImageView img= new ImageView(Tutorial2D.this); //img.setImageBitmap(_scratch); canvas.drawColor(Color.BLACK); canvas.drawBitmap(_scratch, 0, 0, null); } image is displayed on the screen but some part because android screen is small how can i display complete image in whole android screen? can i set ScaleType of image to fitxy in canvas ? or can i add android layout image to this canvas so that i could set fitxy property or image there as i have commented the code? any help would be appreciated.

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• Singletons vs. Application Context in Android?

  - by mschonaker

  Recalling this post enumerating several problems of using singletons and having seen several examples of Android applications using singleton pattern, I wonder if it's a good idea to use Singletons instead of single instances shared through global application state (subclassing android.os.Application and obtaining it through context.getApplication()). What advantages/drawbacks would have both mechanisms? To be honest, I expect the same answer in this post http://stackoverflow.com/questions/2709071/singleton-pattern-with-web-application-not-a-good-idea but applied to Android. Am I correct? What's different in DalvikVM otherwise? EDIT: I would like to have opinions on several aspects involved: Synchronization Reusability Testing Thanks in advance.

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• Android how do I wait until a service is actually connected?

  - by Ryan

  I have an Activity calling a Service defined in IDownloaderService.aidl: public class Downloader extends Activity { IDownloaderService downloader = null; // ... In Downloader.onCreate(Bundle) I tried to bindService Intent serviceIntent = new Intent(this, DownloaderService.class); if (bindService(serviceIntent, sc, BIND_AUTO_CREATE)) { // ... and within the ServiceConnection object sc I did this public void onServiceConnected(ComponentName name, IBinder service) { Log.w("XXX", "onServiceConnected"); downloader = IDownloaderService.Stub.asInterface(service); // ... By adding all kinds of Log.xx I found that the code after if(bindService(...)) actually goes BEFORE ServiceConnection.onServiceConnected is being called - that is, when downloader is still null - which gets me into trouble. All the samples in ApiDemos avoid this timing problem by only calling services when triggered by user actions. But what should I do to right use this service after bindService succeeds? How can I wait for ServiceConnection.onServiceConnected being called reliably?

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• What Android tools and methods work best to find memory/resource leaks?

  - by jottos

  I've got an Android app developed, and I'm at the point of a phone app development where everything seems to be working well and you want to declare victory and ship, but you know there just have to be some memory and resource leaks in there; and there's only 16mb of heap on the Android and its apparently surprisingly easy to leak in an Android app. I've been looking around and so far have only been able to dig up info on 'hprof' and 'traceview' and neither gets a lot of favorable reviews. What tools or methods have you come across or developed and care to share maybe in an OS project?

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• How to simulate :active css pseudo class in android on non-link elements?

  - by chas s.

  I'd like to be able to mimic the behavior of the :active pseudo class on all elements in Android webkit. Currently, the :active syntax only works on a elements (links). Nearly all of the actionable elements in the app I'm working on are something other than a standard link tag. iOS webkit supports :active on all elements. /* works on both android iOS webkit */ a:active { color: blue; } /* works on iOS webkit, does not work on android webkit */ div:active { color: red; } I've found a couple of resources [1,2] that solve similar problems, but they're both a bit heavy, and I'm wondering if there's a lighter weight solution that I'm just not able to find. http://cubiq.org/remove-onclick-delay-on-webkit-for-iphone http://code.google.com/intl/ro-RO/mobile/articles/fast_buttons.html

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• How to deal with multiple screensizes + dynamic controls in Android?

  - by chobo2

  Hi I am learning how to program on Android phone. However I am unsure how to make my application work for the different screen sizes and resolutions. I read the tutorial on the android site and still unsure how to do it. First I know there are different files so could make a layout for each of the sizes but my problem is most of the screen needs to be dynamically created so there would not be much to put in these files. So I am not sure how to android to re size dynamic controls based on the screen size. I have also read it is bad practice to make controls in anything but the xml file as it separates view logic and programming logic. However they never talk about if you need to make these controls dynamically what you should do. So is there some other way to do it that is considered good practice?

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• What is "Android Activity", what is the difference between "BlankActivity", and "MasterDetailFlow"?

  - by Adrianus Hendry

  I want to create an android application using Eclipse Juno, but then i am getting confused of what the "activity" actually is. The first time i created android app project, there was an option that require me to select whether i want to create activity, and if so, i need to choose between BlankActivity and MasterDetailFlow. Also, is it possible that an application has many activities? I think i need some tutorials about creating android application using eclipse, so if you have a good tuts either it is in text or videos i will appreciate it. Actually i am a newbie in mobile apps development, so i wish the answer will be less complex. Thanks in advance.

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• How can data not stored in a DB be accessed from any activity in Android?

  - by jul

  hi, I'm passing data to a ListView to display some restaurant names. Now when clicking on an item I'd like to start another activity to display more restaurant data. I'm not sure about how to do it. Shall I pass all the restaurant data in a bundle through the intent object? Or shall I just pass the restaurant id and get the data in the other activity? In that case, how can I access my restaurantList from the other activity? In any case, how can I get data from the restaurant I clicked on (the view only contains the name)? Any help, pointers welcome! Thanks Jul ListView lv= (ListView)findViewById(R.id.listview); lv.setAdapter( new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,restaurantList.getRestaurantNames())); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent i = new Intent(Atable.this, RestaurantEdit.class); Bundle b = new Bundle(); //b.putInt("id", ? ); startActivityForResult(i, ACTIVITY_EDIT); } }); RestaurantList.java package org.digitalfarm.atable; import java.util.ArrayList; import java.util.List; public class RestaurantList { private List<Restaurant> restaurants = new ArrayList<Restaurant>(); public List<Restaurant> getRestaurants() { return this.restaurants; } public void setRestaurants(List<Restaurant> restaurants) { this.restaurants = restaurants; } public List<String> getRestaurantNames() { List<String> restaurantNames = new ArrayList<String>(); for (int i=0; i<this.restaurants.size(); i++) { restaurantNames.add(this.restaurants.get(i).getName()); } return restaurantNames; } } Restaurant.java package org.digitalfarm.atable; public class Restaurant { private int id; private String name; private float latitude; private float longitude; public int getId() { return this.id; } public void setId(int id) { this.id = id; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public float getLatitude() { return this.latitude; } public void setLatitude(float latitude) { this.latitude = latitude; } public float getLongitude() { return this.longitude; } public void setLongitude(float longitude) { this.longitude = longitude; } }

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• What are the minimum hardware requirements for the latest version of Android Jelly Bean OS?

  - by Stom

  I searched around, and there's no information that points exactly to the suggested, minimum, or otherwise dated information containing specifications on this. I want to install a newer version of Android on an older ZTE-X500 MetroPCS smartphone. However, I'd like to know the backwards compatibility in regards to using a newer featured OS with lackluster, limited hardware compared to today's smartphones, such as Galaxy S4. However, I still wish to do this. If Jelly Bean is too demanding, I will set up Honeycomb, or get a modified Honey Comb ROM, or tweak the source to my preferences. However, nothing outlines the specifics of the "system requirements" it suggests for optimum performance, such as RAM, processor speed, processor features, and/or any other features, like DMA, video circuit advancements, and/or sound and special hardware requirements noted as well. Please, if you will, point me to a source that mentions this, and please tell do not link me to any PDF file formats. Thank you. PS: I'm a computer programmer.

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• How can I access shared XP files over wifi with an Archos 5 Internet Tablet with Android?

  - by Fred

  I have an Archos 5 Internet tablet with Android. I have been using it to stream video over my XP wifi network. Yesterday the Archos stopped seeing any of my computers. I have found some programs that allow me to see the network, so I know the hardware works. However, this program does not allow me to pick the correct program to play the files I want. I suspect the problem lies somewhere on the XP side. This would probably work better if the Archos 5 allowed me to manually input the IP address. Help?

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• How can I access shared XP files over wifi with an Archos 5 Internet Tablet with Android?

  - by Fred

  I have an Archos 5 Internet tablet with Android. I have been using it to stream video over my XP wifi network. Yesterday the Archos stopped seeing any of my computers. I have found some programs that allow me to see the network, so I know the hardware works. However, this program does not allow me to pick the correct program to play the files I want. I suspect the problem lies somewhere on the XP side. This would probably work better if the Archos 5 allowed me to manually input the IP address. Help?

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• How to reset Nexus One to Android 2.2.1 or 2.3?

  - by jblocksom

  I have a Nexus One (with the radios for the AT&T network) which has an old beta version of 2.2 on it. It doesn't receive over the air updates, and I'd like to get it running something more recent. Where can I find a download for Android 2.2.1 or 2.3? There's a link to an updater on Google's site that's given by numerous blogs but it's always broken. It's kind of bizarre to me that this phone is stuck in an OS limbo since it won't receive updates and there's no place to download the latest.

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• How to connect Android phone to a Wifi network using PPPoE?

  - by Slavo

  I have an ISP at home, which provides me with a PPPoE connection. My router supports that and I've configured it to autoconnect periodically, so I don't have to type my username and password each time. When I connect to the Wireless router from the PC, I have internet and everything works fine. However, when I do so using my Android phone, there's no internet connection on the phone. It connects to the router, but I cannot open any web page. How can I enable internet access from such an ISP on my phone? Is it something in the router setup? The router is Linksys WRT54GL.

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• Best way/format to convert a PDF to be able to read on android?

  - by stirredo

  I have a pdf ebook, a Technical book that conatins a lot of code. Reading it as pdf is slow plus reflowing text in the pdf reader removes all the formatting. I tried converting it to epub using calibre but that too removes all the formatting. The only pleasant experience I have had reading a technical book on my phone is as chm but I can't find anything to convert pdf to chm(Found a couple of softwares but that didn't do a good job). Has anyone had successfully experience in reading a technical pdf ebook on a android phone?

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• How do I connect a laptop running Windows 7 to an Android phone using WiFi Direct?

  - by user130768

  From where I am sitting, Windows 7 does not appear to support WiFi Direct connections to Android mobile devices. Specifically, turning on WiFi Direct on my Samsung Galaxy S II does not make the device visible as a potential WiFi network connection. Windows 8 is said to support WiFi Direct, but I have no desire to upgrade at this time. I have successfully set up ad hoc WiFi connections between the S II and my laptop before, but as you may be aware, these are not the same as WiFi Direct. Before posting this question, I searched [ "Windows 7" "WiFi Direct" ] and variations thereof, and dutifully slogged through dozens of lame or irrelevant responses on various forums, badly made YouTube videos, and probable Trojan horse distribution sites. If someone out there knows how to do this, it's buried in the noise.

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• How to install ubuntu OS using an android mobile as a usb drive?

  - by Rochelle Canale

  I just want to ask if How can I install Ubuntu OS from android phone? I have the ubuntu.img and .md5 file. But I don't knwo how to run this. I also have Linux installer and VNC. Everytime I launch the application the terminal emulator always force close. So I think that there's an error with the application. Any idea how can I install this? I am using myphone A848 duo same as Noir A6 and micromax A68.

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• Android : How to open youtube links on my facebook messenger app, in the youtube app? [migrated]

  - by dev_android

  I am unable to play YouTube videos from the links I get on my Facebook Messenger app. Here's what happens: A friend of mine posts a video link to me (YouTube link) as a message on Facebook. I receive it on my Android mobile in the Facebook messenger app. I click on it and it shows a Dialogue-Box (you can call that a pop-up) which asks me to choose an app to open the video with. Now earlier, there used to be the video player apps in my mobile along with the internet browsers installed on my mobile that used to come up there. So I would select an internet browser, and it in turn would re-direct me to the "YouTube" app itself. However, now, I am only getting video-players in that Dialogue Box as an option to open the YouTube video, but of course, if I select them, they are not able to stream the video. Has anyone found a way around this problem? It is really bothersome.

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• Run shell script on Linux box from a shortcut/app in Android?

  - by melat0nin

  I have an Ubuntu box which runs XBMC, which crashes occasionally. Since I have no keyboard connected,I have to SSH in, kill xinit, then restart it. I was wondering if there's an elegant way of doing this from my Android tablet, so I don't have to go to my desktop PC. I've used ConnectBot and can log in, but typing is laborious, even using the edit keys to scroll back up through the buffer. It seems as though it should be possible to script this so that I can execute a shortcut, or at least select a predefined script to be executed. This would seem to have plenty of applications, and there could be a site of scripts - restart webserver, reboot, email logs etc

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• How can I read data from a generated pointcloud, but from an other perspective of the camera? [migrated]

  - by Vlad Lata

  Basically what I'm trying to do is as follows: I have a software that generates and shows a pointcloud by analyzing Time-of-Flight data (Z-Data). This software has a GUI that delivers this pointcloud on a grid, and you can watch it and adjust the camera to change the perspective, or apply filtering to it and so on. Since the Z-data was recorder through a stereoscopic system, I want to obtain a perspective transformation. My idea was to simply change the position of the camera in the GUI and than add a button that sais (ex. New Perspective) that calls a function that would measure the distances from the existing pointcloud to the camera I'm viewing it from. Of course this would generate some occluded areas, but I want this to happen. And now the main question is: How can I do that? Are there any functions in OpenGL that measure the distance from an object to a camera, or is it even possible to do something like his? Or has someone some other idea? P.S. The software uses the qt sdk and opengl

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• iOS 5: Enable Android Style Auto Correction Feature With A Simple Trick

  - by Gopinath

  Apple generally don’t let its users to play with their devices, but seems to be these days there are few things slipping through the nets. Smart users are able find some hacks and enable new features on iOS devices! Few days ago we heard about the hidden panorama feature built into iOS 5 and it could be enabled on a jail broken device. Here come another hidden feature unearthed by a smart geek in iOS 5 : enable Android style auto-correction on on-screen keyboard. Luckily to enable this feature you don’t need to jailbreak, all you need to do is to take backup of your device, edit a file and restore it back. Boom!  That’s it. To enable auto corrections feature on the on-screen keyboard of iOS 5 follow these steps Download iBackupBot and install it on your machine. It’s works on both Windows and Mac OS X. Backup your iPhone, iPod, or iPad with iTunes – plug in your iOS device and sync it. Open iBackupBot, locate your most recent backup and click on it Scroll down to Library/Preferences/com.apple.keyboard.plist and double-click on it.   Replace everything between the two <dict> with the following <key>KeyboardAutocorrectionLists</key> <string>YES</string> Save the plist file, then hit the "Restore From Backup" button in iBackupbot. Reboot your device to see the auto correction feature in action on your device’s on-screen keyboard. via lifehacker This article titled,iOS 5: Enable Android Style Auto Correction Feature With A Simple Trick, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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