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  • how to implement chating applicaiton in android

    - by Aswan
    i am developing one chat form in my apps displying the chats i was taken linear laout but i need to refresh that chat msg every 5 seconds for that i am using timer.while dynamically adding it is showing getting values from db and add to layout but in gui i am not able to get those messages for that what i have to do. is there any way for chat application refreshing page .how to update the values to layout in android .pl it's very urgent to me Thanks in advance Aswan

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  • Access Android 1.5 browser's gears-created database localy

    - by Sirber
    I created a database via javascript using Google Gears on Android 1.5 and I'd like to access directy the sqlite file to look inside it whitout using Gears. I found several "File Browser" but they only browse the SD card. Is there a way to fetch it from the phone file system? I have an HTC Dream running Androis 1.5. Thank you!

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  • calling startActivity() inside of a instance method - causing a NullPointerException

    - by Cole
    Heya - I'm trying to call startActivity() from a class that extends AsyncTask in the onPostExecute(). Here's the flow: Class that extends AsyncTask: protected void onPostExecute() { Login login = new Login(); login.pushCreateNewOrChooseExistingFormActivity(); } Class that extends Activity: public void pushCreateNewOrChooseExistingFormActivity() { // start the CreateNewOrChooseExistingForm Activity Intent intent = new Intent(Intent.ACTION_VIEW); **ERROR_HERE*** intent.setClassName(this, CreateNewOrChooseExistingForm.class.getName()); startActivity(intent); } And I get this error… every time: 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): FATAL EXCEPTION: main 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): java.lang.NullPointerException 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): at android.content.ContextWrapper.getPackageName(ContextWrapper.java:120) 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): at android.content.ComponentName.(ComponentName.java:62) 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): at android.content.Intent.setClassName(Intent.java:4850) 03-17 16:04:29.579: ERROR/AndroidRuntime(1503): at com.att.AppName.Login.pushCreateNewOrChooseExistingFormActivity(Login.java:47) For iOS developers - I'm just trying to push a new view controller on to a navigational controller's stack a la pushViewController:animated:. Which apparently - is hard to do on this platform. Any ideas? Thanks in advance! UPDATE - FIXED: per @Falmarri advice, i managed to resolve this issue. first of all, i'm no longer calling Login login = new Login(); to create a new login object. bad. bad. bad. no cookie. instead, when preparing to call .execute(), this tutorial suggests passing the applicationContext to the class the executes the AsyncTask, for my purposes, as shown below: CallWebServiceTask task = new CallWebServiceTask(); // pass the login object to the task task.applicationContext = login; // execute the task in the background, passing the required params task.execute(login); now, in onPostExecute(), i can get to my Login objects methods like so: ((Login) applicationContext).pushCreateNewOrChooseExistingFormActivity(); ((Login) applicationContext).showLoginFailedAlert(result.get("httpResponseCode").toString()); ... hope this helps someone else out there! especially iOS developers transistioning over to Android...

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  • Display different layout according to Facebook connection status in Android

    - by Rom Freiman
    I'm building an Android application where I want users to connect by their facebook details. According to my design, when the application starts first time, I want to display a layout with LOGIN facebook button. After the user will perform login for the first time, I dont want to display this layout/activity again - when the application would be relanched, I want t display another (home) screen, and not the LOGIN one. How should I implement this functionality? Thanks

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  • UI Design Tips and Tutorials for Android

    - by Omega
    Does anyone have any good pointers on designing the UI for an android application and some good practises? Obviously I'm aware of the basic principles involved with designing the layout in XML. Also, that you have a stack of activities. But I'm interested in some approaches to creating the interfaces and also how to design an application around those intentions.

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  • focus not going to another button in android

    - by Rajendar
    Hi, I wrote a code for pinging of given URL.It works fine for me.But whenever i clicked on the start ping button, pinging started but that time focus always is on start button and no widget of the screen working that time. After pressing many times it will gives the force close error.If iam giving URL which is not pinging then that time , all the widgets are working fine.After some time i need to stop the pinging by using my stop button.But it is not working.Please give me advise.Iam using Runtime.exec() for ping command in my android.Plz give me advise.

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  • android activity can't recover

    - by Admin
    When I click my app's icon on the desktop,the splashactivity will first run, then it start the loginactivity before it finished. I click the loginbutton to login.the I came to the mainactivity.Then I click the HomeKey to goto the Android Home. At this time ,I click the app's icon again, the splashactivity start firstly. Why the mainactivity can't be recover? Othewirse,when I click the HomeKey at loginactivity ,the app can skip the splashactivity and recover the loginactivity.Thanks.

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  • Where to start to learn Android?

    - by Tuffy G
    I want to start making a program for a local charity on the Android platform. Where can go I for resources and tutorials to learn? I'm very new at this, so would like something simple that can be followed by someone with minimal technical knowledge.

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  • android 2.2 browser dont work pageY or PageX in ontouchend event

    - by juanca
    I have a web app that work perfect in android 2.1, when I upgrade to 2.2 the pageX property in ontouchend event, this is my code: menu1.ontouchend = function(e){ e.preventDefault(); if (e.touches && e.touches.length0) { // iPhone x2 = e.touches[0].pageX; y2 = e.touches[0].pageY; } else { // all others x2 = e.pageX; y2 = e.pageY; } } Anybody know what change in the javascript API for touch events from 2.1 to 2.2?????

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  • Android - viewing SQLite databases on device?

    - by kape123
    Is there any tool that will allow me to browse databases on my Android device? Something like Sql Management Studio - you know GUI tool that displays databases, tables, row in tables, etc. I'm using Eclipse for development (if it is important for plug-in suggestions). Thanks!

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  • Android full Screen flag gives an exception

    - by sukitha
    In my android app I set this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN ); Then my touch screen event doesnt’ work any more. Further Explaining, I have a button and onClick it changes the contentView by setContentView(R.layout.choose_player);. It works fine. But if you take the focus to the button by the trackball(making it yellow) and tap on it, it gives the exception. java.lang.IllegalArgumentException: parameter must be a descendant of this view

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  • back button is working on emulator but it is not working in device in android

    - by Rajeevgandhi
    Hi all, am new to this android development. I have index page and am displaying every links in the same page using div concept. Now i want to use the back button for my application i have developed code to handle the div and it is working in the AVD(Andriod Virtual Device 5556) but if i upload the apk into my device it is not working. Am waiting for your reply Please help me...... Thanks, Rajeevgandhi. S

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  • Android Thumbnail Loading Problem

    - by y ramesh rao
    I'm using a thumbnail loader in my project the one mentioned below. The problem is that the it loads all the thumbnails properly except the ones who's size is of about 40K. When our back end is giving that sort of thumbnails are not generated and sometimes this eventually leads to a Crash too. What m I supposed to do with this ? public class ThumbnailManager { private final Map<String, Bitmap> drawableMap; public static Context context; private Resources res; private int thumbnail_size; public ThumbnailManager() { drawableMap = new HashMap<String, Bitmap >(); res = new Resources(context.getAssets(), null, null); thumbnail_size = res.getInteger(R.ThumbnailManager.THUMBNAIL_SIZE); } public Bitmap fetchBitmap(String urlString) { if(drawableMap.containsKey(urlString)) { return (drawableMap.get(urlString)); } //Log.d(getClass().getSimpleName(), " Image URL :: "+ urlString); try { InputStream is = fetch(urlString); android.util.Log.v("ThumbnailManager", "ThumbnailManager " + urlString); drawableMap.put(urlString, BitmapFactory.decodeStream(is));//Bitmap.createScaledBitmap(BitmapFactory.decodeStream(is), thumbnail_size, thumbnail_size, false)); return drawableMap.get(urlString); } catch(Exception e) { android.util.Log.v("EXCEPTION", "EXCEPTION" + urlString); return null; } } public void fetchBitmapOnThread(final String urlString, final ImageView imageView) { if(drawableMap.containsKey(urlString)) { imageView.setImageBitmap(drawableMap.get(urlString)); return; } if(urlString.compareTo("AUDIO") == 0) { Bitmap audioThumb = BitmapFactory.decodeResource(context.getResources(), R.drawable.timeline_audio_thumb); drawableMap.put(urlString, Bitmap.createScaledBitmap(audioThumb, thumbnail_size, thumbnail_size, false)); imageView.setImageBitmap(drawableMap.get(urlString)); return; } final Handler handler = new Handler() { public void handleMessage(Message message) { imageView.setImageBitmap((Bitmap) message.obj); } }; Thread thread = new Thread() { public void run() { Bitmap urlBitmap = fetchBitmap(urlString); Message message = handler.obtainMessage(1, urlBitmap); handler.sendMessage(message); } }; thread.start(); } public InputStream fetch(String urlString) throws IOException, MalformedURLException { final URL url = new URL(urlString); final URLConnection conn = url.openConnection(); HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction(true); httpConn.setInstanceFollowRedirects(true); httpConn.setRequestMethod("GET"); httpConn.connect(); return(conn.getInputStream()); } }

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