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• How to use startMethodTracing APIs on Android?

  - by Rajorshi

  I have recently started working on an app which has both Java and native components. I am trying to generate trace information for both components using Debug.startMethodTracing("myapp") and Debug.startNativeTracing() alternately. However, both are behaving unexpectedly. When I use Debug.startMethodTracing("myapp"), I can see a file /sdcard/myapp.trace being created but it is always empty no matter how long I run my app. When I use Debug.startNativeTracing() and start the emulator with the -trace <tracename> switch, I see a message saying "Trace started", but when I try to run my app, the emulator crashes. Am I missing something obvious here? How do I debug this problem?

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• Can not access android /data folder?

  - by fonter

  try { Runtime rt = Runtime.getRuntime(); Process pcs = rt.exec("ls -l /data"); BufferedReader br = new BufferedReader(new InputStreamReader(pcs .getInputStream())); String line = null; while ((line = br.readLine()) != null) { Log.e("line","line="+line); } br.close(); pcs.waitFor(); int ret = pcs.exitValue(); Log.e("ret","ret="+ret); } catch (Exception e) { Log.e("Exception", "Exception", e); } only print "ret=0",How to print the correct path?

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• android: turn off screen when close to face

  - by mtmurdock

  My app allows the user to access their corporate voice mail. Normally, durring a phone call when the user holds the device up to their ear, the screen shuts off so they wont accidentally push buttons with their face. I would like to make my app do the same thing when the user is listening to their voice mail. anyone know how to do this?

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• Android Layout question

  - by Nils

  Hello, I need to create a map with items on it (the map consists of a drawable object, which represents a room) and I thought about using buttons with background images for the items so that they are clickable. I guess the AbsoluteLayout fits here the best, but unfortunately it's deprecated. What layout would you recommend me for this kind of application ? Is there another layout which supports X/Y coordinates ?

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• Storing float numbers as strings in android database

  - by sandis

  So I have an app where I put arbitrary strings in a database and later extract them like this: Cursor DBresult = myDatabase.query(false, Constant.DATABASE_NOTES_TABLE_NAME, new String[] {"myStuff"}, where, null, null, null, null, null); DBresult.getString(0); This works fine in all cases except for when the string looks like a float number, for example "221.123123123". After saving it to the database I can extract the database to my computer and look inside it with a DB-viewer, and the saved number is correct. However, when using cursor.getString() the string "221.123" is returned. I cant for the life of me understand how I can prevent this. I guess I could do a cursor.getDouble() on every single string to see if this gives a better result, but that feels sooo ugly and inefficient. Any suggestions? Cheers, edit: I just made a small test program. This program prints "result: 123.123", when I would like it to print "result: 123.123123123" SQLiteDatabase database = openOrCreateDatabase("databas", Context.MODE_PRIVATE, null); database.execSQL("create table if not exists tabell (nyckel string primary key);"); ContentValues value = new ContentValues(); value.put("nyckel", "123.123123123"); database.insert("tabell", null, value); Cursor result = database.query("tabell", new String[]{"nyckel"}, null, null, null, null, null); result.moveToFirst(); Log.d("TAG","result: " + result.getString(0));

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• Android - overlay small check icon over specific image in gridview or change border

  - by oscar

  I've just asked a question about an hour ago, while waiting for replies, I've thought maybe I can achieve what I want differently. I was thinking of changing the image but it would be better if I could perhaps overlay something over the top of complete levels in the gridview i.e a small tick icon At the moment, when a level has been completed I am storing that with sharedpreferences So I have a gridView layout to display images that represent levels. Let's just say for this example I have 20 levels. When one level is complete is it possible to overlay the tick icon or somehow highlight the level image. Maybe change the border of the image?? Here are the image arrays I use int[] imageIDs = { R.drawable.one, R.drawable.two, R.drawable.three, R.drawable.four, R.drawable.five, R.drawable.six etc....... and then I have my code to set the images in gridView. Obviously there is more code in between. public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView; if (convertView == null) { imageView = new ImageView(context); imageView.setLayoutParams(new GridView.LayoutParams(140, 140)); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(5, 5, 5, 5); } else { imageView = (ImageView) convertView; } imageView.setImageResource(imageIDs[position]); return imageView; would it be possible to do any of the above, even the border method would be fine. Thanks for any help

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• startActivityResult Problem in Android?

  - by Praveen Chandrasekaran

  How to do the startActivityResult() for the Quick Search Box? that is if i click a button in my activity. it should wake up the QSB and search. i click the suggestion button. it will return the string which is shown as a suggestion. how to do it? which intent action i have to use and how ? Any Idea?

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• Starting an Intent to Launch an app to Background in Android

  - by Tista

  Hi all, I'm using Wikitude API 1.1 as an AR viewer in my application. The problem with Wikitude, if I haven't launched the actual Wikitude application since the phone's bootup, I will get a NullPointerException everytime I start my own application. So I figure if I can start my app first and them check if Wikitude is installed and or running. If it's not installed, go to market n download. If it's not running, then we should run it straight to background so that my app doesn't loose its focus. // Workaround for Wikitude this.WIKITUDE_PACKAGE_NAME = "com.wikitude"; PackageManager pacMan = Poligamy.this.getPackageManager(); try { PackageInfo pacInfo = pacMan.getPackageInfo(this.WIKITUDE_PACKAGE_NAME, pacMan.GET_SERVICES); Log.i("CheckWKTD", "Wikitude is Installed"); ActivityManager aMan = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE); List<RunningAppProcessInfo> runningApps = aMan.getRunningAppProcesses(); int numberOfApps = runningApps.size(); for(int i=0; i<numberOfApps; i++) { if(runningApps.get(i).processName.equals(this.WIKITUDE_PACKAGE_NAME)) { this.WIKITUDE_RUNNING = 1; Log.i("CheckWKTD", "Wikitude is Running"); } } if(this.WIKITUDE_RUNNING == 0) { Log.i("CheckWKTD", "Wikitude is NOT Running"); /*final Intent wIntent = new Intent(Intent.ACTION_MAIN, null); wIntent.addCategory(Intent.CATEGORY_LAUNCHER); final ComponentName cn = new ComponentName("com.wikitude", "com.mobilizy.wikitudepremium.initial.Splash"); wIntent.setComponent(cn); wIntent.setFlags(Intent.FLAG_ACTIVITY_NO_USER_ACTION); startActivityIfNeeded(wIntent, 0);*/ } } catch (NameNotFoundException e) { // TODO Auto-generated catch block Log.i("CheckWKTD", "Wikitude is NOT Installed"); e.printStackTrace(); //finish(); } The part I block commented is the intent to start Wikitude. But I always failed in restricting Wikitude to background. Any help? Thanks before. Best, Tista

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• Android: Quitting the Looper?

  - by stormin986

  I have a thread I use to periodically update the data in my Activity. I create the thread and start a looper for using a handler with postDelay(). In onDestroy() for my activity, I call removeCallbacks() on my handler. Should I then call handler.getLooper().quit()? Or not worry about it and let the OS deal with it? Or would it just run forever then, consuming CPU cycles?

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• android:black screen switching between activity

  - by 100rabh

  Hi, I am using below code from one of my activity to start another Intent viewIntent = new Intent (getApplicationContext (), landingPage.class); Bundle b = new Bundle (); b.putString ("ApplicationName", a_Bean.getApplicationName ()); if (landingPage.getInstanceCount () < 1) bp.landingPage_ProgressDialog = ProgressDialog.show (ViewAllApp.this, "Please wait...", "Retrieving data...", true, false); viewIntent.putExtras (b); viewIntent.addFlags (Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivityForResult (viewIntent,10); Thread background=new Thread(new Runnable() { public void run() { Progresshandler.sendMessage(handler.obtainMessage());//finishes progressDialog }}); background.start (); but after startactivity it shows a black screen & then displays new activity. Can I make progressdialog to be shown while the black screen is displayed??

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• avoid preselection of a view when focus is gained android

  - by Sephy

  Hi all, I don't know if the title is very clear, but my issue is as follows : I have an activity with a listview, and on top of this listview, i have a searchfield (edittext). The issue is that when i try debugging on a phone, the virtual keyboard gets out straight after the screen displays the activity... And of course, it's hidding half of the list... So, is there an attribute or something I can use to prevent this from happening?(I still want to keybord to appear when i click the edittext though...) thank you

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• manually put files to android emulator sd card

  - by poeschlorn

  Hi guys, I'm just having trouble with getting my emulator SD card work... I created a new AVD device with a new SD card. So how to put data onto it? I found the "correct" file to be mountet on Deamon tools, but is currupt or simply not readable... It would be great if you have any idea :)

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• How to change size of Android ScrollView

  - by user611923

  I have a layout like this (abstracted): Scrollview - fill_parent LinearLayout - wrap_content ImageView 1 - wrap_content ImageView 2 - ... ImageView 3 ... In the course of user interaction some images are replaced by larger or smaller ones, shortening or lenghtening the area to be scrolled. And that is the problem. The Scrollview (SV) does not know about the change, so either it scrolls over a lot of empty space at the bottom, or cuts off a picture or two at the bottom. Question 1: Can I somehow make the SV readapt to the changed hight of the LiearLayout (LL)? Question 2: I can obtain the current size through getHight on the LL. But supplyong it to the SV via changed LayoutParams does not work - of course, that would only change the height of the SV on the screen. Is there a way to put the changed height of the LL into the SV in the code, somehow? Question 3: I havn't tried it yet. Would creating the SV, LL and its children in code and then adding/removing children of changed size as required, make the SV adapt to the changes? And last question: Is there a better aüpproach, except using ListViews?

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• Loopj Android Async Http - onFailure not fired

  - by Ashley Staggs

  I am using the great async http library from loopj, but I have run into a small snag. If the user has no internet connection or loses their connection, the app just won't return anything. This part is expected, but it also doesn't fire the onFailure method. Also, the code I have used when there is an internet connection does work so there is no problem on the server end. Here is some code that is stripped down to the minimum. It also doesn't work (I have tested this too) String url = getString(R.string.baseurl) + "/appconnect.php"; client.getHttpClient().getParams().setParameter(ClientPNames.ALLOW_CIRCULAR_REDIRECTS, true); client.get(url, null, new JsonHttpResponseHandler() { @Override public void onSuccess(JSONArray response) { Toast.makeText(getApplicationContext(), "Success", Toast.LENGTH_SHORT).show(); } @Override public void onFailure(Throwable e, JSONArray errorResponse) { Toast.makeText(getApplicationContext(), "Failure", Toast.LENGTH_SHORT).show(); } }); Thanks, Ashley

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• Is there a way to parse XML via SAX/DOM with line numbers available per node.

  - by Chris

  I already have written a DOM parser for a large XML document format that contains a number of items that can be used to automatically generate Java code. This is limited to small expressions that are then merged into a dynamically generated Java source file. So far - so good. Everything works. BUT - I wish to be able to embed the line number of the XML node where the Java code was included from (so that if the configuration contains uncompilable code, each method will have a pointer to the source XML document and the line number for ease of debugging). I don't require the line number at parse-time and I don't need to validate the XML Source Document and throw an error at a particular line number. I need to be able to access the line number for each node and attribute in my DOM or per SAX event. Any suggestions on how I might be able to achieve this? P.S. Also, I read the StAX has a method to obtain line number whilst parsing, but ideally I would like to achieve the same result with regular SAX/DOM processing in Java 4/5 rather than become a Java 6+ application or take on extra .jar files.

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• SHA-256 encryption wrong result in Android

  - by user642966

  I am trying to encrypt 12345 using 1111 as salt using SHA-256 encoding and the answer I get is: 010def5ed854d162aa19309479f3ca44dc7563232ff072d1c87bd85943d0e930 which is not same as the value returned by this site: http://hash.online-convert.com/sha256-generator Here's the code snippet: public String getHashValue(String entity, String salt){ byte[] hashValue = null; try { MessageDigest digest = MessageDigest.getInstance("SHA-256"); digest.update(entity.getBytes("UTF-8")); digest.update(salt.getBytes("UTF-8")); hashValue = digest.digest(); } catch (NoSuchAlgorithmException e) { Log.i(TAG, "Exception "+e.getMessage()); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } return BasicUtil.byteArrayToHexString(hashValue); } I have verified my printing method with a sample from SO and result is fine. Can someone tell me what's wrong here? And just to clarify - when I encrypt same value & salt in iOS code, the returned value is same as the value given by the converting site.

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• Assigning ID to a Row in an Android ListView

  - by Chris

  I have a ListView. When an item on the ListView is tapped, it loads a SubView. I want to assign an ID to each row of the ListView, so I can pass that ID along to the SubView. How do I assign a specific ID to each row in the ListView? Here is how I am currently loading the ListView: setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, mArrayList));

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• Couldn't copy package file to temp file in android

  - by Siva K

  hi i created a new app, whenever i try to run in my device it shows as [2011-02-17 18:57:09 - SpeedApp02] Installation error: INSTALL_FAILED_MEDIA_UNAVAILABLE [2011-02-17 18:57:09 - SpeedApp02] Please check logcat output for more details. [2011-02-17 18:57:10 - SpeedApp02] Launch canceled! in the console and 02-17 18:58:58.540: ERROR/PackageManager(59): Couldn't copy package file to temp file. in the logcat. What it means? what is the problem. This is the same with emulator too....

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• Using a Context Menu to delete from a SQLite database in Android

  - by LordSnoutimus

  Hi, I have created a list view that displays the names and dates of items stored in a SQLite database, now I want to use a Context Menu to modify these items stored in the database such as edit the name, delete, and view. This is the code for the list view: public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.listview); SQLiteDatabase myDB = null; myDB = this.openOrCreateDatabase(MY_DB_NAME, MODE_PRIVATE, null); Cursor cur = myDB.rawQuery("SELECT _id, trackname, tracktime" + " FROM " + MY_DB_TABLE, null); ListAdapter adapter = new SimpleCursorAdapter(this, R.layout.listview, cur, new String[] { Constants.TRACK_NAME, Constants.TRACK_TIME}, new int[] { R.id.text1, R.id.text2}); ListView list = (ListView)findViewById(R.id.list); list.setAdapter(adapter); registerForContextMenu(list); } and the Context Menu... public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); menu.setHeaderTitle("Track Options"); menu.add(0, CHANGE_NAME, 0, "Change name"); menu.add(0, VIEW_TRACK, 0, "View track"); menu.add(0, SEND_TRACK, 0, "Send track"); menu.add(0, DELETE_TRACK, 0, "Delete track"); } I have used a Switch statement to control the menu items.. public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()){ case CHANGE_NAME: changename(); return true; case DELETE_TRACK: deletetrack(); return true; default: return super.onContextItemSelected(item); } So how would I go ahead and map the deletetrack(); method to find the ID of the track stored in the database to the item that has been selected in the list view?

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• Android Chronometer disapears when started ?

  - by Mina Samy

  Hi all The Chronometer widget initial text is 00:00 but when I start the Chronometer its text becomes blank How can I display the text of the Chronometer as it cunts up ? thanks.

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• Android Application has stopped Unexpectedly

  - by Chris Stryker

  My application Worldly Is having an error and I can't run it through an emulator for a log can somebody try it and send back results and ideas

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• Android ListActivity with Bitmaps and Garbage Collection issue

  - by chis54

  I have a ListActivity and in it I set my list items with a class that extends SimpleCursorAdapter. I'm overriding bindView to set my Views. I have some TextViews and ImageViews. This is how I set my list items in my cursor adapter: String variableName = "drawable/q" + num + "_200px"; int imageResource = context.getResources().getIdentifier(variableName, "drawable", context.getPackageName()); if (imageResource != 0 ) { // The drawable exists Bitmap b = BitmapFactory.decodeResource(context.getResources(), imageResource); width = b.getWidth(); height = b.getHeight(); imageView.getLayoutParams().width = (int) (width); imageView.getLayoutParams().height = (int) (height); imageView.setImageResource(imageResource); } else { imageView.setImageResource(R.drawable.25trans_200px); } The problem I'm having is whenever I update my list with setListAdapter I get a large amount of garbage collection: D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 125K, 51% free 2710K/5447K, external 2022K/2137K, paused 75ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 30K, 51% free 2701K/5447K, external 2669K/2972K, paused 64ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 23K, 51% free 2713K/5447K, external 3479K/3579K, paused 53ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 22K, 51% free 2706K/5447K, external 3303K/3352K, paused 64ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 21K, 51% free 2722K/5447K, external 3569K/3685K, paused 102ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 23K, 50% free 2755K/5447K, external 3499K/3605K, paused 65ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 23K, 50% free 2771K/5447K, external 4213K/4488K, paused 53ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 18K, 49% free 2796K/5447K, external 5057K/5343K, paused 75ms D/dalvikvm(18637): GC_EXTERNAL_ALLOC freed 28K, 49% free 2803K/5447K, external 5944K/5976K, paused 53ms D/dalvikvm( 435): GC_EXPLICIT freed 6K, 54% free 2544K/5511K, external 1625K/2137K, paused 50ms D/dalvikvm( 165): GC_EXPLICIT freed 85K, 52% free 2946K/6087K, external 4838K/5980K, paused 111ms D/dalvikvm( 448): GC_EXPLICIT freed 1K, 54% free 2540K/5511K, external 1625K/2137K, paused 50ms D/dalvikvm( 294): GC_EXPLICIT freed 8K, 55% free 2598K/5703K, external 1625K/2137K, paused 64ms What can I do to avoid this? It's causing my UI to be sluggish and when I scroll, too.

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• Javascript and rendering pauses and stays paused on scroll in the android browser

  - by user357303

  Hi. I've found some wierd behaviour related to scrolling and rendering and javascript. How to make it happen: On any webpage that is long enough to scroll on. Start to scroll pretty fast (fling the page). then release the touch. No while the page is still scrolling because of the momentum. Tap the screen to stop the scroll. This make the browser enter a wierd mode. On the nexus one it behaves like this: The updating of what's shown on the screen stops, you can still click on links and the go to where they are supposed to but what's shown on the screen stays the same. If you then scroll the screen a bit the update of the screen kicks in again and what you you where suppsed to see all the time is shown. On all phones with HTC Sense I've tried (Hero, Desire, Legend) this happens: The updating of the screen is stopped just like on the nexus one, but also the execution of any javascript is stopped. If you click on a link that takes you to another page however things return to normal again. The way I tested this was I created a page like this: http://pastebin.ca/1881620 The changeColor function simply changed the background color of 'container' to a few different colors. So before the error what happens is that when you click any link the color changes. after the error this happens: Nexus one: when you click on the links nothing happens (except the "orange link selected rounded corner box thing" is shown as if the link is clicked). Then when you scroll abit. You can see the color has changed (and equal amount of times to the number of times I clicked the link). On Sense: The links take me to google.com Has anyone else noticed this problem? Is there anyway to work around it? Thanks.

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• Android: View.getTag/setTag and IllegalArgumentException

  - by Sparafusile

  Yes, I know you need a unique resource id when calling the version of these functions that requires a key, but I cannot for the life of me figure out how to create a resource id that can be used in this way. A final variable in my class wont work and neither will a hard coded value. Both threw an IllegalArgumentException. So what gives, how do you use these methods? Spara

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• How to generate XML from an Excel VBA macro?

  - by SuperNES

  So, I've got a bunch of content that was delivered to us in the form of Excel spreadsheets. I need to take that content and push it into another system. The other system takes its input from an XML file. I could do all of this by hand (and trust me, management has no problem making me do that!), but I'm hoping there's an easy way to write an Excel macro that would generate the XML I need instead. This seems like a better solution to me, as this is a job that will need to be repeated regularly (we'll be getting a LOT of content in Excel sheets) and it just makes sense to have a batch tool that does it for us. However, I've never experimented with generating XML from Excel spreadsheets before. I have a little VBA knowledge but I'm a newbie to XML. I guess my problem in Googling this is that I don't even know what to Google for. Can anyone give me a little direction to get me started? Does my idea sound like the right way to approach this problem, or am I overlooking something obvious? Thanks StackOverflow!

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