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• PreferenceActivity used as main activity has strange animation

  - by Tobia Loschiavo

  Hi, I have a preference screen (subclass of PreferenceActivity) set as main activity (opened when the application starts). Anyway the animation android uses to open this activity is different from standard activity. It seems that two types of animation run concurrently: the usual fade animation and the right to left one. This is the code of the onCreate() method: getPreferenceManager().setSharedPreferencesName("app"); addPreferencesFromResource(R.xml.preferences); screen = getPreferenceScreen(); How can fix this glitch? Thanks

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• How can I update the version of an APK which I did not create myself

  - by sylvanaar

  I am new to Android development. I am using a x-platform development tool which builds and signs the APK for me. This tool has a bug and it does not generate APK's with the version number I specify, all APK's generated are version 1.0. I would like to unpack the APK, edit the version number, and then resign and repackage it. It was signed using my keystore originally, so I have the keys needed to sign it again. How can this be done?

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• The emulator isn't showing the XML contents

  - by Roni Copul

  I have been reading Google's android tutorial (link added in the first comment) and I got a problem... In the tutorial they explain the XML elements (EditText and Button) and in the end they say how to tun the program to see the button + the text field. The problem is, that the emulator doesn't show them.. just a black screen. I even tried adding this line to the onCreate function - System.out.println("Hello World!"); but still the emulator is showing only black screen.. Here's the .java main file - http://pastebin.com/G5J9YjNe And the XML files (I mentioned what code is what file) - http://pastebin.com/VnRwAfMW What should I do? Thanks a lot for everyone who will help!

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• question about asynchronous http

  - by rantravee

  Hi , I just want to check if I understood well the way asynchronous Http request work on Android. Suppose I make such a request and set a ResponseHandler<String> responseHandler to handle the response. By doing this is it possible to have the UI thread blocked waiting for the response ? The implication being that the code in the function: public String handleResponse(HttpResponse response) is also executed on the UI thread or is there silently spawned a thread that waits for the response and calls the handleResponse(HttpResponse response) function when the response arrives ?

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• Is there a way to animate on a Home Widget?

  - by David

  Hi All, I want to use an animation on a Home page Widget, i.e. an AppWidgetProvider. I was hoping to use the "Frame Animation" technique: http://developer.android.com/guide/topics/graphics/2d-graphics.html#frame-animation which I've used successfully in an activity. But I can't translate that code to an AppWidgetProvider. Basically, in an AppWidgetProvider, I create and work with a RemoteViews object, which AFAIK doesn't provide me with a method to get a reference to an ImageView in the layout for me to call start() on the animation. There is also not a handler or a callback for when the widget displays so I can make the start() call. Is there another way this can be done? I suppose that I can probably do the animation on my own with very fast onUpdate() calls on the widget, but that seems awfully expensive.

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• Blackberry - how to resize image?

  - by Bohemian

  I wanted to know if we can resize an image. Suppose if we want to draw an image of 200x200 actual size with a size of 100 x 100 size on our blackberry screen. Thanks

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• Home key press behaviour

  - by Arnab

  While developing a sample android application i have constructed two activities 1)Activity 1 2)Activity 2 Now Activity 2 is the foreground activity whereas Activity 1 is the background one. Now user presses Home key. The application(i.e. both the activities) dissappear. Now is we relaunch the application we see Activity 1 as the foreground activity. My question is: 1)Does the platform maintain any history entry when pressed home key? 2)How do we take the user to the last launch activity on relaunching the application?

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• Rss Feed for youtube channel?

  - by Praveen Chandrasekaran

  Suggest me to how to get the HD video url for the youtube channel uploads as a RSS Feed. its to play on android phones. the formats should be Format File Type H.263 3GPP (.3gp) and MPEG-4 (.mp4) H.264 AVC 3GPP (.3gp) and MPEG-4 (.mp4) MPEG-4 SP 3GPP (.3gp) if i use this link: http://gdata.youtube.com/feeds/api/users/youtube/uploads i get only the 3gpp format media-content tag? i want high definition mp4 video link. resolution must be 320X480.How can i? Any Idea?

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• Text should wrap if checkbox is selected

  - by Dainel

  i am working with android webview and inside webview i am displaying the webpage which is having css,Javascript so i want that whenever i will select the checkbox and try to zoom the page so it should wrap otherwise it should not. So for that i tried to set the property of css - w.loadUrl("javascript:(function() {" + "document.getElementByTagName('html')[0].style.whiteSpace='nowrap';})"); but i am changing these properties by programming so it is not affecting the text content so please tell me how can i make the webpage text as wrapped if the checkbox is selected and it should not wrap if the checkbox is not selected,so please provide me any suggestion?? Thanks in advance

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• R.java file not updating with UI element's id

  - by Mohit Deshpande

  I added some UI elements to the main.xml file in the res\layout folder and when I try to access them through the call, R.layout.my_uielement, the UI element that I created is not there. Even when I add a new xml file with UI elements, it still doesn't show up in the R.layout class. I have made checked the ids on them and they have the correct format (I think): android:id="@+id/my_button". What could be the problem? Do I need to compile the code first?

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• Play bitmap animation list in reverse order?

  - by Ixx

  I have a bitmap animation defined in XML, to open a door. I also need to animate closing the door, which contains the same frames but in reverse order. I don't want to create a second XML for this. The only reverse parameter I found in the documentation is related with repeating, and this doesn't apply, since I want the opening animation to finish when the door is closed and not continue to closing animation. I also found some threads about using a custom interpolator, but can I use / makes sense with a bitmap animation? How can I play the XML animation in reverse order?

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• Mobile Application Upgrade/Update Framework

  - by sharjeel

  I am developing a few mobile apps for different platforms including Blackberry, Windows Mobile, Android and Symbian S60. I want my mobile apps to have the capability of checking for updates before starting and in case a new version is available, prompt the user to upgrade. Moreover in certain cases (like security patches), the user must be forced to update or the app won't work. Surely I can cook some code to achieve the task but I was wondering if there are already existing framework to serve the purpose so that I don't have to re-invent the wheel and test all over?

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• Rss Feed for HD Video for youtube channel?

  - by Praveen Chandrasekaran

  Suggest me to how to get the HD video url for the youtube channel uploads as a RSS Feed. its to play on android phones. the formats should be Format File Type H.263 3GPP (.3gp) and MPEG-4 (.mp4) H.264 AVC 3GPP (.3gp) and MPEG-4 (.mp4) MPEG-4 SP 3GPP (.3gp) if i use this link: http://gdata.youtube.com/feeds/api/users/youtube/uploads i get only the 3gpp format media-content tag? i want high definition mp4 video link. resolution must be 320X480.How can i? Any Idea?

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• Add String to adapter

  - by Waggoner_Keith

  I have an adapter and i want to add a string to it but when i run this code it only add the last string in the songstoadd variable ... That is a custom adapter which adds dividers in where neccessary but in the Array Adapter i want to a all of the strings that have the same first letter in their name .... SeparatedListAdapter adapter = new SeparatedListAdapter(this); ArrayList<String> songstoadd = new ArrayList<String>(); Collections.sort(songtitle); int m = 0; while( m <songtitle.size()-1){ if(songtitle.get(m).substring(0, 1) == songtitle.get(m+1).substring(0, 1)){ m++; }else{ songstoadd.clear(); songstoadd.add(songtitle.get(m)); adapter.addSection(songtitle.get(m).substring(0, 1), new ArrayAdapter<String>(getApplicationContext(),R.layout.song, songstoadd)); m++; } } setListAdapter(adapter); }

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• Drawing random circles

  - by ViktorC

  I am trying to draw a cupola circles at random positions in an Android application. I draw them on a bitmap and then draw that bitmap on the canvas. This is the function where a draw the circles: private void drawRandomCircles(int numOfCircles) { Canvas c = new Canvas(b); Paint cPaint = new Paint; cPaitn.setColor(Color.RED); for(int i = 0; i < numOfCircles; i++) { int x = Math.Random % 100; int y = Math.Random % 100; c.drawCircle(x, y, 20, cPaint) } } The Bitmap b is global. And after calling this function I just draw the bitmap in the onDraw method. Now the problem is that I only get one circle drawn on the screen, no matter the size of numOfCircles. Any clue what is happening here?

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• Notifying when screen is off

  - by Al

  I'm trying to generate a notification which vibrates the phone and plays a sound when the screen is off (cpu turned off). According to the Log messages, the notification is being sent, but the phone doesn't vibrate or play the sound until I turn the screen on again. I tried holding a 2 second temporary wakelock (PowerManager.PARTIAL_WAKE_LOCK), which I thought would be ample time for the notification to be played, but alas, it still doesn't. Any pointers to get the notification to run reliably? I'm testing this on an G1 running Android 1.6. Code I'm using: notif.vibrate = new long[] {100, 1000}; notif.defaults |= Notification.DEFAULT_SOUND; notif.ledARGB = Color.RED; notif.ledOnMS = 1; notif.ledOffMS = 0; notif.flags = Notification.FLAG_SHOW_LIGHTS; notif.flags |= NOTIF_FLAGS; //static var if (!screenOn) { //var which updates when screen turns off/on mWakeLock.acquire(2000); } manager.notify(NOTIF_ID, notif);

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• How to Form.GetChildSAtPoint?

  - by serhio

  I would like to obtain the list of controls under a given point. There is a method on System.Windows.Form to obtain a control under a point(GetChildAtPoint) but not point(GetChildsAtPoint). Is there something similar for the list of controls (if borders intersect one other): I need this because I select the objects when user clicks on the panel(I use Microsoft.VisualBasic.PowerPacks.RectangleShape as label bellow). In case if labels are superposed, user should be asked what object to select.

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• asp.net Web server control with child controls, event not firing

  - by bleeeah

  I have a simple web control (TaskList) that can have children (Task) which inherit from LinkButton, that can be added declaratively or programatically. This works ok, but I can't get the onclick event of a Task to be fired in my code behind. The code .. [ToolboxData("<{0}:TaskList runat=\"server\"> </{0}:TaskList>")] [ParseChildren(true)] [PersistChildren(false)] public class TaskList : System.Web.UI.Control { //[DefaultProperty("Text")] public TaskList() {} private List<Task> _taskList = new List<Task>(); private string _taskHeading = ""; public string Heading { get { return this._taskHeading; } set { this._taskHeading = value; } } [NotifyParentProperty(true)] [PersistenceMode(PersistenceMode.InnerProperty)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public List<Task> Tasks { get { return this._taskList; } set { this._taskList = value; } } protected override void CreateChildControls() { foreach (Task task in this._taskList) this.Controls.Add(task); base.CreateChildControls(); } protected override void Render(HtmlTextWriter writer) { writer.Write("<h2>" + this._taskHeading + "</h2>"); writer.Write("<div class='tasks_container'>"); writer.Write("<div class='tasks_list'>"); writer.Write("<ul>"); foreach (Task task in this._taskList) { writer.Write("<li>"); task.RenderControl(writer); writer.Write("</li>"); } writer.Write("</ul>"); writer.Write("</div>"); writer.Write("</div>"); } } public class Task : LinkButton { private string _key = ""; public string Key { get { return this._key; } set { this._key = value; } } } Markup: <rf:TaskList runat="server" ID="tskList" Heading="Tasks"> <Tasks> <rf:Task Key="ba" ID="L1" Text="Helllo" OnClick="task1_Click" runat="server" /> </Tasks> </rf:TaskList> The Onclick event task1_Click never fires when clicked (although a postback occurs).

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• camera captured image default rotating with 90 degree angle.

  - by kamiomar

  Dear, currently i am using android Api 4. my camera initializing code is follow: public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { // Now that the size is known, set up the camera parameters and begin // the preview. Parameters parameters = camera.getParameters(); parameters.set("jpeg-quality", 100); parameters.set("orientation", "portrait"); parameters.set("picture-size", "320X430"); parameters.set("rotation", 0); parameters.setPictureFormat(PixelFormat.JPEG); camera.setParameters(parameters); camera.startPreview(); } i set the orientation portrait, camera preview working appropriately. but when i captured the image ,its rotating the image with 90 degree.In the landscape orientation its working perfectly. so how i can capture normal image using portrait orientation. thanks.

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• ClassNotFoundException when transfer data between service and activity

  - by androider

  Hello again, I am writing an application which is composed of an underlying service and a GUI controller. The service collects data and sends to the controller, I used Messenger and put an array of parcelable objects into the bundle of the message. But when it is received at the controller side, error occurs: android.os.BadParcelableException: ClassNotFoundException in unmarshalling MyData ... I am sure that MyData implements correctly Parcelable interface. It seems I have to do something with ClassLoader? or what else? Please help me. Thank you very much!

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• Recording audio from many source/microphones

  - by user657429

  I'm curious if it's possible to record audio from many sources and if not, what's the limitation. Many current devices have two internal microphones (basically for noise reduction). On top of that it's possible to plug additional external one using audiojack. You can as well have another audio stream via bluetooth headset. You are allowed to specify AudioSource in android but is it possible to do recording from many sources at the same time? I'm also interested how the situation look like on the iOS devices.

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• Changing Pushpin Text Color

  - by Yawus

  I'm attempting to display data through the text of a Pushpin object. However, the text color defaults to white which is nigh-invisible when the backdrop is a road-style MapView. Looking through the API, paying especially close attention to PushpinOptions, I couldn't find anything that manipulated text color. Considering that this seems to a fairly basic feature, I'm a little confused as to why it doesn't exist or at least is really hard to find. Am I missing something or does Bing Maps for Android really not let you change the default text color for a Pushpin object?

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• How do you create a Google Maps-esque drop down dialog?

  - by Daniel Lew

  In the Google Maps application, when you open the menu and click on "Directions", it pops up a dialog that is unique to Google Maps. It keeps the MapView in the background, but displays the search dialog from the top (or bottom, if you're on an old version of Android). I was curious if anyone knew how they achieved this effect. I'm willing to create a custom Dialog, but it seems that Dialogs are designed to pop into the middle of the screen (any other types of dialogs are denied permission as system dialogs). What trick is Google Maps using?

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• Show extra info for Preference screens when CheckboxPreference summary field is not enough long?

  - by Pentium10

  I have situation when you can enabled/disable modules for my Android application. For this I use a CheckboxPreference screen. This is all good, but the summary field gets cut off if longer descriptions are added than 2 lines. Suppose I have 4-5 lines of description available for each module, I would like to display this in a helper window. I tried to bind a click event to the CheckboxPreference, but that fires for the whole line, so not only when the checkbox is clicked, and more, where ever you click on the line the checkbox is toggled. So now I am wondering if this can be fixed. So if the user needs more info, just taps the text and the helper opens up, and if want to toggle the settings it taps the checkbox. How would you do it? I am open to other ideas too, if they do work.

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• IntentNotFoundException for TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA

  - by Casebash

  I am trying to implement text to speech by following this article on the Android Developers Blog. It suggests the following code for installing text to speech data if it is not supported. Intent installIntent = new Intent(); installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA); startActivity(installIntent); This throws an Exception: ActivityNotFoundException: No activity found to handle Intent However, I am using the code here to determine the the intent is actually supported. Here is the list representation: [ResolveInfo{43cc5280 com.svox.pico.DownloadVoiceData p=0 o=0 m=0x108000}] Why doesn't this work?

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