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  • How to stop an activity with GL view. Application not responding

    - by David
    I have an activity that I want to programmatically stop after some elapsed time. I have a GL view running. My understanding is that the GLSurfaceView.renderer is running in its own thread, so I created a handler instantiated from the activity. In the GLSurfaceView I post a message. The handler then attempts to stop the activity with the following: onStop(); finish(); The activity seems to close. However, if I try to restart the application, I get a blank screen, the phone is practically locked up and eventually I get a message that the activity in the application is not responding. I'm also getting geting a wake lock, ie PowerManager.newWakeLock(...). When I try to release it, I get an exception. Not sure if its the GL view of the wake lock which is causing me troubles. Any ideas appreciated.

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  • Can I update an image in the drawable directory from code?

    - by kknight
    I have a picture in res/drawable directory: res/drawable/picture.jpeg. Can I dynamically update this picture.jpeg from code? i.e. I want to use another picture to replace this picture in the drawable directory dynamically. If I can, what path should I use to access the picture? Should I use "res/drawable/picture.jpeg"? Thanks.

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  • How to use custom font with Webview

    - by user164542
    Now i want to display some unicode characters and i have used tag: something herer . But it seems that webview can not find the Arial font because i can only see UFO - Characters . Do i have to copy arial.ttf to somewhere or how can i use this true- type-font with webview? Thanks.

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  • Is there any way to store full size image returned from camera activity in internal memory ?

    - by SimpleGuy
    I am using Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(externalFileObj)); intent to call default camera activity. To get full image you need to specify intent.putExtra(). But this always requires URI that works only for external storage files. I tried to create a temp.jpg image in internal memory and pass its URI Uri.fromFile(new File(getFilesDir() + "/temp.jpg")); but the camera activity won't return back after the image is captured. So there is no way to get Full size image from default camera application in our activity without using any external storage ? Assuming that the device do not have SD card or currently in use is there no way I can avoid using it ? Yes I know we can create our own camerapreview surface but I want to use the default camera application as it is natural with many more options. Thanks.

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  • OpenGL 2D editor ?

    - by Fevos
    I want to draw different 2D objects in OpenGL for example a path/Road ,is there any program i could draw them using a GUI then transfer them to points so i could use them in my program ?

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  • Emulate back button in multi-view TabActivity

    - by ZelluX
    Hi, all I have a TabActivity with several tabs. Each tab corresponds to a specific view, and those views may further switch to other views. For example, one of my tabs displays RSS feed list, after user clicks one of the RSS feed, it will switch to a view displaying a list of articles, and after user clicks one of the titles, a full article view will be displayed. I'm going to add support for "back" button in my application. For instance, in a full article view, after user presses the "back" button, it should switch back to the article list view. And if user presses it the "back" button again, my application should switch back to the feed list view. My idea is to maintain a Stack<View> during navigation, and every time user presses the "back" button, the program will pop a View out of the stack, and set it as the current view. But I would like to know how to set current view in TabHost. Many thanks.

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  • how to draw a Bitmap to a Canvas with a variable alpha

    - by steelbytes
    Hi, I'm trying to draw a Bitmap to a Canvas with a variable amount of alpha. But I only get nothing (when alpha<255) or the 'full' bitmap (when alpha==255). Have also tried loading as a Drawable, and using drawable.setAlpha, but that gave the same result. my init BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inScaled = false; opts.inSampleSize = 1; Bitmap img = BitmapFactory.decodeResource(getResources(),R.drawable.sample,opts); my onDraw() Paint p = new Paint(Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG); p.setColor((alpha<<24)+0xffffff); // alpha in range 0..255 canvas.drawBitmap(img, null, imgRect, p);

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  • how to get series of pictures?

    - by rmaster
    i have problems with this, recently i have also problem with just taking 1 photo... do you know how to solve it? any working code? i'm doing it like that: mCamera = Camera.open(); Log.e(TAG, "onCreate"); mCamera.takePicture(null, mPictureCallback, mPictureCallback); Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() { public void onPictureTaken(byte[] imageData, Camera c) { if (imageData != null) { //process photo } } }; in onDestroy() i release the camera on simulator it works, on telephone - 1st time runs without problems but no picture, second and next times - 'force close' - looks like camera is not released ...

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  • Speed/expensive of SQLite query vs. List.contains() for "in-set" icon on list rows

    - by kpdvx
    An application I'm developing requires that the app main a local list of things, let's say books, in a local "library." Users can access their local library of books and search for books using a remote web service. The app will be aware of other users of the app through this web service, and users can browse other users' lists of books in their library. Each book is identified by a unique bookId (represented as an int). When viewing books returned through a search result or when viewing another user's book library, the individual list row cells need to visually represent if the book is in the user's local library or not. A user can have at most 5,000 books in the library, stored in SQLite on the device (and synchronized with the remote web service). My question is, to determine if the book shown in the list row is in the user's library, would it be better to directly ask SQLite (via SELECT COUNT(*)...) or to maintain, in-memory, a List or int[] array of some sort containing the unique bookIds. So, on each row display do I query SQLite or check if the List or int[] array contains the unique bookId? Because the user can have at most 5,000 books, each bookId occupies 4 bytes so at most this would use ~ 20kB. In thinking about this, and in typing this out, it seems obvious to me that it would be far better for performance if I maintained a list or int[] array of in-library bookIds vs. querying SQLite (the only caveat to maintaining an int[] array is that if books are added or removed I'll need to grow or shrink the array by hand, so with this option I'll most likely use an ArrayList or Vector, though I'm not sure of the additional memory overhead of using Integer objects as opposed to primitives). Opinions, thoughts, suggestions?

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  • Custom changeable handler when a Service finishes downloading a file

    - by jax
    I have a Service that downloads a file from the internet. What I want is for the response (an InputStream in this case) to be handled by a custom handler that can be switched (like a strategy pattern) but I can't figure out how to do this. So basically the User of the API would be able to plug in different handlers for the response, some would parse XML, others might save files etc. I realise I could pass through the activity context and execute the method from this (given some interface) but I don't want to do this obviously, in case the Activity is closed in the meantime while the file is still downloaded. How might I do this?

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  • Update model objects across different activities

    - by Tom Esterez
    Lets say I have 2 activities: A: A ListView displaying articles titles. Data is fetched from a web server and converted from XML to a list of ArticleSummary. Only user titles and id are returned by the server. Click on a title starts activity B. B: A form to edit an article. Article is fetched from server. When the user hits OK, modifications are sent to the server and activity closed. When the user go back to activity A, I would like to update the article title without any additional web request. I was thinking about the following solution: When article is modified, send a broadcast event with article id and new attributes values. Listen for this event on activity A Update the ArticleSummary object notify data changed on ListView Is there a better approach ?

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  • sort date fields to obtain earliest date

    - by manu
    in my database , dates are stored in DD-mm-yyyy format , how can i sort this to obtain the earliest date ? Cursor c = myDb.query(TABLE, new String[]{"dob"}, null, null, null, null, "dob"); I have selected it to order by dob field but its not ordered ... This is the output for the above query 01-03 17:14:51.595: VERBOSE/ORDER DOB(1431): 01-11-1977 01-03 17:14:51.595: VERBOSE/ORDER DOB(1431): 01-12-1988 01-03 17:14:51.614: VERBOSE/ORDER DOB(1431): 15-01-1977 01-03 17:14:51.656: VERBOSE/ORDER DOB(1431): 31-01-1988

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  • Which type of data can be garbage collected when app is in background?

    - by Neoh
    Let's say I start from activity A - activity B. While in activity B I press home to exit. After a long time, gc may be called because other apps take higher priority. My question is, which of the following type of data will be garbage collected (I'm pretty sure static fields can be garbage collected any time but I'm not sure about these): i) fields that are declared final or static final ii) intent and its data that I passed from activity A to activity B iii) onSavedInstanceState when orientation is changed during the app running I ask this because I want to ensure that my app won't crash when I restore activity B from background after a long period.

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  • Switch back to previously selected tab after the activity is recreated

    - by ZelluX
    In my TabActivity the user may be asked to switch to browser activity for OAuth phase, and if the phase takes too much time, my activity will be killed. After the user switches back to my activity, its onCreate() method is invoked again and tabs are recreated. So I would like to know if there is any simple way to switch back to previous tab, and keep the tab as what it was. For example, one of the tab views contains a ViewSwitcher child, and I want to switch back to the switched view after recreating the activity.

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  • How to handle feedback from background threads if the user uses the back button?

    - by Janusz
    I have the following problem: I have an Activity where a user can start a web search showing a new activity to show a progress bar until the results are shown. Now the user can either wait for the results or maybe think about the search parameters, hit the back button and triggering a new search. The search is running in an Async Task and therefor still running if the user hits back. At the moment the thread finishes it calls some methods on the old activity causing the activity to show a dialog. This causes the system to crash because the dialog tries to show itself with a reference to an activity that is not longer present on the screen. How can I achieve a dialog that is only shown if the activity is still active?

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  • Add progressbar to BZip2CompressorInputStream

    - by bordeux
    This is my code: public void extract(String input_f, String output_f){ int buffersize = 1024; FileInputStream in; try { in = new FileInputStream(input_f); FileOutputStream out = new FileOutputStream(output_f); BZip2CompressorInputStream bzIn = new BZip2CompressorInputStream(in); final byte[] buffer = new byte[buffersize]; int n = 0; while (-1 != (n = bzIn.read(buffer))) { out.write(buffer, 0, n); } out.close(); bzIn.close(); } catch (Exception e) { throw new Error(e.getMessage()); } } How can i add progress bar to extract task, or how can i get the compressed file size?

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  • ListView created programmatically - emptyView doesn't show

    - by Yorick
    I've created custom ListView programmatically, and set view to show when ListAdapter is empty but nothing shows on the screen in that case, what can be wrong? public PlayerList(Context context, Activity activity) { super(context); mParent = activity; setOnItemClickListener( new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { ... } }; List<PlayerInfo> players; players = getPlayerList(); // here size of players == 0 setAdapter(new PlayersAdapter(this.getContext(), R.id.player_name, players)); LayoutInflater vi = (LayoutInflater)mParent.getSystemService(Context.LAYOUT_INFLATER_SERVICE); emptyView = vi.inflate(R.layout.empty_view, null); // emptyView is View, and member of PlayerList this.setEmptyView(emptyView); }

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  • Force Tab Activity creation?

    - by Daniel
    I have a TabHost and several tabs added to it. Problem: The activities on these tabs are not created until the tab is pressed. My tabhost is broadcasting intents but my broadcast receivers are not registered until onCreate in my tab activities is called. Is there any way to force activity creation? Maybe my tabhost can call setCurrentTab and switch back to main tab(0), but is that really the best option available?

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  • Adding a Main Menu to a Game in Xcode

    - by MasenB
    I am about done with an Objective - C Sprite Kit Development course on Lynda, and I wanted to expand on the app the course had me make! It was made so that once I open the app, it started brick breaker, and then there are more classes for additional scenes like Game Over and Restart! I was wondering if someone could tell me how to make a Main Menu view controller that came before the Brick Breaker screen! Thanks, Masen

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  • Button.setOnClickListener doesn't work?

    - by user164589
    Hi guys, I am trying to make a button using programmable way. My code is : Button mybutton = new Button(this); mybutton.setText("My Button"); linearLayout.addView(mybutton, 3); mybutton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.println(Log.ERROR, "MyApp", "Clicked on the button."); } }); But its setOnClickListener doesn't work. What is wrong for me ? Please help. Thanks.

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