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• What is in scala-android.jar?

  - by synic

  I've been trying to experiment with developing Android applications with Scala. I've gotten to the point where I can get the app to compile, but there are no helper functions for things like: button.setOnClickListener( () => { text.setText("test") }) (I'm talking about the closure there) I see lots of references to scala-android.jar, and have this file in my project, but I'm not sure what it does, or how to use it. I get the feeling it has these helper conversion functions, but I'm not sure. Running jar -tvf scala-android.jar on the file gives me this: 401 Sun Jun 06 10:06:02 MDT 2010 scala/Function0$class.class 431 Sun Jun 06 10:06:02 MDT 2010 scala/Function0.class 572 Sun Jun 06 10:06:02 MDT 2010 scala/Function1.class 282 Sun Jun 06 10:06:02 MDT 2010 scala/ScalaObject$class.class 271 Sun Jun 06 10:06:02 MDT 2010 scala/ScalaObject.class 458 Sun Jun 06 10:06:02 MDT 2010 scala/runtime/BoxedUnit.class If this isn't what I'm looking for, is there a simple library that'll do conversions for this kind of stuff?

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• Uploading images to a PHP server from Android

  - by Samuh

  I need to upload an image to a remote PHP server which expects the following parameters in HTTPPOST: *$_POST['title']* *$_POST['caption']* *$_FILES['fileatt']* Most of the internet searches suggested either : Download the following classes and trying MultiPartEntity to send the request: apache-mime4j-0.5.jar httpclient-4.0-beta2.jar httpcore-4.0-beta3.jar httpmime-4.0-beta2.jar OR Use URLconnection and handle multipart data myself. Btw, I am keen on using HttpClient class rather than java.net(or is it android.net) classes. Eventually, I downloaded the Multipart classes from the Android source code and used them in my project instead. Though this can be done by any of the above mentioned methods, I'd like to make sure if these are the only ways to achieve the said objective. I skimmed through the documentation and found a FileEntity class but I could not get it to work. What is the correct way to get this done in an Android application? Thanks.

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• Upload image from J2ME client to a Servlet

  - by Akash

  I want to send an image from a J2ME client to a Servlet. I am able to get a byte array of the image and send it using HTTP POST. conn = (HttpConnection) Connector.open(url, Connector.READ_WRITE, true); conn.setRequestMethod(HttpConnection.POST); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); os.write(bytes, 0, bytes.length); // bytes = byte array of image This is the Servlet code: String line; BufferedReader r1 = new BufferedReader(new InputStreamReader(in)); while ((line = r1.readLine()) != null) { System.out.println("line=" + line); buf.append(line); } String s = buf.toString(); byte[] img_byte = s.getBytes(); But the problem I found is, when I send bytes from the J2ME client, some bytes are lost. Their values are 0A and 0D hex. Exactly, the Carriage Return and Line Feed. Thus, either POST method or readLine() are not able to accept 0A and 0D values. Any one have any idea how to do this, or how to use any another method?

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• Two Way Data Binding With a Object in WPF,Image Control

  - by Candy

  Sorry, my English is not very good, I have a object "Stuffs" "Stuffs" have a Property “Icon” now: xaml <Button Click="Button_Click"><Image Width="80" Height="80" Source="{Binding Path=Icon,Converter={StaticResource ImageConverter}}"/></Button> cs private void Button_Click(object sender, RoutedEventArgs e) { IconFloder.Title = "Icon"; String IconFloderPath = AppDomain.CurrentDomain.BaseDirectory + ItemIconFloder; if (!System.IO.Directory.Exists(IconFloderPath)) System.IO.Directory.CreateDirectory(IconFloderPath); IconFloder.InitialDirectory = IconFloderPath; IconFloder.Filter = "Image File|*.jpeg"; IconFloder.ValidateNames = true; IconFloder.CheckPathExists = true; IconFloder.CheckFileExists = true; if (IconFloder.ShowDialog() == true) { HideImage.Text = ItemIconFloder + "\\" + IconFloder.SafeFileName; ((sender as Button).Content as Image).Source = new ImageConverter().Convert(ItemIconFloder + "\\" + IconFloder.SafeFileName, Type.GetType("System.Windows.Media.ImageSource"), null, new System.Globalization.CultureInfo("en-US")) as ImageSource; } } class ImageConverter:IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if (value is string&&!String.IsNullOrEmpty(value.ToString())) { try { return new BitmapImage(new Uri(AppDomain.CurrentDomain.BaseDirectory + value)); } catch { } } return null; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } I would like to click buttons, change the picture, Also change Data Binding Stuffs.Icon But failed,I have no idea?I need help? I do not know whether I speak clearly

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• Pagination For SMS in Android specifically

  - by Priyank

  Hi. I had a pagination related question posted earlier. Here I went through the posted answers and suggested choices and I realized that to implement pagination in an application I could still write db level queries and ensure that I could implement pagination, even if in a crude form. However I have few follow up questions now: I am trying to show SMS from a content provider. Suppose I don't want to use content provider; can I access SMS table in database through my application. Aoes android's security framework allow that? How do people generally handle pagination problems in android, related to content that they are not storing but instead are fetching through content providers. (Android's own or custom) Isn't this a bigger problem. I am surprised to find so little text online about it.

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• Optimizing code using PIL

  - by freakazo

  Firstly sorry for the long piece of code pasted below. This is my first time actually having to worry about performance of an application so I haven't really ever worried about performance. This piece of code pretty much searches for an image inside another image, it takes 30 seconds to run on my computer, converting the images to greyscale and other changes shaved of 15 seconds, I need another 15 shaved off. I did read a bunch of pages and looked at examples but I couldn't find the same problems in my code. So any help would be greatly appreciated. From the looks of it (cProfile) 25 seconds is spent within the Image module, and only 5 seconds in my code. from PIL import Image import os, ImageGrab, pdb, time, win32api, win32con import cProfile def GetImage(name): name = name + '.bmp' try: print(os.path.join(os.getcwd(),"Images",name)) image = Image.open(os.path.join(os.getcwd(),"Images",name)) except: print('error opening image;', name) return image def Find(name): image = GetImage(name) imagebbox = image.getbbox() screen = ImageGrab.grab() #screen = Image.open(os.path.join(os.getcwd(),"Images","Untitled.bmp")) YLimit = screen.getbbox()[3] - imagebbox[3] XLimit = screen.getbbox()[2] - imagebbox[2] image = image.convert("L") Screen = screen.convert("L") Screen.load() image.load() #print(XLimit, YLimit) Found = False image = image.getdata() for y in range(0,YLimit): for x in range(0,XLimit): BoxCoordinates = x, y, x+imagebbox[2], y+imagebbox[3] ScreenGrab = screen.crop(BoxCoordinates) ScreenGrab = ScreenGrab.getdata() if image == ScreenGrab: Found = True #print("woop") return x,y if Found == False: return "Not Found" cProfile.run('print(Find("Login"))')

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• R cannot be resolved - android error

  - by MaurizioPz

  Hi, I just downloaded and installed the new android sdk. I wanted to create a simple application to test drive it. the widzard creates this code: package eu.mauriziopz.gps; import android.app.Activity; import android.os.Bundle; public class ggps extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } } but ecplise give me this error R cannot be resolved on this line setContentView(R.layout.main); can any one explain me why? ps. I do have an xml file named main.xml under res/layout/

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• Get data to android app from mysql server

  - by Fabian

  Hi i have an mysql database with some sports results in it. I want to write an android application to display these data on mobile phones. I´ve searched on the internet for this issue and i think it is not possible to have a direct connection between the mysql database and the android application. (Is this right?) So my question is the following: How can i have access in the android application to the mysql database in order to display some of the data? Thank you for your answers! Fabian

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• Android: A Toast when OutComing call

  - by Skatephone

  Hi, i'm trying this code found on internet...it should show a toast for OutComing call event using a BroadcastReceiver but on my htc tattoo with Android 1.6 it doesn't works (it don't show any toast) public class HFBroadcastOutComingRecevier extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context, "Phone Event", Toast.LENGTH_SHORT).show(); Bundle bundle = intent.getExtras(); if(null == bundle) return; String phonenumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER); String info = "Detect Calls sample application\nOutgoing number: " + phonenumber; Toast.makeText(context, info, Toast.LENGTH_LONG).show(); } } Naturally i've registered the BroadcastReceiver on my Manifest as: and with this permissions: <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/> Any idea?

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• How to add a dynamic library to Android?

  - by Malcolm

  I want to add a non-native shared library to Android so every application on the device would be able to use it. I mean using packaged classes just like a core library as if they were present in the application itself. I studied Android source code to figure out a way to add a new path to the application ClassLoader and found out that it is created during startup and there's no way to change the paths later. I can use my own ClassLoader, but all I will get after loading a class will be a reference to a Class object. This way I will be bound to work through reflection mechanism, which is slower than the native execution system. Is there any way to organise a shared library on Android?

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• Android.mk - How to assemble and link ARM assembler files

  - by Kim

  Hi, I have some *.cpp source files and some *.s ARM assembler files I want to assemble and link in my Android.mk file (by running ndk-build script). My Android.mk file looks like this: LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_ARM_MODE := arm LOCAL_MODULE := libTestJNI LOCAL_SRC_FILES := Test.cpp TestAS_gas4.s LOCAL_CFLAGS := -DHAVE_CONFIG_H -DFPM_ARM -ffast-math -O3 -DOPT_ARM LOCAL_LDLIBS += -llog include $(BUILD_SHARED_LIBRARY) Unfortunately the .s file is not recognized. ndk-build says: Gdbserver : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver Gdbsetup : libs/armeabi/gdb.setup make: ** No rule to make target /cygdrive/c/projects/TestAS_gas4.s', needed by/cygdrive/c/projects/obj/local/armeabi/objs-debug/libTestJNI/TestAS_gas4.o'. Stop. In a "normal" makefile I would have to assemble by using "as" in a rule. How is it done in the Android.mk files? /Kim

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• Finding out all about Android Uri class - use and purpose

  - by Peter vdL

  Does anyone have some helpful links to find out about Android Uri's? For example, you get a Uri back from a "take a picture" Intent. What does a URI look like and how do you use it. Why are they used instead of filenames or file handles? The Dev documentation on the Uri class is practically worthless. http://developer.android.com/reference/android/net/Uri.html It is only clear if you already know exactly what it is, and how to use it. Thanks for any links.

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• Image Wells, Core Data, and Sqlite files.

  - by Sway

  I've got a mac application that I've developed. I use it to create sqlite files that are bundled with my iphone app. The mac app uses Core Data and bindings and is working fine except for one "weird" issue. I use an NSImageView (or Image Well) to allow me to drag and drop jpg files. This is bound through to an optional binary attribute in my model class. For some reason when I drag and drop a 4k jpg file it onto the image well and save the sqlite file. The data saved to the binary column is over 15 times larger than it should be. Whereas if I use an application like SQLiteManager and add the image into the row in the database. The binary data is the correct (expected size). File 4k jpg Actual size: 2371. Persisted via Core Data size: 35810. Can anyone give me a suggestion as to why this might be happening? Do I need to set some setting in Interface Builder or write some custom code?

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• Dynamic Midi generation and playback on Android: Possible?

  - by Peterdk

  Strangely I find no support for Midi in Android. The only thing that comes close is the Jetplayer, but this only takes a existing .jet file. I want to dynamically generate a midi file with some intervals and play it. I even thought about just manually creating a .jet file with a tone and then transposing it with the jet player, but it limits the transposing to -12, +12. Which is not so good for me. There also is a ToneGenerator on Android, but it's limited to predefined tones with no way to transpose. Does someone know how to achieve midi generation and playback on Android?

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• How to secure connection between PHP and Android

  - by Elad Cohen

  I am developing an application for the Android that requires a connection with PHP pages in order to add sensitive data to a database that will affect the application. Since it's very easy to reverse engineer an android app, one can simply find the url where the data is sent to and manipulate it. I thought about creating a registration based on IMEI, but one can still able to manipulate it for his malicious purposes. I have also checked OAuth but I didn't really understand how it works and if it can help in my condition. What can I do to fully secure my application? Thanks in advance! EDIT: By the way, what I am mostly trying to achieve here is to make sure the requests are being sent from an Android and not from any other device.

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• Full size image in ImageView

  - by Kilnr

  Hi, I'm trying to draw an image in an ImageView, but i want it to be unscaled, with scrollbars as necessary. How can I accomplish this? Right now I just have a drawable set as the android:src of the ImageView in the XML. This autoscales the image to fit the screen width. I read that this might be because of the compatibility mode (developing for 1.5, testing on 2.1), but then I added <uses-sdk android:minSdkVersion="3" android:targetSdkVersion="4" /> to my manifest, and nothing changed. Any clues?

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• Building a specific piece of Android platform?

  - by Chrisc

  Hi, I have been trying to build only the "/libcore" directory of the Android platform. When I try mmm libcore I end up with the following output: ============================================ PLATFORM_VERSION_CODENAME=REL PLATFORM_VERSION=2.1-update1 TARGET_PRODUCT=generic TARGET_BUILD_VARIANT=eng TARGET_SIMULATOR=false TARGET_BUILD_TYPE=release TARGET_ARCH=arm HOST_ARCH=x86 HOST_OS=linux HOST_BUILD_TYPE=release BUILD_ID=ECLAIR ============================================ make: Entering directory `/home/chris/android/platform' target Prebuilt: (out/target/product/generic/system/etc/security/cacerts.bks) host Prebuilt: run-core-tests-on-ri (out/host/linux-x86/obj/EXECUTABLES/run-core-tests-on-ri_intermediates/run-core-tests-on-ri) target Prebuilt: run-core-tests (out/target/product/generic/obj/EXECUTABLES/run-core-tests_intermediates/run-core-tests) Copy: out/target/product/generic/system/etc/apns-conf.xml Copying: out/target/common/obj/JAVA_LIBRARIES/core_intermediates/classes-full-debug.jar Copying: out/target/common/obj/JAVA_LIBRARIES/core-tests_intermediates/classes-full-debug.jar /bin/bash: jar: command not found make: *** [out/host/common/core-tests.jar] Error 127 make: *** Deleting file `out/host/common/core-tests.jar' make: Leaving directory `/home/chris/android/platform' Does anyone have any suggestions on what Error 127 is, or another method I can go about building "libcore" without having to build the entire platform again? Thanks, Chris

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• android activity class does not exists?

  - by user975234

  I have been developing a project in eclipse for an android app. An error which i frequently get is that of- activity class does not exist. But when i just save the manifest file once again the error vanishes and the program runs correctly. Why then do i get the same error again and again. ? Console error: [2011-11-18 15:08:38 - link] Starting activity acb.abc.LinkActivity on device emulator-5554 [2011-11-18 15:08:40 - link] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=acb.abc/.LinkActivity } [2011-11-18 15:08:40 - link] New package not yet registered with the system. Waiting 3 seconds before next attempt. [2011-11-18 15:08:40 - link] ActivityManager: Error: Activity class {acb.abc/acb.abc.LinkActivity} does not exist.

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• Get remote image using cURL then resample.

  - by Chris

  I want to be able to retrieve a remote image from a webserver, resample it, and then serve it up to the browser AND save it to a file. Here is what I have so far: $ch = curl_init(); // set URL and other appropriate options curl_setopt($ch, CURLOPT_URL, "$rURL"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 0); // grab URL and pass it to the browser $out = curl_exec($ch); // close cURL resource, and free up system resources curl_close($ch); $imgRes = imagecreatefromstring($out); imagejpeg($imgRes, $filename, 70); header("Content-Type: image/jpg"); header("Content-length: ".filesize($filename)); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".filesize($filename)); readfile("$filename"); exit(); Update Updated code to include imjpeg step to save the image as lower quality. But how do I then, efficiently, serve this up to the browser. I currently, later in the code, do this readfile("$filename"); along with some header information but that means I'm reading the file back in again which seems inefficient.

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• XPCOM support in Android webkit browser?

  - by Krish

  Does the Android WebKit supports the XPCOM framework or NPRuntime API`s as like Firefox? How to implement JavaScript in the Android WebKit plug-in? Update: I am writing a media player plug-in for the Android WebKit browser and my plug-in needs to get the command from the web page through JavaScript (some actions like play/pause/stop/resize are issued as JavaScript commands from the browser). My plug-in is written in native C code. Are there any examples or sample plug-in available for JavaScript communication?

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• About Android IDE

  - by licorna

  Right now I'm using Eclipse for Android development, but my computer is kind of old and I like responsive development environments. I've tried using VIM, Emacs and TextMate but I'm missing every feature in the Eclipse Android plugin: Auto generate R class Check for errors & warnings on code Auto completion Deploy to device or emulator Integrate with DDMS The list goes to infinity ... I know Eclipse is the best for what I want to do, but if I want to use any editor, what do you recommend to achieve a not so frustrating Android development experience?

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• Is it possible to run a MIDP application under Android

  - by SteveM

  The Google Market offers an application purporting to run J2ME MIDP applications on the Nexus One. I have tried this application but it only appears to run MIDP applications that are downloaded from particular web sites; it does not seem capable of picking up a MIDP application that is stored on the SD card in the phone. I have suggested to the developers that they might like to add such functionality, but they have not been particularly responsive to my messages. So I would like to build my own MIDP runner for Android and would like to see if I can find a pointer as to where to start, or even whether this is possible. The MIDP application in question was supplied on CD along with a security camera system and permits remote viewing and remote control over the security system. Clearly it wasn't built with the Android platform in mind. However, if it is possible somehow to run MIDP applications on Android (perhaps by creating some kind of sandbox environment for example) then I'd be quite keen to develop it.

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• Android-iPhone single codebase cross development

  - by Lorenzo

  Is there a way, apart from using HTML and JavaScript on a web control, to have an (almost) single codebase for an application that should run on iOS and Android? The big issue is of course that they use a different language (Java for Android, Objective-C for iOS) for application development. It would be nice to have some sort of meta-language that will be translated in Java and in Objective-C. What about Flash? Adobe wasn't supposed to release a tool to create flash-based apps in iOS? Update: based on current answers, the best cross platform development tool for iOS and Android seems to be Titanium appcelerator. I suspect that this topic will evolve overtime, so feel free to contribute with new information and comments. Thank you!

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• iPhone OS: Strategies for high density image work

  - by Jasconius

  I have a project that is coming around the bend this summer that is going to involve, potentially, an extremely high volume of image data for display. We are talking hundreds of 640x480-ish images in a given application session (scaled to a smaller resolution when displayed), and handfuls of very large (1280x1024 or higher) images at a time. I've already done some preliminary work and I've found that the typical 640x480ish image is just a shade under 1MB in memory when placed into a UIImageView and displayed... but the very large images can be a whopping 5+ MB's in some cases. This project is actually be targeted at the iPad, which, in my Instruments tests seems to cap out at about 80-100MB's of addressable physical memory. Details aside, I need to start thinking of how to move huge volumes of image data between virtual and physical memory while preserving the fluidity and responsiveness of the application, which will be high visibility. I'm probably on the higher ends of intermediate at Objective-C... so I am looking for some solid articles and advice on the following: 1) Responsible management of UIImage and UIImageView in the name of conserving physical RAM 2) Merits of using CGImage over UIImage, particularly for the huge images, and if there will be any performance gain 3) Anything dealing with memory paging particularly as it pertains to images I will epilogue by saying that the numbers I have above maybe off by about 10 or 15%. Images may or may not end up being bundled into the actual app itself as opposed to being loaded in from an external server.

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• Android application chrashes after "share" intent

  - by Johe Green

  Hi, My app offers a "share/tell-a-friend" function. When the "share" button is pressed the following method is being called to open a list of apps, which can perform the action (Eg. Gmail, Twittroid, Facebook...): public void share() { Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND); shareIntent.setType("text/plain"); shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, getText(R.string.menu_share_subject)); shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, getText(R.string.menu_share_body)); startActivity(Intent.createChooser(shareIntent, getText(R.string.menu_share_intent))); } The sharing functionality works basically. But when the sharing app (Facebook, Twitter, ...) tries to return to my app, a force close is thrown. I guess that my app gets closed in the background during the sharing process... at least that is what the debugger sais... Any ideas?

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