Wednesday, October 10, 2012

Barcode Scanner Example Projects

For some reason a lot of folks have trouble setting up the BarcodeScanner Plugin. I've just posted two zip files to my Dropbox account.


1) Barcode scanner library project
2) Barcode scanner example project

Import both of these projects into Eclipse and you should be all set to go. Hopefully seeing the full projects will help people get up and running.

If this works for you and you don't already have Dropbox sign up for the free service via my referral link so I can have more space to host future example projects. Thanks!

Update: The easiest way to get this projects into Eclipse is to do the following. In Eclipse, go to the File menu, select the Import option, expand the Android folder, select Existing Android Code into Workspace. Then in the dialog that pops up select Finish. Now the project has been imported. If you have an error in your project, specifically with AndroidManifest.xml then you will want to right click on the project folder and select properties. Select Android and then choose the latest version of the Android SDK that you have installed. At this point the errors should go away, if they don't select the Project menu then Clean.
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90 comments:

  1. ayeshaOctober 10, 2012 at 10:56 PM

    Thank you Sir, It really help. But I had a problem with customized scanner plugin. BarcodeScanner works fine but if I need to make SCAN on button click or any other event. For that purpose I have made few changes in capture.xml and capture activity class. I have created new button name 'close' and created new function 'myFuction' that should be triggered on button click.

    here is code of xml
    http://pastie.org/4811161

    here is code of java
    http://pastie.org/4811161

    which runs perfect, but guide me how to execute myFunction() on Button Click (on 'close' button Click event).

    ReplyDelete
  2. Simon MacDonaldOctober 11, 2012 at 11:22 AM

    @ayesha

    Move line 174 to 169 and when you click the close button myFunction() will be called.

    ReplyDelete
  3. sangeeth_LVSOctober 15, 2012 at 5:56 AM

    HI SIMON ,
    i am sangeeth , when i try to upgrade my barcode Plugin to PHONEGAP2.0 using the LIbrary avilable in GITHUB. it is showing me an error like

    Conversion to Dalvik format failed with error 1

    do i need to use a seperate Library for Phonegap 2.0.i think there is a huge update made in cordova2.0 in the coding part . they have Removed IPlugin.java as far as i looked in to it GITHUB incubator of cordova class files .

    java.lang.IllegalArgumentException: already added: Lcom/phonegap/api/IPlugin;

    thanks in advance
    Sangeeth

    ReplyDelete
  4. Simon MacDonaldOctober 15, 2012 at 11:10 AM

    @sangeeth_LVS

    It looks like you are including cordova.jar twice in your build path. You don't need it in your library project libs directory, you only need it in your applications libs folder.

    ReplyDelete
  5. sangeeth_LVSOctober 16, 2012 at 2:32 AM

    Thank You it helped me !!

    ReplyDelete
  6. sangeeth_LVSOctober 16, 2012 at 3:29 AM

    Hi simon,
    PHONEGAP QR encoder :
    while Encoding the QRcode it is encoding and showing it in the new window . is it possible to store the Encoded QRcode in the PhoneStorage ? i think it is useful only in that way .

    Thanks
    Sangeeth Kumar V

    ReplyDelete
  7. Kim Stegenborg MadsenOctober 16, 2012 at 6:23 AM

    Hi Simon

    I´m trying to make this work but Eclipse complains about this line in BarcodeScanner.java:

    getMenuInflater().inflate(R.menu.activity_barcode_scanner, menu);

    "R cannot be resolved to a variable"

    So i uncomment that line and then i can build, but get a new error from the APP it self "Scanning failed: Class not found"

    Problem seems to be that in barcodescanner.js this:
    BarcodeScanner.prototype.scan
    should be
    BarcodeScanner.scan

    Now i don´t get the error but no scanner is startet up (i do have CAMERA and FLASHLIGHT permissions in AndroidManifest.xml)

    What seems to be the problem?

    Eclipse 3.7.2
    Android: 4.0.3

    Kind regards
    Kim

    ReplyDelete
  8. Simon MacDonaldOctober 16, 2012 at 9:25 AM

    @sangeeth_LVS

    That functionality is currently not implemented. It wouldn't be too hard to do but I don't have time to work on it right now.

    ReplyDelete
  9. Simon MacDonaldOctober 16, 2012 at 9:34 AM

    @Kim Stegenborg Madsen

    I have no idea what is going on. In my two example projects the code:

    getMenuInflater().inflate(R.menu.activity_barcode_scanner, menu);

    is never used so I'm not sure about your starting point.

    Also, BarcodeScanner.prototype.scan is correct in the JS. Based on that error you are seeing I'd guess you didn't add the correct lines into your manifest so it can find the capture activity. But again, I'm not sure of your starting point so it is hard to say.

    ReplyDelete
  10. Kim Stegenborg MadsenOctober 17, 2012 at 7:39 AM

    Hi Simon

    I´ve apparently used a different BarcodeScanner.java (from phonegap), which contains a bit more than yours:

    public class BarcodeScanner extends DroidGap {
    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    super.loadUrl("file:///android_asset/www/index.html");
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    //getMenuInflater().inflate(R.menu.activity_barcode_scanner, menu);
    return true;
    }
    }

    So removing the onCreateOptionsMenu method got rid of the "R cannot be resolved to a variable"

    However i still get the "class not found" error.

    I´m gonna download your files once more and start from scratch again. Do i need anything besides these files? I mean, no additional phoneGap/Cordova etc.?

    Kind regards
    Kim

    ReplyDelete
  11. Simon MacDonaldOctober 17, 2012 at 9:21 AM

    @Kim Stegenborg Madsen

    If you use the two projects I have linked to in my post you'll just need to import them into Eclipse. Nothing else is needed.

    ReplyDelete
  12. Kim Stegenborg MadsenOctober 18, 2012 at 9:08 AM

    Okay, so i´ve downloaded the two projects again, importing them from scratch (library first).

    The BarcodeLibrary has several errors in src (client.android, client.android.(book|encode|history|result) and many more)

    The BarcodeScanner has 4 errors in the AndroidManifest:














    So i don´t know, do i have a sick setup or is this expected?

    After outcommenting the above i can build and get the Cordova icon and "device is ready", but i need to test the scanning function. I´m using the index.html file from your previous tutorial: http://simonmacdonald.blogspot.dk/2011/12/installing-barcode-plugin-for-phonegap.html

    and then i get "class not found" again?

    Kind regards
    Kim

    ReplyDelete
  13. Simon MacDonaldOctober 18, 2012 at 9:43 AM

    @Kim Stegenborg Madsen

    As you can see from the above, the error you posted did not get into Blogger. Don't post HTML as it can only handle very basic tags. Can you post the error up on gist or pastebin?

    ReplyDelete
  14. sangeeth_LVSOctober 19, 2012 at 9:40 AM

    Simon

    if u could give me a spark for saving the Encoded QR in to device storage . i think i could catch up and complete the Task . i was blank for 2 days trying this one .

    Thanks
    Sangeeth Kumar V

    ReplyDelete
  15. Simon MacDonaldOctober 19, 2012 at 10:51 AM

    @sangeeth_LVS

    Sorry, I don't have time to go poking around the library project code. It shouldn't be too bad to save a view as a jpg though. You may wan to check out the screen shot plugin for example.

    https://github.com/phonegap/phonegap-plugins/tree/master/Android/Screenshot

    ReplyDelete
  16. sangeeth_LVSOctober 22, 2012 at 2:59 AM

    Simon,

    When i try to share the QRcode Generated it is showing an alert box . "saying SD Card isnot Accessible ".

    ReplyDelete
  17. Kim Stegenborg MadsenOctober 22, 2012 at 7:42 AM

    Hi Simon.
    Here´s the AndroidManifest.xml in pastebin: http://pastebin.com/h0mqL8Af

    Kind regards
    Kim

    ReplyDelete
  18. Simon MacDonaldOctober 22, 2012 at 11:28 AM

    @sangeeth_LVS

    Did you make sure to add the write external storage privilege to your android manifest.xml?

    ReplyDelete
  19. Simon MacDonaldOctober 22, 2012 at 11:31 AM

    @Kim Stegenborg Madsen

    You need to go over the README again. You haven't added the bits to request the Camera & Flashlight nor have you added the necessary activities to call the scanner/encoder.

    https://github.com/phonegap/phonegap-plugins/blob/master/Android/BarcodeScanner/README.md

    ReplyDelete
  20. Kim Stegenborg MadsenOctober 23, 2012 at 4:36 AM

    Hi Simon

    That´s why i earlier asked if i needed anything besides your two examples to import.

    The camera section was there, the flashlight missing in your example has been added, and i´ve followed the README.md from start to end, but i still get the same error: "Class not found" when i press scan in the app.

    I get some warnings from com.phonegap.plugins.barcodescanner/BarcodeScanner.java:

    "The method success(PluginResult, String) from the type Plugin is deprecated" in method onActivityResult():
    this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback);


    Tested on:
    HTC Sensation: 4.0.3
    Virtual device: 4.1.2
    barcodescanner.js: 2.0
    cordova: 2.1

    The project is using Android 2.1, cout that be the problem?
    Tell me what files do you need to see and i´ll pastebin them.

    Kind regards
    Kim

    ReplyDelete
  21. sangeeth_LVSOctober 23, 2012 at 6:38 AM

    simon

    why does all the Phonegap Application crashes on change in orientation . is there any fix for it .

    thanks
    sangeeth kumar

    ReplyDelete
  22. Kim Stegenborg MadsenOctober 23, 2012 at 7:06 AM

    Hi Simon

    FYI, i tried to use Android 4.0.3 against the phone with same Android sw, same result, class not found

    Kind regards
    Kim

    ReplyDelete
  23. Kim Stegenborg MadsenOctober 23, 2012 at 7:33 AM

    More FYI

    "Update (2012/08/09): As of PhoneGap 2.0 the plugins.xml file has been deprecated. It has been replaced with config.xml. So if you are starting a brand new project that has config.xml in the res/xml directory you will need to add your plugin declarations to this file. If you are using an older version of PhoneGap or upgrading an older project to PhoneGap 2.0 you can still use the plugins.xml file as we've got backwards compatibility (sort of). Please note though config.xml will take precedence over plugins.xml so you should not have both files in one of your projects as you'll end up tearing your hair out."

    Exactly what i do :-) I did as the README told me to do, added the plugins.xml file from another project and added the barcodescanner line, but there was a bunch of other plugins aswell in that file, that might have conflicted with config.xml. Now i don´t get the class not found error anymore, but when pressing scan in the app it ask which program to execute the action (it´s in danish), and then dies when i select my app with this error:

    threadid=1: thread exiting with uncaught exception (group=0x40aaf228)
    FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.simonmacdonald.scan/com.google.zxing.client.android.CaptureActivity}: java.lang.ClassNotFoundException: com.google.zxing.client.android.CaptureActivity
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2229)
    at android.app.ActivityThread.access$600(ActivityThread.java:139)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1261)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:4945)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.ClassNotFoundException: com.google.zxing.client.android.CaptureActivity
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1039)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2101)

    Any idea how to solve this?

    Kind regards.
    Kim

    ReplyDelete
  24. Simon MacDonaldOctober 23, 2012 at 10:17 AM

    @sangeeth_LVS

    First off, not all PhoneGap applications crash on orientation change. That would make the framework pretty useless. If your app is crashing on orientation change you are probably missing the orientation attribute from your configChanges in the manifest.

    Make sure you have the following line in your config:

    android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale"

    Follow the instructions at:

    http://docs.phonegap.com/en/2.1.0/guide_getting-started_android_index.md.html#Getting%20Started%20with%20Android

    Look at the end of point number 3.

    ReplyDelete
  25. Simon MacDonaldOctober 23, 2012 at 10:19 AM

    @Kim Stegenborg Madsen

    Okay, it is pretty obvious that you aren't importing the example projects. If you did your manifest would be setup correctly. If you would like me to take a look at your setup please zip up your app and post it somewhere I can download it. I'll take a look at the setup and fix it for you. The back in forth of telling you every possible place to check will take too long. I'd rather fix it and tell you what was missing if that is okay with you.

    ReplyDelete
  26. Simon MacDonaldOctober 23, 2012 at 10:19 AM

    @Kim Stegenborg Madsen

    Okay, it is pretty obvious that you aren't importing the example projects. If you did your manifest would be setup correctly. If you would like me to take a look at your setup please zip up your app and post it somewhere I can download it. I'll take a look at the setup and fix it for you. The back in forth of telling you every possible place to check will take too long. I'd rather fix it and tell you what was missing if that is okay with you.

    ReplyDelete
  27. Kim Stegenborg MadsenOctober 24, 2012 at 8:21 AM

    Hi Simon.

    I´m importing the example projects, it´s just not clear to me which way to do it (maybe cause it´s new to me to work in Eclipse, i´m a VIm man?):
    Should i create a project and import them into that?
    Should i import it directly (file-import), if so choose general->existing project into workspace or android->existing android code into workspace?
    So i tried different approaches and probably messed up previous versions i guess. (how do i save a project in a safe place, so i don´t mess it up, trying new things? by copy project? or is there a smarter way to do it? For now i´m zipping the whole project in windows explorer once in a while...)

    I´d like to figure out how it works and what i´ve done wrong

    zipped file of the project is here:
    http://home.emax.dk/files/BarcodeScanner.7z, this is the barcodescanner project - Do you need the library project aswell?

    Kind regards
    Kim

    ReplyDelete
  28. Kim Stegenborg MadsenOctober 24, 2012 at 11:03 AM

    Hi Simon

    Okay, i tried once more from scratch, this time i made it work, but not without certain challenges :-)

    I Tried to import BarcodeLibraryProject and BarcodeScanner from scratch with file->import->General->Existing projects into workspace. Both says "no project found to import".

    Imported them instead with file->import->Android->Existing Android code into workspace

    BarcodeScanner:
    "project.properties is out of sync with local file", wierd error... Editing the file with the eclipse text editor just showed a press F5 to reload, then it worked
    100 errors (R cannot be resolved to a variable, and in AndroidManifest.xml "hardwareAccelerated", "XlargeScreens", "installLocation, 'configChanges' value 'orientation|keyboardHidden|keyboard|screenSize|locale').

    I tried to debug that... Apparently "installLocation" was added in API level 8, but changing to api 8 or 16 doesn´t remove the error :-(

    The Library was even worse, a bunch of errors in the /src dir, i couldn´t get rid of.

    So i put it aside, looked at it an hour later and decided to make copies of both projects to "filename"+"01". Suddenly the errors on the Library dissapeared. Any idea why this happend?

    Adding the library didn´t work for the BarcodeScanner01 project, but adding library01 did. Then all i did was to follow the https://github.com/phonegap/phonegap-plugins/blob/master/Android/BarcodeScanner/README.md - I changed the bit about adding to res/xml/plugins.xml, instead i added it to res/xml/config.xml since i use phonegap2.0 (add that to the guide?)

    other than that, i replaced your index.html with the one you´ve written here: http://simonmacdonald.blogspot.dk/2011/12/installing-barcode-plugin-for-phonegap.html (maybe add that to your example as with-barcode-js.index.html?)

    Thanks for your help and patience.
    Kind regards.
    Kim

    ReplyDelete
  29. CebbzOctober 25, 2012 at 11:33 AM

    Hello Simon,

    sorry for my english, because i'm french.

    I want to create a custom barcode scanner with phonegap. I have read a lot of tutorial on internet to integrate the barcode scanner plugin in my project, but this plugin never work...(always this error : Class not found)

    I'm not a specialist on java or eclipse environement...

    Maybe you can send me a full code source work perfect for help me for this project...

    I hope you can help me for that.

    please please please.

    my email adress is sebastien.capron(at)gmail.com

    Thank for all.

    Sébastien.

    ReplyDelete
  30. Simon MacDonaldOctober 26, 2012 at 10:37 AM

    @Kim Stegenborg Madsen

    I'm glad it is finally working for you. Yes, when you import these examples they should be done as Android projects. One other thing I need to change is after you import you should change it so it is built with the latest version of Android. That would make a lot of those errors go away.

    ReplyDelete
  31. Kim Stegenborg MadsenOctober 26, 2012 at 5:47 PM

    Hi again.

    I triede to import it at home to (Linux), still got the errors in AndroidManifest.xml, so how did i get rid of those? Added a space somewhere in the file, so it´s changed compared to your version, then saved it and then... errors is gone.

    So wierd, but i thought I´ll share this so the next person who experience this doesn´t spend countless hours figuring out what Eclipse is complaining about...

    Kind regards
    Kim Stegenborg Madsen

    ReplyDelete
  32. Simon MacDonaldOctober 31, 2012 at 10:05 AM

    @Cebbz

    The full source code for both the library and example project are available at the links in my post. Do this to get the projects in your workspace:

    File -> Import -> Android -> Existing Android Code into Workspace

    ReplyDelete
  33. vincuoNovember 7, 2012 at 11:52 AM

    Hi Simon.

    Sorry, i'm sure missing some important point.

    I'm trying to run that application.

    When i launch the application I have only the "Device Ready" window of PhoneGap.

    But how i launch a scan ?

    I'm afraid that the "Example project" is like the "Hello World" of PhoneGap.

    Thanks for a reply.

    ReplyDelete
  34. Simon MacDonaldNovember 7, 2012 at 4:47 PM

    @vincuo

    It wasn't you it was me. The project got clobbered on Dropbox somehow. I just put the correct version back so download it again.

    ReplyDelete
  35. mistik1January 4, 2013 at 6:39 PM

    I have to ask, Does this plugin even support the cordova 2.2.0 or android sdk 4.x?

    For two days now I have tried with both your sample projects and my own and I cannot get this to compile.

    ReplyDelete
  36. Simon MacDonaldJanuary 8, 2013 at 10:07 PM

    @mistik1

    Yeah, it works on my phone running Android 4.1 without any issues. What is your compile issue?

    ReplyDelete
  37. UnknownJanuary 22, 2013 at 10:32 AM

    Hi!

    Found this great plugin last week and have been trying to get it work for me. I get it to scan and it kind of works. After scanning it peeps and says "Product Found" but does not show this UPC code. How can I get this code to some variable for example? I would need it to be in url like http://address.com/page.php?id=HERE

    How can I achieve this? I have used your example projects. Thanks!

    ReplyDelete
  38. Simon MacDonaldJanuary 23, 2013 at 11:20 PM

    @Thomas Berg

    The success callback should be invoked with the UPC in result.text. Possibly you need the updated plugin that I just pushed for version 2.2.0.

    ReplyDelete
  39. UnknownJanuary 25, 2013 at 6:42 AM


    I'm still getting a ton of errors. Since this is my first time with Eclipse, I'm guessing it's something fundamental (e.g. Ant? Working directory?). Is it apparent what's missing by looking at this screenshot of my Eclipse session.

    http://postimage.org/image/nmpy32du9/full/

    ReplyDelete
  40. Simon MacDonaldJanuary 25, 2013 at 8:22 AM

    @roy whitburg rwhitburg

    Well it is hard to tell but the first thing you need to do is to switch what API level you are building CaptureActivity with. Right click on the project folder, select Properties, Android and select the highest level API version you have. The problem is you are building with an API level that doesn't support xlargescreens.

    After that I'd try closing an opening the project as it seems like your gen folder is not getting updated. That is where all the R errors come from.

    ReplyDelete
  41. UnknownJanuary 25, 2013 at 7:52 PM


    Thanks for responding. I have the latest API level checked (17) in both the library and application.

    I right clicked and "closed project" then "opened project" for both as well, which did make some of the red alerts go away in the navigator view. But I'm still having the same problems (see image).

    Most of the problems refer to a CaptureActivity Path. I noticed that I have no such physical directory. Was that supposed to have been (automatically or manually) created at some point?

    http://postimage.org/image/s1h7o27w3/full/

    ReplyDelete
  42. UnknownFebruary 4, 2013 at 12:05 AM

    I'm using the latest API. Closing and opening the project did get rid of some of the problems, but most remain, as you can see below. Not sure where else to turn, as this is my first phonegap project.

    http://postimage.org/image/s1h7o27w3/full/

    Thanks.

    ReplyDelete
  43. UnknownFebruary 6, 2013 at 4:01 AM

    Disregard my previous posts. I "Cleaned" it and, other than a bunch of warnings, it's working well now.

    Thanks for the app!

    ReplyDelete
  44. UnknownFebruary 21, 2013 at 3:39 AM

    hello mrs. Mac donald, i try used your app, but barcode scanner doesn`t show me a alert, why?

    ReplyDelete
  45. Simon MacDonaldFebruary 21, 2013 at 1:35 PM

    @ALMORA DEV

    Didn't give me much to go on. What do you see in "adb logcat"?

    ReplyDelete
  46. UnknownFebruary 22, 2013 at 12:53 PM

    this is my log

    D/CordovaLog(31978): *********** start scan *********
    D/CordovaLog(31978): file:///android_asset/www/js/index.js: Line 39 : *********** start scan *********
    I/Web Console(31978): *********** start scan ********* at file:///android_asset/www/js/index.js:39
    D/CordovaLog(31978): *********** finish scan *********
    D/CordovaLog(31978): file:///android_asset/www/js/index.js: Line 50 : *********** termina funcion scan *********
    I/Web Console(31978): *********** finish ********* at file:///android_asset/www/js/index.js:50
    D/DroidGap(31978): Paused the application!
    D/CordovaWebView(31978): Handle the pause
    D/OpenGLRenderer(31978): Flushing caches (mode 0)
    D/OpenGLRenderer(31978): Flushing caches (mode 1)
    D/DroidGap(31978): onDestroy()
    D/CordovaWebView(31978): >>> loadUrlNow()
    W/IInputConnectionWrapper(31978): showStatusIcon on inactive InputConnection
    D/DroidGap(31978): DroidGap.onCreate()
    D/CordovaWebView(31978): Origin to allow: http://127.0.0.1*
    D/CordovaWebView(31978): Origin to allow: .*
    I/CordovaLog(31978): Found log level DEBUG
    I/CordovaLog(31978): Changing log level to DEBUG(3)
    I/CordovaLog(31978): Found preference for useBrowserHistory=false
    D/CordovaLog(31978): Found preference for useBrowserHistory=false
    I/CordovaLog(31978): Found preference for exit-on-suspend=false
    D/CordovaLog(31978): Found preference for exit-on-suspend=false
    D/JsMessageQueue(31978): Set native->JS mode to 2
    D/DroidGap(31978): DroidGap.init()
    D/CordovaWebView(31978): >>> loadUrl(file:///android_asset/www/index.html)
    D/PluginManager(31978): init()
    D/CordovaWebView(31978): >>> loadUrlNow()
    D/DroidGap(31978): Resuming the App
    D/SoftKeyboardDetect(31978): Ignore this event
    W/webcore(31978): java.lang.Throwable: EventHub.removeMessages(int what = 107) is not supported before the WebViewCore is set up.
    W/webcore(31978): at android.webkit.WebViewCore$EventHub.removeMessages(WebViewCore.java:1691)
    W/webcore(31978): at android.webkit.WebViewCore$EventHub.access$7900(WebViewCore.java:926)
    W/webcore(31978): at android.webkit.WebViewCore.removeMessages(WebViewCore.java:1803)
    W/webcore(31978): at android.webkit.WebView.sendOurVisibleRect(WebView.java:2924)
    W/webcore(31978): at android.webkit.ZoomManager.setZoomScale(ZoomManager.java:593)
    W/webcore(31978): at android.webkit.ZoomManager.access$1700(ZoomManager.java:49)
    W/webcore(31978): at android.webkit.ZoomManager$PostScale.run(ZoomManager.java:984)
    W/webcore(31978): at android.os.Handler.handleCallback(Handler.java:605)
    W/webcore(31978): at android.os.Handler.dispatchMessage(Handler.java:92)
    W/webcore(31978): at android.os.Looper.loop(Looper.java:137)
    W/webcore(31978): at android.app.ActivityThread.main(ActivityThread.java:4441)
    W/webcore(31978): at java.lang.reflect.Method.invokeNative(Native Method)
    W/webcore(31978): at java.lang.reflect.Method.invoke(Method.java:511)
    W/webcore(31978): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    W/webcore(31978): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    W/webcore(31978): at dalvik.system.NativeStart.main(Native Method)
    D/SoftKeyboardDetect(31978): Ignore this event
    D/DroidGap(31978): onMessage(onPageStarted,file:///android_asset/www/index.html)
    D/Cordova(31978): onPageFinished(file:///android_asset/www/index.html)
    D/DroidGap(31978): onMessage(onNativeReady,null)
    D/DroidGap(31978): onMessage(onPageFinished,file:///android_asset/www/index.html)
    D/DroidGap(31978): onMessage(networkconnection,wifi)
    D/DroidGap(31978): onMessage(spinner,stop)
    D/DroidGap(31978): onMessage(spinner,stop)
    D/DroidGap(31978): Paused the application!
    D/CordovaWebView(31978): Handle the pause
    D/OpenGLRenderer(31978): Flushing caches (mode 0)
    W/IInputConnectionWrapper(31978): showStatusIcon on inactive InputConnection

    thanks and regard

    ReplyDelete
  47. Simon MacDonaldFebruary 22, 2013 at 1:48 PM

    @ALMORA DEV

    What are your configChanges set to in the manifest.xml? Put it up on gist or pastebin.

    ReplyDelete
  48. UnknownFebruary 22, 2013 at 2:59 PM

    sorry, thanks in advance, you are helping me a lot

    ReplyDelete
  49. Simon MacDonaldFebruary 22, 2013 at 3:04 PM

    @ALMORA DEV

    I rejected your last comment as you can't post xml in blogger it doesn't show up. Put it up on gist or pastebin like I said.

    ReplyDelete
  50. UnknownFebruary 25, 2013 at 1:17 AM

    sorry for the delay. This is the two manifiest.

    http://pastebin.com/hjjnhzje

    the config

    http://pastebin.com/6yKf7WMe

    thanks.

    ReplyDelete
  51. Simon MacDonaldFebruary 25, 2013 at 11:12 PM

    @ALMORA DEV

    Nothing is jumping out at me here.

    ReplyDelete
  52. UnknownFebruary 28, 2013 at 9:43 PM

    Hi Simon,

    For the past 3 months we don't have the problem on barcode scan, but just today. When I click the button scan on our app which is installed in Nexus 7 (android 4.2). It shows
    "Sorry,the Android camera encountered a problem.You may need to restart the device."

    ReplyDelete
  53. Simon MacDonaldMarch 3, 2013 at 11:42 PM

    @Jeoffrey Galbizo

    Have you tried the latest version of the plugin? A lot of folks have had problems with the barcode scanner and the Nexus 7 but I don't have one to test.

    ReplyDelete
  54. UnknownMarch 6, 2013 at 1:17 AM

    opps sorry for late reply.
    i figured it out by installing the zxing barcode scanner app, it won't work the scanner if you scan on front camera. nexus 7 has no camera on back.

    thanks.

    ReplyDelete
  55. AnonymousMarch 9, 2013 at 10:28 AM

    hey simon, the library is perfectly working in emulator and few devices, but in few device like samsung GT-1900 the app is being hanged after the scan, and nothing can be done except force exit :(. please help me with this asap!

    ReplyDelete
  56. Simon MacDonaldMarch 9, 2013 at 9:28 PM

    @Shiva Acharjee

    What are you seeing in "adb logcat" when you hang the app?

    ReplyDelete
  57. SAVIOURApril 11, 2013 at 9:05 AM

    Hi @simon,
    I imported your com.simonmacdonald.scan.BarcodeScanner prject to my work space and i got
    [2013-04-11 18:27:10 - com.simonmacdonald.scan.BarcodeScanner] Unable to resolve target 'android-16' as error can you please help me. Thank u in advance

    ReplyDelete
  58. Simon MacDonaldApril 11, 2013 at 10:08 AM

    @SAVIOUR

    Start your Android SDK Manager and download API level 16.

    ReplyDelete
  59. sapna raiApril 22, 2013 at 6:48 AM

    Hi, Simon
    your Barcode_scanner project working fine on my android device(2.3),but it is not scanning any barcode.
    i m just find a rectangular view to scan barcode but it is not working.
    plz reply asap.

    ReplyDelete
  60. Simon MacDonaldApril 22, 2013 at 11:22 AM

    @sapna rai

    Some older devices had pretty bad cameras that can't possibly focus on the barcode. What are you seeing in "adb logcat"?

    ReplyDelete
  61. sapna raiApril 22, 2013 at 12:34 PM

    @Simon MacDonald : thanks for reply..actually it is not scanning any barcode.On focussing the rectangular view over any barcode, I don't get any result and any message..Do I need to write some additional codes?...Do help me..

    ReplyDelete
  62. SAVIOURApril 24, 2013 at 2:48 AM

    Hi Simon;I got error in com.simonmacdonald.scan.BarcodeScanner android manifest
    ""

    error: Error: No resource found that matches the given name (at 'label' with value '@string/
    share_name').

    ReplyDelete
  63. Simon MacDonaldApril 24, 2013 at 11:02 PM

    @sapna rai

    See previous reply.

    ReplyDelete
  64. Simon MacDonaldApril 28, 2013 at 10:56 PM

    @SAVIOUR

    It sounds like you haven't added the library project to your project.

    ReplyDelete
  65. UnknownMay 10, 2013 at 5:11 AM

    Hi Simon,


    How can I redirect to another html page after scanning a QR?

    Right now it is just showing "Found URL" and redirect itself back to the main index.html.

    Which part of code I should look into?

    I'm using the LibraryProject vers 2.2.0 and your current example project from this post, with updated barcodescanner.js and BarcodeScanner.java from 2.2.0.


    Thanks in advance!

    Karen

    ReplyDelete
  66. Simon MacDonaldMay 10, 2013 at 11:11 AM

    @Karen Wong

    In the success callback for the scan you can take the url returned and open the web page.

    ReplyDelete
  67. UnknownMay 16, 2013 at 1:30 AM

    Sir, your barcode scanner is absolutely perfectly working, we've used the app for almost a year but today, I compile eclipse project with the latest version cordova 2.7.0. All of a sudden BarcodeScanner.java got an error "cordova cannot resolved or is not a field" and "Plugin cannot be resolve to a type". I configured build path, search google but still got the error.

    ReplyDelete
  68. Simon MacDonaldMay 16, 2013 at 11:04 AM

    @Jeoffrey Galbizo

    The Plugin class was deprecated in favour of CordovaPlugin. You'll need to update your BarcodeScanner plugin to the 2.2 version.

    https://github.com/phonegap/phonegap-plugins/tree/master/Android/BarcodeScanner/2.2.0

    ReplyDelete
  69. Chris MartinezMay 27, 2013 at 12:45 PM

    Hi Simon, I hope you can help me. I just started using PhoneGap and have installed the latest Phonegap version and BarcodeScanner, I can get the app running, but it crashes as soon as it recognizes the bar code with the following error:

    java.lang.RuntimeException: Unable to resume activity {com.csmcommunication.MediaLib/com.csmcommunication.MediaLib.MediaLib}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=195543262, result=-1, data=Intent { act=com.phonegap.plugins.barcodescanner.SCAN flg=0x80000 (has extras) }} to activity {com.csmcommunication.MediaLib/com.csmcommunication.MediaLib.MediaLib}: java.lang.NullPointerException. I tried downloading your sample projects, but am looking through the code and everything seems to the same. Any thoughts? Please let me know if you need me to send anything.. Thanks in advance for your help.
    - Chris

    ReplyDelete
  70. Chris MartinezMay 27, 2013 at 1:06 PM

    Hi Simon, Um. Yeah, you must be magic - I got it working. Thanks! - Chris

    ReplyDelete
  71. UnknownJune 19, 2013 at 8:30 AM

    Hey Simon. Looks like a great project!

    I am struggling with one problem though: When I am exporting the whole thing to Android apk I get this error :"conversation to dalvik format failed with error 1".
    I checked your recent solution for this error and that's not working for me(I don't have jar conflict). Also checked if there any conflicting class and couldn't figure it out. any ideas?

    ReplyDelete
  72. UnknownJune 19, 2013 at 6:16 PM

    Is there any chance you could let us know how to set the barcode scanner up in Android Studio im struggling to figure out how to import the project thanks

    ReplyDelete
  73. Simon MacDonaldJune 25, 2013 at 3:47 PM

    @Lee Doel

    Sorry I haven't had the chance to upgrade them for Android Studio.

    ReplyDelete
  74. Simon MacDonaldJune 25, 2013 at 3:50 PM

    @Yonatan Wolowelsky

    Without seeing your project I can only point to the most likely cause which would be two jars that include the same classes.

    ReplyDelete
  75. JeffJune 30, 2013 at 9:12 PM

    Hi Simon -

    I've imported both zip files into Eclipse and I can do a Run As to my tablet, but I get "Unfortunately, BarcodeScanner has stopped." I don't know what to do next.

    Thanks,
    Jeff

    ReplyDelete
  76. Simon MacDonaldJuly 2, 2013 at 1:28 PM

    @Jeff

    What do you see in "adb logcat"?

    ReplyDelete
  77. UnknownAugust 12, 2013 at 5:18 AM

    Hi Simon,

    I have imported second zip file into Eclipse and when I run it on my phone or emulator, But I get "Unfortunately,I get Barcode Scanner stopped".

    Logcat error message shows " Class NOT FOUND EXCEPTION" unable to instantiate the activity.

    ReplyDelete
  78. Simon MacDonaldAugust 12, 2013 at 9:51 AM

    @Shraddha Pandey

    What class is missing? Did you remember to add the library project to your app in the properties->android section of Eclipse?

    ReplyDelete
  79. UnknownAugust 16, 2013 at 2:13 AM

    sir , i am new to phone gap and hybrid applications,i have implemented this natively,now i want to this in a hybrid way, so i download and imported this code to eclipse but i am getting error in manifest file as :


    Description Resource Path Location Type
    error: Error: No resource found that matches the given name (at 'label' with value '@string/share_name'). AndroidManifest.xml /com.simonmacdonald.scan.BarcodeScanner line 74 Android AAPT Problem

    ReplyDelete
  80. xyzAugust 30, 2013 at 11:48 AM

    Demo app seems doesn't build with API 18. I must use API 16?

    ReplyDelete
  81. xyzAugust 30, 2013 at 12:03 PM

    Tried on a real device I got this:

    08-30 18:01:14.329: D/dalvikvm(7082): Late-enabling CheckJNI
    08-30 18:01:15.639: E/Trace(7082): error opening trace file: No such file or directory (2)
    08-30 18:01:15.699: V/ActivityThread(7082): com.simonmacdonald.scan white listed for hwui
    08-30 18:01:16.109: W/dalvikvm(7082): Unable to resolve superclass of Lcom/simonmacdonald/scan/BarcodeScanner; (534)
    08-30 18:01:16.109: W/dalvikvm(7082): Link of class 'Lcom/simonmacdonald/scan/BarcodeScanner;' failed
    08-30 18:01:16.109: D/AndroidRuntime(7082): Shutting down VM
    08-30 18:01:16.109: W/dalvikvm(7082): threadid=1: thread exiting with uncaught exception (group=0x40b43930)
    08-30 18:01:16.229: E/AndroidRuntime(7082): FATAL EXCEPTION: main
    08-30 18:01:16.229: E/AndroidRuntime(7082): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.simonmacdonald.scan/com.simonmacdonald.scan.BarcodeScanner}: java.lang.ClassNotFoundException: Didn't find class "com.simonmacdonald.scan.BarcodeScanner" on path: /data/app/com.simonmacdonald.scan-1.apk
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2224)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread.access$600(ActivityThread.java:153)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.os.Handler.dispatchMessage(Handler.java:99)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.os.Looper.loop(Looper.java:137)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread.main(ActivityThread.java:5260)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at java.lang.reflect.Method.invokeNative(Native Method)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at java.lang.reflect.Method.invoke(Method.java:511)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at dalvik.system.NativeStart.main(Native Method)
    08-30 18:01:16.229: E/AndroidRuntime(7082): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.simonmacdonald.scan.BarcodeScanner" on path: /data/app/com.simonmacdonald.scan-1.apk
    08-30 18:01:16.229: E/AndroidRuntime(7082): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
    08-30 18:01:16.229: E/AndroidRuntime(7082): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2215)
    08-30 18:01:16.229: E/AndroidRuntime(7082): ... 11 more
    08-30 18:01:20.279: I/Process(7082): Sending signal. PID: 7082 SIG: 9

    What's wrong?

    Thanks.

    ReplyDelete
  82. Simon MacDonaldSeptember 2, 2013 at 6:54 PM

    @nutella

    I built against sdk 18 and ran it on my Nexus 4 running Androd 4.3 (sdk 18) without any problems.

    ReplyDelete
  83. Simon MacDonaldSeptember 2, 2013 at 7:08 PM

    @omkar kulkarni

    Right click on the project, select properties, select Android then look down the bottom at the Library section. It is either missing the library project or has the wrong name.

    ReplyDelete
  84. Yoann EstepaSeptember 18, 2013 at 8:21 AM

    Hey Simon! Great blog! It sure has been useful for me since I started working with phonegap.

    Is there any chance you could help me using the BarcodeScanner Plugin? I installed it and the scan seems to work fine (camera launching and QRCode detected). But when I try to obtain the result using the classic success function, it's empty and the result code is return_cancelled.

    I am using phonegap 3.0. Would you have any idea to where I should look?

    Thanks in advance,

    Yoann

    ReplyDelete
  85. Simon MacDonaldSeptember 30, 2013 at 11:40 AM

    @Yoann Estepa

    What do you see in "adb logcat"?

    ReplyDelete
  86. UnknownJanuary 31, 2014 at 6:28 AM

    I tried the barcode scanner example but the LogCat shows a reference error in index.html:

    file:///android_asset/www/index.html: Line 31: Uncaught Reference error: app is not defined

    Thanks, Jos

    ReplyDelete
  87. Simon MacDonaldFebruary 4, 2014 at 2:18 PM

    @Jos Hendriks

    Something has gone wrong before this point as it does not appear that the linked in JS files got loaded. That should be the only way app is not setup.

    ReplyDelete
  88. UnknownFebruary 11, 2014 at 7:29 AM

    hi simon,
    thanks for this best tutorial and other examples.

    well i have android phone with both kind of camera (front and back) n

    now i want to use only front camera to scan QR code using barcode scanner but its not working, it alwasys uses back camera.

    can you plz, give me some advice ?

    Thanks buddy

    ReplyDelete
  89. Simon MacDonaldFebruary 11, 2014 at 11:59 AM

    @Jayesh Vadgama

    You'd have to dig into the ZXing library code in order to enable front camera support.

    ReplyDelete
  90. Muthu karunarathnaJune 7, 2014 at 10:35 AM

    Thank you so much..it was big help for my project..keep it up your great works..!!!

    ReplyDelete