[android-developers] VpnService and simple packet capture mechanism?
I'm considering the possibility of using the new android (4.0) VpnService interface to implement a non-root-required packet capture utility. Would it be possible to implement a VpnService such that each packet it received from the device could be written to a file for subsequent analysis and then simply sent on to the active network device for proper delivery? A normal VPN implementation would have a finite number of connections to a vpn server to which all packets should be written. In my case, I'd just want to send the packets along without the server to talk to. Is this feasible or would OS permissions prevent writing the packet to the active network? If it is possible, what APIs could I use to write to the network device(s)? Advice appreciated. -Mike Ellery -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Questions about VpnService
On Dec 20 2011, 1:13 pm, Lysandus imbroke...@gmail.com wrote: I have a couple questions aboutVpnService. Is theVpnServiceadded in 4.0 only for creating a vpn connection for your app, or does it make the vpn for all traffic on the device? If it's all device traffic does that mean your app can analyze things like what websites the user is visiting? Can it be used to just add a new vpn to the device and not have the traffic go through your app? Thanks. A VpnService implementation should receive all network traffic from the device, not just your application traffic. For this reason, there can only be ONE vpn active at a given time (either a custom impl using VpnService OR one of the stock android legacy VPNs). The ParcelFileDescriptor that you get in VpnService allows you to read/ write packets to/from the device. In theory you should be able to inspect these packets and analyze. As far as I know, custom VPN implementations using VpnService DO NOT show-up in the standard VPN configuration settings on the device...and you actually have to create the client UI code to activate your custom VPN as well. -Mike -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: verizon galaxy nexus as dev phone?
On Dec 19, 1:18 pm, Romain Guy romain...@android.com wrote: You don't need to have an unlocked phone to install and debug apps. A bootloader unlocked phone is only useful if you plan on modifying the system itself. -- Romain Guy Android framework engineer romain...@android.com There's another case that comes immediately to mind: tcpdump. Sometimes I find it incredibly useful to tcpdump on my phone and capture something for later analysis. The Sharkdump tools let you do this quite easily, but require root because of the device-level access requirements. In any event, that's a case where I don't so much want to modify my system as *observe* it. -Mike Ellery -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Docs: TestSuite - createTest
Can anyone else make sense of this description for the createTest method? http://developer.android.com/reference/junit/framework/TestSuite.html#createTest(java.lang.Class,%20java.lang.String) I was trying to figure out how to dynamically create test suites and cases at runtime (data driven tests), and this documentation threw me for a loop. -Mike Ellery -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: How to read data off a website into an Android app
well, I think you'd want to start with an HttpClient (http:// developer.android.com/reference/android/net/http/ AndroidHttpClient.html) to make the request and download the resource(s). Then you would need to extract the information you need from the content. This is commonly called scraping since you are trying to extract data from presentation views. It's hairy, and likely to involve any number of parsers or (gads!) regular expressions to accomplish the task. I'd avoid this route if at all possible. If the service you are accessing actually intends for other applications to consume it, perhaps there is already a public API (e.g. twitter, facebook, etc. all have http APIs you can use). At the very least, perhaps the site supports alternative formats for the content - like xml or json. If requesting a different format is an option, you'll have a much easier time extracting the data since you can use a standard parser. -Mike -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: How to read data off a website into an Android app
well, you're not going to be able to (easily) read Excel files on android (xls, or whatever they are called these days), but csv will probably work - perhaps that's what you were thinking of anyhow. Have a look at http://groups.google.com/group/android-developers/browse_thread/thread/cec5eb668e3293fe for discussion about loading csv. Once you've fetched the file using the http client, opencsv should be able to parse/load it. -Mike On Nov 15, 3:50 pm, Jungle Jim jjjungle...@gmail.com wrote: One more question: I also want to be able to put some data (perhaps in Excel spreadsheet format, but not restricted to that) somewhere on the web and have my app read that data. This way I can periodically revise the data that shows on the apps that my customers have installed on their phones. Any ideas on the best way to do that? On Nov 15, 3:44 pm, mellery451 mellery...@gmail.com wrote: well, I think you'd want to start with an HttpClient (http:// developer.android.com/reference/android/net/http/ AndroidHttpClient.html) to make the request and download the resource(s). Then you would need to extract the information you need from the content. This is commonly called scraping since you are trying to extract data from presentation views. It's hairy, and likely to involve any number of parsers or (gads!) regular expressions to accomplish the task. I'd avoid this route if at all possible. If the service you are accessing actually intends for other applications to consume it, perhaps there is already a public API (e.g. twitter, facebook, etc. all have http APIs you can use). At the very least, perhaps the site supports alternative formats for the content - like xml or json. If requesting a different format is an option, you'll have a much easier time extracting the data since you can use a standard parser. -Mike -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Dynamic test cases / data driven testing in android unit test
I'm trying to get starting with unit testing my android application and I'm having trouble figuring out how to do data driven testing. For my particular case, I have a file that I'm storing as an asset and this file has input and expected output for a particular API under test. I can read the file and make the calls just fine. I would like to create a test case for each item (line) in the file - this is where I'm stuck. I have no idea how to accomplish with the classes I have in the android framework. I'm using the InstrumentationTestCase class and the InstrumentationTestRunner (the default) to run my tests. I've seen some reference to a JUnit-3 pattern for doing this that involves creating a static suite() method in your test class. The suite() method then creates a suite and adds test cases to it at runtime. I tried adding such a method to my test class, but it never seems to get called. Has anyone out there successfully implemented data driven tests in android? Any advice appreciated. -Mike Ellery -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] How to call native (JNI) code from test application
I'm building an app and I have a corresponding test application for it. One of the first items I have added is some native code for a well- encapsulated computation (hashing). I now want to test this native code from my test application. I've imported the JNI wrapper class into my InstrumentationTestCase based test class - and with that, I'm able to compile the application. However, at runtime (running the tests) I get an UnsatisfiedLinkError thrown when the test tries to invoke the native method. Does anyone know to call native code from a test app? Do I need to somehow force the native library to be part of the test application so that it can be loaded? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: How to call native (JNI) code from test application
argh - you are correct. I just checked the LogCat output and I now see that the library is in-fact being loaded, but the method call itself is failing to resolve. Upon further inspection, it turns out I renamed my method but forgot to rename it in the native implementation file. Fixed that and now it's working. Thanks for your help. -Mike On Oct 28, 10:57 am, Studio LFP studio@gmail.com wrote: The static initializer of your Java wrapper should be loading the library. Do you have a System.loadLibrary() call in there? If you do, make sure you have copied the .so file into the proper location in the libs directory of your project. Steven Studio LFPhttp://www.studio-lfp.com On Friday, October 28, 2011 12:46:58 PM UTC-5, mellery451 wrote: I'm building an app and I have a corresponding test application for it. One of the first items I have added is some native code for a well- encapsulated computation (hashing). I now want to test this native code from my test application. I've imported the JNI wrapper class into my InstrumentationTestCase based test class - and with that, I'm able to compile the application. However, at runtime (running the tests) I get an UnsatisfiedLinkError thrown when the test tries to invoke the native method. Does anyone know to call native code from a test app? Do I need to somehow force the native library to be part of the test application so that it can be loaded? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: how to transfer file from android device to another android device using WIFI
On Oct 20, 5:46 am, Kristopher Micinski krismicin...@gmail.com wrote: (It seems like people ask about this a lot, maybe somebody could make money off of creating a web service and then charging a modest licensing fee?) I think bump (http://bu.mp/) provides this. There are probably other options as well. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: I want to know how can I make the cell take input from the soft keypad ?
hmm - seems like you might want to just add a TableLayout (http:// developer.android.com/guide/topics/ui/layout-objects.html#tablelayout) to your main view at runtime and then create EditText controls in each TableRow. Of course, if your layout can be static (fixed number of rows/cols), then you can just do all this in the layout XML file. -Mike On Oct 13, 10:01 am, sunny ash.b...@gmail.com wrote: Hi, I am a newbie to Android development. I have created a grid of rows x columns by creating a class which extends a View and then painting the grid lines on the canvas. Then I was able to pop up the soft keypad when a user touches any cell on the grid. 1) I want to know how can I make the cell take input from the displayed soft keypad. eg :- I type 'A' on the soft keypad, then the alphabet 'A' should be shown in the selected cell. I am unable to achieve this. 2) How can I achieve horizontal fling on the grid so that I can scroll horizontally ? Thanks, -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Help Understanding Security Exception
I'm seeking some help in understanding the possible reasons of the following error : Caused by: java.lang.SecurityException at android.os.BinderProxy.transact(Native Method) at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java: 146) at android.os.ServiceManager.addService(ServiceManager.java:72) at android.net.vpn.VpnManager.startVpnService(VpnManager.java: 102) I'm getting and exception in my code when I try to start the VPN service on a 3.2 tablet device. Oddly, I don't get this error on a 2.2 device. Is this indicative of insufficient permissions for my application? Or perhaps some other system level restriction on starting the VPN service? Advice appreciated. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Help Understanding Security Exception
Hello, I'm looking for some advice understanding the cause of the following exception in my app: Caused by: java.lang.SecurityException at android.os.BinderProxy.transact(Native Method) at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java: 146) at android.os.ServiceManager.addService(ServiceManager.java:72) at android.net.vpn.VpnManager.startVpnService(VpnManager.java: 102) This is happening on a 3.2 tablet when I attempt to start the VPN service, whereas the same code/app runs fine on a 2.2 device (phone). What is the root cause of such an exception? Does anyone know if 3.x has added restrictions to prevent apps from starting the VPN system service? Advice appreciated. -Mike Ellery -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: ADB could see Samsung Galaxy Tab 10.1 but now it can't!
I have often had to restart the adb daemon on my ubuntu box with root privs. - so often, in fact, that I have a little shell script with the following commands: /opt/android/android-sdk-linux_86/platform-tools/adb kill-server /opt/android/android-sdk-linux_86/platform-tools/adb start-server ...which I run as root. If the adb server was started with a user other than root (often happens under eclipse, for instance), then you will typically not be able to connect to the device. Maybe give those commands a shot if/when this happens again. -Mike -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: can you switch screen orientation via an app?
On Sep 8, 1:42 pm, Jim Graham spooky1...@gmail.com wrote: Does anyone know if this is possible? And if so, can you point me to the right terms to search for in the dev guide? I've only got a few days to write this before I have to go into the hospital for cancer surgery, and I'd like to have it working before then well, there appears to be a manifest permission for that: http://developer.android.com/reference/android/Manifest.permission.html#SET_ORIENTATION I'm not sure how to take advantage of this in the code, however. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
