As an additional anti-pirating strategy, I'd like to compute a checksum on my application at runtime. Since my app communicates with a back-end server, I can send the checksum with each message and the server can deny service to altered apps. Not a complete solution to piracy by any means, but a fairly easy way to raise the bar. Anyone know how an app can get access to it's load image at runtime?
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A while ago I tried to work out how to checksum a function at runtime. As I remember, I failed due to some missing functionality of the class loader from vanilla java. Has anyone managed to do this ?
View 2 Replies View RelatedHow do I keep track of the runtime of an application.
View 2 Replies View RelatedMy application update some jar files,I want runtime load jar files or any idea?
View 2 Replies View RelatedTo facilitate diagnostics while the app has been deployed, does Android provide any API to facilitate runtime logging? It would be ideal if the app could retrieve all the messages it wrote to the Logging System via the Log API functions.
View 6 Replies View RelatedIn my application I want to create a directory xyz in sdcard at the runtime from the my Application. But it doesn't work.
Here is my code...............
is there a way to programmatically configure orientation in android application at runtime ?
(I want to allow portrait in phones and portrait/landscape in tablets)
i get following error, if i test my app on a real android phone. On the emulator, my app works fine.
W/dalvikvm( 321): threadid=3: thread exiting with uncaught exception (group=0x4000fe70) E/AndroidRuntime( 321): Uncaught handler: thread main exiting due to uncaught exception E/AndroidRuntime( 321): java.lang.VerifyError: de.stefandahmen.android.TourList E/AndroidRuntime( 321): at java.lang.Class.newInstanceImpl (Native Method) E/AndroidRuntime( 321): at java.lang.Class.newInstance (Class.java:1472) E/AndroidRuntime( 321): at android.app.Instrumentation.newActivity(Instrumentation.java:1097) E/AndroidRuntime( 321):.....
Basically i want to start Notepad application in android from my application , can i do this in android using runtime.exec() method of RuntimeClasss and assign it to a process and kill the process later.
View 8 Replies View RelatedHi, I want to create an application in android which at runtime calls an xml file from some path of the system.And make that contents of the xml file run in the same application.Could i get a feasible code because at runtime the bytecode of the activity is already created.how do i compile and run the activity and runtime.Also i was facing problem reading the xml file.Need some suggestions asap.. Thanx in advance!!
View 3 Replies View RelatedI am calling a method of another .apk file dynamically at runtime in my application. I can execute it successfully if method does not contain any variable which is defined outside of that method.
But if I am using the variables which are defined outside that method ( in the same activity or same .apk) then my application throws "java.lang.reflect.InvocationTargetException" at runtime.
For e.g. if method defines as ,
COE:...................
1) I am developing my app in Eclipse 3.4.1 with Android (ver 1.1_r1) plugin. My app compiles and executes without errors when using the Eclipse IDE.
However, when I export my app (unsigned) using Eclipse (via {select project} >right-click>Android tools>export unsigned application package), sign it, and try to run it on the Emulator, it throws a runtime error when I try to update my sqlite database, at which time the specific error created is: SQLite error#14, unable to open database. It is able to read from the database without problems. (I have also verified that the database is: open, is not readonly, is not locked by another thread, is not in the middle of a transaction.)
I have limited experience, but this seems more like a "system" problem given that the app works OK in Eclipse IDE but then fails as an exported/signed apk. Some googling of SQLite resources revealed a similar error on a non-Android platform which was fixed by: "Set your permissions correctly on /var/tmp, or whatever directory you are using to hold temporary files".
Does Android have temporary files, and if so how does it handle permissions on temporary files? Is there a way to check or set these permissions to see if this fixes my problem here?
2) Not sure if it is related, but after I have run the exported/signed app which causes the runtime error, if I reboot the Emulator, and try to run the program using the Eclipse IDE , the program fails with the same exact error. PLUS I also noticed the following error message while the program is installing/running: 03-01 22:22:29.282: ERROR/PackageManager(53): Package com.northwestradiology has mismatched uid: 0 on disk, 10019 in settings; read messages:
I can restore the Eclipse version of my program to be able to execute without runtime errors by utilizing the -wipe-data option for the emulator. But note that if I run my signed APK using an emulator created with the -wipe-data option, it still throws the runtime error listed above...
Following the examples given by Johns Trevor in order to secure Android LVL Applications (http://android-developers.blogspot.com/ 2010/09/securing-android-lvl-applications.html), I've been stuck on one only particular issue. Indeed, here is the matter: The most obvious mechanism is to use a lightweight hash function, such as CRC32, and build a hash of your application's code. You can then compare this checksum with a known good value. You can find the path of your application's files by calling context.GetApplicationInfo() - just be sure not to compute a checksum of the file that contains your checksum! (Consider storing this information on a third-party server.)
Howether, I can't find what I must use in my code to detect an "unwanted" modification inside it.
java.util.zip.CRC32 crc32 = new java.util.zip.CRC32();
crc32.update(whatPutInHere);
I've tried many method related to context.GetApplicationInfo() but no one seems to deliver something that change as soon as the code is modified. Has someone already succeed on CRC32 checksum implementation?
How do i check MD5 Checksum before flashing a rom?
View 2 Replies View RelatedOn-Phone ROM Checksum Verifier
Download: MD5-Checksum-v2.2.apk (new version!)
Changes in the 2.2 version include:
1. Larger rows and font for easier/better file-selection
2. Sorted list of files displayed in file-selector
3. Retain directory between each file-selection
4. Verify read-access of selected file to prevent force-close
5. Test file's suffix to warn if non jar-type file is selected for jar-verification
6. Add menu support (help, change log, acknowledgements)
Download: MD5-Checksum-v2.1.apk
This version is detailed in a post over at XDA (xda-developers - View Single Post - [Begging] Devs - please publish your MD5's) but its highlights are as follows:
- Still includes all of the functionality of the previous versions
- Now includes two jar file verification functions (they both basically do the same thing; radio button JV1 selects an explicit jar verification (read jar, calculate SHA1 digest, compare to manifest); radio button JV2 just uses the implicit JarFile Java method of jar verification and is much faster since its not doing a second, separate validation (23 seconds for method JV2 on a 100MB ROM vs. 2.5 minutes for method JV1 (all on my Droid X)).
- Now has a file-selector instead of requiring manual filename text input (you can still do this too)
Download: MD5 Checksum v1.1.apk (free!)
Download: checksumdb.txt (save to either /sdcard/download or /sdcard)
[Code]
I have currently been testing the method of rooting leaked 2.1 phones. There was a little discussion running in that thread (and other threads, I've found) that poses the question whether or not the RUU is the same as 2.1 Leak v3. The RUU I'm using is referenced here: [ROM] Official HTC Desire RUU ROMS and OTA Update URLs - xda-developers - which can be found here:
http://shipped-roms.com/shipped/Desire/RUU_Desire_C_Verizon_WWE_2.36.605.1_release_signed _with_driver.exe
Leak 2.1 v3 I'm using is referenced here: HTC DROID Eris OS 2.1v3 download -- which can be found here: PB00IMG.zip. So, the process that I've been using to root these phones involves flashing the RUU OTA onto the phone. With some help from user bftb0, I have taken the time to do the analysis. How did I get system.img and boot.img off of the RUU OTA, you might ask? Well, after I flashed the RUU OTA onto the phone, I went through the Incredible/Slide root method to root the phone I'm working with (without changing any phone settings within Sense).
After getting adb to recognize the device in recovery, I took the steps necessary to flash Amon_RA's recovery. I then took a Nandroid backup of my phone and extracted the system.img and boot.img files off of the SD card where the Nandroid backup was stored. Then, I used unyaffs to unpack system.img into 2 separate directories, and used split_bootimg.pl to unpack boot.img. So, for split_bootimg.pl I did this, starting at the directory where each respective boot.img file is:
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I just spent half an hour going through each file in the OTA upgrade ZIP and comparing its CRC (checksum) to the same exact file in the "leak v3" PB00IMG.ZIP, including all of the files inside system.img. Process: First off, just by opening the two ZIP files with 7-Zip I can see that the boot.img, radio.img, and recovery.img are identical. In both ZIPs, their CRCs are EA7388FA, 54C41EEC, and 3F0153F1 respectively.
Since the OTA breaks down system.img into just the files that need updating (for the purpose of keeping the file size as low as possible), the only way to compare the files with system.img in "leak v3" was to use the root ROM created from "leak v3". (Thank goodness there's an unadulterated ROM of it, so the original CRCs are intact!) One by one, I compared the CRCs of the files in the OTA's system folder with the same files in the "leak v3" system folder. Findings: The files that are in the OTA are completely identical to the ones in the leak v3 system.img, with only one exception: The OTA contains an additional app called UpgradeSetup.apk. Obviously, it's only necessary for executing the upgrade..............
Using Rom Manager, Clockwork recovery, on any ROM, currently Pete's V1. I have yet to successfully restore a previously backed up ROM without getting the MD5 checksum error. I've tried both from inside Rom Manager, manage backups, and booting into recovery and hitting the backup directory. File names are left at default, as 2010-05-02-02.42.46. Frustrating as I wind up having to start from scratch if a ROM install fails.
View 11 Replies View Relatedhave an iBall Andi 3n here. Runs on MediaTek MT6575 SoC. Getting this error while flashing stock rom.
View 1 Replies View RelatedAnyone know an easy way to check the md5 checksum on a file downloaded with windows (xp)?
View 3 Replies View Relatedi'm trying to know the database space available. In J2ME you have getSizeAvailable(), but there is no direct replacement in Android, so i thought about doing getMaximumSize() minus database size, the thing is i just can't find a way to know the db actual size, at runtime.
View 1 Replies View RelatedHow to add items to a ListView in Android during runtime?
View 1 Replies View RelatedI'm just getting started with developing for Android. I'm looking to port one of my iPhone applications, but I'm kind of at a loss for how to draw a view at runtime (a view not declared in the XML). Basically, I want to draw a simple rectangle, but then be able to manipulate its frame after being drawn. Sorry if this is a really, really simple question, but I can't seem to find some equivalent to the iPhone SDK here.
View 1 Replies View RelatedIn my tableview i need to add the scroll view for the particular rows . Is there any way to create like this in android?
View 1 Replies View RelatedI want to create n number of rows at runtime after clicking button and 2 number of columns for each rows. I had tried but can't succeed. Anybody knows how to do this?
View 4 Replies View RelatedI've been trying to use a mapView in my app, and have been following the tutorial; http://developer.android.com/resources/tutorials/views/hello-mapview. Code...
View 5 Replies View RelatedIs it possible to load my main.xml layout file in onCreate() and then later in the app, switch to a new XML layout? I've tried placing setContentView() later on in the app but that seems to not actually set the new View because my references to objects in the newly set xml layout file are returning as null. I've tried doing some layout inflating using the LayoutInflater but I'm having no luck (I'm probably doing something wrong)... So is there any other way to swap layout xml layouts at runtime?
View 3 Replies View RelatedIs there a way to set a style for a View at runtime? I've seen this question a few times on the board here but no answers, so probably not:
<ImageView android:id="@+id/blah" style="@style/mystyle" />
// later... ImageView iv = (ImageView)findViewById(...);
iv.setStyle(R.style.myotherstyle);
Is it not possible to do something like this? We have to manually change everything in code instead?
I receive data from udp server from my application.when i receive data i have to show that on the screen.I just use the Textview to display the incoming data(textview.setText ("data")).But it displays the last incoming data only.I need to show the previous data also.how to solve this? DatagramSocket clientsocket=new DatagramSocket(6363); byte[] receivedata=new byte[1024];while(true)DatagramPacket recv_packet=new DatagramPacket (receivedata, receivedata.length);textview.setText("UDP S: Receiving");clientsocket. receive(recv_packet);String rec_str=new String(recv_packet.getData()); textview.setText (" Received String "+rec_str); when i use append method it display's after all the incoming finished. I need to view when the data is coming at that time i have to show that.
View 4 Replies View RelatedHow can the resource drawable xml can be changed at runtime for example. <resources> <drawable name="solid_red">#f00</drawable> <drawable name="solid_blue">#0000ff</drawable> <drawable name="solid_green">#f0f0</drawable> </resources> can be changed in runtime to <resources> <drawable name="solid_red">#ff00</drawable> <drawable name="solid_blue" >#0000fff</drawable> <drawable name="solid_green">#f0ff0</drawable> </resources>
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