With the NDK I can wrap a native library so I can call the methods from Java and package that library into my application.
Say I want to package a custom version of SQLite, is there any way to override the system library for SQLite, so I dont have to reimplement the SQLiteDatabase class?
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I have written some apps, but have a general question. If I were to write an improved version of - let's say - TextView. Is it possible to make all app's on the system using this class, basically replace TextView? How are the java classes on the Android system, are they compiled, can I replace the library? Is this protected?
View 8 Replies View RelatedI am an Android app developer, and I have purchased a Nexus One device which I use to continuously test my developed Android applications.
Background: ----------------- One of the applications I developed uses a native shared library (e.g. myNativeLib.so). Only my application loads & uses this native library. I had developed this app before Android NDK came out. I pack my native library into my apk's 'assets' folder, and during my application start- up, I extract this native library from my package's assets folder to my app private directory (i.e. <assets> -> /data/data/<myappprocess>/ myNativeLib.so). Then I use System.load() API in my application to dynamically load this native library.
Problem: ------------ This application was developed during Android 1.5 (i.e. cupcake) days {I didn't have the Nexus One then}. The above procedure has been working without any problems right from Android 1.5 to Android 2.2 (i.e. Froyo). I have also tested the same on my Nexus One for Android 2.1 (i.e. Eclair) and Android 2.2.
The problem began the moment I recently upgraded my Nexus One to Android 2.2.1 via the FRG83 system update. Now, whenever I try to load my native library, I get the following error:
D/dalvikvm( 3653): Trying to load lib /data/data/<myappprocess>/ <mynativelib>.so <some address> I/dalvikvm( 3653): Unable to dlopen(/data/data/<myappprocess>/ <mynativelib>.so): Cannot load library: link_image[1995]: failed to link <mynativelib>.so
What I have Tried: -------------------------- 1. I tried my application using Android 2.2 SDK (emulator)...it works, no issues. 2. I checked out the latest froyo & android2.2.1 source code from Android open-source, built & tested my application + native lib using the latest froyo source...it built & ran, no issues. This should've taken care of any changes in the native code dependencies between Android 2.2 & Android 2.2.1 3. I even checked Android 2.2.1 source code for dalvik (java System & Runtime classes) + bionic (linker & dlopen sources) between Android 2.2 & Android 2.2.1 (using source checked out from Android open-source), but couldn't find anything consequential 4. I am unable to return my Nexus One to Android 2.2.
i was trying to change the background for my x'pop 5035D cause i'm in jelly bean 4.1.1 and all the backgrounds for the system is white and it's very bad for my eyes specially at night ,
i was trying to modify framework-res.apk that exist in :system / framework but i couldn't so i thought i can replace it and i downloaded another frame work- res.apk and i used root explorer to replace it after taking a copy of the original file and since i did that the device restarted and stuck at the logo and i can't boot.
i tried every thing , i did nandroid restore and even wipe data / factory reset and the same result it just stops at the logo every time .
Has anyone found a replacement app for NFL live.with my team being the colts and me living in jersey I don't get a lot of games and Im often out the house I miss listening to the games
View 2 Replies View RelatedI have a TomTom GPS that has a very out of date map. It will cost me $70 to update it, and for that amount of money, I might has well pony up the $30 more and get a brand new unit. But, after looking into the new Google Maps Navigation feature, I'm not sure I will need a stand alone GPS unit, once I take delivery of my D-X.What, if any, features would I lose by using my D-X as my primary nav device vs. a dedicated GPS like a TomTom or Garmin Nuvi? Has anyone else made this transition?
View 12 Replies View RelatedI want to have my own Launcher Application for Android in other words , I want my own Application to run directly after booting , instead of the Launcher app as I am not running Android on a Mobile phone , and I don't want Android's Home GUI also I want to change the app in the source code , before compilation.I have tried to Simply replace files under "/packages/apps/Launcher" with my HelloWorld App then running this command "mmm packages/apps/Launcher" but It didn't work.
View 2 Replies View RelatedI was really excited today when I saw the Tools r7 and ADT 0.9.8 were available and the latter had this note;
Fixes problems with handling of library project names that contain characters that are incompatible with the Eclipse path variable. Now properly sets up the link between the main project and the library project.
I create the library (foolib - no spaces, no caps, no punctuation). So far so good. I go to the main project, go to preferences --> Android. In the library box I add the new library. It appears. I press Apply. I press OK.
Nothing happens.
I return to the preferences, the library is no longer there JUST LIKE BEFORE.
I looked around for info on this in the group but couldn't find any... so far in my OpenGL programming I've just done everything directly, but I was curious if anyone had written any "wrapper" libraries for it besides min3d. Min3d is great (or is getting there) but it's GPL'd, making it unsuitable for a commercial product (if my understanding of the license is correct).
View 5 Replies View RelatedWe have been using gdbserver to debug our JNI code as follows. We have been less than successful -- breakpoints do not always get activated, sometimes we get SIGILL, and we seldom ever get a useful stack when the debugging stops on SIGSEGV, sometimes the program dies with SIGTRAP!!!
We have occasionally been able to have debug sessions with s/n, but since pretty much every SEGV has resulted in either a damaged stack, or at least, gdbserver can not find the stack, it's a pain.
Is there something we are missing? Is there some reason to use the 4.2.1 vs 4.3.1 toolchain? (Why are there two toolchains? I assume because of bugs in each that are fixed in the other... which bugs?)
We guessed that the "dalvik" process that we wanted to debug was app_process --- we found this out by looking at /proc/XXX/cmdline on our running activity.
This is what we do typically do(repo sync directory is in /build/m1 for me)
invoke:/build/m1/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin/arm-eabi- gdb
(some of us use -tui, some of us run it under Xemacs, etc.)
We then do:
CODE:..........
We then start our activity, adb shell, discover the PID of the activity, discover the IP of the phone with "netcfg", and:
app_15 1815 49 107468 15744 ffffffff afe0d4a4 S org.credil.thomas_watson.videophoneservice
# gdbserver 0.0.0.0:1234 --attach 1815 Attached; pid = 1815 Listening on port 1234 Remote debugging from host 132.213.238.4
(gdb) target remote 132.213.236.179:1234
This is with a physical device. With an emulator, one has to, of course, run the adb forward stuff. (Too bad that doesn't work with a real device too, as then I would not need to run gdb over the wireless)
Program terminated with signal SIGKILL, Killed. The program no longer exists. (gdb) target remote 132.213.236.179:1234 Remote debugging using 132.213.236.179:1234 Error while mapping shared library sections: /system/bin/linker: No such file or directory. warning: .dynamic section for "/build/m2/out/target/product/generic/ symbols/system/lib/libc.so" is not at the expected address (wrong library or version mismatch?) ... many more GDB will be unable to debug shared library initializers and track explicitly loaded dynamic code. tkill () at bionic/libc/arch-arm/bionic/tkill.S:52
(gdb) break sendframe Breakpoint 1 at 0x80401086: file /build/m1/packages/apps/ VideoPhoneService/libvideophoneservice/src/rooster.cpp, line 96.
(gdb) c Continuing.
Program terminated with signal SIGTRAP, Trace/breakpoint trap. The program no longer exists. (gdb)
(btw, an annoyance about googlegroups is that it seems that it looks at my SMTP from header, rather than From:... This basically means that I can not post from gmane.org via NNTP, which is a shame. Is there a secret NNTP access on googlegroups.com, I wonder?)
I need to know the footPrint of Android and its various Libraries
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Is it possible to use a native C/C++ library? If so, are there any restrictions for those libraries to be used?
View 3 Replies View RelatedI'm currently making a purely math and algorithm-based C++ library. Will I be able to use it when developing for Android? How? I guess writing some Java wrappers, but will it then be usable on all JVMs?
View 3 Replies View RelatedIs there any way to replace the default volume toast (which is displayed when the volume up or down keys are pressed) with a custom- built toast? Couldn't find any method of doing this.
View 2 Replies View RelatedI have a Droid and accordingly, have all of the stock Google Apps which come with Vanilla android. I work in the IT department at a University, though, and we're trying to decide on policy regarding the syncing of mobile phones and the level of support which we offer to customers. Android phones have been a burden because of manufacturer customization. We've had many issues with Galaxy users, motoblur users, and especially Sense users, specifically related to syncing properly with exchange servers.I've only just realized that the manufacturer customizations are not just skins, they replaced entire apps, such as the email app, with what seems to be inferior apps. Vanilla Android, with the stock email app seems to have no trouble syncing to the exchange server. On the other hand, the Sense app, for example, will not. Instead of recommending fixes for each manufacturer, we are recommending the use of Touchdown (which is 20 dollars and it bothers me to have to recommend one of the most expensive apps in the market).I know that the stock app has no issues with Exchange sync of calendars, contacts, and email. Is there any way, on a non-rooted HTC phone for example, to replace the sense app with the stock app?Worst of all is the fact that instead of finding a resolution to the issue, the school is recommending the iPhone, stating that it is "more compatible" with the school's server. I know this isn't true and hate sending business in Apple's direction, so I'd really like to help find a resolution to this.
View 1 Replies View RelatedIf I publish an update to my app on the Android Market, will the app only "patch" (or only update changes to current application) or will it just replace the old application with the updated one?The reason is because for my app I need the user to retain some information (such as a database) on their phone that is gathered from the user on the app's first setup and not have to ask the user to repopulate this data on every update.
View 3 Replies View RelatedHello everyone. I recently got the MyTouch 3G so I'm a new Android user and I'm very happy to be one. Anywho, I was wondering about the Handcent application. My friend suggested it to me and I like its setup over the default Messaging app, so I wanted to delete it. But would deleting the default Messaging app also delete all the texts in general? Or would they carry over to the Handcent app and stay there even after deleting the Messaging app. I don't want to lose some of the texts that I already had.
View 2 Replies View RelatedI need to add few shared libraries to the andriod as part my application installation. Can you please suggest right information resources regarding the same.
View 2 Replies View RelatedIs it possible to use third-party libraries for display pdf?I mean to use custom pdf view, in which I can pass pdf url and view it in new Activity.I want include libs into project and use their as resources.
View 9 Replies View RelatedI have to add java libraries javax.xml to the my android project, while I am trying to add them it shows the error "Conversion to Dalvik format failed with error ".
View 7 Replies View RelatedI'm building an app where I want to architect the app layer separately from the service layer (not android services). So I'll create a service interface(the apis) and then create a class(es) that implement that service interface. Inside the android application layer, I want to code to just that service interface. I think this is similar to how the google maps apis works. the api interface and stubs are in the framework, then each device actually provides the implementation. I don't need to go that far, but I am wondering how I package this up. One, where would I put these interfaces, so I can code to them in the app layer (like Activities). Second, how do I tell Android where the implementing classes are? I'm guessing this is somewhere in the manifest? For now I think I would probably just build the service implementation with the application source code, if that's easier. Eventually I'd like to break that out and drop it in as a 3rd-party jar.
View 4 Replies View RelatedI'm working on a project with a group that is using Eclipse, but I'm using Netbeans. Up until today this wasn't an issue. When updating from the repo they have added some source code as a library under a directory called /lib-src. When I try to compile the code I get an error that it can't find certain packages... these are the packages under /lib-src.
Using NetBeans I can add the library as a folder so now the references to those packages are happy. However, I'm getting this new error when compiling:
UNEXPECTED TOP-LEVEL ERROR:
CODE:.........
I can include the build-impl.xml file if you need it, but I don't think that is main issue.
I am completely new to the NDK.
I have done a couple of the tutorials including the hello from jni one and another one that calculates the sum of two numbers.
They involved using cygwin and the ndk to create the library so file and I have a bit of a grasp on how to insert my own libraries into the libraries layer of Android.
I have now been asked to access the native libraries on Android and see what I can use them for.
My question is can I do this?
The STABLE-APIS.txt document is a bit vague and mentions the following as Stable C++ API's in Android 1.5
cstddef
new
utility
stl_pair.h
Does that mean I can access them?
If so then how do I go about it?
I need to import a couple of jars that where compiled under the full implementation of java. I know that Android doesn't use all the packages that java has to offer. My question is: Is it possible to import them without creating errors? Is there a tool that can convert jars to android jars? if so, can some examples be provided.
View 1 Replies View RelatedIs it possible to write data or create folder in system directory like /system/media/audio/alarms. i.e other than our respective package.
View 2 Replies View RelatedIs it possible to install a java library in a folder and have this code dynamically linked into another program? In other words, i have a major code base that would be shared among different projects.Assume that all them are created with the same shared user id.
View 4 Replies View RelatedIs there a way we can parse apple plist xml using any libraries or otherwise.
View 4 Replies View RelatedI'm attempting to port a normal Java program over to Android, however I am having a problem with a huge number of missing Java packages (e.g., Android Java does not have java.lang.management). Is there a way for me to work around this, such as by adding the Java modules that I need?
View 2 Replies View RelatedI am into healthcare imaging. Wanted to know if there are any DICOM Libraries for Andriod.
View 2 Replies View RelatedI have a few already written C libraries which i want to embed into the library layer of the android architecture at the same level as the already existing libraries such as libc etc.... i dont want to insert it as .jar packages at the application or framework layer. is that possible.
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