Android : Create A Library For Different Classes?
Jul 17, 2010
I'm new to JNI, i'm developing a native library for an Android project. I read some papers about JNI programming but i didn't understand if it is possible to create a library that can be loaded in different project classes with different packages. I read that to declare a new JNI method the syntax is:
the prefix "Java_"
an encoded fully qualified class name
an underscore ("_") separator
an encoded method name
Based on this definition it shouldn't be possible...
Suppose i had defined a class A in the package pkg1 with the native method foo contained in libfoo, and then i defined a class B in the package pkg2. Can i use libfoo and the foo method in B? How should i define the native method to achieve the result?
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Aug 17, 2010
According to this SDK guide, unit-testing a Library project can be achieved by creating a standard application project, reference the Library project and then instrument the application for unit testing. However, when I do this and launch the test application I get the message.No tests found with test runner 'JUnit 3".I'm using Eclipse and the Android ADT plugin, all latest versions.the projects compile just fine. The test project also installs fine to the emulator. But in the console I can see that it looks for <library>.apk, which of course doesn't exist since I'm compiling this as a library into the test project.
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Mar 31, 2009
Dears Is there any Library and classes that enables writing a NetMonitor application for 3G & Wifi like in Symbian phones? Android.net.wifi and android.net seems haven't enogh functions to do that.Are Android Kernal developers willing to set such Network functionalities as Symbian & Windows Mobile have.
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Mar 3, 2010
I'm writing a game for Android. My GUI has the following basic screens (i.e. the information and interactions required on each of these would take up the whole display):
Main menu (let you start a new game, enter settings, see high scores, see about screen)
Game screen i.e. where the actual game is played.
Settings screen.
High scores screen.
About screen (i.e. credits and a back button)
Game over screen (arrived at when the game ends)
Pause screen (pauses game and can access settings)
The following are some example transitions the user might make between these screens:
1->2->7->2->6 (starts new game, pauses game, returns to game, finishes game)
1->5->1->4->1 (views about screen, goes back to main, views score screen, goes back to main)
I'm really confused about when to have just one activity that switches layouts and when to create new activity classes. For example, when my game loads, I have a "main" activity that loads the main menu layout. When you click the settings button, I launch a "settings" activity (which uses android's standard settings GUI). For the moment, when you start a game, I switch the layout of "main" to the game screen layout (which just contains one big surface view). I'm not really sure what the best way to integrate the game over screen, high score screen, about screen etc.
Creating a new activity for each seems really heavy weight to me. There's quite a lot of boiler plate code involved for each activity. Plus, communication between activities seems like a pain as you have to use bundles. Using just one activity means I can just share object fields directly. It seems that using layouts for the above would be more compact. Can anyone give me some recommendations?
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Oct 26, 2010
My Question is, why do we create inner classes or subclasses in android. Like the following example ...
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Jul 12, 2010
Is it possible to create another classes object in a class in android. code...
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Oct 28, 2009
I frequently run into the problem that I have to preserve state between several invocations of an activity (i.e. going through several onCreate()/onDelete() cycles). Unfortunately, Android's support for doing that is really poor. As an easy way to preserve state, I thought that since the class is only loaded once by the class loader, that it would be safe to store temporary data that's shared between several instances of an activity in a static Bundle field. However, occasionally, when instance A creates the static bundle and stores data in it, then gets destroyed, and instance B tries to read from it, the static field is suddenly NULL. Doesn't that mean that the class had been removed and reloaded by the classloader while the activity was going through a create/destroy cycle? How else could a static field suddenly become NULL when it was referencing an object before?
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Jun 30, 2010
I need to write a dynamic link library in C++ that is used by Java on Android. As I get, it should be .so library, but I don't know how to do that. I tried Cygwin, but it crashes: Code...
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Aug 12, 2009
I'm trying to create an app for Android that simply sends a command to an SSH server. No response needed, I just need to be able to send a command. I was wondering if there's any java library out there that I could use? No advanced stuff needed, just a pure connection to send the command.
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Jul 30, 2009
I have several apps (each in its own apk, process etc) running at the same time on user's device.
these apps are all linked to a single common jar file (internally devloped) which contains a large portion of their overall code size.
is there a way for me to force Android to make this common jar load only once (e.g. into shared memory)?
the reason we want to do it this way, btw, are to reduction of each of the single apps memory intake, on disk footprint and possibly of their startup time.
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Dec 1, 2009
Is it possible to create a custom library in android (having its own layout resources) for use across several android applications?
I created a regular *.jar file but when I tried to create/style my views dynamically most of the properties do not work. Even referencing simple styles from the android.jar file such as android.attr.listSeparatorTextViewStyle did not work.
I created an android project without any Activity, having its own resource files and then referenced this project from another Android project to use in its build path. Everything seems to work fine but the emulator keeps crashing (with no meaningful error message in the LogCat) when I try to run the project.
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Jul 19, 2010
I need to provide some SDK as third party library for other applications. We don't want to open our source code. How could make a jar file?
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Oct 23, 2010
I'm having a problem while accessing a web service through ksoap2 library, is there any other way to access the web service. I can't use ksoap2 library for my project. Should I create a soap library or any other way.
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Feb 4, 2010
I have a static library: libhello.a and I want to create a executable file that link with this static library:Code...
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Feb 19, 2010
I ask something about static library..
" how to create executable static library in android?"
and
"How to connect static library in eclipse?"
Static library is a binary file, How to understand static library in jni?
I wondering static library operation method in android.. (such as static library in vc++).
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Jan 21, 2009
I am trying to create object of FileTransferManager manager = new FileTransferManager(this.connection);
it is giving error, the same error gives for , OutgoingFileTransfer otransfer = manager.createOutgoingFileTransfer("nimit@pc3/Smack");
I am testing demo app for android, smack library and openfire server (FileTransfer settings are enabled in open fire).
What is solution for this.
But when I put
try{
FileTransferManager manager = new FileTransferManager (this.connection);
}catch(Exception e){}
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Sep 17, 2012
I am a student searching for a master who can teach me how to create or make a libs for audio. I wanna make a difference between the people to creating mods of audio.
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Aug 12, 2009
How i can create android project's library that can be used in any different project. I create a jar file that contains all activities and add this jar file into my eclipse project build path. But if i need to use any activity then i must need to register this jar activity into my project AndroidManifest.xml. This looks very odd. I need a solution in which i have a jar or any other deployable file that contains multiple activities and any user can use them in his project without registering these jar activities into NEW android application AndroidManifest.xml file.
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Jan 27, 2010
I can build a daemon with my algorithm code and main function.I put all files in one folder under /development and make This executable file works successfully
Now I want to separate my algorithm code and main function code. I hope to build a binary library with my algorithm code and main function will link this binary library to use.
Where to put my algorithm code to create binary library and how to link this binary library in main function code?
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Nov 3, 2010
I am a Delphi programmer and have written, over the years, hundreds of classes and routines which I can use in every Delphi program I write. This library is called d lib and can be *used in every Delphi program by putting this folder in my library path and using one of the units in the uses section of a Delphi unit. Being completely new to Java and Android development, I am wondering how to do this in s similar way. So my question, how can I write own classes, put them in some global folder, and use these classes and routines in every Android program I write ? I know this is a basic question, which I can probably find out by searching Google and trying it out in Eclipse, but if someone can put me on the right track, I know I will save much time.
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Nov 11, 2010
I have an Android library project that makes calls to PreferencesManager.getDefaultSharedPreferences.
I have 2 version of my app, paid/free, and they are not able to access the preferences stored by the library code.
Can someone tell me the right way to store values in SharedPreferences in library code and have the values available to projects that include the library?
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Aug 26, 2009
I created a jni library which depends the third shared library, I must copy the third shared library to /system/lib, otherwise, Java application can't load jni library. But you know, on G1 with official OS image, /system/lib is readonly. I tried to call System.setProperty to set java.library.path to the location stored the thired shared library before load jni library, but the issue still exists.
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Mar 11, 2010
I have an app, say My App Free. I want to create My App Pro which I can charge for that has some additional functionality. The obvious way is to have a library that contains almost all my app code, then two Android app projects for the Free and Pro versions which reference that library.
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Jul 15, 2010
As I understand, the three ways of distributing my application are via Jar, Android Library and Android Library Project.Jar - cannot contain resources or XML layouts (so this is out for me)Android Library - I don't really know how this works but the Google API uses it..Android Library Project - includes resources but allows the client free rein on the code as it is distributed as source.If I am to create a closed source application that requires drawables and XML files that I want to distribute to other Android programmers, what should I use? And can someone direct me to a tutorial on creating an Android Library?
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Apr 26, 2010
Android AMF client library Aftek has extensive experience in developing enterprise Flex applications. We have used BlazeDS extensively and we believe that it would nice to provide all the benefits provided by AMF for Android applications as well. We have developed an Android AMF client library which would enable Android application developers use the same extensively. The Android AMF client library supports remoting and secured remoting. This will allow all android applications to use the existing backend like .NET, Java, or PHP. The implementation is asynchronous in nature providing success and failure callbacks. This allows application to perform other tasks without blocking the application. We are currently performing some performance benchmarking and plan to release our library very soon. We would also be incorporating the messaging feature as well.
Android RTMP client library:Aftek has extensive experience in developing voip and audio/video and media applications. Media applications has a huge market and there would be quite a few people eager to develop the medial applications on Android. We believe that it would nice to provide all the benefits provided by RTMP for Android applications as well. We are developing an Android RTMP client library which would enable Android application developers use the same extensively. Our Android RTMP client library would support some add-ons that would help developers to deliver robust media solutions.
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Oct 29, 2010
I want to use the accessibility classes, but I'm a begginer in android programming and i can't understando how to use them. I don't find any example using these classes. Somebody can give me some use examples? Another thing Can I set enable the Accessility mode in the emulator?
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May 18, 2009
I am writing a app, which has sort of plugin framework. public abstract class AbstractService {public abstract AbstractService getInstance(String name)..
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May 29, 2009
I have an apk installed in /data/app. I want to use the class methods in there. Here is what I tried. code...
I got "ClassNotFoundException". By peeking into the apk, I don't see class files but classes.dex. I would assume SystemProperties class is in classes.dex. Why can I load it?
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Apr 7, 2009
I am developing sample Video Recorder for Android.Following is My code snippet.
CODE:............
But when i am trying to run in eclipse,am getting following errors. MediaRecorder.VideoSource can't be resolved. MediaRecorder.VideoEncoder can't be resolved.
I am using android-sdk-windows-1.1_r1 as my android SDK,and didn update this from 1.0 instead i installed it freshly.
I guess there might be some problem with the SDK.
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Mar 19, 2010
I am looking for the implementation of the IAlarmManager.I am interested in the scheduling done by the AlarmManager.setInexactRepeating method and so I started looking for the implementation but I haven't been able to find anything.Internally to AlarmManager, I can see that the actual work is being done by an android.app.IAlarmManager interface.After googling around for a bit there seems to reference to an implementing class called android.app.IAlarmManager.Stub but that is as far I get.I am working with Android 1.6.
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