Android :: Native Android Application Java Front End

Jun 25, 2010

I am trying to produce a java front end, via some sort of Android "view" that will allow me to show the console output from a native C/C++ application binary. I followed the steps from various google searches and I have a tool chain that produces native binarys that I can then "adb push" onto the android device. I can either use the adb shell or a console application like ConnectBot to native to the pushed path and run the binary like so: ./someApplicationHowever as I stated in my opening sentence I would like to wrap this binary with a font end producing an apk that can be loaded onto the phone and when it runs it opens up and directs the stdio output from the native binary to the screen.

Android :: Native Android Application Java Front End


Android :: Start Native Application From Java

Apr 23, 2009

I have a native application that I would like to start from a Java interface. Does anyone know of a good way of doing this? can start the application using adb, with no problems. I can also start the application using Runtime.exec(), but that doesn't work so well for me; I need the application to run outside of a Java Runtime Process. Any ideas?

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Android :: Java Application / Native Library Integration

Apr 8, 2009

I have developed bluetooth application where native library will be initiated by Java application (using JNI wrapper). JNI will call the entry function of the native library and then it will create Pthread to for scanning the device. Once Scanning is over, i will get the callback which i registered during the entry function of the native lib (called by app). But i haven't received the callback, but if i run the same native library in the shell (executable from the shell terminal) it is working fine. Can any one help me, if there is any specific architecture needs to follow while developing Java application based on native lib?

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Android :: Running Native Executable From Java Application

Nov 5, 2009

I am trying to run a native executable from inside an android java application. The native executable exists in my assets. At start of activity, I copy it from assets to my application cache Dir. then I use Process Builder to run it.I tried to run "chmod 777" on the file and on cache directory containing it and I ensured permissions are granted using adb shell. but I still get this permission exception.

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Android :: Can A Native Application Use Java Methods In Telephony Manager?

Sep 17, 2009

I am currently working on porting a application written in C in android platform. I need to know that can i invoke/call the getSystemService from the C application using invocation interface by JNI. Meaning using a .java file which will interact with the interace provided by the android.telephony.TelephonyManager.java for using getCallState() and other mehthods.

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Android :: Java Vs Native Thread?

May 8, 2010

Does anyone know how Java thread relates to Android native thread? Does it map one to one?

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Android :: Debugging Integrated Java And Native Code

Feb 7, 2009

I am trying to figure out what is the best way to debug a mix of Java and native code? Please notice, that I am NOT trying to develop a native app. The app will be written entirely in Java, using Android SDK. However, I noticed that some pieces of the SDK use native methods (e.g. AssetManager, WebKit, etc). I wonder which tools Google developers use if/when they need to debug a mix of Java and C/C++ code? Eclipse/gdb or there are commercial tools which make the debugging experience less painful?

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Android :: Set And Get Thread Priority From Java And Native Layers?

May 10, 2010

I have a multithreaded streaming app which has mainly the following 5 threads. 1 Main App(UI) Thread 1 controller thread (in native) 1 audio decoder thread (in native) 1 video decoder thread(in native) 1 thread to query the head position of audio (in Java) Apart from this I have video rendering with OpenGL. My problem is, if I query the thread priority using the Thread.getPriority method (my native threads make callbacks to Java and I am making the query at that point of time), I am getting the priority of each of them as 5. For my audio query thread (the last one in the list) I am explicitly setting the priority using Process.setThreadPriority(Process.THREAD_PRIORITY_URGENT_AUDIO); Also for my decoder threads, I am giving higher priority than my controller thread(using pthread APIs in native). But still finally all of them seem to have same priority. Also what should I be doing to increase the priority of my threads(both from Java and native)?

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Android : Access To Native Screen Buffer From Java

Jul 29, 2010

Is it possible, from within my android java app, to capture an image of what is on the screen, even if it was written using native (ndk)? I do not wish to take screen shots of other apps, just my own. I can already capture and image of a canvas that I am aware of, but is there a view or canvas or something like it that always represents what is on the screen, so that a) I don't have to capture the separate views images and recompile them, and b) I can see what my native (jni) code is doing with the graphics too?

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Android :: Application Focus To Front Under Special Circumstances?

Nov 1, 2010

I have a need to force my application to the front under special circumstances. I know its against the good coding philosophy but I am working on a turnkey solution where I control the complete device. The app is used internally as a business tool and supplied to the users on a stripped down device. I have searched but cannot see a way but know that it can be done as in the Application Protection app. This can react to the launching of an application and kill it / allow it by entering a password.

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Android :: Make Application Show In Front Of Standby Screen?

Aug 30, 2010

I am trying to make an application which will triggered by SMS, and show in front of the standby screen. My application will only use a small portion of the full screen, and the background is the android standby screen. I have searched some android examples but those application will always fill full of the screen, can anyone give me some guideline on how to make an such application?

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Android :: NDK OpenGL - Mixing Java And Native - C - Calls To OpenGL API

Jul 24, 2010

I would like to be able to use the OpenGL API from both Java and C (via NDK).

In Java, there is a GL object passed, which has all GL methods on it.

In C, you just talk to the native library.

In a single onDrawFrame callback (for which Java is passed a GL), can I use methods on the GL object, and also call NDK methods which access the openGL library?

In other words, is the GL object just a wrapper for the same instance of the native library?

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Android :: Prevent Native Application

Aug 4, 2009

I want to prevent native application to receive message.I want that my application only receive message. Is it possible ? if yes then how ? can i access the received message and delete it ?

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Android :: How To Make Native Zip Application

Oct 7, 2010

Hello, I would like to create a zip file from files located on the sd card, I have managed to do that using java but I think that the result is too slow, so I thought of going native using the android NDK.

My questions are:

Does anyone know any C/C++ library to zip unzip files that will work on android?

How to know if the library will work on android?

will this make any difference on performance?

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Android :: Notification For The Message Sent By Native Application

Sep 7, 2009

How can i get notification when user send message from mobile?

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Android :: Get Event On Launching The Native Application

Aug 6, 2010

1 . can we get any event when user tap/touch native application(i.e. messaging,contacts).

2 . i know that any application launch by intent in android, there is any way to know which application launch with launch of application.

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Android :: Can Native Only Code Run As Standalone Application

Nov 8, 2010

We want to migrate a huge complex native program to Android system ,running it as a background service accepting command sent from Java Program using JNI along with IPC. However, the Android NDK state following words:

Please note that the NDK does not enable you to develop native-only applications. Android's primary runtime remains the Dalvik virtual machine.

Does that mean we have no way to run an standalone native-only application on Android as a background service? The native code can only exist in the form of library that will be loaded to the virtual machine through JNI?

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Android :: Enterprise Native Mobile Application Development

Apr 22, 2010

I tend to believe that developing mobile applications in an enterprise environment is best suited by developing intranet web applications. That said I have been asked to think about whether there are specific enterprise applications that could only be accomplished or would be more successful as native applications. I am curious as to what the Stack Overflow community thinks.

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Android :: Loading A Maps API Site In A Native Application

Feb 27, 2010

I'm trying to follow the example from google: http://code.google.com/apis/maps/articles/android_v3.html

Using the example files from their SVN repo: (http)gmaps-samples.googlecode.com/svn/trunk/articles-android-webmap/

But although it seems to compile and export it fails; can someone sanity check that its not just me this fails for and any hints as to if its a quick thing to fix, I've been prodding it with try/catch for the last 2 hours to no avail.

Forgot to add
It Compiles and Uploads to the emulator (and to my phone) but running it just results in

The Application WebMapActivity (process com.google.android.examples.webmap) has stopped unexpectedly. Please try again. [Force Close]

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Android :: What Can Be Achieved In Native Mobile Application That Can't Be Done In A HTML5 Web App

Nov 24, 2010

I've talked to a lot of people recently who say they are expecting to stop writing native mobile apps and start writing web apps once HTML5 gets more fully baked in mobile OSs. I just finished my first HTML5 deep dive, and I'm not yet convinced.

Will HTML5 work as a replacement development platform for native apps, or are there certain things that require targeting the native runtime?

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Alternative Menus In Android Native Email Application?

Feb 25, 2010

wanted to add a menu option in native email app in android . I have used intent filters but i am not successful in achieving it. Actuaaly i want to a menu option to the native mail application in Android.. so that my activity / app can be launced on clicking that option. This feature has been successfully achieved in Blackberry and even in android for gallery application. On android i have achieved it by using intent filters.

<activity android:name=".DisplayAlternativeMenu"
android:theme="@android:style/Theme.NoTitleBar">
<intent-filter android:label="My Activity">[code]....

This basically display an menu item"My Activity" when u press share in Gallery. and clicking on that launches my activity .But unfortunately it didn't work for Email Application. Looks like the pair of action & mimetype i am specifying is not correct. which action & which mimetype should be used. Also if there are any permission required,what are they?

My aim is to add an alternative menu while pressing menu in Compose Email(When a mail is composed) of the native email application

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Android :: File Change Notification Permission For Native C Application

Aug 4, 2009

I am migrating a c program from linux to android when lauch it in the shell everything is ok, but when I lauch it from UI with Runtime.getRuntime().exec(...), there is permission issue for the file change notification, also I know there is mechanism of permission on android, but I can not find related type of permission in Manifest.permission list.

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Android :: Return To Application When Back Key Is Pressed From Native Dialer?

Nov 4, 2010

This is what I'm trying to support. Can this be done?

a) User is an Activity A in my app. b) The user is taken to the native dialer when he chooses a particular action in my Activity c) User presses the back key d) Taken to homescreen

Is there a way I can change it, so the back key press returns him to my app, instead of native homescreen?

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Android :: Video Render Application Using Native SurfaceFlinger APIs

Jul 2, 2010

I am facing in Android display system(Video Rendering using Surface Flinger Native APIs).

As for my understanding, Android display system relies on Surfaceflinger library( a system wide screen composer). Surfaceflinger runs as a service along with Mediaserver service, Camera service, Audioflinger and these services interact with each other through Binder APIs at native level. If any user application wants to access SurfaceFlinger native APIs, it requires Surfaceflinger Access permissions.

My requirement is that I want to create a SurfaceView at the JAVA level (Android Application level) and render video data to that Surface, means, pass video data to the Surface flinger library by invoking native Surface Flinger APIs. But, because of Permission Problems, I am not able to invoke Native Surface Flinger APIs from Application Layer.

Is there any ways to invoke Surface Flinger Native APIs from Application Level ?

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Android :: How Native Gallery (Camera Application) Reads Bigger Images

Oct 10, 2009

I am a android developer, I stuck into a problem, how to read really big images with Android API, I am wondering how native Gallery (Camera application) is reading bigger images so fast. can any Android Engineer here direct me to the piece of code that android engineer used to draw bigger images.

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Android : Get The Font Face Size And Formatting Of A Native Element In Application

Mar 8, 2010

I would like to reuse the exact same font-face etc... like Android uses in the PreferenceScreen

Here is a screenshot I am looking to reuse the title, and the summary style from these views.

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General :: Unable To See Front Cam Tap Icon In Camera Application?

Nov 12, 2013

I am unable to see my front cam tap icon in my camera application?

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Android :: Add Uses Permission To Application Via Java Code

Jul 30, 2010

I want to add <uses-permission> via programatically .I want to telephone number of the device.For that i need to access the phone state.But i need to add that permission only with Java code at runtime. Is it Possible to do so. (or) Can you suggest any alternative way to read the telephone number .?

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Android :: Java Application For EPUB Library

Sep 5, 2010

Is there any ready library to read ePub format? I found ePublib in
http://github.com/psiegman/epublib. I'm still learning how to use it. I wonder if there is ePub jar which ready to use for read ePub format in android.

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Motorola :: Can Java Application Runs On Android

Dec 8, 2009

I m a programming noob here..i need help on some issues here. I understand that Android is built from Java. I need to know if i can run a java application on android? Or can i run the application with minor change to the current coding? I read about Java ME can run on android but what abt .Jar file?

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