General :: How To Get Instance Of Class That Implements Interface Using Reflection

May 7, 2014

I've been going over the android sdk for the past year to find out if there is a way to change the network type(2g/3g/4g), in phones with root access.However I couldn't find any way to do this.Asking around,someone told me that I could do this using reflection,by calling a method on a phone instance.Looking through the source code,I did find a setPrefferedNetworkType(); method in the Phone Interface,inside the internal telephony package.Is there anyway I can use this to solve my problem.I can't seem to find a way to get an instance of a class that implements the interface.Or is there any other way to do it entirely?

General :: How to get instance of class that implements interface Using reflection

Android :: Java Reflection - Get All Instance Variable Names Of A Class

Nov 5, 2010

I'm writing an android app that requires binding a JSON object into a domain entity with the keys from the JSON as instance variables. Since there are several domain entities, each with different instance variables that the JSON needs to bind to in the app, i'd like to write a method such as ths following: Loop through all the instance variables from the domain if a key exists in the JSON with the name of the instance variable, take the value for this key from the JSON and set the Domain's instance variable with this key name equal to this value. The reason i'm interested in the doing the binding from the class to the JSON is because if the JSON changes for some reason, I don't want it to break the app when the instance variable doesn't exist in the app's domain for a specific JSON key. Code...

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Android :: Reflection Fails On Large Class / What To Do?

Jun 15, 2009

Does dalvik have any limitation it puts on classfiles, mainly size related? In groovy we have a huge class thats need to be able to be reflected upon, but it silently fails. IE theres no error during build(dex) or load time but calls to the reflective methods throws a no such method exception. This file is above 13000 lines of code and contains a vast number of methods so size limitations seems probable, or are there any other ways reflection can fail for a normal java class? Oh, and cutting the file down in size made it work but is not optimal since it contains all of groovy's utility methods.

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Android : OpenGL App - Created Rendering Class Which Implements GLSurfaceView.Renderer

Jul 16, 2009

I've created a simple OpenGL app and created a rendering class which implements GLSurfaceView.Renderer. All it does is draw 100 triangles (NUM_OBJECTS = 100) on the screen and move them about, bouncing off the edges. The projection is glOrtho2D and there is no z-buffer. I'm running this on a G1 with continuous redraw enabled.

Here is the onDrawFrame method:


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Android :: Java Reflection To Call Higher API Level Function / Abstract Class

Jul 6, 2010

My point is to be able to call a 2.1 API if it exists, while the application should be able to run in 1.5
Specifically, I am making a GPS application which would like to call android.location.LocationManager.addNmeaListener if available. My problem is that this call takes as parameter an abstract class (GpsStatus.NmeaListener) which I cannot pass directly to Class.GetMethod (or my application won't work in 1.5). What I am currently trying is a) to create a wrapper class for GpsStatus.NmeaListener:......................

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Motorola :: Initialize A Class Instance?

Sep 27, 2010

I'm trying to initialize an instance of class console Droid with console Droid console = new console Droid();, but it throws a class, interface, or enum expected compile error. What's the right way to initialize the class?

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Android :: How To Set Abstract Class Object As An Instance Of Another One?

Jul 8, 2010

I have Class in having an abstract class object as a field in JAVA layer. I want to set this field From Native code C++. I am Trying to use SetObjectField() to set, but it does not work out. Does anyone try this before or know who to do it please shed some light on it.

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Motorola :: Class Instance Sizes In Android

Aug 9, 2010

I'm currently implementing some image processing code for Android. I'm aware of the memory limits and am happy to code within them. However, I cannot find any documentation that lets me work out how many bytes are used for each instance of a given class that I might want to instantiate (on the heap). I'm an experienced C++ programmer and so am relatively competent at working out such struct/class sizing issues for my C++ code (taking into account processor data path width, platform alignment issues etc). I know that Java in general is at a higher level of abstraction and so that I may not be able to guarantee particular memory usage for a general Java VM. However given that android is running on a different VM, and given that developers are strongly memory constrained: I'm assuming that there may be a relatively deterministic set of rules for working out how big a given object instance will be, given knowledge of the members.

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Android :: How To Save An Instance Of A Custom Class In On SaveInstance State?

Jul 3, 2010

I created an instance of a custom class RestaurantList to hold my data (a list of restaurant data received from a web service as json data).How can I save it in onSaveInstanceState? Code...

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General :: ROM For Android That Implements Windows 7?

Mar 30, 2012

Is there a rom for Android that implements windows 7?

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General :: Bluetooth Stack AIDL Reflection Methods?

Feb 17, 2013

I work at a small company that fields autonomous android devices which programmatically connect to bluetooth telemetry devices. These devices require pins, so we need to automatically create a pairing in order to connect to the bluetooth devices. We DO have root access.

Since the new Bluetooth Stack in Android 4.2, I have been unable to use this common AIDL bluetooth reflection method in our private utility app:

public IBluetooth getIBluetooth() {
IBluetooth ibt = null;
try {
Class c2 = Class.forName("android.os.ServiceManager");
Method m2 = c2.getDeclaredMethod("getService",String.class);
IBinder b = (IBinder) m2.invoke(null, "bluetooth");


The issue about this strategy no longer working is documented here. I previously used the setPin method as well as the createBond method from this Interface, and now I cannot.

Is there anyway to manually create a bluetooth pair profile under Android 4.2? Is there a database file where the profiles are stored that we can use root and sqlite3 to access?

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Android :: Supporting 1.5 Features From 2.1 And No Reflection?

Jul 30, 2010

I currently have an app on the market that supports Android 1.5 (SDK level 3) and up. It also takes advantage of several features that are only present in Android 2.0 (SDK level 5) and up. I do this using Reflection.

I read a post on the Android Developer Blog that talks about how to support these new features while using no Reflection, which would be amazing. <uses-sdk android:minSdkVersion="3" android:targetSdkVersion="5" />

I have tested this out and while it works there is one huge downfall. Currently if I try to add a SDK level 5 class, but I don't know that it's a SDK level 5 class, there is no worries. Eclipse isnt going to find the class and I'm not going to be able to add it.

Using Google's recommended method does allow me to add the classes and gives me no notification that this code is targeted just to SDK level 5 users. This opens up too big of a possibility of adding in code that would break some users without knowing.

Does anyone know of any plugins, options, etc that would warn me at the places I have targeted SDK level 5 to keep this from happening?

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Android :: Reflection For A Field Going Wrong

Jun 1, 2010

I have been trying to use reflection for a specifiec Field in the class, the MANUFACTURER field...

I have tried by using this code :.............

I am gettign the following errors :


And when debugging I noticed that InvocationtargetException is continuesly thrown, so I am guessing I haven't been implementing the whole Reflection principle correctly...

Any idea where things are going wrong or otherwise on how to implement Refelction for a single Field correctly ?

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Android :: Implements CommandInterface Twice / Why Is So?

Dec 17, 2009

Maybe this group is not the right one to ask this question.

I am studying RIL and noticed inplements CommandInterface twice( extend BaseCommand implement CommandInterface). What is it for? Any design pattern here?

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Android :: Need Source / Links To Implements A Design?

Jul 21, 2010

Referring Can any body provide source/links which implements such a design?

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Android :: NSData Means What - Implements Its Characteristics In Java?

Mar 13, 2010

NSData means what? how to implements its characteristics in Java?

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General :: Using New Drawer Interface Element?

Jun 11, 2013

In apps like Gmail and Franco's kernel updater, there is a new interface element that brings out a drawer on the left side on Phone DPI that on Tablet DPI is a split screen.

Is this something that has to be programmed into the app, or something that can be edited into older apps? Mainly I would like that interface in the stock Email application.

Nexus 4 using xda premium

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General :: Galaxy S3 - Make New Instance Of Storage?

Feb 22, 2014

As of now, my Internal Storage on my S3 follows a path similar to this in order to get to the files I had before just flashing a new ROM:

Galaxy S3 > Internal Storage > 0 > 0 > [Folder with my stuff]

Is it possible to NOT create a new "0" folder every time I clean-flash a ROM? This results in having multiple instances of where Screenshots, Pictures, ROM Backups, and other files/backups I deem important are saved.

Having to transfer files manually is a huge time sink (literally hours), and I seriously cannot stand when my files are so cluttered and folders are redundant and more deep and than necessary.

The only thing that I can think of in order to make the process less painful is to compress the old instance of the folder, move it up one level, and then uncompress the files - leaving one "0" again -

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General :: IPod Vehicle Interface For Android

Oct 25, 2011

My wife's vehicle has a USB port into which she can plug the USB cable for her iPhone and play here music through the car stereo. Is there a cable that will allow for this on my Android device. Specifically, I have the Bionic. I didn't think it would play media through the USB port, and I didn't think there is an HDMI to USB cable, but I wanted to check.

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General :: Can Android USB Interface Act As Boot Device?

Aug 22, 2010

Very often I find myself needing to reset or get around someone's Windows Password, the easiest way of course is with one of many available linux boot cd's that'll edit the windows system hive. However most of the time I'm not carrying this around, I have a USB stick that can be used but I noticed earlier that while my Nexus One was plugged into the USB port on boot it is detected by my bios.

So the question is - Can the android USB interface act as a boot device? If so I assume it'd need a different partition since it's already got an OS?

(Also while I have your attention: 1) Did they ever fix the +1 area code problems with contacts?, 2) Why don't half my contacts show up in Send MMS dialogue (and others)?, 3) How do I tell if I have an SLCD or AMOLED screen cos sometimes the screen looks really crappy (dithering or off colour banding) AND FINALLY 4) can you set notification sounds differently depending on time of day (ie; I don't want a new gmail alert to wake me up at 2am.

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General :: How To Change User Interface Of Phone

Jun 22, 2013

I Have a Galaxy note, and I wanna change the User Interface of my phone. How do I do that? I mean the way everything looks( musics, buttons, settings, everything.) I dont if I am doing the right thing, but I downloaded some PSD files of interfaces I really liked, but I dont know what to do next.

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General :: Removing Android Bootloader Interface?

Jan 20, 2013

I recently installed Android bootloader interface to make possible rooting of my phone. However, can I reverse somehow the process and remove the android logo and bootloader interface?

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General :: User Interface For Android Apps

Jun 7, 2014

Is there a place where I could find open source examples of User Interfaces for android apps. Like a project containing custom buttons, isons, sound effect, a nice layout with multiple blank activities that serves as a skin for your app. Strangely I didn't find anything like this whereas there are plenty of themes.

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General :: Install DBA Interface With Hisense Sero 7 Pro

Jun 28, 2013

I have been struggling to root my new tablet for 2 days now without success.

I also have apple devices and jailbreak them for years without any problem but today I am completly stucked.

I am unable to intall correctly the ADB Interface... It is impossible.

I tried to install, desinstall, reinstall many times the usb drivers. Restart the computer many times...

I tried the SDK android tool with installation of the USB driver package v7.

I still have an exclamation point on the device !!

When I try to install the drivers, it always tells me:

"An error occurs during the hardware installation A service installation section of the INF file is not valid".

I am under XP 32 bits SP3.

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General :: SlimKat - Backup Interface And Navigation Settings?

May 30, 2014

I have found myself resetting to factory default, and having to reconfigure the settings all the time, for example, in System Settings > Navigation > Navigation bar. Is there a way of backing these up, and restoring?

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General :: Android Access To Ubuntu Instance On Amazon Web Services (AWS)

Jan 6, 2013

I currently have an AWS instance running Ubuntu 12.04 and use NoMachine NX client to access via FreeNX. I also have the Java in place on the instance and that gives me access from any device with the NX client installed or via a web browser that runs Java JRE.

Ubuntu Desktop version is from here: [URL]

Unfortunately I cannot find a way for either of those methods that is compatible with Android on my Samsung Galaxy Note 2 (great phablet by the way).

how I can might be able to access my Ubuntu Cloud Desktop on AWS from my Android device? I don't mind rebuilding the instance if there is a good way to do this.

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General :: Toshiba Excite 10 - Adding Interface Language Without Flashing

Aug 25, 2013

I have the Toshiba Excite 10 (AT300), I understand that there is no possible way to flash it with another version... I need to add the Hebrew Interface language.

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General :: Lost Samsung UI Interface And Menu (I9500 S4 Clone)

Mar 28, 2014

I've bought 2 days ago the Samsung S4 I9500 China Clone & got eMMC clear or erased somehow during setting. How to recover this eMMC..??

Now when i turn it ON:

- Boot display is "ANDROID" & All application is in China based screen.

- No "Samsung Galaxy S4 I9500" Boot Screen or Samsung S4 Interface

- My personal application is gone

- I've lost Anything in terms of Samsung UI and Menu

How can i bring it back, i have flash the original BackUp ROM that comes with this phone, but the problem is still there...

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General :: Change System Settings Interface And Ribbon Effect To Default?

Aug 25, 2013

My OEM's preloaded rom is almost-nearly stock, apart from 2 things:

1. White background on "system settings" interface and not the default holo. Cant that be changed to default?

2. Ribbon effect instead of flash-light in holo effect, which tbh is quite annoying, because the ribbon effect is also quite large and in slower animation speed so that,s 1 second of frustation everytime i scroll to the end. (Yea, 1 second isnt much but, add those up and it gets annoying really fast)

How can these be changed back to default without installing a custom rom?

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Android :: Creating A New Class Using Eclipse New Java Class Dialog Box

Jul 7, 2010

I'm creating a new class, using eclipse "New Java Class" dialog box. I can write the superclass I want (I can't find using "browse" button), but I can't write or select an interface to implement. I click "add" but ther is nothing to select. What I'm doing wrong?

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