Android :: Sobel Edge Detection

May 30, 2010

As part of an application that I'm developing for Android I'd like to show the user an edge-detected version of an image they have taken (something similar to the example below).To achieve this I've been looking at the Sobel operator and how to implement it in Java. However, many of the examples that I've found make use of objects and methods found in AWT (like this example) that isn't part of Android.My question is then really, does Android provide any alternatives to the features of AWT that have been used in the above example? If we were to rewrite that example just using the libraries built into Android, how would we go about it?

Android :: Sobel Edge Detection


Android :: 1.5 Bug With Earphone Detection

May 5, 2009

On my Google dev phone there is a problem with the new 1.5 version in combination with an official HTC adapter cable YC A300 and 3.5mm earphones. Android doesn't recognize the earphones (it worked on 1.1!). Android still recognizes the HTC earphones with ExtUSB.

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Android :: How To Use Accelerometer Detection

May 20, 2010

I want to know how to calculate the accelerometer movement.When i place the mobile horizontally in idle state and similarly when i place the mobile in hands,So there accelerometer value change when it is place horizontally or while it is in hand vertically.How To Identify them,Any Sample Codes will be useful.

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Android :: Shake Detection On Emulator

Apr 30, 2010

I am pretty new to android. I have a use case where I need to detect a shake and show some images in my application. Can I test shake functionality on android emulator ? What are the other alternatives apart from testing it on a real phone ?

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Android :: Motion Detection Using Camera?

Jun 6, 2010

Is this possible? How do i do it? I want to learn but dont know where to begin even

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Android :: Accelerometer False Detection

Oct 27, 2009

I have a code snippet to detect accelerometer movements. It works some times by properly detecting slight movements, but sometimes it detects movements when I kept my device idle too. Are there any problems with built-in accelerometer detection on Android?

I use an HTC G-1 device. My code snippet is below. How do I resolve it so I can detect small device movements but not detect anything when the device is idle?

CODE:..............

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Android :: Increase Hit Detection On ItemizedOverlay

Sep 23, 2010

I have an itemizedOverlay extended and I want to increase the hit detection on the OverLayItem's if this is possible?

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Android :: Runtime API Level Detection

Apr 27, 2009

I'm trying to product a binary that is compatible with 1.1 and 1.5, but i'm having trouble with the ViewSwitcher class behaving different. I'd like to create a wrapper for it, but I need a way to programatically detect the api level at runtime.

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Android :: Face Detection In Phone

Nov 8, 2010

I am currently working on an experimental camera app. I'm looking into implementing face detection at the moment and am currently weighing up my options.I have considered the OpenCV port available for android and using their face detection functions, but from demos I have seen of previous implementations the camera seems to lag a lot.Considering the camera on the HTC desire has face detecting, I know it must be possible to get at least a semi decent face detection system in place. I was just wondering if anyone had an opinion on how I could get the best results.Using an available library? Implementing a particular algorithm myself?

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Android :: Using Face Detection Program

Nov 5, 2010

Has anyone ever used the API for face detect in their android program?More simply stated, can I have a java class that pulls up the camera, scans a person's face and returns parameters back into the program?

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Android :: Froyo - Killed Application Detection?

Jul 29, 2010

On Froyo, we found that some new "Task Manager" apps are now using the ActivityManager.killBackgroundProcesses() to kill apps. When this happens, Intent.ACTION_PACKAGE_RESTARTED is no longer fired. How can I find out that my application has been killed? I tried to start a service, and I do see this message printed in logcat:

W/ActivityManager( 2426): Scheduling restart of crashed service com.example.android.apis/.app.RemoteService in 20000ms

However, the service is never restarted as advertised, if the app is killed using the killBackgroundProcesses API. (If I go into adb shell and kill the service process, the service will indeed be restarted ...) This looks like a bug anyway, because the notification created by the app is no longer removed like in eclair (the StatusBarService, and a bunch of other system services, depend on the Intent.ACTION_PACKAGE_RESTARTED broadcast).

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Android :: Enter Button With Finger Detection?

Apr 2, 2010

I'm working on a soundboard, however I've got a problem when it come to drag the finger over the screen to play the sounds for the buttons I drag the finger over.Do anyone know how I can detect when a finger enter a button and not click the button?

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Android :: Google Sky Map A Little Off / Orientation Detection Of Phone?

Jul 1, 2010

I've been trying out Google Sky Map and it seems a bit off. I hold my phone in landscape mode and point it at the moon as if I were going to take a picture of it. The application shows the moon about 5-10 degrees off from where it actually is. Is this just the accuracy of the compass and orientation detection of the phone?

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Android :: Simple Bluetooth Presence Detection

Apr 12, 2010

Really general, very new to bluetooth. Can we have one android device broadcasting a simple 'hello' bluetooth network (maybe a radius of just a few feet) - then when other android devices come into that area, reply with a 'hello' back? The client devices moving through the 'hello' radius wouldn't need to be always be checking for presence. I'd let the user open an app and check for bluetooth networks nearby. If they find one of these hubs, they can then choose to broadcast back a hello.Is that at all possible? Any general info would be great.

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Android :: Complex Object Collision Detection

Nov 29, 2009

I am currently working on a collision detection routine for an Android based game which is capable of handling complex concave curves in 2D. I use complex in this post to describe any non-trivial, arbitrary shape (beyond circles, squares, etc). My problem is that all of the various methods I have come across are either too simplistic to be realistic or too complex for a cell phone. At the moment I am favoring a tile-based scheme but I am having problems figuring out how to do this with convex curves that span several tiles and may have several line segments per tile. I gave some thought to representing the curves mathematically, with each tile being an interval of the function, but there will likely be points where the curve doubles-back on itself (think the big loop at the top of a pinball table that brings the ball all the way around the table and back the direction it came). My questions boil down to:

1. Does anyone know of a way of hit testing a given simple shape (e.g. a circle) against a concave series of line segments (shapes beyond circles can be figured out from there) beyond just a Boolean result?

2. What is the best way to represent large, complex shapes programatically? I am currently favoring an XML file describing my levels and the objects in them with shape/position/physics/etc. data to be parsed in during load time.

3. Is there an altogether better way of doing this beyond line segments?

The one saving grace in this conundrum is that I know the vast majority of the objects are stationary with, at most, three or four (usually one) dynamic objects moving around.

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Android :: Voice Activity Detection In Phone

Oct 15, 2010

I am writing an application that will behave similar to the existing Voice recognition but will be sending the sound data to a proprietary web service to perform the speech recognition part. I am using the standard MediaRecord (which is AMR-NB encoded) which seems to be perfect to speech recognition. The only data provided by this is the Amplitude via the getMaxAmplitude() method.I am trying to detect when the person starts to talk so that when the person stops talking for about 2 seconds I can proceed to send the sound data to the web service. Right now I am using a threshold for the amplitude that if its goes over a value (i.e. 1500) then I assume the person is speaking. My concern is that the amplitude levels may vary by device (i.e. Nexus One v Droid), so I am looking for a more standard approach to this that can be derived from the amplitude values.

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General :: WMP / MTP / Android Audio Format Detection

Mar 5, 2014

According to the MS website, Windows Media Player queries an MTP device to see what formats it supports. My Razr Maxx HD supports ogg and m4a. When attempting to sync WMP does not sync those files stating they might not be supported on the device. Being that I've had so much trouble in the past even getting any of the Android devices to be properly detected as an MTP device I'm worried this is a driver issue.I should be able to get WMP to at least convert them.

this is the device mis-reporting the formats, Windows not querying them properly, or an actual WMP issue? Would like to be able to get sync working without any conversions. Maybe there is a way to hardcode formats within the mtp inf file?

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Android : IPhone / Droid Swipe Detection For Mobile Browser

Jun 30, 2010

Is it possible to detect that the viewport is being dragged by a touch event?

Using the following code I am able to get the position of where the finger touched the screen, what node started the event and where it was dragged to. Which solves one of the problems but I would really like to detect when the user has dragged the page/window/viewport down.

To attempt to be more clear as to what I am trying to do: I would like simulate the refresh activity in Tweetie 2/Twitter for iPhone but in HTML5 and JavaScript. Code....

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General :: Alcatel OT 990 - No USB Detection?

Jun 6, 2012

Ive got a Rooted and Unlocked to any network OT 990, I have a problem when trying to connect the USB cable Nothing happens apart from the phone charges, Windows does not detect the phone. Have tried in XP and Win 7.

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Android :: How To Toggle To Use Edge Only?

Jun 24, 2010

Is there a way to toggle or even an app to use edge only? I have the HTC Aria, and can't seem to be able to select network. It's greyed out, and not sure why. It's my first android.

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Android :: GSM Security - EDGE Or 3G

Aug 1, 2010

I stumbled upon this article yesterday:
Hacker Spoofs Cell Phone Tower to Intercept Calls | Threat Level | Wired.com

I realize that there is a relatively small number of people who would actually try to do such a thing to intercept calls (and potentially data at some point with some tweaks), but assuming that this can easily be done and such, how big of a deal is this really? I'm not too well-versed when it comes to cell phone communications technology, so I'm just curious if anyone here can offer any opinions as far as just how vulnerable this leaves those of us on networks that use GSM like AT&T and T-Mobile. The article mentions that the hacker was only really able to make it work on 2G. Does that mean we're okay as long as our phones show we're on EDGE or 3G?

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Android : O2 GPRS - EDGE - G3 And H

Jun 14, 2010

I have recently upgraded to the HTC DESIRE on o2, So far all I have seen is the "G" = GPRS, so far I have not seen 3G, E, or the HDPSA or what ever it is :-). Does o2 support anything else but "G" on this handset etc etc, or is my phone faulty ? I live in the UK and so far today I cant even use my internet - O2 have said there are having issues with 3G but didnt say where in the UK or maybe this is Nation Wide ?

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Motorola Milestone :: USB Connection Detection

Jul 10, 2010

I've had a Milestone for about a month now and have noticed that it seems to have problems detecting that the USB cable has been connected.Sometimes when I connect it, to the mains charger or to a PC, it doesn't indicate that anything has happened - no USB notification and no lightning symbol on the battery to show that it is charging. If I power the phone off and then connect it the phone turns on and shows the USB notification.Has anyone else experienced this or should I look at getting the phone exchanged?

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HTC Desire :: Face Detection Capabilities

Sep 16, 2010

does anyone know how does face detection work in the desire's camera. i have it enabled but i don't see any changes. any ideas guys?

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General :: Home WiFi Detection

Jul 26, 2012

Is there any way to have my wifi automatically turn off when i leave my home wifi connection? I'm trying to not have it continue to search for signal ans drain bay when not in range at home

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Android :: How To Get Connectivity On Gprs / Edge?

Jun 29, 2010

I am currently in China and therefor run a VPN on my PC to connect to the outside world, I would also like to run the same VPN (PPTP) on my android. I can connect via VPN if I am using WiFi but when I try to connect over GPRS/Edge I can't get any connectivity. All web pages load with the standard "web page not available" and apps, eg. the market place, won't connect either. I would have thought that if it was a carrier issue (CMCC) I wouldn't be able to connect to the VPN in the first place. So is this a Android issue, a setup issue or a carrier issue? And can you actuality run a VPN over GPRS om Android?

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Android :: Want To Turn On Gprs / Edge Via Sms

Dec 16, 2009

Is there any app or some thing like that, that I could use it to turn on mobile Internet 2G (EDGE/GPRS) or 3G (UMTS/HSDPA). I now turn off/on mobile Internet with Toggle Data widget, that changes APN type to "-" so it can't work. I am asking this because i use GPS tracker app. And I can turn it on with sms with code: "gps_tracker_start But if i want to report my location I need to be connected to Internet. So I could see my android phone even if it is not connected to internee. So is there any option to turn on mobile Internet remotely?

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Android :: Want To Push Email Over Edge

Oct 18, 2010

I was going to setup push email with my Edge connection (live in Pakistan, only connection available) Was going to do my APN settings. But came across a post which said that some apps required only edge but that some of them needed WiFi or 3G as well. So i was wondering, Does g mail app/ goggle Sync need Wifi/3G or am i good with just edge network Internet?

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Android :: Connect Two Phones Over 3g / Edge

Jun 11, 2010

I am new to this forum and I would like to throw out this question and hopefully someone can point me in the right direction. I am developing an Android application and I would like to setup a tcp/ip type of connection between two Android phones using the 3G/Edge network. My test version will establish a connection if I have both phones on a lan using wifi but when I use T-Mobile's network a connection is not established. Could this issue be a port or ip address?

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Android :: How To Set Color Of ScrollView Fading Edge?

Apr 14, 2010

I have an Android scrollview with a white background. The fading edge is a white translucent gradient. I would like to change it be black instead of white. I have a ListView in the same project with a white background that has a black fading edge by default, but I can't find where (if anywhere) that was set.

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