Android :: Calibration With The Environment May Improve The Readings?
Jun 9, 2009
Reading the sensor API (http://developer.android.com/reference/android/ hardware/SensorManager.html) The section about ACCURACY speak about calibration:
"calibration with the environment is needed"
How do it calibrate?! Is this software calibration? Phone specific calibration??
I don't see any methods to calibrate.
Using the HTC Magic the compass often give me crazy values like if I was on the magnetic pole. I feel pretty scared and hide under a tinfoil hat just in case...
So any url, doc or explanation!
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Jul 31, 2010
removing the g factor from accelerometer readings. I am using SensorEventListener with onSensorChanged() method for getting Sensor.TYPE_ACCELEROMETER data. I need only pure acceleration values in all directions. So at any state if the device is stable (or in constant speed), it should give (0.0,0.0,0.0) roughly.
Currently, depending on its pitch and roll, it gives me variable output depending on the g forces acting on each axis. I hope there is some formula to remove this, as I also get orientation values (pitch and roll) from Sensor.TYPE_ORIENTATION listener. I had used some but didn't work.
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Apr 20, 2009
Does anyone know how to convert the accelerometer readings from g's to degrees?For example, if I want to use the x-axis readings and measure the tilt of the phone, flat would be 0g = 0 degrees and a 90 degree tilt to the right would be 1g (9.80665 m/sec^2).I can't come up with a formula for say 20 degrees or 45 degrees. Any help would be greatly appreciated.
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Dec 26, 2009
I've noticed that I get a slightly different reading from the compass depending on how I hold the phone. If I hold it vertically, its different than when I hold it horizontal (ie parallel to a table or floor). Does anyone know the most accurate way to hold the phone for the compass?
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Mar 11, 2010
Which permission needs my application to get access to the location of the user on Android?
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Jun 20, 2010
On threads about the lag issue it was recomended to do a g-sensor calibration. Before I did one I had no noticible lag but the posters said this would increase responce. So I did a g-sensor calibration and now I have a noticible lag while scrolling. Any thought on this and what could be happening. The fact that the response changed gives me hope it could be corrected through settings or software updates. But just maybe it is a bad idea to follow all advice one sees on here.
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Aug 31, 2009
When I download the source and build it according to http://source.android.com/download, then try to build the eclipse dev evironment as described on http://source.android.com/using-eclipse, I get 100s of Java Errors when trying to build the project.
Linux is 2.6.28-15-generic #49-Ubuntu Eclipse is eclipse-java-galileo-linux-gtk.tar.gz
18# java -version java version "1.5.0_18" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_18-b02) Java HotSpot(TM) Client VM (build 1.5.0_18-b02, mixed mode, sharing) 19#
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Nov 20, 2010
Stupid question probably, but I've lost my G-Sensor Calibrator. I am currently running Vanilla Tazz Android Version 2.2.1 on a Droid Eris. I'm new to this all and I'd like some guidance.
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Jul 10, 2010
I don't think this was always the case but my HTC desire won't switch to both horizontals, only one. I have done a reboot and a calibration, the calibration looked fine too.
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Jun 30, 2010
Since I know about the known issue of Hero G-sensor not able to save the calibration. I waited till I get the 2.1 hoping this will fix the issue. Right now. Nor does it not fix the issue I cant find the option anymore Bubble calibrates and remebers okay. But those apps like google sky or teeter arent affected by that Some apps have their own calibrations like bubble - works well or papi jump. But abduction with its own calibration wont work. Suspecting that google sky map and others wont work either. Anyone happy with 2.1 (+ more issues in this forum) like me? And anyone know where i could find the setting in 2.1? Am either blind or its not there. The advice with the tapping and turning and tapping etc did it work for anyone?
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Jul 1, 2010
I may be missing something here, but I can't see a way of calibrating the Swype keyboard for when you need to tap individual keys instead of swyping as usual. On my Desire the keyboard is well out of alignment. Can anyone help? Swyping itself works a dream
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May 26, 2010
Is there a calibration period for battery meters?
I've been using BatteryTime Lite with my stock Incredible battery. With the battery fully charged, it typically states I have 373 hours of "idle" time and 3 hours 12 minutes of talk time.
Last night I installed the Seidio 1750 and let it charge with the phone off for 12 hours.
This morning the app said I had 373 hours of "idle" time and 3 hours 12 minutes of talk time on a full charge.
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Apr 30, 2010
I think my optical track pad is not calibrated. Sometimes (often) when I unlock my phone, the screens start automatically shifting to the right. If I manage to open an app, the selection keeps going to the right. For example, if I am in a text message and am trying to move the cursor to a previous work to correct spelling, the cursor keeps moving the right and down on its own. Is there a way to calibrate the optical trackpad? Anyone else having this issue?
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Feb 17, 2014
I bricked my phone 1 year ago. I tried today to reflash it,and guess what? it worked,but there is a huge problem:
As you see in the pictures,the screen is almost destroyed,I think the ratio and/or the resolution is wrong.
The rom is the stock one,but with recovery installed. The touch is also screwed.
1: How can I restore the original ratio?
2: Tried to reflash it,no success: the vcom connected,then after 1 second disconnected. What is the problem?I was working about 30 minutes ago(before the first reflash)
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Oct 4, 2009
I'd like to use python scripts as plugins for an app I'm developing. This seems to be possible by interacting with android-scripting-environment (ASE), as is done by Locale, but I haven't found any documentation about this. How you execute ASE scripts from your own app?
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Sep 17, 2010
For now I've used the classic export command to set an environment variable and tried to read this variable from my test with System.getenv() function, but it doesn't seem to work. how to set and read a system variable in an Android application?
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Nov 2, 2010
I am try to get the android environment setup for phone gap and I keep getting this
error when I try and create the phonegap project.
CODE:...............
I have got through the setup for the last could of days. I have also check the PATH for the android sdks and built the test android app in eclipse.
There are the path in the environment vars
CODE:...................
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Jun 26, 2010
If it's sunny outside, I can't see anything on the screen of my Android device (HTC Desire). Do you have any solution to this?
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Oct 14, 2010
I was just wondering if there was an Android environment that would let you run Android OS inside/alongside Windows, like Virtual PC basically, and let you have full connectivity just like if you were using your phone. I'm not sure what the utility could be right now but it sounds interesting to me.
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Feb 29, 2012
Today i installed nano on my android device. it works but i have to set the following variables manually in the terminal emulator:
Code:
export=TERMINFO=/system/etc/terminfo
and
Code:
export TERM=linux
is it possible to set this variables automatically when the phone is booting?
Android Version 2.3.4
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Nov 16, 2009
I'm just wondering if this is normal: I can go into an app like Google Maps and drop down into street view with the compass view enabled. I'll see that the view will really only point one way and jerk around that one direction as I move it around. I'll then calibrate the compass using the figure 8 method and then street view will work properly. If I then exit back to the home screen and load up say LAYER I'll have the same problem. The compass will point in one direction and jerk around it until it's recalibrate again. It's more of an annoyance really as I basically have to recalibrate it every time I open up an app that uses it. Just wondering if others are having this issue. I've talked to a few i phone friends and other than the occasional recalibration they don't seem to have this issue.
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Jul 21, 2010
Has anyone else noticed how poorly aligned the camera shots are when using Google Goggles? When I click that button to take a picture it's NEVER lined up like it was before. It's even more obvious if I use the crop feature.I can point at a logo and crop it perfectly and hold the phone absolutely still and press the button. When it shows the processing screen it looks like the camera shot is a couple inches below where it showed on the previous camera screen.
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May 8, 2010
So for some dumb reason I wanted to calibrate my G senser,
no big deal right?
now nothing is going into landscape mode.
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Aug 7, 2012
Preferably being able to load color profiles like sRGB or Adobe RGB directly. I'm not reffering to simple RGB settings or Gamma tweaking.
The reason I'm asking is that I work in 16 bit float mostly and got a perfectly calibrated IPS NEC nicely working with a 12bit LUT and also 2 calibrated TN panel screens.
The final image goes to 8bit PNGs and JPGs with sRGB embedded. Now the difference between the final outcome on the IPS screen and the TN ones and the one displayed on 4 different android mobile phones I got available for testing is extremely big. So big, that just everything is off. I thought that embedding color profiles might cause this but using other common profiles or none at all still were extremely off.
I'd like to point out that the image is not necessarily bad, it's just wrong knowing how the end result looks on perfectly calibrated monitors at home or at work.
I'm just surprised that there is close to no information available on how to properly view imagery with embedded profiles considering that the internet is full of fancy mobile phone screen tests and benchmarks nitpicking every single micro millimeter on a screen light years away from normal use conditions. (At least they don't take into account that probably 60-80% of the images average users view on their mobiles are crappily compressed Facebook .jpgs and the rest photographs shot on mobile cameras..but that's not what the thread is about.)
Is there really no way to counter factory presets? It's like with TVs on factory or even worse shop presets with shiny oversaturated colors and crushed contrasts, but on TVs you got the chance to turn the crap off at last.
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Feb 17, 2010
I've just started debugging my first three line long android app and I can't seem to use the debug tool like I want to. Here's my code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
int a = 1 / 0;
}
Now I expect the debugger to halt the thread and show me the line number of statement where the division by zero occurs. No, instead it shows some other method internal to the system for which I have no source. To make the matters worse, there is no exception message either. Prior to this app, I created one which would do something when a button was pressed. If any exception was raised, again no useful line number or exception message would be shown. As of right now, there is no way to debug my app. I'm using the latest SDK along with Eclipse ADT plugin and debugging on a real device (Nexus One).
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Oct 13, 2009
I'm trying to make my app scriptable. Specifically, I need to expose a few Java APIs and make callbacks settable via user-written scripts. Ideally I'd like to hide some of the complexity away in a DSL, but there's no way of accomplishing what I want neatly without some form of user scripting, so I may accept another alternative if it meets my requirements. Initially I looked into Scala as that is my main language of choice, but the Scala interpreter is just a wrapper around its compiler, which I'm told won't run well if at all on the phone.
I've also tried JRuby, which worked under Cupcake. There appears to be a regression in the form of a Dalvik bug that prevents it from working under Donut, however:
http://code.google.com/p/android/issues/detail?id=4242
I've also seen the Android Scripting Environment. Am I correct in assuming that this only supports running full interpreters and not embedding scripting languages into apps?
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May 21, 2010
How to add additional font in android environment? I need to make a font like LCD with pale background numbers like this:
http://www.androidfreeware.net/img2/gps_speedometer_android_1.png
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Dec 3, 2009
I need to implement JNI Programming in android environment. SO if anybody knows about JNI programming in android.please let me know or if you found any useful links or information about this concept please send me .
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Sep 20, 2010
I would like to use self defined Environment variables in my source code.
I use System.getenv() to do this and the code line looks like this. Log.d("MyTest","== MyEnv " + System.getenv("AP") + " ANDROID_ASSETS:" + System.getenv("ANDROID_ASSETS"));
Before I execute my code I define my AP variable with export: export AP="12345" and the this is my output of set command
ANDROID_ASSETS=/system/app
ANDROID_BOOTLOGO=1
ANDROID_DATA=/data
ANDROID_PROPERTY_WORKSPACE=9,32768
ANDROID_ROOT=/system
AP=12345
Then I execute my code and I get this line from logcat
D/MyTest( 5363): == MyEnv null ANDROID_ASSETS:/system/app
The value for my defined Environment variable is null. Any suggestions on why it didn't work?
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Mar 25, 2010
While implementing the BluetoothChat application .apk inside G1 device, it always pops up a message:
$adb install -r /home/parveen/workspace/BluetoothChat/bin/BluetoothChat.apk
-bash: adb: command not found
I am not getting clearly why this error is popping up every time.
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