There are some shortcoming for system's rotate screen function:
1. It is too sensitive to result in many unwanted rotating actions.
2. Accelerometer consumed power greatly. I want disable it and control screen orientation by my own program. Is it possible?
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Or it's just some virtual sensor the uses the data provided by the accelerometer and the magnetic field sensor to calculate the orientation?
View 7 Replies View RelatedWhere can I find a simple example application that uses the Accelerometer Sensor?
I've seen the Open Intents applications, but I'd rather use the raw Android API, at least until I understand it a little better. I'm surprised at the lack of documentation.
We are writing an application that uses acceleration sensor data to plot phone's movement in 3D. We are finding gross inconsistencies in the actual data output by the sensor. Also, sampling rates vary greatly from 8 to 200 millis. (using System.currentTimeMillis())
Specifically, when we try to draw a circle with G1 flat on the table all the time (filtering out gravity accel 9.8), most of the time we would get a plot of phone's position that is not a circle at all. Lots of times, it would be close to a straight line. Sometimes, it would start drawing an arc, but would not close the circle shooting off in a random direction.
We tried to eliminate the time variable, by substituting a constant time sampling rate (10 millis) to calculate phones position, but the result was very close to what we had before (shapewise). Also, the acceleration in Z direction when the phone is displaced lying flat on a table (XY plane) varies too by +/- 2 units which is a lot.
I do not think it is an error in our code, as we have checked it many times. If there were an error indeed and the accelerometer worked properly, we would see a consistently wrong depiction of the phone's movement. Unfortunately, repeating the same movement (circle) would produce sometimes wildly differently shaped plots.
It all comes down to us wanting to know if that is indeed the case that the G1 accelerometer is very unreliable and inconsistent device when used for more or less precise measurements? Is there some documentation/facts paper that would tell us just how reliable accelerometer is?
I have an app where the accelerometer runs in the background and continues to read values from the sensor even after the activity exits.
View 4 Replies View Relatedi develop an map application. One feature from my map is, it can rotate.I already develop map that can rotate using orientation sensor. But now, i need to develop it without sensor.So, it's possible to get an angle from 2 coordinates (last position and current position )with atan2 and use it to rotate the map ?
View 1 Replies View RelatedWas trying to go back to 2.1 from 2.2. RSD flash failed, had to unplug phone. Now the boot loader screen says CODE CORRUPT and Cannot Program. I can only get this message when plugged into the wall charger. If i plug into USB to PC i get just a green light where the power light is any help or suggestions would be appreciated.
View 9 Replies View RelatedI have a HTC Magic (Rogers Canada).And, I see how the Dream (G1) rotates the home screen. can the Magic do that as well? Also, anybody know if it's possible to rotate the screen to the right and not just to the left? Shouldn't the acceleromater detect all the different rotated modes (even upside down?). that'd be cool
View 1 Replies View RelatedIf I'm reading things right, the accelerometer measures physical forces (i.e. movement) and the orientation sensor gives the tilt of the handset. If you are coding a rolling ball type app which would you use? You could argue accelerometer, in which case you measure each delta force and apply it to your balls physics. Or just the orientation and compute the effects of gravity again on the ball but just using different physics. Is there a preference? Would any be more accurate than the other?
View 3 Replies View RelatedI am getting error when I rotate the device (it was HTC with Verizon):
The application My App (process com.mycompany.android) has
stopped unexpectadly. Please try again.
So, I think I need to code for this issue. In order words, when rotate the device from landscape to portable or from portable to landscape, application needs to catch this event.
Is it right ?
How to make it ? What is wrong here ?
Is it possible to test on the emulator ?
Is this possible to access a sensor data form native code without using Java at all? I need to access to the sensor as fast as possible, but it seems like the "DELAY_FASTEST" parameter when registering an event change is not fast enough.
View 3 Replies View RelatedHow to do Android 3D Application Pinch Zoom Pan Rotate?? can any one give me code for the same written inside ontouchEvent method
View 2 Replies View RelatedHow does PicSay move/resize/rotate an image on top of another image. Can someone please share some sample code/ideas on how to do this.
View 2 Replies View RelatedI have implemented rotation of a custom view which runs perfectly on Emulator,but the screen goes blank without any error. When i disable the animation in code[commenting the lines] the view appears on device.
Please help me out. if there is any fox for this.
I am developing a game. In which the user controls movement using the accelerometer. Sounds effects can also be enabled. However when laying the phone flat down and playing the game without the accelerometer gives nice 0,0,0 values. However when play WITH SOUNDS on, i get a buch of weird values: while the phone is NOT moving.
This is really a big bug that makes life hard for Game Developers. I tried to take an avarge of the last 5 values from the sensor.. but this is not enough.. The harder the sounds plays: the higher the weird sensor values. When using the headphones: almost no weird values. Seems that sounds interferes with the accelerometer sensor.
Currently it seems that locking the screen automatically turns off the accelerometer. I looked around for quite a while and didnt find any solution for that. Is that intentional? It would be really helpful to know if this is how it is or if I just didnt find the solution for that so far.thank you for any help on that (and as I said, even "doesnt work right now/on purpose/.
View 5 Replies View RelatedAs I understand it, there seems to have been a change in the OS that prevents the accelerometer from running when the screen turns off and the phone CPU goes into its power saving state.Can this be confirmed?I have gotten around this by using a wake lock, but this is a much less than ideal solution as it drains a lot of battery.If the accelerometer was disabled in low power mode to save the battery, it may very well have the opposite effect in many cases, such as mine.A partial wake lock seems to be required to keep it running, which is obviously much worse than if just the accelerometer were running without the need for the wake lock.Are there any other workarounds anyone knows of to getting accelerometer values while the phone is in low power mode?Also, are there any plans to change this in future versions of the OS?If there are no plans to change this, I would definitely like to petition for this to be changed.
View 14 Replies View RelatedI am developing a small application for learning purpose which will move image when accelerometer readings change. I want a mapping of accelerometer values to screen coordinates. I am using trial and error method rite now. But it seems that it will not help. Is there any algorithm??
View 2 Replies View RelatedPlease tell me how i can stop the change in orientation of application when device rotate. How i can control the accelerometer.
View 5 Replies View RelatedThis used to be (what I thought was) a hardware problem with the G1 at some point, but I thought it was resolved for the Droid.
View 2 Replies View RelatedCan I get current SDK version (like 1.0 or 1.5)in the program code?
View 4 Replies View RelatedIs there a way to read a Notification in the program (via code!)?
View 4 Replies View Relatedis it possible to manually rotate the screen or fix the current screen orientation (with a key/button)? because it really annoys me having taken portrait pictures that cannot be viewed (with the media gallery application) in a portrait fashion on the milestone. this is because it always rotates the portrait picture back to landscape when rotating the milestone from landscape to portrait. right now there is no way of properly viewing portrait pictures on the milestone other than tilting your head (holding the milestone landscape and tilting your head along).this cannot be the way it was intended to be, right? or do I have to get a different viewing software which allows you to choose screen orientation? is there such an app?
View 1 Replies View RelatedI have a HTC Hero here, and when I tried to get the list of available sensors on the device by calling ((SensorManager) getSystemService (Context.SENSOR_SERVICE)) .getSensorList(Sensor.TYPE_ALL); I get only the following sensors: D/SensorManager( 6302): found sensor: BMA150 3-axis Accelerometer, handle=0 D/SensorManager( 6302): found sensor: AK8973 3-axis Magnetic field sensor, handle=1 D/SensorManager( 6302): found sensor: AK8973 Orientation sensor, handle=2 D/SensorManager( 6302): found sensor: AK8973 Temperature sensor, handle=3 According to the specs, there should be a light and a proximity sensor on the Hero, and I've seen it in action (the automatic screen brightness adjustment) - so at least the ambient light sensor is definitely there. My question is then, why doesn't the getSensorList return for me the light and the proximity sensors?
View 8 Replies View RelatedDoes anyone know the difference between the orientation sensor and magnetic field sensor on Android?Since I've read that magnetometer is synonymous with digital compass I'm a little bit confused. What are they really?
View 1 Replies View RelatedIf it could turn to the right as opposed to the left, typing on the landscape keyboard would be much easier. The botton of the phone would not get in the way. Just wondering.
View 1 Replies View Relatedwhat i wont for example my g1 is Orentation enable and when my app start with screen rotate 90 then should be no rotating you know help me exam code pls.
View 2 Replies View Relateddoes anyone know of an app that will turn the autorotate on / off from within an app on long search key press (or another key press)?I have searched the market / google and can't find anything..
View 6 Replies View RelatedAre there any 3rd party apps out there that rotate the screen 180 degrees? I can't seem to find any.Most times, I find it easier to use my Cliq if it is upside down (such as listening to music and charging.)
View 2 Replies View Relatedhow to program/write code on a "webview" in Android for loading a html file?
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