Android :: Accelerometer / Orientation For Rolling Ball Code?
Mar 23, 2009
If 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?
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Mar 2, 2010
Please tell me how i can stop the change in orientation of application when device rotate. How i can control the accelerometer.
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Sep 17, 2010
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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Oct 30, 2009
Or it's just some virtual sensor the uses the data provided by the accelerometer and the magnetic field sensor to calculate the orientation?
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Sep 8, 2010
when i go to the home page the ball always pulls to the left and wont let me move any other way besides left. its giveing me alot of problems txting and just moveing around my phone.
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Jun 9, 2009
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.
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Nov 24, 2010
It is possible to set the orientation of an activity in the manifest file. but is it also possible to do it from code? if so, how?
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Oct 19, 2010
Rolling back to Velocity .2 after using .3 and apps to sd. Have had stabilty issues and just need to know if the partion needs to be removed from my car before flashing back to .2
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Jul 2, 2012
I have installed the cyanogen mod in my desire Z but the market is not working.
(1) the market was not present in the first place, so i had to download and install it...but google play is not working, whenever i select google play, it comes back to the home screen.
(2) i have'nt kept any nandroid backup, and i've made the permanent root on the phone with with mod.
(3) now i want to revert back to the stock rom, but i cam unable to do so....how to roll back to the sock rom.
(4) i have tried to flash the roms from this thread [URL] ... ... trired both the methods. but didnt work!
I desperately need a solution for either (or both) of these:
(1) a way to make google play & android market work
(2) to roll back to the stock rom ( link to a desire z stock rom and instructions on how to do it! )
so, is there a way to get my phone back o the way it was? (normal 2.2 /2.3 stock)
here are some screen shots from the current about phone:
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Jul 17, 2009
I cant find a way to set the orientation on my SlidingDrawer when i change from landscape mode to portrait mode visa versa. Initially i set the orientation by xml to vertical. I need to change the orientation to horizontal when the phone is in landscape mode, so i get the handle on the left.
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May 14, 2009
I have created an activity for my game which handles all orientation changes by itself and has a fixed "portrait" layout. Actually it uses the accelerometer and is rendered using 2D canvas methods. If the level has been completed I show up a highscore dialog in which the user can enter his name. The dialog is floating above the underlying level screen which gets blurred out nicely. This generally works.
Problem is that the dialog does not get rotated if the orientation of the phone changes. So even if the keyboard is exposed the dialog is shown in portrait mode instead of landscape. I have tried to use an activity with dialog theme instead but the behavior didn't change. After several tries it seems that I have found the reason for this: Once there's an activity with fixed orientation in the activity stack then all subsequent activities keep this orientation, too. They will not react on orientation changes anymore (e.g. if the keyboard gets exposed).
After upgrading to 1.5 SDK the described behavior changed a little bit. Now at subactivities indead react on orientation changes like expected. However, the need to have an opaque background! That means that neither dialogs nor activities with dialog theme will work. Those will stick with the orientation of the underlaying activity. So my workaround is to first start a sub-activity with an opaque black background. This activity then shows my highscore dialog on top. It looks quite okay but I wonder if there's a better solution? Is it possible to show a dialog above a fixed portrait or landscape activity which automatically adapts to orientation changes?
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Aug 19, 2010
I understand how to force a specific orientation per activity in the android manifest. I would like to know if it is possible to allow the keyboard to change orientation even though the activity(the layout really) must remain unchanged.
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May 30, 2010
I thought for sure I would find one in the marketplace....
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Jul 17, 2009
I have a problem with working with the ORIENTATION values of the SensorManager. I would like to have some kind of 360°-value which directly shows me if the phone is in normal portrait (0°), landscape, portrait turned around (180°) or anything in between. So I could have, for example, an arrow that points to the floor (like gravity would do with a plummet) all the time, no matter how I tilt (sidewards) the phone. I thought this would be easy, but I'm pretty confused at the moment.
First of all, the X value of the orientation-array seems to correspondent with how I turn the phone, BUT: if it's completely uprightly standing, this value is about 60° ... why not 0° (or 90°, 180°, 270°), as I would expect?
Second: The value resets if I turn the phone and Android automatically changes screen orientation. So both in Portrait and in Landscape mode it will be sth. like 60° when the phone is in a 0° angel in real world. I set "android:screenOrientation" to "landscape" but this doesn't help anything :/
I want the app NOT to change orientation when I turn the phone, but I want it to get a continuous orientation value when I tilt the phone.
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Jun 12, 2010
We need a skee ball game for android does anybody know of one?
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Nov 11, 2009
I wud like to know if it's possible to get the tracker ball to flash when i get msgs with any of the txt msg software on the market namely chomp/handcent? I can only get it to work with the default app but not with the 3rd party software. Im a txt junkie n i think the flashing tracker ball is a great touch without turning ur fone on every time to chk.
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Jan 27, 2010
Anyone know where I can download this Boing ringtone and what app it is included in? It's on the i phone market and I'm trying to see if anyone else has it or knows where it's at. It makes a sound like you would hear in an old cartoon.. boing, boing, boing.. like a ball bouncing or something.
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Nov 11, 2010
How to move ball on particular angle in android canvas?
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Aug 1, 2010
My question is, in car dock mode/ my location it has me traveling south or downward, how can I Get the my location ball or arrow to face upward or north?
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Jun 27, 2010
Ok here is another thing that gets me. I just got done trying some games that uses the track ball button to induce action. Of course we don't have one. Is there any way to play these things without a track ball? My preference is to not have a trackball but now it cripples some apps.
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Oct 5, 2010
So I am trying to switched to Evil Eris from KaosFroyo just cause I want something different. But it seems that whenever I try and go to System Recovery to wipe everything there is a problem because I can scroll down to click on wipe or anything but when I press it down it will reboot. Is there any fix to this problem.
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May 29, 2010
I have no notifications, but it keeps flashing anyway. Any idea why?
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Nov 2, 2009
I've had the Hero since 10-29-09 and the scroll-ball light is always on, it never shuts off ... It's driving me CRAZY. Also; the light pulses very lightly. Like it has a short or something. I've checked all my messages, settings and I can't find the problem. Has anyone had this problem? How did you fix it? I don't really want to go to my local Sprint store because I'm sure they have no idea.
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Oct 21, 2009
I have had my instinct since 10/15 and the track ball is already getting dirty and sticking. i have never used a phone with a track ball before so i am looking for tips and advice on how to clean it and keep it clean.
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May 9, 2010
Is the track ball supposed to wake up the phone?
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Feb 9, 2010
So a guy I work with has a Droid Eris and the ball will light up when he has a missed call or a text. Is there a way to get the Hero (sprint) to do this? Also it seems the phone has two lights on the front? I have only seen the red/green light, light up.
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Nov 7, 2009
All other directions work. Not sure if this was the case straight out of the box, as hardly use the mouse wheel / ball. Anyone know if this could be an 'out of calibration' problem that can be adjusted, or is it just broken? Have to admit dropping the phone once, but not that hard!
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Sep 22, 2009
Only had my Hero for 3 days but something I have noticed has happened twice and is happening at the moment.
I have no new notifications but the tracker ball is lighting up every 5 seconds or so. What does that mean?
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Apr 5, 2013
I baught the apk from the app store and it works fine(no crushes at all) but when it comes to download the patch in the beggining it frozes to 0% although the circle above indicates it is loading,after some min a black screen with sone japaneze letters shows up and i dont know what they mean?
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Dec 2, 2009
I have my trackball notification set to light up on new mail but it never does. I'm using the gmail app built in. Does this only work with the built in HTC mail client?
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