2014/10/16 上午 08:19:15

android Programming Glossary: meters

Map view following user - MyLocationOverlay type functionality for Android Maps API V2

http://stackoverflow.com/questions/13739990/map-view-following-user-mylocationoverlay-type-functionality-for-android-maps

every 10 seconds and only when movement of more than 10 meters has been detected. private final int minTime 10000 minimum time.. 10 minimum distance between location updates in meters private FollowMeLocationSource Get reference to Location Manager..

How to get My Location changed event with Google Maps android API v2?

http://stackoverflow.com/questions/13742551/how-to-get-my-location-changed-event-with-google-maps-android-api-v2

Android Maps API v2 draw circle

http://stackoverflow.com/questions/13991301/android-maps-api-v2-draw-circle

be correct way of drawing nice circle with given radius in meters Something smiliar to what we had in api v1 with canvas.drawCircle.. EARTH_RADIUS 6378100.0 private int offset 2. convert meters to pixels between 2 points in current zoom private int convertMetersToPixels.. R.drawable.blue circle radius 200 meters int radius offset convertMetersToPixels lat lng 200 if zoom..

How accurate is Android GPS? [closed]

http://stackoverflow.com/questions/1567443/how-accurate-is-android-gps

android gps share improve this question 10 centimeters No chance. In any event Android is just a device OS the actual.. would be something like 30 of your measurements within 50 meters of the true position yes the devices are typically that inaccurate..

Can't run JUnit 4 test case in Eclipse Android project

http://stackoverflow.com/questions/2172152/cant-run-junit-4-test-case-in-eclipse-android-project

My Class public class DistanceUtil public static double metersToMiles double meters return 0 public static double metersToKilometers.. DistanceUtil public static double metersToMiles double meters return 0 public static double metersToKilometers double meters.. metersToMiles double meters return 0 public static double metersToKilometers double meters return 0 My unit test public class..

Google Maps & apps with mapview have different current positions

http://stackoverflow.com/questions/3289039/google-maps-apps-with-mapview-have-different-current-positions

while in my app the location is somehow off a few 100 meters. In my application I basically do the following for debugging.. to the one in my application and they're all some 100 meters off but at least all the same. See the screenshot here http.. The map using the public map api is off a few hundred meters. Seems that we just have to live with it share improve this..

Android - SQlite Getting nearest locations (with latitude and longitude)

http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude

and I want to get the nearest locations to the parameters I put in ex. my current location lat lng . I know that this.. the end point from a given source at a given range meters and bearing degrees . This methods uses simple geometry equations.. point. @param point Point of origin @param range Range in meters @param bearing Bearing in degrees @return End point from the..

Draw A Circle On Android MapView

http://stackoverflow.com/questions/5293709/draw-a-circle-on-android-mapview

projection.toPixels geo pt float circleRadius projection.metersToEquatorPixels mRadius 1 FloatMath.cos float Math.toRadians.. projection.toPixels geo pt float circleRadius projection.metersToEquatorPixels mRadius 1 FloatMath.cos float Math.toRadians.. was calculated using a method that converts from meters to pixels for points at the equator . If however your desired..

What is the real world accuracy of phone accelerometers when used for positioning?

http://stackoverflow.com/questions/6027724/what-is-the-real-world-accuracy-of-phone-accelerometers-when-used-for-positionin

is the real world accuracy of phone accelerometers when used for positioning I am working on an application where.. at a well known fixed location accurate to within 5 centimeters at which point the accelerometer in the phone is to be activated.. with Specific examples would be good such as If I move 50 meters X from the starting point 35 meters Y from the starting point..

Good way of getting the user's location in Android

http://stackoverflow.com/questions/6181704/good-way-of-getting-the-users-location-in-android

speed vs. accuracy ratio. I'm willing to sacrifice a few meters in accuracy if I can get the location almost instant and without.. battery as possible and the location should have X 50 100 meters accuracy. The goal is to later be able to plot the user's path..

How to use Accelerometer to measure distance for Android Application Development

http://stackoverflow.com/questions/6352681/how-to-use-accelerometer-to-measure-distance-for-android-application-development

to return the current acceleration along three axis in meters per second squared m s2 . But I have come to know that an accelerometer.. no GPS What is the real world accuracy of phone accelerometers when used for positioning how to calculate phone's movement..

Calculating distance using Linear acceleration android [duplicate]

http://stackoverflow.com/questions/12926459/calculating-distance-using-linear-acceleration-android

meter you will get something like this total_Accel 0.0 0 Meters total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .25 Meters.. total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .25 Meters total_Accel 1.0 total_Accel 0.5 total_Accel 0.0 if accel is.. 0.5 total_Accel 0.0 if accel is perfectly distributed .5 Meters total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .75 Meters..

Android : Location.distanceTo not working correctly?

http://stackoverflow.com/questions/531324/android-location-distanceto-not-working-correctly

tell my why my distance calculation is showing 12 637 795 Meters android location distance share improve this question You..

Android: How do I set the zoom level of map view to 1 km radius around my current location?

http://stackoverflow.com/questions/6002563/android-how-do-i-set-the-zoom-level-of-map-view-to-1-km-radius-around-my-curren

return zoomLevel The idea is that first I calculate Meters per pixel in the zoom level 1 which according to google shows..

Using gps get the distance a person has walked

http://stackoverflow.com/questions/9664587/using-gps-get-the-distance-a-person-has-walked

static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES 1 in Meters private static final long MINIMUM_TIME_BETWEEN_UPDATES 30000..

Map view following user - MyLocationOverlay type functionality for Android Maps API V2

http://stackoverflow.com/questions/13739990/map-view-following-user-mylocationoverlay-type-functionality-for-android-maps

String bestAvailableProvider Updates are restricted to one every 10 seconds and only when movement of more than 10 meters has been detected. private final int minTime 10000 minimum time interval between location updates in milliseconds private.. between location updates in milliseconds private final int minDistance 10 minimum distance between location updates in meters private FollowMeLocationSource Get reference to Location Manager locationManager LocationManager mContext.getSystemService..

How to get My Location changed event with Google Maps android API v2?

http://stackoverflow.com/questions/13742551/how-to-get-my-location-changed-event-with-google-maps-android-api-v2

Android Maps API v2 draw circle

http://stackoverflow.com/questions/13991301/android-maps-api-v2-draw-circle

code I mean what measure it is And main question what would be correct way of drawing nice circle with given radius in meters Something smiliar to what we had in api v1 with canvas.drawCircle UPDATE OK after improving math I was able to draw right.. Maps v2 bitmap 1. some variables private static final double EARTH_RADIUS 6378100.0 private int offset 2. convert meters to pixels between 2 points in current zoom private int convertMetersToPixels double lat double lng double radiusInMeters.. Style.STROKE icon Bitmap icon BitmapFactory.decodeResource YourActivity.getResources R.drawable.blue circle radius 200 meters int radius offset convertMetersToPixels lat lng 200 if zoom too small if radius icon.getWidth 2 radius icon.getWidth 2..

How accurate is Android GPS? [closed]

http://stackoverflow.com/questions/1567443/how-accurate-is-android-gps

help me out tremendously to know the margin of error I can expect android gps share improve this question 10 centimeters No chance. In any event Android is just a device OS the actual accuracy of a GPS device is dependent on the device's chipset...

Can't run JUnit 4 test case in Eclipse Android project

http://stackoverflow.com/questions/2172152/cant-run-junit-4-test-case-in-eclipse-android-project

the unit test class for me and added Junit4 to my class path. My Class public class DistanceUtil public static double metersToMiles double meters return 0 public static double metersToKilometers double meters return 0 My unit test public class DistanceUtilTest.. for me and added Junit4 to my class path. My Class public class DistanceUtil public static double metersToMiles double meters return 0 public static double metersToKilometers double meters return 0 My unit test public class DistanceUtilTest @Test.. My Class public class DistanceUtil public static double metersToMiles double meters return 0 public static double metersToKilometers double meters return 0 My unit test public class DistanceUtilTest @Test public final void testMetersToMiles..

Google Maps & apps with mapview have different current positions

http://stackoverflow.com/questions/3289039/google-maps-apps-with-mapview-have-different-current-positions

Maps and my application where the Google Maps is very accurate while in my app the location is somehow off a few 100 meters. In my application I basically do the following for debugging purposes now 1 initially place one marker on the map geopoint.. The current locations displayed in those apps are equals to the one in my application and they're all some 100 meters off but at least all the same. See the screenshot here http img33.imageshack.us img33 8679 mapproblem.png Now I am wondering..

Android - SQlite Getting nearest locations (with latitude and longitude)

http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude

thing is I have data with lat and lng stored in my SQLite database and I want to get the nearest locations to the parameters I put in ex. my current location lat lng . I know that this is possible in MySql and I've done quite some research that.. calculates those points for you p1 p2 p3 p4 in picture . Calculates the end point from a given source at a given range meters and bearing degrees . This methods uses simple geometry equations to calculate the end point. @param point Point of origin.. methods uses simple geometry equations to calculate the end point. @param point Point of origin @param range Range in meters @param bearing Bearing in degrees @return End point from the source given the desired range and bearing. public static PointF..

Draw A Circle On Android MapView

http://stackoverflow.com/questions/5293709/draw-a-circle-on-android-mapview

new Point GeoPoint geo new GeoPoint int mLat 1e6 int mLon 1e6 projection.toPixels geo pt float circleRadius projection.metersToEquatorPixels mRadius 1 FloatMath.cos float Math.toRadians mLat Paint innerCirclePaint innerCirclePaint new Paint innerCirclePaint.setColor.. new Point GeoPoint geo new GeoPoint int mLat 1e6 int mLon 1e6 projection.toPixels geo pt float circleRadius projection.metersToEquatorPixels mRadius 1 FloatMath.cos float Math.toRadians mLat Paint innerCirclePaint innerCirclePaint new Paint innerCirclePaint.setColor.. The problem in Scott's answer is that the circleRadius was calculated using a method that converts from meters to pixels for points at the equator . If however your desired point is not on the equator the radius will be too small because..

What is the real world accuracy of phone accelerometers when used for positioning?

http://stackoverflow.com/questions/6027724/what-is-the-real-world-accuracy-of-phone-accelerometers-when-used-for-positionin

is the real world accuracy of phone accelerometers when used for positioning I am working on an application where I would like to track the position of a mobile user inside.. inside a building where GPS is unavailable. The user starts at a well known fixed location accurate to within 5 centimeters at which point the accelerometer in the phone is to be activated to track any further movements with respect to that fixed.. based on the accelerometer these phones generally come equip with Specific examples would be good such as If I move 50 meters X from the starting point 35 meters Y from the starting point and 5 meters Z from the starting point I can expect my location..

Good way of getting the user's location in Android

http://stackoverflow.com/questions/6181704/good-way-of-getting-the-users-location-in-android

is better and sometimes the GPS is better. By better I mean speed vs. accuracy ratio. I'm willing to sacrifice a few meters in accuracy if I can get the location almost instant and without turning on the GPS. Secondly if you request updates for.. so and send it to a server. The app should conserve as much battery as possible and the location should have X 50 100 meters accuracy. The goal is to later be able to plot the user's path during the day on a map so I need sufficient accuracy for..

How to use Accelerometer to measure distance for Android Application Development

http://stackoverflow.com/questions/6352681/how-to-use-accelerometer-to-measure-distance-for-android-application-development

development industry. I know the accelerometer can be used to return the current acceleration along three axis in meters per second squared m s2 . But I have come to know that an accelerometer can also be use as speedometer. I want to know how.. video. Similar questions track small movements of iphone with no GPS What is the real world accuracy of phone accelerometers when used for positioning how to calculate phone's movement in the vertical direction from rest iOS Movement Precision in..

Calculating distance using Linear acceleration android [duplicate]

http://stackoverflow.com/questions/12926459/calculating-distance-using-linear-acceleration-android

a table with the bottom facing my chest to the right for one meter you will get something like this total_Accel 0.0 0 Meters total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .25 Meters total_Accel 1.0 total_Accel 0.5 total_Accel 0.0 if accel.. you will get something like this total_Accel 0.0 0 Meters total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .25 Meters total_Accel 1.0 total_Accel 0.5 total_Accel 0.0 if accel is perfectly distributed .5 Meters total_Accel 0.5 total_Accel.. total_Accel 1.5 approx .25 Meters total_Accel 1.0 total_Accel 0.5 total_Accel 0.0 if accel is perfectly distributed .5 Meters total_Accel 0.5 total_Accel 1.0 total_Accel 1.5 approx .75 Meters total_Accel 1.0 total_Accel 0.5 total_Accel 0.0 1 Meter..

Android : Location.distanceTo not working correctly?

http://stackoverflow.com/questions/531324/android-location-distanceto-not-working-correctly

String str String.valueOf distance meters Can someone tell my why my distance calculation is showing 12 637 795 Meters android location distance share improve this question You should Modify lines aLocation.setLatitude myLocation.getLatitudeE6..

Android: How do I set the zoom level of map view to 1 km radius around my current location?

http://stackoverflow.com/questions/6002563/android-how-do-i-set-the-zoom-level-of-map-view-to-1-km-radius-around-my-curren

2000 metersPerPixel 2 zoomLevel Log.i ADNAN zoom level zoomLevel return zoomLevel The idea is that first I calculate Meters per pixel in the zoom level 1 which according to google shows equator of earth using 256 pixels. Now every subsequent zoom..

Using gps get the distance a person has walked

http://stackoverflow.com/questions/9664587/using-gps-get-the-distance-a-person-has-walked

TestActivity extends Activity implements Runnable private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES 1 in Meters private static final long MINIMUM_TIME_BETWEEN_UPDATES 30000 protected LocationManager locationManager static double n 0..