When I develop an Android map application, I want to draw a circle on the map whose radius is 1 meter. As you known, I can't draw 1 meter directly, I should convert 1 meter to the distance of two pixels depend on the zoom level. How to I convert it, is there anything API I can use.
Canvas.draw(x, y, radius), what value should I put to this method ?
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I have some png files that I am applying a color to. The color changes depending on a user selection. I change the color via 3 RGB values set from another method. The png files are a random shape with full transparency outside the shape. I don't want to modify the transparency, only the RGB value. Currently, I'm setting the RGB values pixel by pixel (see code below).I've come to realize this is incredibly slow and possibly just not efficient enough do in an application. Is there a better way I could do this? Here is what I am currently doing. You can see that the pixel array is enormous for an image that takes up a decent part of the screen
View 1 Replies View RelatedI want each pixel on the screen to flash between red, blue, green, white, and black but independently of each other. Is this possible? I have been searching everywhere with out any luck. Any help on where to start would be greatly appreciated.
View 1 Replies View RelatedI'm being confused by the 'screen density' concept in Android. I knwe that dpi (dot per inch) came from the printing device. 160 dpi means 160 dots in every inch on the paper. However, when dpi is used for the screen density, for example, what's mentioned '160 dpi screen' in Android document, what's the meaning? 160 pixels on every inch of the display?
As described in http://code.google.com/intl/zh-CN/android/reference/available-resourc..., 1 dip (density-independent pixel) means 1 pixel on a 160 dpi screen. Why does the ratio of dp-to-pixel not necessarily change with the screen density in direct proportion?
When the dpi is changed from 160 to 80, how many pixels will 1dp will take? 0.5?
I can hardly understand why dip/dp is introduced into Android.
I need to measure the light levels in a indoor sports club, as a wild stab in the dark does anyone know if there is an app out for this ?
View 6 Replies View RelatedI want to make a apps that check what's the nearest place from where the user is. I can easily get the location of the user and I have a list of places with latitude and longitude. What would be the best way to know the nearest place of the list against the current position. I could not find anything in the google APIs. I am worried I need to resort to my calculate and have to do math to calculate it.
View 2 Replies View RelatedI need in my Android Application the Distance and the Driving Time between Two cities.Is there a possibility to calculate this things for example via Google Navigator or Google Maps? (the driving distance, not the air-line distance)
View 2 Replies View RelatedI need to draw a circle on my map. I have the GeoPoint and I have the radius of the circle in meters. How do I add a distance to a GeoPoint and get a GeoPoint as a result?
View 3 Replies View RelatedI have used the algorithm on http://www.movable-type.co.uk/scripts/latlong.html to find the distance between two points.
My two points are
long1 = 51.507467;
lat1 = -0.08776;
long2 = 51.508736;
lat2 = -0.08612;
According to Movable Type Script the answer is 0.1812km
My application gives the result (d) as 0.230km code...
I'm trying to generate some points at random distances away from a fixed point using GPS.How can I add distance in meters to a GPS coordinate?I've looked at UTM to GPS conversion but is there a simpler method to achieve this?I'm working on Android platform just in case.
View 2 Replies View RelatedI have latitude and longitude of two places. Can i calculate the distance between them in android?
View 3 Replies View Relatedtotal nubi here and i'm trying to writ an application that trackes how far you have traveled. I can't find anything on how to do this. I can get location, speed, bearing etc.
View 2 Replies View RelatedI want to know that how can i calculate distance between two point using their latitude and longitude in android ?
View 4 Replies View RelatedI want to calculate the distance between 2 city, whatever user mention.
Example - Default City - 1st City - New York or New Delhi, London Seoul anything User Put - 2nd City - California
Need - to calculate distance between California to New York or London
I want to know the distance of two points or the width and height distance of my current mapview in km unit. Is there any android map api to do that?
View 1 Replies View RelatedCan it be determined that where a person is i.e is he walking ? is he in elevator ? or is he climbing up the stairs ? using android's accelerometer or is there any other way to calculate such in android ?
View 2 Replies View Related1) I have not been able to find out in which units Location.distance Between receives the latitude and longitude. Is it degrees or micro degrees? Whats the unit for the distance returned? 2) In windows XP using Eclipse 3.3.2. Emulator does not send coordinates properly. Either it by hand or by loading a gpx file the location Listener is not invoked. This same code I have tried it in Ubuntu and works fine. Does someone know how can I solve this? In the office there is no linux installed and I can take my personal laptop.
View 2 Replies View RelatedI am implementing an application to search for nearest local venues from a gps coordinates database.
I am using the Location class distanceTo() function to calculate distance between two location the current one and the one from the database.
CODE:............
This work fine and i am able to use this distance to calculate proximity in the rest of my app, but the distance it self is not apparently in meters i am getting result like 4134801.4 i am sure that the distance is 3200meters in this case.
Is there Android application that can be used to calculate travel time and distance?
View 2 Replies View RelatedI can easily find long/lat of my current location. Once I do that, I would like to find long/lat information for locations at distance X from y current location. Does anyone have suggestion(s) on how to do this using Android SDK methods?
View 12 Replies View RelatedI know there is an app for an iphone.. Is there something like that for the droid?
View 5 Replies View RelatedDoes anyone know of a DB reader avaiulable on the market? i downloaded "Digital dB Volume Meter" and even paid a dollar for it, but it onnly reads maximum of 80.7, no good when the law is around 93db. so does anyone know of a app for this, paid or free?
View 2 Replies View RelatedI want to keep track of my 3g data now on smaller bundle - is there a good one? ones ive seen in store so far dont seem very accurate for 3g data.
View 3 Replies View RelatedI am wondering if the Location.distanceTo method will use the accuracy field of the Location object when approximates the location, or do I have to add by my own the errors to these fields. The usage is to compare the distance against a proximity value.
Float dist=currentLocation.distanceTo(loc2); Would this be if (dist<100meters) or
if (dist+currentLocation.getAccuracy()+loc2.getAccuracy()<100meters)
Is there an app that makes the android a light meter?
View 1 Replies View RelatedI'm not even concerned with the camera per se. I want at the closest thing to the display screen. Meaning: it could even be the desktop the user is looking at, completw w/ the background and the icons she moves back and forth.
Let's say, at time t=1 sec, the app goes to pixel (78, 300) on that display and obtains its value. What may be at (78, 300) could be a portion of the icon or some speck of tree leaf on the photo being used as desktop background.
I'm familiar with BitmapFactory.decodeFile() for getting at the pixel contents of a file. But what about the display?
I am new to Android and OpenGL world. I've created a new ap using openGL ES. The package is attached with this mail. Android Simulator LCD size is 320 x 455 and i've set same size for OpenGL Viewport. But For creating visible rectangle i've to use vertices, which are of very high value.
E.g.
CODE:.....................
File file = new File(fileName);
Iterator iter = ImageIO.getImageReadersByFormatName("Reader");
ImageReader reader = (ImageReader) iter.next();
ImageReadParam param= reader.getDefaultReadParam();
ImageInputStream iis = ImageIO.createImageInputStream(myFile);
reader.setInput(iis, false);
BufferedImage myJpegImage = reader.read(0, param);
How can i write equivalent codes for above codes on Android? Are there any hints how to read pixel data?
I am looking at the source code of a Camera Preview application and learning that the preview buffers coming from the sensor is in YUV422 format. However, this preview frame is showed on the display in RGB. Can someone please let me know where the pixel format conversion happens? Is it inside Surface Flinger? If yes, can you please point me to the code?
View 5 Replies View RelatedI need to know how many pixels wide and tall the screen is. I know that there are a bunch of different localization folders that I could make for different views but I just need to know, programmatically, how many pixels are on the screen so I can do some drawing. How can I detect this?
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