Android :: Camera Application With Compass Direction Overlay?

Jul 12, 2010

I'm a bit new to Android but after searching on the Market, the web and this forum, I can't seem to find anything like this but I feel like it has to exist (or hopefully will soon). I'm looking for a camera application that can place the current compass direction on the image (and stamp the saved image with the direction). The tilt of the phone would be cool to have, too, but just the compass would be great. I did find an application that shows the compass direction on over top of a feed from the camera ("Reality + Compass" by Udell Enterprises).

I want something just like this, but with the ability to save the image. In case you're wondering, I'd like to use this for bettering the storm spotting community. A problem when people send in images of clouds/storms/tornadoes/etc is that you never know (1) where the picture was taken and (2) in what direction. Ideally GPS location could be added, too, but for now I just want the compass. (Other image services can handle the location part fine, like Twitter for Android/Twitpic.)

(I'm on the HTC Aria, but I can sideload apps now thanks to the new version of HTC Sync.)


Android :: Finding Direction Using Compass Interface

Jan 11, 2010

I need to know if there is an interface to access the direction in which the phone is pointing.

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Android :: Compass Pointing Direction Other Than North

Sep 16, 2010

I'm trying to implement something that I don't even know if it's possible. So I have this class which implements a SensorEventListener like this:
private SensorEventListener mySensorEventListener = new SensorEventListener(){
@Override public void onAccuracyChanged(Sensor sensor, int accuracy) {
} @Override public void onSensorChanged(SensorEvent event) {
myCompass.updateDirection((float)event.values[0]); } };

And a class that handles the way the compass looks like this:
public static class compassLook extends View {
private Paint paintPointer = new Paint(Paint.ANTI_ALIAS_FLAG);
private Paint paintCircle = new Paint(Paint.ANTI_ALIAS_FLAG);
private Paint paintLeters = new Paint(Paint.ANTI_ALIAS_FLAG);
private boolean firstDraw; private float direction = 0 ;
public compassLook(Context context) { super(context); init();
} public compassLook(Context context, AttributeSet attrs) { super(context, attrs); init();
} public compassLook(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle); init(); } private void init(){
paintPointer.setStyle(Paint.Style.STROKE); paintPointer.setStrokeWidth(3);
paintPointer.setColor(Color.argb(255, 209, 114, 2)); paintCircle.setStyle(Paint.Style.STROKE);
paintCircle.setStrokeWidth(2); paintCircle.setColor(Color.argb(150, 255, 255, 255));
paintLeters.setStyle(Paint.Style.STROKE); paintLeters.setStrokeWidth(1);
paintLeters.setColor(Color.argb(230, 255, 255, 255)); paintLeters.setTextSize(12);
firstDraw = true; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec),
MeasureSpec.getSize(heightMeasureSpec)); } @Override protected void onDraw(Canvas canvas) {
int cxCompass = (getMeasuredWidth()/2); int cyCompass = (getMeasuredHeight()/2);
float radiusCompass; if(cxCompass > cyCompass){ radiusCompass = (float) (cyCompass * 0.9);
} else{ radiusCompass = (float) (cxCompass * 0.9);}
canvas.drawCircle(cxCompass-50, cyCompass, radiusCompass, paintCircle);
if(!firstDraw){ // Desenho da linha que aponta canvas.drawLine(cxCompass-50, cyCompass,
(float)(cxCompass-50 + radiusCompass * Math.sin((double)(- direction) * 3.14/180)),
(float)(cyCompass - radiusCompass * Math.cos((double)(-direction) * 3.14/180)),
paintPointer); double mLatitude = (mLocation.getLatitude() / 1E6);
// I get this value from a LM request double mLongitude = (mLocation.getLongitude() / 1E6);
// I get this value from a LM request double picLatitude= Double.parseDouble(picLatitudeString);
// I get this value from a bundle double picLongitude = Double.parseDouble(picLongitudeString);
// I get this value from a bundle float direction = (float)
Math.toDegrees(Math.atan2(picLongitude- mLongitude, picLatitude-mLatitude));
float distancia = (float) (Math.sqrt(Math.pow(mLatitude- picLatitude,
2) + Math.pow(mLongitude-picLongitude,2)))/2;
//Desenho do texto que indica a distancia
canvas.drawText(String.valueOf(distancia) + "Km", cxCompass-30,
cyCompass+20, paintLeters); } } public void updateDirection(float dir)
{ firstDraw = false; direction = dir; invalidate(); } }

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Android :: Getting Compass Values And Use It On Map Overlay

Sep 13, 2010

I have a marker on the map using an Overlay. I also have access to the compass sensor which I'm able to show a textView with the orientation values (0 to 359). How can I apply this values to the marker? (which is a drawable). I already have a MAtrix created but when I insert the orientation value gives me an error, here it is:

GeoPoint geopoint = new GeoPoint((int) (newLocation.getLatitude() * 1E6),
(int) (newLocation.getLongitude() * 1E6)); Paint paint = new Paint();
Point pt = new Point(); mapView.getProjection().toPixels(geopoint, pt);
Bitmap bmp = BitmapFactory.decodeResource(getResources(),R.drawable.user2);
Matrix matrix = new Matrix(); matrix.postTranslate(-25, -25);
matrix.postRotate(direction); matrix.postTranslate(pt.x, pt.y);
paint.setAntiAlias(true); paint.setFilterBitmap(true);
int width = bmp.getWidth(); int height = bmp.getHeight();
Bitmap changedBitmap = Bitmap.createBitmap(bmp, 0, 0, width, height, matrix, true);
BitmapDrawable icon = new BitmapDrawable(changedBitmap);
icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon.getIntrinsicHeight());
userOverlay useroverlay = new userOverlay(icon); useroverlay.addItem(item);

I used the value retrieved from the sensor on "direction" but it doesn't work.

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Android :: How Can I Replace Compass Image Of Location Overlay?

Aug 24, 2010

I want to use my image to replace the Compass image of MyLocationOverlay, how can i implement?

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Android :: My Location Overlay - Customizing Compass Position On Screen?

Nov 3, 2010

I am using these three lines to add a compass on the MapView: mMyLocationOverlay = new MyLocationOverlay (this,mapView);mMyLocationOverlay. enableCompass(); mapView.getOverlays() .add(mMyLocation Overlay) ; However the default position of the compass showing on the screen is not too good for my apps, and I want to move it to somewhere else. Anyone knows how I can achieve that?

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How To Get Camera Direction Of GPS Enabled Phone

Nov 21, 2011

How to get Camera direction of GPS enabled phone?

All i found about GPS is that it just tells the location of the device, how do one get the direction where camera is pointing with GPS enabled phone?

For example, I need to see the camera api and work out which direction the camera is pointing. So that I can see the direction I'm viewing. In the other word, it is work like a compass.

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Android :: AR Get Rotation Matrix / Camera Overlay?

Feb 23, 2010

I spend two weeks now trying to get this working with no success. Here is what I want to do: I have several geo points around the user and his phone. I want to display this point overlaying them on the input from the camera (kind of standard AR (Augmented Reality) app). Part of my requirements are that the user can use the phone in either landscape or portrait mode.My plan was like this.
1. Register for Sensor.TYPE_ACCELEROMETER, Sensor.TYPE_MAGNETIC_FIELD 2. Pass the result to Sensor Manager.getRotationMatrix(), getting back the R matrix that should be telling me how to translate points from the Phone coordinate system (defined here: to World coordinate system (x -> East, y -> North, z -> Sky) 3. I want to translate points from World to Phone so I take the inverse of R (I'm using Matrix.invertM()) to get R_In 4. Using the GPS I translate the geo points I want to display on the camera to points in the World coordinate system and then I run them through the R_In matrix to get their coordinates in the Phone system. 5. Draw the points in the screen only if the have (phone coordinates) z < 0 and x and y such that they are visible. This is my grand plan... however I have problems quite early (2). I do get the R matrix back and it looks good when I align the phone to the world coordinate system ( I get the identity matrix ). However when I try to translate an imaginary point from the Phone coordinate system say (0, 1, 0) to the World coordinate system I don't get the numbers I expect.

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Android :: How To Overlay Image Over Camera Preview?

Jan 30, 2009

Does someone know how I can overlay an image over the camera preview?

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Android :: Overlay Transparent Bitmap On Camera

Aug 10, 2010

I'm passing a bitmap through a bundle to an activity which I called cameraView on which the user has access to the camera of the device. I'd like to overlay that bitmap with transparency using the camera as the background. Is it possible? to put the bitmap in front of the camera? And how can I change the transparency level? Here is my code: This is the camview.xml:

<RelativeLayout xmlns:android=""
android:layout_width="fill_parent" android:layout_height="fill_parent"
<SurfaceView android:id="@+id/surface_camera" android:layout_width="fill_parent"
android:layout_height="10dip" android:layout_weight="1"> </SurfaceView> </RelativeLayout>

And this is the java:
public class cameraView extends Activity implements SurfaceHolder.Callback{
SurfaceView mSurfaceView; SurfaceHolder mSurfaceHolder;
Camera mCamera; boolean mPreviewRunning=false; private Context mContext = this;
public void onCreate(Bundle icicle) { super.onCreate(icicle);
setContentView(R.layout.camview); Bundle f = getIntent().getExtras();
picture = f.getParcelable("bitmap"); mSurfaceView = (SurfaceView) findViewById(; mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
} @Override // Create the Surface and Open the Camera
public void surfaceCreated(SurfaceHolder holder) { mCamera =;
} @Override // Reacts for camera changes public void surfaceChanged(SurfaceHolder holder,
int format, int w,int h) { if (mPreviewRunning) { mCamera.stopPreview();
} Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(w, h);
mCamera.setParameters(p); try { mCamera.setPreviewDisplay(holder);
} catch (IOException e) { e.printStackTrace();
} mCamera.startPreview(); mPreviewRunning = true;
} @Override // When the camera is closed
public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview();
mPreviewRunning = false; mCamera.release(); }
// When the picure is taken. This method gives the byte[] of the picture
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] imageData, Camera c) {
} };

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Android :: Camera Preview Layout UI Elements Overlay?

Dec 27, 2009

How do I write code which layouts UI elements (Buttons, etc) over camera preview on Android ?

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Android :: How To Draw Overlay On Surface View Used By Camera?

May 29, 2010

I have a simple program that draws the preview of the Camera into a SurfaceView. What I'm trying to do is using the onPreviewFrame method, which is invoked each time a new frame is drawn into the SurfaceView, in order to execute the invalidate method which is supposed to invoke the onDraw method. In fact, the onDraw method is being invoked, but nothing there is being printed (I guess the camera preview is overwriting the text I'm trying to draw).

This is a simplify version of the SurfaceView subclass I have:

public class Superficie extends SurfaceView implements SurfaceHolder.Callback {
SurfaceHolder mHolder; public Camera camera; Superficie(Context context) { super(context);
mHolder = getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
} public void surfaceCreated(final SurfaceHolder holder) { camera =;
try { camera.setPreviewDisplay(holder); camera.setPreviewCallback(new PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera arg1) { invalidar();
} } ); } catch (IOException e) {} } public void invalidar(){ invalidate(); }
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Camera.Parameters parameters = camera.getParameters(); parameters.setPreviewSize(w, h);
camera.setParameters(parameters); camera.startPreview(); }
@Override public void draw(Canvas canvas) { super.draw(canvas);
// nothing gets drawn :( Paint p = new Paint(Color.RED);
canvas.drawText("PREVIEW", canvas.getWidth() / 2, canvas.getHeight() / 2, p);
} }

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Android :: Overlay Images Onto Camera Preview Surface View

Aug 23, 2010

I have a SurfaceView that is being used to draw custom animations and I would like to overlay them onto a live-feed from the phone's camera. Currently, the SurfaceView that contains the animations has a white- background, but if I were to overlay them onto the phone's camera feed, they would have to be transparent. The camera and animation drawing cannot be done on the same SurfaceView. Is it possible to make a SurfaceView transparent? What is the best course to pursue the use of multiple views? My end goal is to essentially overlay the contents of another SurfaceView onto the Camera SurfaceView.

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Android : Driving Direction Info From Maps Application

Mar 31, 2009

After launching Android maps application from other application, how to get driving direction info from maps application? e.g. distance, estimated driving time, etc.

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Android :: Surface View Draw Images Overlay On Camera Preview

Aug 23, 2010

I have a SurfaceView that is being used to draw images, and I would like to overlay them onto a live-feed from the phone's camera. Currently, the SurfaceView that contains the images have a white-background, but if I were to overlay them onto the phone's camera feed, they would have to be transparent. The camera and animation drawing cannot be done on the same SurfaceView. What is the best course to pursue the use of multiple views that involve managing the camera and drawing images? Is it possible to make a SurfaceView transparent?

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Android :: Implement The Compass Function To Application

Jun 5, 2009

How can I implement the Compass function having 2 geopoints (start and destination)?

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Android :: Not Accurate - Build Compass For My Application

May 4, 2010

I need to build compass for my application.

From reading the documentation it seems there are two reasonable ways of doing this:

Sensor.TYPE_ORIENTATION method: This is the easy way of doing it. The problem with this is it is not accurate. When I compare my reading with Snaptic Compass it is about 10-15 degress off which for my purposes is unacceptable.

Sensor.TYPE_ACCELEROMETER, Sensor.TYPE_MAGNETIC_FIELD and getRotationMatrix() in conjunction with remapCoordinateSystem() and getOrientation() method: The documentation says this "is usually more accurate". The problem is regardless of the delay I register with listener the compass goes crazy even when the device is stationary on flat surface.

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HTC Hero :: Camera Not Working - Message The Application Camera Process Has Stopped Unexpectedly Please Try Again

Dec 6, 2009

My camera stopped working. When I click my camera application I get the message "The application camera (process has stopped unexpectedly. Please try again". It's just a blank screen?

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Android :: Application For Compass For HTC Hero - Similar To One On IPhone

Nov 11, 2009

I was just curious as to whether theres an application for a compass for the HTC Hero, similar to the one on the iPhone?

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Android :: Map Open Overlay When Pin Is Clicked - Overlay Contains Description / Button

Aug 18, 2010

I like tu use the MapActivity to display some pins. When a pin is pressed i like to open a description. This can I obtain following the tutorial: /resources /tutorials/views/hello-mapview. But now I like to put a button on the overlay window. That button should open a detail activity. How can I make this? How is possible to personalize the overlay "info window"?

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Samsung Moment :: Need A Compass Application

Nov 27, 2009

I just tried a bunch of compass applications, and they all seem to be off by about 45 to 90 degrees. It's the same on goggle sky. Does anyone else have this same problem?

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HTC EVO 4G :: Compass Application Wildly Inaccurate

Jun 10, 2010

I tried using Layar 3 different times in 3 different locations, and each time it showed the locations of things to be completely opposite of where they were supposed to be. So I installed a Compass app and (at least in this room) it seems to be about 90* off. Can anyone else mess around with Layar / Compass app and report their findings?

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Samsung Moment :: Downloaded Compass Application

Nov 8, 2009

Downloaded compass application and didn't find it to be very accurate. Used it next to a real compass and an Iphone with its compass....Iphone matched the real compass...this one was way off. Anyone have better luck, or did they get the compass chip from the same guy they got the crappy GPS chip from.

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Android : How I Can Get Direction In Htc Desire

Nov 28, 2010

Every one can any body explain to me how I can get direction in Htc desire ,cause when I ask about any direction or end point always the answer is no route.

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Android :: Any Application To Disable Camera

Dec 30, 2008

Does anyone know of any apps that can disable the camera? My work does not allow camera phones.

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Android :: How To Call Camera From Own Application?

Jun 23, 2009

I want to call camera application from my own application, take video. Then I want to get the video back and return to my application. How Can I do it?

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Android :: Camera Application Not Working

Mar 13, 2009

How to make camera work for the android file system. When am I clicking camera application button, only square blocks are coming in the LCD screen.

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Android :: Camera Application 1.5 On Emulator Do Nothing

May 22, 2009

Strange behaviour with emulator running with Cupcake. When emulator is launched (via ADT), a SD card is mounted correctly, and I click on Camera, I have a black screen and nothing happens, I got the famous error with Wait or Force close wait, wait, wait nothing happens. I create with AVD the target 3. I'm on Windows XP SP2.

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Android :: How To Activate Camera From My Application?

Aug 19, 2009

How do I pass an Intent from my application to the Camera application to bring it to the foreground?

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Android :: How To Use Camera Application Without SD Card?

Feb 5, 2009

When I was using the camera application, the ERROR: Please insert SD card before using camera jumped out because the driver of sd card haven't been porting properly. Is there anyway to use android camera application without sd card?

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Android :: Using Camera To Take Pictures From My Application

Jan 7, 2010

I've been trying to write an application that uses the Camera App to take a picture. So far, the only thing I've been able to get back successfully is a tiny bitmap picture. I've found several other posts related to this topic that have code that is reported to work, but it does not work for me. I'm hoping someone can steer me in the right direction. Below is the code I am using currently, but it causes the application to blow up.

private void takePicture(final int x, final int y, String description) {
// create a file on the SD card
File file = new File(Environment.getExternalStorageDirectory(),
"tmp_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
// Create the URI that tells the camera where to put the picture.
mOutputFileUri = Uri.fromFile(file);
statusLine.setText("URI => " + mOutputFileUri);
mIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE)
.putExtra(MediaStore.EXTRA_OUTPUT, mOutputFileUri)
.putExtra(PIC_X, x) // x coordinate of square
.putExtra(PIC_Y, y) // y coordinate of square
.putExtra("return-data", true) ;
startActivityForResult(mIntent, PIC_FROM_CAMERA);

Ultimately, I want to be able to get the picture back and do two things with it: create a 64x64 icon that is displayed by the Android application, and upload the picture to a web application. I'm running this on the emulator using Android 2.0

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Android :: Compile Camera Application For SDK 1.6

Aug 18, 2010

I am trying to compile and run the Android Camera for sdk 1.6 (also called API level 4 or Donut release). While there is no minSdkVersion in the AndroidManifest, it clearly does not run on a donut device. In fact, if compiled with sdk 2.2 the camera will crash with a NoSuchMethodError execption on an avd or a G1 with sdk 1.6. I tried also checking out the [donut-release] tag, but, strangely, it won't even compile giving many errors like:

[javac] /home/mrucci/camtest2/src/com/android/camera/ cannot find symbol
[javac] symbol : class DrmStore
[javac] location: package android.provider
[javac] import android.provider.DrmStore;
[javac] ^
[javac] /home/mrucci/camtest2/src/com/android/camera/ cannot find symbol
[javac] symbol : class MediaMetadataRetriever
[javac] location: package
[javac] import;
[javac] ^
[javac] /home/mrucci/camtest2/src/com/android/camera/ cannot find symbol
[javac] symbol : class ExifInterface
[javac] location: package
[javac] import;
[javac] ^
[javac] /home/mrucci/camtest2/src/com/android/camera/ cannot find symbol
[javac] symbol : variable mScrollX
[javac] location: class
[javac] mScrollX + mRight - mLeft),
[javac] ^
[javac] /home/mrucci/camtest2/src/com/android/camera/ cannot find symbol
[javac] symbol : variable mRight
[javac] location: class
[javac] mScrollX + mRight - mLeft),

In particular, I really do not understand why ExifInterface is used in the "donut" tag when it has been introduced since API level 5.

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Android :: Camera Zoom FX Application?

Oct 19, 2009

I've been using FXCamera for a few weeks now it takes great pictures on my phone, with cool effects like fisheye and the warholizer. FxCamera. Just noticed that android slide has released a version of their Camera ZOOM FX application which has 40 photo FX, geotagging and obviously zoom which I can't do at the moment in FXCamera. Camera ZOOM FX. Just wondering if anyone had a chance to look at either of these apps and which they think is best, because I've been hoping for some new effects for a while and the android slide app sounds worth a look.

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Android :: Accelerometer Direction Of Shake?

Apr 8, 2010

I've been playing with the data given by the accelerometer,trying to work out how I can gauge a shake from front to back or side to side. This all seems straightforward enough.But I'd love to know the direction of the shake. So, if the user is shaking backwards and forwards, I want to know if the device is moving away from the user, or back towards him/her. I can't find any way of telling this.

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Android :: Direction Information In MapView

Aug 16, 2010

I want to show the direction information in my app.Direction from one address to the another using Google maps and also wanted to set overlays at the starting address and the destination address.Is there any classes in android too do that.

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Android :: Draw The Direction Arrow On The Map

Sep 13, 2010

I am creating a class extending mylocationoverlay. then, i override the draw method. is this the correct method? because after i rewrote the draw method, the map tile cannot render.

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Android :: Scrolling The Wrong Direction?

Dec 7, 2009

Scrolling on an Android phone makes sense because it's like you're physically sliding the page upwards. However, now that I'm used to doing that, when I get on my laptop and start to scroll with my touchpad, sometimes I find myself scrolling the wrong direction. On a touchpad you drag downwards to go down on the page, or to slide the page upwards. So it's backwards from the motion you would make on your phone.

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Android :: Calculating Direction From Point A To B

Sep 17, 2010

I'm trying to create a compass for my application BUT the difference is that, instead of having a line always pointing to north, I want this line to point for a specific point. I've been trying dozens of algorithms and nothing works. I've finally found one that points me exactlly to the point I want. But it doesn't move if I change the position of the device which is my objective. Basically, what I want is that no matter the direction I'm using my device. The line always point me to the point (picLatitude,picLongitude). I understood that for the line to move, I can't use static variables. I need to use the values offered by the onSensorChanged(SensorEvent event). This are the data I have available:

event.values[0]: azimuth, rotation around the Z axis (device in relation to north, 0) event.values[1]: pitch, rotation around the X axis event.values[2]: roll, rotation around the Y axis mLatitude: device current latitude got from GPS (variable) mLongitude: device current longitude got from GPS (variable) picLatitude: static picture latitude established previously picLongitude: static picture longitude established previously distance: distance in Km from device to the picture calculated previously

And this the formula that works correct, and gives me the correct angle. (But it doesn't use any of the Sensor Data so the line Compass doesn't move):
double dLong = picLongitude - mLongitude; double y = (Math.sin(dLong) *
Math.cos(picLatitude)); double x = (Math.cos(mLatitude) * Math.sin(picLatitude) - Math.sin(mLatitude)*Math.cos(picLatitude)*Math.cos(dLong)); double angleDegreesWrongRange = Math.abs(Math.toDegrees(Math.atan2(y, x))); float angleDegrees = (float) ((angleDegreesWrongRange+360) % 360);
I got this "bearing" formula from this website: I've try adding, subtracting, the azimuth.. I've tried with the others, seriously at this point I'm just demoralized.

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Android :: Scrolling Direction And Velocity

Jul 8, 2010

Is there an easy to know the direction of scroll (up or down for a vertical list) and the scroll velocity for ListView's?

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Android :: Way To Get Direction Between Two Locations In Droid?

Aug 2, 2010

Is there any way to find the direction between two locations in Android?

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