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2014/10/16 ¤W¤È 08:10:59
android Programming Glossary: calculateDistance calculation from my location to destination location in android http://stackoverflow.com/questions/10683554/distance-calculation-from-my-location-to-destination-location-in-android in android I have to made a project where i need to calculate the distance from my location to destination location and show..
Current Month Facebook Friends Birthdays in Android http://stackoverflow.com/questions/14373862/current-month-facebook-friends-birthdays-in-android sdk share improve this question What you can do is calculate the following values using language you are using and use them..
How to check visibility of software keyboard in Android? http://stackoverflow.com/questions/2150078/how-to-check-visibility-of-software-keyboard-in-android into the ViewTreeObserver and from there calculate the size diff between your activity's view root and the window..
Is there a way to determine android physical screen height in cm or inches? http://stackoverflow.com/questions/2193457/is-there-a-way-to-determine-android-physical-screen-height-in-cm-or-inches screen is on the device in real units of length so I can calculate the acceleration due to gravity in pixels per millisecond. Is..
How to get Memory usage and CPU usage in android? http://stackoverflow.com/questions/3118234/how-to-get-memory-usage-and-cpu-usage-in-android share improve this question I use this function to calculate cpu usage. Hope it can help you. private float readUsage try..
How to get current memory usage in android? http://stackoverflow.com/questions/3170691/how-to-get-current-memory-usage-in-android is used to convert from bytes to megabytes P.S we need to calculate total memory only once. so call point 1 only once in your code..
Android: out of memory exception in Gallery http://stackoverflow.com/questions/3238388/android-out-of-memory-exception-in-gallery relevant. Since they're converted into bitmaps you need to calculate width height 4 bytes per image for regular ARGB images. width..
Android - SQlite Getting nearest locations (with latitude and longitude) http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude threshold and more accurate filter on data It is better to calculate 4 locations that are in radius meter of the north west east.. in database are in that rectangle or not. The method calculateDerivedPosition ... calculates those points for you p1 p2 p3.. rectangle or not. The method calculateDerivedPosition ... calculates those points for you p1 p2 p3 p4 in picture . Calculates the..
How to crop the parsed image in android? http://stackoverflow.com/questions/3725501/how-to-crop-the-parsed-image-in-android height bitmapOrg.height int newWidth 200 int newHeight 200 calculate the scale in this case 0.4f float scaleWidth float newWidth..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android to a destination location instead of north . a I have calculated north using the sensor values from the magnetometer and accelerometer... up with the compass used on the Google Map view. b I have calculated the initial bearing from my location to the destination location.. System.currentTimeMillis ... Armed with these you calculate the angle of the arrow to draw on your map to show where you..
http://stackoverflow.com/questions/4597690/android-timer-how or so Thanks. i want to make flying ball and need to calculate ball`s coordinates every second thats why i need some sort of..
Calculate text size according to width of text area http://stackoverflow.com/questions/4794484/calculate-text-size-according-to-width-of-text-area be set to TextView with specified width. It needs to calculate the text size to fit it into TextView. In other words Is there..
http://stackoverflow.com/questions/4951142/smooth-scrolling-in-android mScroller.getCurrY that is until animation is running calculate the point we reached and scroll there. As a last note remember..
how to calculate phone's movement in the vertical direction from rest? http://stackoverflow.com/questions/6291110/how-to-calculate-phones-movement-in-the-vertical-direction-from-rest to calculate phone's movement in the vertical direction from rest I am developing.. an app using android OS for which I need to know how can I calculate the movement of the device up in the vertical direction. For.. is a height change between point A and point B how would i calculate that I have already gone through the articles about sensors..
Modifying the Android seekbar widget to operate vertically http://stackoverflow.com/questions/631238/modifying-the-android-seekbar-widget-to-operate-vertically use the thumbOffset if I could figure it out. Since I can calculate the progress correctly I thought I would just use a linear function..
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 of phone accelerometers when used for positioning how to calculate phone's movement in the vertical direction from rest iOS Movement..
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show TYPE_ACCELEROMETER calibrating and using same formula to calculate speed i get good results much close to reality. So the question..
Android How to draw a smooth line following your finger http://stackoverflow.com/questions/8287949/android-how-to-draw-a-smooth-line-following-your-finger sharp edges. If you're really ambitious you can start to calculate the cubic splines as follows public void onDraw Canvas canvas.. drawing sessions this becomes computationally intensive to calculate. Hope that helps... fun stuff to play around with. Edit I threw..
Android Image View Pinch Zooming http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint..
Is Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra Matrix.setLookAtM mVMatrix 0 0 0 3 0f 0f 0f 0f 1.0f 0.0f Calculate the projection and view transformation Matrix.multiplyMM mMVPMatrix..
android CountDownTimer - additional milliseconds delay between ticks http://stackoverflow.com/questions/12762272/android-countdowntimer-additional-milliseconds-delay-between-ticks if millisLeft 0 onFinish else onTick millisLeft Calculate next tick by adding the countdown interval from the original..
Current Month Facebook Friends Birthdays in Android http://stackoverflow.com/questions/14373862/current-month-facebook-friends-birthdays-in-android who's birthday falls between 01 Jan and 31 Jan. Update Calculate current month and last date of current month Calendar cal Calendar.getInstance..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly options.outHeight int originalWidth options.outWidth Calculate your sampleSize based on the requiredWidth and originalWidth..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device true BitmapFactory.decodeResource res resId options Calculate inSampleSize options.inSampleSize calculateInSampleSize options.. int inSampleSize 1 if height reqHeight width reqWidth Calculate ratios of height and width to requested height and width final..
Android: Resize a large bitmap file to scaled output file http://stackoverflow.com/questions/3331527/android-resize-a-large-bitmap-file-to-scaled-output-file as a compromise. Here are the steps for anyone browsing Calculate the maximum possible inSampleSize that still yields an image..
Android: compass + distance in a listview http://stackoverflow.com/questions/3833654/android-compass-distance-in-a-listview Location poiLocation item.getLocation int compassHeading Calculate heading relative to current heading float distance Calculate.. heading relative to current heading float distance Calculate distance to POI if convertView null myView new LinearLayout..
Trying to get the display size of an image in an ImageView http://stackoverflow.com/questions/3855218/trying-to-get-the-display-size-of-an-image-in-an-imageview d.getIntrinsicWidth final int origH d.getIntrinsicHeight Calculate the actual dimensions final int actW Math.round origW scaleX..
Quality problems when resizing an image at runtime http://stackoverflow.com/questions/4231817/quality-problems-when-resizing-an-image-at-runtime width. if desiredWidth srcWidth desiredWidth srcWidth Calculate the correct inSampleSize scale value. This helps reduce memory..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android compass bearing heading to location in Android I want to display..
Grid of images inside ScrollView http://stackoverflow.com/questions/4523609/grid-of-images-inside-scrollview heightMeasureSpec HACK TAKE THAT ANDROID if isExpanded Calculate entire height by providing a very large height hint. View.MEASURED_SIZE_MASK..
Calculate text size according to width of text area http://stackoverflow.com/questions/4794484/calculate-text-size-according-to-width-of-text-area text size according to width of text area I have a text that..
zooming and dragging images using matrix in android http://stackoverflow.com/questions/5881778/zooming-and-dragging-images-using-matrix-in-android y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint..
Rotate zoom drag image in android imageview http://stackoverflow.com/questions/5894736/rotate-zoom-drag-image-in-android-imageview y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint..
How to enable the (two finger) zoom in/out feature for an image in android [duplicate] http://stackoverflow.com/questions/7582833/how-to-enable-the-two-finger-zoom-in-out-feature-for-an-image-in-android y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint..
http://stackoverflow.com/questions/8481844/gridview-height-gets-cut heightMeasureSpec HACK TAKE THAT ANDROID if isExpanded Calculate entire height by providing a very large height hint. View.MEASURED_SIZE_MASK..
Distance calculation from my location to destination location in android http://stackoverflow.com/questions/10683554/distance-calculation-from-my-location-to-destination-location-in-android calculation from my location to destination location in android I have to made a project where i need to calculate the distance from my location to destination location and show it in a textview.Here note that this distance updated when..
Current Month Facebook Friends Birthdays in Android http://stackoverflow.com/questions/14373862/current-month-facebook-friends-birthdays-in-android facebook facebook graph api facebook fql facebook android sdk share improve this question What you can do is calculate the following values using language you are using and use them in your FQL 1st's day of the current month 17 Today's month..
How to check visibility of software keyboard in Android? http://stackoverflow.com/questions/2150078/how-to-check-visibility-of-software-keyboard-in-android root view a known ID say '@ id activityRoot' hook a GlobalLayoutListener into the ViewTreeObserver and from there calculate the size diff between your activity's view root and the window size final View activityRootView findViewById R.id.activityRoot..
Is there a way to determine android physical screen height in cm or inches? http://stackoverflow.com/questions/2193457/is-there-a-way-to-determine-android-physical-screen-height-in-cm-or-inches height in cm or inches I need to know exactly how big the screen is on the device in real units of length so I can calculate the acceleration due to gravity in pixels per millisecond. Is there a method somewhere in the Android API for this android..
How to get Memory usage and CPU usage in android? http://stackoverflow.com/questions/3118234/how-to-get-memory-usage-and-cpu-usage-in-android I will be very thankful for your anykind of help. android share improve this question I use this function to calculate cpu usage. Hope it can help you. private float readUsage try RandomAccessFile reader new RandomAccessFile proc stat r String..
How to get current memory usage in android? http://stackoverflow.com/questions/3170691/how-to-get-current-memory-usage-in-android 1024 1024 1048576 It's quite obvious that the number is used to convert from bytes to megabytes P.S we need to calculate total memory only once. so call point 1 only once in your code and then after you can call code of point 2 repetitively...
Android: out of memory exception in Gallery http://stackoverflow.com/questions/3238388/android-out-of-memory-exception-in-gallery of the image you're loading from the web isn't directly relevant. Since they're converted into bitmaps you need to calculate width height 4 bytes per image for regular ARGB images. width and height in px . The bitmaps consume native heap which usually..
Android - SQlite Getting nearest locations (with latitude and longitude) http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude procedure for this purpose To have a deterministic threshold and more accurate filter on data It is better to calculate 4 locations that are in radius meter of the north west east and south of your central point in your java code and then check.. than and more than sqlite operators to determine if your points in database are in that rectangle or not. The method calculateDerivedPosition ... calculates those points for you p1 p2 p3 p4 in picture . Calculates the end point from a given source.. to determine if your points in database are in that rectangle or not. The method calculateDerivedPosition ... 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..
How to crop the parsed image in android? http://stackoverflow.com/questions/3725501/how-to-crop-the-parsed-image-in-android R.drawable.android int width bitmapOrg.width int height bitmapOrg.height int newWidth 200 int newHeight 200 calculate the scale in this case 0.4f float scaleWidth float newWidth width float scaleHeight float newHeight height createa matrix..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android on a google map view that displays my direction relative to a destination location instead of north . a I have calculated north using the sensor values from the magnetometer and accelerometer. I know this is correct because it lines up with.. and accelerometer. I know this is correct because it lines up with the compass used on the Google Map view. b I have calculated the initial bearing from my location to the destination location by using myLocation.bearingTo destLocation I'm missing.. .floatValue Double.valueOf location.getAltitude .floatValue System.currentTimeMillis ... Armed with these you calculate the angle of the arrow to draw on your map to show where you are facing in relation to your destination object rather than..
http://stackoverflow.com/questions/4597690/android-timer-how someone get a simple example of updating textfield every second or so Thanks. i want to make flying ball and need to calculate ball`s coordinates every second thats why i need some sort of timer i dont get anything from here http android developers.blogspot.com..
Calculate text size according to width of text area http://stackoverflow.com/questions/4794484/calculate-text-size-according-to-width-of-text-area size according to width of text area I have a text that should be set to TextView with specified width. It needs to calculate the text size to fit it into TextView. In other words Is there a way to fit text into TextView area like the ImageView scale..
http://stackoverflow.com/questions/4951142/smooth-scrolling-in-android if mScroller.computeScrollOffset scrollTo mScroller.getCurrX mScroller.getCurrY that is until animation is running calculate the point we reached and scroll there. As a last note remember to return true in your OnGestureListener.onDown even if you..
how to calculate phone's movement in the vertical direction from rest? http://stackoverflow.com/questions/6291110/how-to-calculate-phones-movement-in-the-vertical-direction-from-rest to calculate phone's movement in the vertical direction from rest I am developing an app using android OS for which I need to know how.. in the vertical direction from rest I am developing an app using android OS for which I need to know how can I calculate the movement of the device up in the vertical direction. For example the device is at rest point A the user picks it up.. point A the user picks it up in his hand point B now there is a height change between point A and point B how would i calculate that I have already gone through the articles about sensors and accelerometers but I couldn't really find anything to help..
Modifying the Android seekbar widget to operate vertically http://stackoverflow.com/questions/631238/modifying-the-android-seekbar-widget-to-operate-vertically I am pretty sure I'm not doing right. Or maybe I could just use the thumbOffset if I could figure it out. Since I can calculate the progress correctly I thought I would just use a linear function of progress getTop getBottom of the widget but that..
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
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show three times less than real speed. Changing Sensor type to TYPE_ACCELEROMETER calibrating and using same formula to calculate speed i get good results much close to reality. So the question is what Sensor.TYPE_LINEAR_ACCELERATION really shows Where..
Android How to draw a smooth line following your finger http://stackoverflow.com/questions/8287949/android-how-to-draw-a-smooth-line-following-your-finger canvas.drawPath path paint This still results in some sharp edges. If you're really ambitious you can start to calculate the cubic splines as follows public void onDraw Canvas canvas Path path new Path if points.size 1 for int i points.size.. has to connect the dots using a loop. Also for long drawing sessions this becomes computationally intensive to calculate. Hope that helps... fun stuff to play around with. Edit I threw together a quick project demonstrating these different techniques..
Android Image View Pinch Zooming http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming MotionEvent event float x event.getX 0 event.getX 1 float y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint PointF point MotionEvent event float x event.getX 0 event.getX..
Is Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra mVMatrix. So far so good. Set the camera position View matrix Matrix.setLookAtM mVMatrix 0 0 0 3 0f 0f 0f 0f 1.0f 0.0f Calculate the projection and view transformation Matrix.multiplyMM mMVPMatrix 0 mProjMatrix 0 mVMatrix 0 Next they are appending a..
android CountDownTimer - additional milliseconds delay between ticks http://stackoverflow.com/questions/12762272/android-countdowntimer-additional-milliseconds-delay-between-ticks final long millisLeft mStopTimeInFuture SystemClock.uptimeMillis if millisLeft 0 onFinish else onTick millisLeft Calculate next tick by adding the countdown interval from the original start time If user's onTick took too long skip the intervals..
Current Month Facebook Friends Birthdays in Android http://stackoverflow.com/questions/14373862/current-month-facebook-friends-birthdays-in-android 5 '31' ORDER BY birthday_date This will then return the friends who's birthday falls between 01 Jan and 31 Jan. Update Calculate current month and last date of current month Calendar cal Calendar.getInstance int currentmonth cal.get Calendar.MONTH 1..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly file.getAbsolutePath options int originalHeight options.outHeight int originalWidth options.outWidth Calculate your sampleSize based on the requiredWidth and originalWidth For e.g you want the width to stay consistent at 500dp int..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeResource res resId options Calculate inSampleSize options.inSampleSize calculateInSampleSize options reqWidth reqHeight Decode bitmap with inSampleSize set options.inJustDecodeBounds.. int height options.outHeight final int width options.outWidth int inSampleSize 1 if height reqHeight width reqWidth Calculate ratios of height and width to requested height and width final int heightRatio Math.round float height float reqHeight final..
Android: Resize a large bitmap file to scaled output file http://stackoverflow.com/questions/3331527/android-resize-a-large-bitmap-file-to-scaled-output-file correct me but I accepted the load resize approach you tried as a compromise. Here are the steps for anyone browsing Calculate the maximum possible inSampleSize that still yields an image larger than your target. Load the image using BitmapFactory.decodeFile..
Android: compass + distance in a listview http://stackoverflow.com/questions/3833654/android-compass-distance-in-a-listview parent LinearLayout myView MyPOI item getItem position Location poiLocation item.getLocation int compassHeading Calculate heading relative to current heading float distance Calculate distance to POI if convertView null myView new LinearLayout.. Location poiLocation item.getLocation int compassHeading Calculate heading relative to current heading float distance Calculate distance to POI if convertView null myView new LinearLayout getContext String inflater Context.LAYOUT_INFLATER_SERVICE LayoutInflater..
Trying to get the display size of an image in an ImageView http://stackoverflow.com/questions/3855218/trying-to-get-the-display-size-of-an-image-in-an-imageview getHeight final Drawable d getDrawable final int origW d.getIntrinsicWidth final int origH d.getIntrinsicHeight Calculate the actual dimensions final int actW Math.round origW scaleX final int actH Math.round origH scaleY Log.e DBG origW origH..
Quality problems when resizing an image at runtime http://stackoverflow.com/questions/4231817/quality-problems-when-resizing-an-image-at-runtime enough. This code is just trying to fit a image into a certain width. if desiredWidth srcWidth desiredWidth srcWidth Calculate the correct inSampleSize scale value. This helps reduce memory use. It should be a power of 2 from http stackoverflow.com..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android compass bearing heading to location in Android I want to display an arrow at my location on a google map view that displays..
Grid of images inside ScrollView http://stackoverflow.com/questions/4523609/grid-of-images-inside-scrollview @Override public void onMeasure int widthMeasureSpec int heightMeasureSpec HACK TAKE THAT ANDROID if isExpanded Calculate entire height by providing a very large height hint. View.MEASURED_SIZE_MASK represents the largest height possible. int..
Calculate text size according to width of text area http://stackoverflow.com/questions/4794484/calculate-text-size-according-to-width-of-text-area text size according to width of text area I have a text that should be set to TextView with specified width. It needs to..
zooming and dragging images using matrix in android http://stackoverflow.com/questions/5881778/zooming-and-dragging-images-using-matrix-in-android MotionEvent event float x event.getX 0 event.getX 1 float y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint PointF point MotionEvent event float x event.getX 0 event.getX..
Rotate zoom drag image in android imageview http://stackoverflow.com/questions/5894736/rotate-zoom-drag-image-in-android-imageview MotionEvent event float x event.getX 0 event.getX 1 float y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint PointF point MotionEvent event float x event.getX 0 event.getX..
How to enable the (two finger) zoom in/out feature for an image in android [duplicate] http://stackoverflow.com/questions/7582833/how-to-enable-the-two-finger-zoom-in-out-feature-for-an-image-in-android MotionEvent event float x event.getX 0 event.getX 1 float y event.getY 0 event.getY 1 return FloatMath.sqrt x x y y Calculate the mid point of the first two fingers private void midPoint PointF point MotionEvent event float x event.getX 0 event.getX..
http://stackoverflow.com/questions/8481844/gridview-height-gets-cut @Override public void onMeasure int widthMeasureSpec int heightMeasureSpec HACK TAKE THAT ANDROID if isExpanded Calculate entire height by providing a very large height hint. View.MEASURED_SIZE_MASK represents the largest height possible. int..
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