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2014/10/16 ¤W¤È 08:18:40
android Programming Glossary: math.roundBitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled imageWidth reqWidth if imageWidth imageHeight inSampleSize Math.round float imageHeight float reqHeight else inSampleSize Math.round.. float imageHeight float reqHeight else inSampleSize Math.round float imageWidth float reqWidth Second way int inSampleSize..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device reqHeight width reqWidth if width height inSampleSize Math.round float height float reqHeight else inSampleSize Math.round float.. Math.round float height float reqHeight else inSampleSize Math.round float width float reqWidth return inSampleSize Edited For Resource.. width to requested height and width final int heightRatio Math.round float height float reqHeight final int widthRatio Math.round..
Android: How to detect when a scroll has ended http://stackoverflow.com/questions/2089552/android-how-to-detect-when-a-scroll-has-ended scrolling along the X axis mIsScrolling true handleScroll Math.round e2.getX e1.getX return true @Override Don't know why but..
How to layout text to flow around an image http://stackoverflow.com/questions/2248759/how-to-layout-text-to-flow-around-an-image the number of lines and width of the image int lines int Math.round height textLineHeight For an html text you can use this line..
Decoding bitmaps in Android with the right size http://stackoverflow.com/questions/2641726/decoding-bitmaps-in-android-with-the-right-size sampleSizeF float width float newWidth int sampleSize Math.round sampleSizeF BitmapFactory.Options resample new BitmapFactory.Options..
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 Calculate the actual dimensions final int actW Math.round origW scaleX final int actH Math.round origH scaleY Log.e DBG.. final int actW Math.round origW scaleX final int actH Math.round origH scaleY Log.e DBG origW origH actW actH scales x scaleX..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android
android color between two colors, based on percentage? http://stackoverflow.com/questions/4414673/android-color-between-two-colors-based-on-percentage int ave int src int dst float p return src java.lang.Math.round p dst src Well this works but I would like the colors at around.. static float ave float src float dst float p return src Math.round p dst src java android colors share improve this question..
http://stackoverflow.com/questions/5050272/android-seekbarpreference sbarParams new RelativeLayout.LayoutParams Math.round scale 160 RelativeLayout.LayoutParams.WRAP_CONTENT RelativeLayout.LayoutParams.. preferenceText.getId indParams.setMargins Math.round 20 scale 0 0 0 indParams.addRule RelativeLayout.RIGHT_OF sbar.getId.. SeekBar seekBar int progress boolean fromUser progress Math.round float progress interval interval if callChangeListener progress..
Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions? http://stackoverflow.com/questions/8232608/fit-image-into-imageview-keep-aspect-ratio-and-then-resize-imageview-to-image-d .getResources .getDisplayMetrics .density return Math.round float dp density The xml code for the ImageView ImageView a..
Formula px to dp, dp to px android http://stackoverflow.com/questions/8309354/formula-px-to-dp-dp-to-px-android getContext .getResources .getDisplayMetrics int px Math.round dp displayMetrics.xdpi DisplayMetrics.DENSITY_DEFAULT return.. getContext .getResources .getDisplayMetrics int dp Math.round px displayMetrics.xdpi DisplayMetrics.DENSITY_DEFAULT return..
Bitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled need to scale the image First way if imageHeight reqHeight imageWidth reqWidth if imageWidth imageHeight inSampleSize Math.round float imageHeight float reqHeight else inSampleSize Math.round float imageWidth float reqWidth Second way int inSampleSize.. reqWidth if imageWidth imageHeight inSampleSize Math.round float imageHeight float reqHeight else inSampleSize Math.round float imageWidth float reqWidth Second way int inSampleSize Math.min imageWidth reqWidth imageHeight reqHeight The you..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device final int width options.outWidth int inSampleSize 1 if height reqHeight width reqWidth if width height inSampleSize Math.round float height float reqHeight else inSampleSize Math.round float width float reqWidth return inSampleSize Edited For Resource.. height reqHeight width reqWidth if width height inSampleSize Math.round float height float reqHeight else inSampleSize Math.round float width float reqWidth return inSampleSize Edited For Resource do this public static Bitmap decodeSampledBitmapFromResource.. reqHeight width reqWidth Calculate ratios of height and width to requested height and width final int heightRatio Math.round float height float reqHeight final int widthRatio Math.round float width float reqWidth Choose the smallest ratio as inSampleSize..
Android: How to detect when a scroll has ended http://stackoverflow.com/questions/2089552/android-how-to-detect-when-a-scroll-has-ended e1 MotionEvent e2 float distanceX float distanceY i'm only scrolling along the X axis mIsScrolling true handleScroll Math.round e2.getX e1.getX return true @Override Don't know why but we need to intercept this guy and return true so that the other..
How to layout text to flow around an image http://stackoverflow.com/questions/2248759/how-to-layout-text-to-flow-around-an-image messageView.getPaint .getTextSize Set the span according to the number of lines and width of the image int lines int Math.round height textLineHeight For an html text you can use this line SpannableStringBuilder ss SpannableStringBuilder Html.fromHtml..
Decoding bitmaps in Android with the right size http://stackoverflow.com/questions/2641726/decoding-bitmaps-in-android-with-the-right-size int newWidth calculateNewWidth int width int height float sampleSizeF float width float newWidth int sampleSize Math.round sampleSizeF BitmapFactory.Options resample new BitmapFactory.Options resample.inSampleSize sampleSize bitmap BitmapFactory.decodeFile..
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 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 actW actH scales x scaleX y scaleY Note To get.. 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 actW actH scales x scaleX y scaleY Note To get the image transformation Matrix from..
Calculate compass bearing / heading to location in Android http://stackoverflow.com/questions/4308262/calculate-compass-bearing-heading-to-location-in-android
android color between two colors, based on percentage? http://stackoverflow.com/questions/4414673/android-color-between-two-colors-based-on-percentage Color.blue c0 Color.blue c1 p return Color.argb a r g b private int ave int src int dst float p return src java.lang.Math.round p dst src Well this works but I would like the colors at around 50 being more lightend as I use them on a grey background.... g int 1.7f y 0.509f r 0.194f b return Color.rgb r g b private static float ave float src float dst float p return src Math.round p dst src java android colors share improve this question My 0.02 I found this answer and coded up the proper solution...
http://stackoverflow.com/questions/5050272/android-seekbarpreference RelativeLayout.LayoutParams.WRAP_CONTENT RelativeLayout.LayoutParams sbarParams new RelativeLayout.LayoutParams Math.round scale 160 RelativeLayout.LayoutParams.WRAP_CONTENT RelativeLayout.LayoutParams indParams new RelativeLayout.LayoutParams.. RelativeLayout.ALIGN_PARENT_LEFT sbarParams.addRule RelativeLayout.RIGHT_OF preferenceText.getId indParams.setMargins Math.round 20 scale 0 0 0 indParams.addRule RelativeLayout.RIGHT_OF sbar.getId preferenceText.setLayoutParams textParams sbar.setLayoutParams.. return layout @Override public void onProgressChanged SeekBar seekBar int progress boolean fromUser progress Math.round float progress interval interval if callChangeListener progress seekBar.setProgress int this.oldValue return seekBar.setProgress..
Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions? http://stackoverflow.com/questions/8232608/fit-image-into-imageview-keep-aspect-ratio-and-then-resize-imageview-to-image-d done private int dpToPx int dp float density getApplicationContext .getResources .getDisplayMetrics .density return Math.round float dp density The xml code for the ImageView ImageView a id @ id image_box a background #ff0000 a src @drawable star..
Formula px to dp, dp to px android http://stackoverflow.com/questions/8309354/formula-px-to-dp-dp-to-px-android dp to pixel public int dpToPx int dp DisplayMetrics displayMetrics getContext .getResources .getDisplayMetrics int px Math.round dp displayMetrics.xdpi DisplayMetrics.DENSITY_DEFAULT return px Convert pixel to dp public int pxToDp int px DisplayMetrics.. pixel to dp public int pxToDp int px DisplayMetrics displayMetrics getContext .getResources .getDisplayMetrics int dp Math.round px displayMetrics.xdpi DisplayMetrics.DENSITY_DEFAULT return dp Note that there are xdpi and ydpi properties you might want..
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