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2014/10/16 ¤W¤È 08:20:53
android Programming Glossary: options.injustdecodeboundsBitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeResource getResources R.id.myimage.. inSampleSize Then finally make sure you call options.inJustDecodeBounds false else it will return Bitmap as null Processing Bitmaps..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true Bitmap map BitmapFactory.decodeFile file.getAbsolutePath.. true options.inPreferredConfig Bitmap.Config.RGB_565 options.inJustDecodeBounds false Bitmap bitmap BitmapFactory.decodeFile file.getAbsolutePath..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile path options options.inSampleSize.. reqWidth reqHeight Decode bitmap with inSampleSize set options.inJustDecodeBounds false Bitmap bmp BitmapFactory.decodeFile path options return.. BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeResource res resId options Calculate..
Android - Bitmap cache takes a lot of memory http://stackoverflow.com/questions/18255572/android-bitmap-cache-takes-a-lot-of-memory and there is about 15mb jump after these code lines options.inJustDecodeBounds false return BitmapFactory.decodeResource res resId options.. image according to your needs. btw you don't have to set options.inJustDecodeBounds false since it's the default behavior. in fact you can set null..
BitmapFactory.decodeStream returning null when options are set http://stackoverflow.com/questions/2503628/bitmapfactory-decodestream-returning-null-when-options-are-set Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeStream is null options Boolean scaleByHeight.. Math.log sampleSize Math.log 2d Do the actual decoding options.inJustDecodeBounds false Bitmap img BitmapFactory.decodeStream is null options.. of the image. Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeStream is null options Boolean scaleByHeight..
Choosing background for Live Wallpaper http://stackoverflow.com/questions/3679330/choosing-background-for-live-wallpaper BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true bg BitmapFactory.decodeFile imageBg options SampleSize.. int Math.ceil options.outWidth this.visibleWidth 2 2 options.inJustDecodeBounds false try options.inSampleSize SampleSize bg BitmapFactory.decodeFile..
Quality problems when resizing an image at runtime http://stackoverflow.com/questions/4231817/quality-problems-when-resizing-an-image-at-runtime BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile imageFilePathString options int.. srcWidth 2 desiredWidth srcWidth 2 srcHeight 2 scale 2 options.inJustDecodeBounds false options.inDither false options.inSampleSize scale Bitmap.. BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile STRING_PATH_TO_FILE options int..
Bitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled large Bitmaps Efficiently Loading Large Bitmaps Efficiently BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeResource getResources R.id.myimage options int imageHeight options.outHeight int imageWidth options.outWidth.. reqHeight The you can set the inSampleSize options.inSampleSize inSampleSize Then finally make sure you call options.inJustDecodeBounds false else it will return Bitmap as null Processing Bitmaps Off the UI Thread Processing Bitmap on UI thread is never safe..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly To figure what sample size you should use do the following. BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true Bitmap map BitmapFactory.decodeFile file.getAbsolutePath options int originalHeight options.outHeight int originalWidth..
Out of memory while creating bitmaps on device http://stackoverflow.com/questions/17990086/out-of-memory-while-creating-bitmaps-on-device String path int reqWidth int reqHeight final BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile path options options.inSampleSize calculateInSampleSize options reqWidth reqHeight Decode.. path options options.inSampleSize calculateInSampleSize options reqWidth reqHeight Decode bitmap with inSampleSize set options.inJustDecodeBounds false Bitmap bmp BitmapFactory.decodeFile path options return bmp public int calculateInSampleSize BitmapFactory.Options.. decode with inJustDecodeBounds true to check dimensions final BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeResource res resId options Calculate inSampleSize options.inSampleSize calculateInSampleSize options..
Android - Bitmap cache takes a lot of memory http://stackoverflow.com/questions/18255572/android-bitmap-cache-takes-a-lot-of-memory the code and checked the heap size in the DDMS view in eclipse and there is about 15mb jump after these code lines options.inJustDecodeBounds false return BitmapFactory.decodeResource res resId options in the decodeSampledBitmapFromResource method. The image is.. in drawable nodpi or in the assets folder and downscale the image according to your needs. btw you don't have to set options.inJustDecodeBounds false since it's the default behavior. in fact you can set null for the bitmap options. about downscaling this is another..
BitmapFactory.decodeStream returning null when options are set http://stackoverflow.com/questions/2503628/bitmapfactory-decodestream-returning-null-when-options-are-set is null options InputStream is connection.getInputStream Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeStream is null options Boolean scaleByHeight Math.abs options.outHeight TARGET_HEIGHT Math.abs.. TARGET_WIDTH options.inSampleSize int Math.pow 2d Math.floor Math.log sampleSize Math.log 2d Do the actual decoding options.inJustDecodeBounds false Bitmap img BitmapFactory.decodeStream is null options java android image bitmap share improve this question The.. you have to create a new InputStream for the actual sampling of the image. Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeStream is null options Boolean scaleByHeight Math.abs options.outHeight TARGET_HEIGHT Math.abs..
Choosing background for Live Wallpaper http://stackoverflow.com/questions/3679330/choosing-background-for-live-wallpaper 480 if new File imageBg .exists int SampleSize 1 do BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true bg BitmapFactory.decodeFile imageBg options SampleSize int Math.ceil options.outWidth this.visibleWidth 2 2 options.inJustDecodeBounds.. true bg BitmapFactory.decodeFile imageBg options SampleSize int Math.ceil options.outWidth this.visibleWidth 2 2 options.inJustDecodeBounds false try options.inSampleSize SampleSize bg BitmapFactory.decodeFile imageBg options catch OutOfMemoryError e SampleSize..
Quality problems when resizing an image at runtime http://stackoverflow.com/questions/4231817/quality-problems-when-resizing-an-image-at-runtime Strange out of memory issue to decode the bitmap into memory BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile imageFilePathString options int srcWidth options.outWidth int srcHeight options.outHeight.. int srcHeight options.outHeight int scale 1 while srcWidth 2 desiredWidth srcWidth 2 srcHeight 2 scale 2 options.inJustDecodeBounds false options.inDither false options.inSampleSize scale Bitmap sampledSrcBitmap BitmapFactory.decodeFile imageFilePathString.. coming across this problem. Get the source image's dimensions BitmapFactory.Options options new BitmapFactory.Options options.inJustDecodeBounds true BitmapFactory.decodeFile STRING_PATH_TO_FILE options int srcWidth options.outWidth int srcHeight options.outHeight..
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