decode - Android BitmapFactory decodeStream() -


i have question seem find answer nowhere. lines of code:

final bitmapfactory.options options = new bitmapfactory.options();     options.injustdecodebounds = true;      bitmapfactory.decodestream(is, null, options);

actually mean that, file being downloaded? android docs this:

decode injustdecodebounds=true check dimensions

and does: 

options.insamplesize = calculateinsamplesize(options, reqwidth,             reqheight);      // decode bitmap insamplesize set     options.injustdecodebounds = false;     bitmapfactory.decodestream(is, null, options);

means download file smaller (not downloaded original size , copied after smaller size bitmap).

clear example: have url's point many 2000 x 1500 images. decoding files , loading them bitmaps, need have enough memory downloading file @ full resolution (2000 x 1500), if need thumbnails of (200 x 150)?

i know answer has been accepted right 1 clarity...

this line options.injustdecodebounds = true; means call bitmapfactory.decodestream(is, null, options); doesn't bitmap information bounding information , mimetype.

you can use these returned values, outwidth, outheight , outmimetype 'resampled' version of bitmap data setting options.injustdecodebounds = false; , setting sample size given ratio determined desired output dimensions options. insamplesize = [int].

see informative page more information: loading large bitmaps efficiently


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