Image code processing on the Android website

1     /**2 * Get compressed picture (Guenter picture loading corresponding code)3      * 4      * @paramRes5      * @paramresId6      * @paramReqwidth7 * Minimum width required for picture compression size8      * @paramReqheight9 * Required image compression size min. heightTen      * @return One      */ A      Public StaticBitmap Decodesampledbitmapfromresource (Resources res, -             intResId,intReqwidth,intreqheight) { -  the         //first do not load the picture, only get the picture size -         FinalBitmapfactory.options Options =Newbitmapfactory.options (); -         //When Injustdecodebounds is set to true, pictures are not loaded to get picture size information only -Options.injustdecodebounds =true; +         //only the picture information is saved to the options object, and the Decode method does not return the bitmap object - Bitmapfactory.decoderesource (res, resId, options); +  A         //when calculating the compression ratio, such as insamplesize=4, the picture is compressed into the original atOptions.insamplesize =calculateinsamplesize (Options, Reqwidth, - reqheight); -  -         //when Injustdecodebounds is set to False, Bitmapfactory.decode ... It will return the picture object. -Options.injustdecodebounds =false; -         //gets the compressed picture object using the calculated scale value in         returnBitmapfactory.decoderesource (res, resId, options); -     } to  +     /** - * Calculate Compression scale value (Guenter picture load corresponding code) the      *  *      * @paramOptions $ * Parse image configuration informationPanax Notoginseng      * @paramReqwidth - * Minimum width required for picture compression size the      * @paramReqheight + * Required image compression size min. height A      * @return the      */ +      Public Static intcalculateinsamplesize (bitmapfactory.options Options, -             intReqwidth,intreqheight) { $         //Save Picture Original width high value $         Final intHeight =Options.outheight; -         Final intwidth =Options.outwidth; -         //Initialize compression scale to 1 the         intInsamplesize = 1; - Wuyi         //when the image width is high value any one larger than the desired compressed picture width high value, enter the cyclic computing system the         if(Height > Reqheight | | width >reqwidth) { -  Wu             Final intHalfheight = HEIGHT/2; -             Final intHalfwidth = WIDTH/2; About  $             //the compression scale value increases by twice times per cycle, -             //until half of the original width and height is divided by the compression value, which is greater than the desired width and height value -              while((halfheight/insamplesize) >=Reqheight -&& (halfwidth/insamplesize) >=reqwidth) { AInsamplesize *= 2; +             } the         } -         returninsamplesize; $}

Image code processing on the Android website