生成水印的過程。其實(shí)分為三個環(huán)節(jié)：第一，載入原始圖片；第二，載入水印圖片；第三，保存新的圖片。

Java代碼 ?

*?/**?

*?????*?create?the?bitmap?from?a?byte?array?

*?????*?

*?????*?@param?src?the?bitmap?object?you?want?proecss?

*?????*?@param?watermark?the?water?mark?above?the?src?

*?????*?@return?return?a?bitmap?object?,if?paramter's?length?is?0,return?null?

*?????*/??

*????private?Bitmap?createBitmap(?Bitmap?src,?Bitmap?watermark?)???

*????{???

*????????String?tag?=?"createBitmap";???

*????????Log.d(?tag,?"create?a?new?bitmap"?);???

*????????if(?src?==?null?)???

*????????{???

*????????????return?null;???

*????????}???

*???

*????????int?w?=?src.getWidth();???

*????????int?h?=?src.getHeight();???

*????????int?ww?=?watermark.getWidth();???

*????????int?wh?=?watermark.getHeight();???

*????????//create?the?new?blank?bitmap???

*????????Bitmap?newb?=?Bitmap.createBitmap(?w,?h,?Config.ARGB_8888?);//創(chuàng)建一個新的和SRC長度寬度一樣的位圖???

*????????Canvas?cv?=?new?Canvas(?newb?);???

*????????//draw?src?into???

*????????cv.drawBitmap(?src,?0,?0,?null?);//在?0，0坐標(biāo)開始畫入src???

*????????//draw?watermark?into???

*????????cv.drawBitmap(?watermark,?w?-?ww?+?5,?h?-?wh?+?5,?null?);//在src的右下角畫入水印???

*????????//save?all?clip???

*????????cv.save(?Canvas.ALL_SAVE_FLAG?);//保存???

*????????//store???

*????????cv.restore();//存儲???

*????????return?newb;???

*????}??

轉(zhuǎn)載于:https://www.cnblogs.com/visuals/p/4819107.html

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