Android 画布canvas drawBitmap(Bitmap bitmap, float left, float top, Paint paint)
voiddrawBitmap(Bitmapbitmap,floatleft,floattop,Paintpaint)Drawthespecifiedbitmap,withitstop/leftcornerat(x,y),usingthespecifiedpaint,transformedbythecurrentmatrix.这个方法从(x,y)这个点绘制位图意思。没有返回值,参数有三个,分别是:B