Android將圖像轉換成流存儲與將流轉換成圖像

//take the image to byte[]
byte[] byteIcon = userIcon;

                    //將字節數組即頭像從二進制流轉換成drawable
                    if(byteIcon != null){
                        
                        ByteArrayInputStream bais = new ByteArrayInputStream(byteIcon);
                        
                        userIconDrawable = Drawable.createFromStream(bais, "image");
                        
                    }





BitMap userIcon;


        //將bitmap轉換成drawable
        ByteArrayOutputStream os = new ByteArrayOutputStream();
　　　　//參數1轉換類型，參數2壓縮質量，參數3字節流資源        

　　　　　　userIcon.compress(CompressFormat.PNG, 100, os);

//將Drawable 轉成bitmap
BitmapDrawable tempDrawable = (BitmapDrawable) DrawableImage;
tempDrawable.getBitmap();