Android Base64字符串转换成图片

public Bitmap stringtoBitmap(String string){     //将字符串转换成Bitmap类型     Bitmap bitmap=null;     try {     byte[]bitmapArray;     bitmapArray=Base64.decode(string, Base64.DEFAULT); bitmap=BitmapFactory.decodeByteArray(bitmapArray, 0, bitmapArray.length); } catch (Exception e) { e.printStackTrace(); }         return bitmap;     }                    public String bitmaptoString(Bitmap bitmap){

//将Bitmap转换成字符串     String string=null;     ByteArrayOutputStream bStream=new ByteArrayOutputStream();     bitmap.compress(CompressFormat.PNG,100,bStream);     byte[]bytes=bStream.toByteArray();     string=Base64.encodeToString(bytes,Base64.DEFAULT);     return string;     }