bitmap转base64

参考：https://stackoverflow.com/questions/9224056/android-bitmap-to-base64-string

public static Bitmap convert(String base64Str) throws IllegalArgumentException
 {
     byte[] decodedBytes = Base64.decode(
         base64Str.substring(base64Str.indexOf(",")  + 1),
         Base64.DEFAULT
     );

     return BitmapFactory.decodeByteArray(decodedBytes, 0, decodedBytes.length);
 }

 public static String convert(Bitmap bitmap)
 {
     ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
     bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);

     return Base64.encodeToString(outputStream.toByteArray(), Base64.DEFAULT);
 }

以后有问题优先到国外网站上去找，国内的抄来超去，而且还是10年前的东西。。。