Converting imageview to base64 and storing it into mysql and how to decode it in Android

Question

I have encoded the imageview using base64 and passed that value to textview as hidden as i have successfully inserted into db. my code to encode:

public void convertImg(){
    imageView.buildDrawingCache();
    Bitmap bm = imageView.getDrawingCache();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.JPEG, 100, baos); //bm is the bitmap object
    byte[] b = baos.toByteArray();
    String encodedImage = Base64.encodeToString(b , Base64.DEFAULT);
    base64.setText(encodedImage);
}

This is what im getting in my mysql db. is it correct? My question is how to decode it and where to see/view it?

Perhaps you are referring to server side decoding. Have you seen: https://stackoverflow.com/a/34112174/295004 — Morrison Chang, Jun 07 '18 at 04:40

score 1 · Answer 1 · answered Jun 07 '18 at 04:40

1

you have to implement BitmapFactory.decodeByteArray() for decode your image base64 string have look this.

//decode base64 string to image
imageBytes = Base64.decode(encodedImage , Base64.DEFAULT);
Bitmap decodedImage = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
mage.setImageBitmap(decodedImage);

Hope it will help you!!

answered Jun 07 '18 at 04:40

Hemant Parmar

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in the image what m getting by encoding, is it correct? – Marco Polo Jun 07 '18 at 04:47
you will get view of image ! – Hemant Parmar Jun 07 '18 at 04:48
This may help http://codesfor.in/how-to-upload-image-to-server-as-base64-encoded-string/ – Ramees Jun 07 '18 at 05:02

score 1 · Accepted Answer · answered Jun 07 '18 at 05:48

1

Your image encoding looks right. To decode encoded string back to image you need to implement BitmapFactory.

First get bytes from the encoded string. Then use BitmapFactory to decode the byte array. BitmapFactory.decodeByteArray returns a bitmap that you then can use in an imageView.

byte[] b = Base64.decode(encodedString,Base64.DEFAULT);
Bitmap bitmap = BitmapFactory.decodeByteArray(b,0,b.length);
imageView.setImageBitmap(bitmap);

answered Jun 07 '18 at 05:48

Speditz

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can i write php code to decode and view it in my localhost web browser? – Marco Polo Jun 07 '18 at 05:58
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I personally don't know, take a quick look into [this thread](https://stackoverflow.com/a/15153931/6623419), you might find it helpful. – Speditz Jun 07 '18 at 06:02

score 0 · Answer 3 · answered Jun 07 '18 at 04:34

Since this was tagged Android I assume you're referring to sqlite?

Not a direct answer to your question but in sqlite you can store the binary blob without conversion to base64 first. It may be more efficient in your case since converting to/from base64 has a cost.

https://www.sqlite.org/datatype3.html

Converting imageview to base64 and storing it into mysql and how to decode it in Android

3 Answers3