Android - Convert String to byte[]

Question

I want to convert the string of "icon" to byte array and than to convert it to Bitmap. The problem is the image in the emulator is not displaying. I suppose I'm not doing right but I know why. I would greatly appreciate your help. Thanks in advance

This is my JSON Data :

{
    "project": [
        {
            "abbreviation": "abd",
            "customer": "customer1",
            "description": "description1",
            "icon": "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",
            "name": "projectname1",
            "plannedEndDate": "2012-05-25T00:00:00+01:00",
            "plannedStartDate": "2012-05-23T00:00:00+01:00",
            "projectStatus": {
                "name": "Opened"
            },
            "realEndDate": "2012-05-25T00:00:00+01:00",
            "realStartDate": "2012-05-23T00:00:00+01:00"
        }
    ]
}

I did it like that but it's not working :

// convert String to byte[]
String stringToConvert = project.getIcon();
byte[] theByteArray = stringToConvert.getBytes();

// convert Byte[] to Bitmap
Bitmap bm = BitmapFactory.decodeByteArray(theByteArray,
        0, theByteArray.length);
DisplayMetrics dm = new DisplayMetrics();

holder.imageIcon.setMinimumHeight(dm.heightPixels);
holder.imageIcon.setMinimumWidth(dm.widthPixels);
holder.imageIcon.setImageBitmap(bm);

bakriOnFire · Accepted Answer · 2013-05-20 11:43:29Z

17

From the string icon it seems you have converted your image to string by using Base64. So you have to convert it back to bytes using Base64 itself

// Receiving side
byte[] data = Base64.decode(iconString, Base64.DEFAULT);

Hope this helps...

answered May 20, 2013 at 11:43

bakriOnFire

2,6811 gold badge17 silver badges27 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

waqaslam · Accepted Answer · 2013-05-20 11:44:18Z

3

To decode your base64 string to byte[]:

byte[] imgBytes = Base64.decode(strBase64.getBytes());

To convert your byte[] to Bitmap:

Bitmap bitmap = BitmapFactory.decodeByteArray(imgBytes, 0, imgBytes.length)

Now use your bitmap with your images's setImageBitmap method to show the output. For example:

icon.setImageBitmap(bitmap);

answered May 20, 2013 at 11:44

waqaslam

68.3k17 gold badges172 silver badges180 bronze badges

1 Comment

Wijden Over a year ago

Thank you very much but I have to do it like this It get en error when I did it like you said : byte[] imgBytes = Base64.decode(strBase64.getBytes(), Base64.DEFAULT);

Grzegorz Żur · Accepted Answer · 2013-05-20 11:43:56Z

2

Your icon is Base64 encoded, use Base64 class to decode it.

answered May 20, 2013 at 11:43

Grzegorz Żur

49.5k17 gold badges122 silver badges112 bronze badges

Collectives™ on Stack Overflow

Android - Convert String to byte[]

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related