Converting String into Bitmap

Question

I'm trying to convert String into Bitmap object to put it then on ImageView. String value is downloaded from web and is not null. Actually it is a jpeg file which I can download and open via browser.

I tried to use BitmapFactory.decodeByteArray method but got --- SkImageDecoder::Factory returned null message.

try{
      byte[] encodeByte = encodedString.getBytes();
      Bitmap bitmap = BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
      return bitmap;
    } catch(Exception e){
       e.printStackTrace();
       return null;
 }

encodedString is actually a string I downloaded before:

...
HttpEntity resEntity = response.getEntity();
String encodedString = EntityUtils.toString(resEntity);
...

@Alex do you mean to write a string into the file and then read it? — Ilya Blokh, Aug 22 '14 at 13:29
@Alex I tried to write the string into internal storage and read it then but the result is same (not surprise honestly)..Could you clarify what do you mean under locally stored string? — Ilya Blokh, Aug 22 '14 at 13:46
@deadfish this image is valid because I get jpg when I download from browser. The issue is to do it programmatically — Ilya Blokh, Sep 01 '14 at 07:14
string you gave me is not valid, it should be data without new lines. Can you share working link? — deadfish, Sep 02 '14 at 08:31
When you convert binary data to a string, it changes the data (to valid characgers, goes through encoding). — yoah, Oct 08 '14 at 06:08
@yoah I don't convert binary to string, I convert string to binary. `encodedString.getBytes();` — Ilya Blokh, Oct 08 '14 at 06:14
When you call EntityUtils.toString(resEntity), you convert binary to string — yoah, Oct 08 '14 at 08:02

score 2 · Accepted Answer · answered Oct 08 '14 at 09:24

As mentioned in comments, when converting binary data to a string, it changes the data (to valid characgers, goes through encoding) at EntityUtils.toString(resEntity)

Thanks to @yoah

Changed code to

byte[] img = EntityUtils.toByteArray(resEntity);

and then passed this byte array into BitmapFactory

Bitmap bitmap = BitmapFactory.decodeByteArray(img, 0, img.length);

Image displays correctly.

So, the conclusion is that is better to operate with byte array than with accessory String.

Converting String into Bitmap

1 Answers1