The image did not appear at all

Question

the image did not appear at all , there is an exception is always caught by try catch and the image has never been appeared

URL url = null;
try {
    url = new URL(currentBook.getImageLink());
    Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
    bookImageView.setImageBitmap(bmp);
} catch (MalformedURLException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

*there is an exception is always caught by try catch* Which exception?? — AskNilesh, Jun 20 '19 at 07:45
I think you are getting `NetworkOnMainThreadException` right? please check this post https://stackoverflow.com/q/6343166/7666442 — AskNilesh, Jun 20 '19 at 07:47
Why are you performing network operations on the UI thread? Did you read any Android guides? — Zun, Jun 20 '19 at 07:51
thank you Jens. thank you all commenters , i solved my problem — Osama Aldawoody, Jun 20 '19 at 08:04
@OsamaAldawoody If you solved your problem, then please post your solution as answer and accept it. Accepting your own answer is allowed. This way other users immediately see what solved the problem for you etc. — Jens, Jun 20 '19 at 09:02
it 's not my own answer , i remembered from the comments to use background thread ==> using AsyncTask — Osama Aldawoody, Jun 20 '19 at 10:54
and i used this line of code in mainifest file ==> android:usesCleartextTraffic="true" — Osama Aldawoody, Jun 20 '19 at 10:57

Osama Aldawoody · Answer 1 · 2019-06-20T11:14:54.793

I used this line of code in mainifest file

android:usesCleartextTraffic="true"

and this my code solution using background thread

private class imageAsyncTask extends AsyncTask{ @Override protected Bitmap doInBackground(String... url) { if (url.length < 1 || url[0] == null){ return null; }
    URL realyUrl = null;
    try {

            realyUrl = new URL(url[0]);
            bmp = BitmapFactory.decodeStream(realyUrl.openConnection().getInputStream());


    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }


    return bmp;
}

@Override
protected void onPostExecute(Bitmap bitmap) {

    if (bitmap != null){

        bookImageView.setImageBitmap(bitmap);
    }
} }

The image did not appear at all

1 Answers1