When i try load an Image, Unknown Host Exception in Android

Question

When i try to load an image into android it gives me the following error

06-10 11:08:50.217: WARN/System.err(868): java.net.UnknownHostException: nopsa.hiit.fi
06-10 11:08:50.217: WARN/System.err(868):     at java.net.InetAddress.lookupHostByName(InetAddress.java:497)
06-10 11:08:50.217: WARN/System.err(868):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:294)
06-10 11:08:50.217: WARN/System.err(868):     at java.net.InetAddress.getAllByName(InetAddress.java:256)
06-10 11:08:50.237: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:69)
06-10 11:08:50.237: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:48)
06-10 11:08:50.272: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:322)
06-10 11:08:50.272: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89)
06-10 11:08:50.272: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHttpConnection(HttpURLConnectionImpl.java:285)
06-10 11:08:50.277: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.makeConnection(HttpURLConnectionImpl.java:267)
06-10 11:08:50.277: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.retrieveResponse(HttpURLConnectionImpl.java:1018)
06-10 11:08:50.297: WARN/System.err(868):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:512)

The file i'm trying to access is http://nopsa.hiit.fi/pmg/viewer/images/thumb_132750728_8f0342f1ac_t.jpg

and the code i used inside onDraw() is following

try {
   URL url = new URL(collectable.getIcon_url());                     
   HttpURLConnection connection  = (HttpURLConnection) url.openConnection();
   InputStream is = connection.getInputStream();
   Bitmap img = BitmapFactory.decodeStream(is);                 
   canvas.drawBitmap(img, 100, 100 , null);
} catch (Exception e) {
   Log.d(TAG, "Image Load Failed");
   e.printStackTrace();
}

And you do ofcourse have internet connection on the device ? Just checking :-) — Karl-Bjørnar Øie, Jun 10 '11 at 11:26
Does collectable.getIcon_url() return a right string? Does it work with another, mock urls? You gotta test this. — Egor, Jun 10 '11 at 11:27
Actually, im running it on emulator?. I thought, since the computer has internet emulator has it too — dinesh707, Jun 10 '11 at 11:28
@Egor: I printed out the URL and checked it on web browser, it works — dinesh707, Jun 10 '11 at 11:29
Try to test your downloader method with a mock url to understand, whether it's a current url's issue or not. And if the computer has internet, emulator will have it too automatically. — Egor, Jun 10 '11 at 11:31

score 2 · Accepted Answer · answered Jun 10 '11 at 11:28

2

If you test on emulator and you are sure you have internet, try to restart the emulator. Sometimes the emulator crashes. I get this error very often.

answered Jun 10 '11 at 11:28

Plamen Nikolov

4,177
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Yes, try restarting, I get this often too. Enable snapshots so it takes less time to cycle the emu. – dmon Jun 10 '11 at 11:31
i restarted it 3 times, no luck. But when i goto internet through emulator it works – dinesh707 Jun 10 '11 at 11:44
1

Replace the host name nopsa.hiit.fi with its real IP address. Do you have a connection? May the problem is in the android's dns cache. is this a new domain? – Plamen Nikolov Jun 10 '11 at 11:50
1

@Pepi, after i changed the host name to IP adress now it gives me a Permission Denied error. Any way the previous problem seems to be solved. – dinesh707 Jun 10 '11 at 12:29
I found the answer to Permission Denied as well. It was at http://stackoverflow.com/questions/5168494/android-socketexception-thrown-when-attempting-httpurlconnection-getoutputstream – dinesh707 Jun 10 '11 at 12:36
@Pepi, if you post your answer separately, I can accept it as the answer – dinesh707 Jun 10 '11 at 12:36

score 2 · Answer 2 · edited Jan 27 '14 at 13:51

2

Permission Denied occurred because I haven't set the permission in the manifest.

I just needed to add:

<uses-permission android:name="android.permission.INTERNET" />

edited Jan 27 '14 at 13:51

Eran

387,369
54
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answered Jul 18 '11 at 23:47

dinesh707

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When i try load an Image, Unknown Host Exception in Android

2 Answers2