Errors while trying to load image from web url

Question

I am trying to load an image from a web url. I found a stack question that answered this, and said to use this code:

try {
  ImageView i = (ImageView)findViewById(R.id.image);
  Bitmap bitmap = BitmapFactory.decodeStream((InputStream)new URL(imageUrl).getContent());
  i.setImageBitmap(bitmap); 
} catch (MalformedURLException e) {
  e.printStackTrace();
} catch (IOException e) {
  e.printStackTrace();
}

But when I try and run it I get this error:

06-19 14:45:02.598: E/AndroidRuntime(10230): FATAL EXCEPTION: main
06-19 14:45:02.598: E/AndroidRuntime(10230): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.beerportfoliopro/com.example.beerportfoliopro.BeerPage}: android.os.NetworkOnMainThreadException
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2357)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread.access$600(ActivityThread.java:153)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.os.Looper.loop(Looper.java:137)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread.main(ActivityThread.java:5226)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.lang.reflect.Method.invokeNative(Native Method)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.lang.reflect.Method.invoke(Method.java:511)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at dalvik.system.NativeStart.main(Native Method)
06-19 14:45:02.598: E/AndroidRuntime(10230): Caused by: android.os.NetworkOnMainThreadException
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:461)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:433)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.net.URLConnection.getContent(URLConnection.java:190)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at libcore.net.http.HttpsURLConnectionImpl.getContent(HttpsURLConnectionImpl.java:175)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at java.net.URL.getContent(URL.java:447)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at com.example.beerportfoliopro.BeerPage.onCreate(BeerPage.java:52)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.Activity.performCreate(Activity.java:5104)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
06-19 14:45:02.598: E/AndroidRuntime(10230):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)

Andy Res · Accepted Answer · 2013-06-19 19:04:01Z

2

You get a NetworkOnMainThreadException. This is because starting with Android 3.0 and above network operations should not be done in the UI thread, but in a separate thread. You could use an AsyncTask, or an IntentService for this purpose.
With other words, that piece of code that connects to internet and downloads the image should run in a AsyncTask or IntentService

answered Jun 19, 2013 at 19:04

Andy Res

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1 Comment

Mike Over a year ago

I will, Its to early and wont let me for another few minutes

Nilesh Patel · Accepted Answer · 2013-06-21 09:53:31Z

Please try below code

   private Bitmap downloadImage(String imageUrl)
   {

    Bitmap bitmap=null;
    InputStream is;
    try 
    {
    is=openHttp(imageUrl);
    bitmap=BitmapFactory.decodeStream(is);
    is.close();
} 
    catch (Exception e) 
    {
        // TODO: handle exception
}
    return bitmap;
}
private InputStream openHttp(String url) throws IOException
{
    InputStream is=null;
    int res=-1;
    URL u=new URL(url);
    URLConnection con=u.openConnection();
    if(!(con instanceof HttpURLConnection))
        throw new IOException("Not Http Connection");
    try {
        HttpURLConnection httpCon=(HttpURLConnection)con;
        httpCon.setAllowUserInteraction(false);
        httpCon.setInstanceFollowRedirects(true);
        httpCon.setRequestMethod("GET");
        httpCon.connect();
        res=httpCon.getResponseCode();
        if(res==HttpURLConnection.HTTP_OK)
        {
            is=httpCon.getInputStream();
        }
    } 
    catch (Exception e) {
        // TODO: handle exception
    }

    return is;
}

here in downloadImage function rerurn bitmap object. and openHttp return inputstream of image url... check in your application...

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