Errors while attempting to load the image from the web URL

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)

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

Related Articles