Charger le fichier XML du site dans android

Question

J'essaie de charger le fichier xml dans mon application Android. Lors de l'exécution de userList.setInput (xmlUrl.openStream(), null); Je vois le message "L'application s'est arrêtée de manière inattendue".

URL xmlUrl = null; 
       String tmp = ""; 
       Log.d(LOG_TAG, "BUTTON IS ON"); 

       try { 
        xmlUrl = new URL("http://55.55.55.55/1.xml"); 
        Log.d(LOG_TAG, "1"); 
       } catch (MalformedURLException e) {    
        e.printStackTrace(); 
       } 
       XmlPullParser userList = null; 
       try { 
        userList = XmlPullParserFactory.newInstance().newPullParser(); 
        Log.d(LOG_TAG, "2"); 
       } catch (XmlPullParserException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       try { 
        userList.setInput(xmlUrl.openStream(), null); 
        Log.d(LOG_TAG, "3"); 
       } catch (XmlPullParserException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
        Log.d(LOG_TAG, "3x"); 
       } catch (IOException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
        Log.d(LOG_TAG, "3y"); 
       } 

Qu'est-ce que je fais mal? dans le journal, je vois:

12-07 11:53:33.712: DEBUG/dalvikvm(263): GC_EXPLICIT freed 3K, 11% free 17590K/19719K, paused 3ms+4ms 
12-07 11:53:33.892: INFO/ActivityManager(88): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.example.hotdog_master/.MainActivity } from pid 263 
12-07 11:53:33.892: WARN/WindowManager(88): Failure taking screenshot for (230x135) to layer 21005 
12-07 11:53:33.952: INFO/ActivityManager(88): Start proc com.example.hotdog_master for activity com.example.hotdog_master/.MainActivity: pid=778 uid=10036 gids={3003} 
12-07 11:53:35.682: INFO/ActivityManager(88): Displayed com.example.hotdog_master/.MainActivity: +1s746ms 
12-07 11:53:36.714: DEBUG/dalvikvm(263): GC_EXPLICIT freed 7K, 11% free 17592K/19719K, paused 3ms+4ms 
12-07 11:53:39.112: DEBUG/AndroidRuntime(778): Shutting down VM 
12-07 11:53:39.112: WARN/dalvikvm(778): threadid=1: thread exiting with uncaught exception (group=0x40014760) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778): FATAL EXCEPTION: main 
12-07 11:53:39.122: ERROR/AndroidRuntime(778): android.os.NetworkOnMainThreadException 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1077) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at dalvik.system.BlockGuard$WrappedNetworkSystem.connect(BlockGuard.java:368) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:208) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:431) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at java.net.Socket.connect(Socket.java:901) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:75) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:48) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:304) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHttpConnection(HttpURLConnectionImpl.java:292) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.makeConnection(HttpURLConnectionImpl.java:274) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.retrieveResponse(HttpURLConnectionImpl.java:1038) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:523) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at java.net.URL.openStream(URL.java:645) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at com.example.hotdog_master.MainActivity.Xmlworker(MainActivity.java:72) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at com.example.hotdog_master.MainActivity$1.onClick(MainActivity.java:37) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.view.View.performClick(View.java:3110) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.view.View$PerformClick.run(View.java:11934) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.os.Handler.handleCallback(Handler.java:587) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.os.Handler.dispatchMessage(Handler.java:92) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.os.Looper.loop(Looper.java:132) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at android.app.ActivityThread.main(ActivityThread.java:4123) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at java.lang.reflect.Method.invoke(Method.java:491) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 
12-07 11:53:39.122: ERROR/AndroidRuntime(778):  at dalvik.system.NativeStart.main(Native Method) 
12-07 11:53:39.142: WARN/ActivityManager(88): Force finishing activity com.example.hotdog_master/.MainActivity 
12-07 11:53:39.142: WARN/WindowManager(88): Failure taking screenshot for (230x135) to layer 21010 
12-07 11:53:39.662: WARN/ActivityManager(88): Activity pause timeout for ActivityRecord{407709a8 com.example.hotdog_master/.MainActivity} 
12-07 11:53:50.532: WARN/ActivityManager(88): Activity destroy timeout for ActivityRecord{407709a8 com.example.hotdog_master/.MainActivity} 

Answer 1

Il existe deux solutions de ce problème, mais le premier est une excellente solution.

1) N'écrivez pas d'appel réseau dans le thread principal de l'interface utilisateur, utilisez la tâche asynchrone pour cela.

2) Écrivez le code ci-dessous dans votre fichier MainActivity après setContentView(R.layout.activity_main); mais ce n'est pas la bonne façon.

if (android.os.Build.VERSION.SDK_INT > 9) { 
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
    StrictMode.setThreadPolicy(policy); 
} 

Et ci-dessous déclaration d'importation dans votre fichier java.

import android.os.StrictMode; 

Et voir le lien ci-dessous pour plus d'informations.

Caused by: android.os.NetworkOnMainThreadException

Answer 2

Essayez de faire l'analyse syntaxique sur un autre fil à l'exception de thread principal. Vous pouvez le faire en utilisant Async Task et analyser XML dans la méthode doInBackground().

Answer 3

Le problème est que vous ne vous faites votre analyse dans le thread principal mais est-ce que vous faites un appel réseau sur le thread principal! Utiliser une tâche ou un fil asynchrone