AsynkTask ne passe pas par onPostExecute()

**ElManoush** · 26/05/2015, 17h44

Hello !

Mon AsynTask marche correctement jusqu'à la fin de l’exécution de doInBackground(). En effet, onPostExecute() n'est jamais appelé. Ce n'est pas un problème d'argument retourné et déclaré comme j'ai pu lire dans certains post déjà créés.

Voici mon code :

Code :

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public class DisplayEvents extends Activity {
 
    public DisplayEvents() {
    }
 
    @Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_lst_events);
        Log.i("monactivity", "test02");
		// Calling async task to get json
		new GetEvents().execute();
	}
 
    class GetEvents extends AsyncTask<Void, Void, Void>
    {
        private ArrayList<Event> listeEvent;
        private ProgressDialog pDialog = new ProgressDialog(DisplayEvents.this);
 
        @Override
        protected void onPreExecute() {
            // TODO i18n
            pDialog.setMessage("Please wait..");
            pDialog.show();
        }
 
        @Override
        protected Void doInBackground(Void... unused) {
            RequestWebService rws = new RequestWebService();
            Log.i("monactivity", "test1");
            try {
                listeEvent = rws.getAllEvents();
            } catch (JSONException e) {
                e.printStackTrace();
            } catch (ParseException e) {
                e.printStackTrace();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            Log.i("monactivity", "test2");
            return null;
        }
 
        @Override
        protected void onPostExecute(Void unused)
        {
 
            if (pDialog.isShowing())
            {
                pDialog.dismiss();
            }
            Log.i("monactivity", "test2");
            /**
             * Affiche la liste des events
             * */
 
            Log.i("monactivity", "test3");
            RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view_event);
 
            // use this setting to improve performance if you know that changes
            // in content do not change the layout size of the RecyclerView
            mRecyclerView.setHasFixedSize(true);
 
            // use a linear layout manager
            RecyclerView.LayoutManager mLayoutManager;
            mLayoutManager = new LinearLayoutManager(DisplayEvents.this);
            mRecyclerView.setLayoutManager(mLayoutManager);
 
            // specify an adapter (see also next example)
            MyAdapterEvent mAdapter = new MyAdapterEvent(listeEvent,this);
            mRecyclerView.setAdapter(mAdapter);
            Log.i("monactivity", "test4");
 
        }
    }
 
}

Mon application crashe après le doInBackground()
En mode débugage pas à pas je m’aperçois que mon code s’arrête dans cette portion de code de la classe AsynkTask.java

Code :

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public synchronized void execute(final Runnable r) {
            mTasks.offer(new Runnable() {
                public void run() {
                    try {
                        r.run();
                    } finally {
                        scheduleNext();
                    }
                }//Stop ici
            });
            if (mActive == null) {
                scheduleNext();
            }
        }

J'ai tenté de renvoyer mon tableau ou des Integer en modifiant comme il se doit les paramètre dans les différents protos mais mon code s’arrête toujours au même endroit.
Je suis à court d'idées. Pourquoi mon programme n'exécute t il pas onPostExecute() ?

Merci pour vos retours !

**Feanorin** · 26/05/2015, 18h13

Peux tu nous montrer le logcat ?

Merci.

**ElManoush** · 26/05/2015, 22h23

J'ai réussi à passer dans mon onPostExecute, j'ai maintenant cette erreur ci, avec toujours un crash

Code :

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05-26 21:47:26.023    2681-2681/com.upo10.miage.upopulse I/art﹕ Not late-enabling -Xcheck:jni (already on)
05-26 21:47:26.068    2681-2681/com.upo10.miage.upopulse W/ActivityThread﹕ Application com.upo10.miage.upopulse is waiting for the debugger on port 8100...
05-26 21:47:26.078    2681-2681/com.upo10.miage.upopulse I/System.out﹕ Sending WAIT chunk
05-26 21:47:26.095    2681-2688/com.upo10.miage.upopulse I/art﹕ Debugger is active
05-26 21:47:26.294    2681-2681/com.upo10.miage.upopulse I/System.out﹕ Debugger has connected
05-26 21:47:26.294    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:26.510    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:26.721    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:26.941    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:27.151    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:27.360    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:27.570    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:27.781    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:27.990    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:28.201    2681-2681/com.upo10.miage.upopulse I/System.out﹕ waiting for debugger to settle...
05-26 21:47:28.411    2681-2681/com.upo10.miage.upopulse I/System.out﹕ debugger has settled (1359)
05-26 21:47:28.477    2681-2681/com.upo10.miage.upopulse I/zzx﹕ Making Creator dynamically
05-26 21:47:28.479    2681-2681/com.upo10.miage.upopulse W/ResourcesManager﹕ Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources.
05-26 21:47:28.479    2681-2681/com.upo10.miage.upopulse W/ResourcesManager﹕ Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources.
05-26 21:47:28.514    2681-2681/com.upo10.miage.upopulse I/Google Maps Android API﹕ Google Play services client version: 7095000
05-26 21:47:28.599    2681-2693/com.upo10.miage.upopulse I/art﹕ Background sticky concurrent mark sweep GC freed 1902(136KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 1640KB/1640KB, paused 2.459ms total 101.891ms
05-26 21:47:28.720    2681-2693/com.upo10.miage.upopulse I/art﹕ Background partial concurrent mark sweep GC freed 325(43KB) AllocSpace objects, 0(0B) LOS objects, 39% free, 1620KB/2MB, paused 1.524ms total 119.627ms
05-26 21:47:28.828    2681-2681/com.upo10.miage.upopulse I/Google Maps Android API﹕ Google Play services package version: 7097470
05-26 21:47:29.580    2681-2693/com.upo10.miage.upopulse I/art﹕ Background sticky concurrent mark sweep GC freed 32020(1827KB) AllocSpace objects, 4(64KB) LOS objects, 10% free, 12MB/14MB, paused 1.692ms total 225.154ms
05-26 21:47:29.689    2681-2717/com.upo10.miage.upopulse D/OpenGLRenderer﹕ Render dirty regions requested: true
05-26 21:47:29.692    2681-2681/com.upo10.miage.upopulse D/﹕ HostConnection::get() New Host Connection established 0x9f9f7e30, tid 2681
05-26 21:47:29.698    2681-2681/com.upo10.miage.upopulse D/Atlas﹕ Validating map...
05-26 21:47:29.781    2681-2717/com.upo10.miage.upopulse D/﹕ HostConnection::get() New Host Connection established 0x9ee17120, tid 2717
05-26 21:47:29.792    2681-2717/com.upo10.miage.upopulse I/OpenGLRenderer﹕ Initialized EGL, version 1.4
05-26 21:47:29.808    2681-2717/com.upo10.miage.upopulse D/OpenGLRenderer﹕ Enabling debug mode 0
05-26 21:47:29.829    2681-2717/com.upo10.miage.upopulse W/EGL_emulation﹕ eglSurfaceAttrib not implemented
05-26 21:47:29.830    2681-2717/com.upo10.miage.upopulse W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0x9f9f8ae0, error=EGL_SUCCESS
05-26 21:47:29.986    2681-2714/com.upo10.miage.upopulse D/﹕ HostConnection::get() New Host Connection established 0x9ee3a0b0, tid 2714
05-26 21:47:30.502    2681-2681/com.upo10.miage.upopulse I/HomePageActivity﹕ Location services connected.
05-26 21:47:30.502    2681-2681/com.upo10.miage.upopulse I/HomePageActivity﹕ Location null.
05-26 21:47:31.143    2681-2693/com.upo10.miage.upopulse I/art﹕ Background sticky concurrent mark sweep GC freed 1439(48KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 25MB/25MB, paused 11.255ms total 29.887ms
05-26 21:47:32.446    2681-2693/com.upo10.miage.upopulse I/art﹕ Background sticky concurrent mark sweep GC freed 1331(65KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 64MB/64MB, paused 1.864ms total 413.325ms
05-26 21:47:32.647    2681-2693/com.upo10.miage.upopulse I/art﹕ Background partial concurrent mark sweep GC freed 2179(109KB) AllocSpace objects, 0(0B) LOS objects, 5% free, 64MB/68MB, paused 1.661ms total 198.180ms
05-26 21:47:34.561    2681-2681/com.upo10.miage.upopulse I/Choreographer﹕ Skipped 154 frames!  The application may be doing too much work on its main thread.
05-26 21:47:34.667    2681-2717/com.upo10.miage.upopulse W/EGL_emulation﹕ eglSurfaceAttrib not implemented
05-26 21:47:34.667    2681-2717/com.upo10.miage.upopulse W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0x9e19f620, error=EGL_SUCCESS
05-26 21:47:35.498    2681-2681/com.upo10.miage.upopulse I/Choreographer﹕ Skipped 47 frames!  The application may be doing too much work on its main thread.
05-26 21:47:45.766    2681-2681/com.upo10.miage.upopulse I/monactivity﹕ test02
05-26 21:47:45.863    2681-2719/com.upo10.miage.upopulse I/monactivity﹕ test1
05-26 21:47:52.450    2681-2717/com.upo10.miage.upopulse W/EGL_emulation﹕ eglSurfaceAttrib not implemented
05-26 21:47:52.450    2681-2717/com.upo10.miage.upopulse W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0x9d125a80, error=EGL_SUCCESS
05-26 21:47:54.645    2681-2681/com.upo10.miage.upopulse D/AndroidRuntime﹕ Shutting down VM
05-26 21:47:54.649    2681-2681/com.upo10.miage.upopulse E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.upo10.miage.upopulse, PID: 2681
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView$LayoutManager.onMeasure(android.support.v7.widget.RecyclerView$Recycler, android.support.v7.widget.RecyclerView$State, int, int)' on a null object reference
            at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:1764)
            at android.view.View.measure(View.java:17430)
            at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727)
            at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463)
            at android.view.View.measure(View.java:17430)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
            at android.view.View.measure(View.java:17430)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
            at android.view.View.measure(View.java:17430)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
            at android.view.View.measure(View.java:17430)
            at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
            at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
            at android.view.Choreographer.doCallbacks(Choreographer.java:580)
            at android.view.Choreographer.doFrame(Choreographer.java:550)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:754)
            at android.os.Handler.handleCallback(Handler.java:740)
            at android.os.Handler.dispatchMessage(Handler.java:104)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5223)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
05-26 21:48:26.910    2681-2719/com.upo10.miage.upopulse I/monactivity﹕ test2

D'après mes recherches cela viendrait du fait que je n'ai pas mis le linearLayoutManager , or celui ci est dans mon code de onPostExecute ce qui est étonnant

**Feanorin** · 27/05/2015, 00h38

ton erreur vu le log c'est ça

Code :

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java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView$LayoutManager.onMeasure(android.support.v7.widget.RecyclerView$Recycler, android.support.v7.widget.RecyclerView$State, int, int)' on a null object reference

Un pointeur null dans la fonction onMeasure du RecyclerView. Après je ne sais pas si cela à un rapport ou pas mais ton crash vient de là.

**Hephaistos007** · 27/05/2015, 11h04

Donc il faut voir pourquoi findViewById renvoie null ici :

Code java :

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RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view_event);

AsynkTask ne passe pas par onPostExecute()

Android

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