MainActivity me donne destruction NullPointerException sur HoneyComb

Chaque fois que l'utilisateur quitte mon application (MainActivity) en utilisant nid d'abeille Je reçois l'erreur suivante:MainActivity me donne destruction NullPointerException sur HoneyComb

06-12 02:30:42.612: E/AndroidRuntime(322): FATAL EXCEPTION: main 
06-12 02:30:42.612: E/AndroidRuntime(322): java.lang.RuntimeException: Unable to destroy activity {com.maddogs.mymoney/com.maddogs.mymoney.MainActivity}: java.lang.NullPointerException 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3655) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3673) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread.access$2900(ActivityThread.java:125) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.os.Looper.loop(Looper.java:123) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread.main(ActivityThread.java:4627) 
06-12 02:30:42.612: E/AndroidRuntime(322): at java.lang.reflect.Method.invokeNative(Native Method) 
06-12 02:30:42.612: E/AndroidRuntime(322): at java.lang.reflect.Method.invoke(Method.java:521) 
06-12 02:30:42.612: E/AndroidRuntime(322): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
06-12 02:30:42.612: E/AndroidRuntime(322): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
06-12 02:30:42.612: E/AndroidRuntime(322): at dalvik.system.NativeStart.main(Native Method) 
06-12 02:30:42.612: E/AndroidRuntime(322): Caused by: java.lang.NullPointerException 
06-12 02:30:42.612: E/AndroidRuntime(322): at com.maddogs.mymoney.adapters.PeopleCursorAdapter.getItemId(PeopleCursorAdapter.java:69) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.widget.AbsListView.onSaveInstanceState(AbsListView.java:885) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.widget.ListView.onSaveInstanceState(ListView.java:3625) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.widget.AdapterView.access$100(AdapterView.java:42) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.widget.AdapterView$AdapterDataSetObserver.onInvalidated(AdapterView.java:800) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.database.DataSetObservable.notifyInvalidated(DataSetObservable.java:43) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.widget.BaseAdapter.notifyDataSetInvalidated(BaseAdapter.java:54) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.support.v4.widget.CursorAdapter.swapCursor(CursorAdapter.java:352) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.support.v4.widget.CursorAdapter.changeCursor(CursorAdapter.java:315) 
06-12 02:30:42.612: E/AndroidRuntime(322): at com.maddogs.mymoney.MainActivity.onLoaderReset(MainActivity.java:311) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.support.v4.app.LoaderManagerImpl$LoaderInfo.destroy(LoaderManager.java:339) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.support.v4.app.LoaderManagerImpl.doDestroy(LoaderManager.java:776) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.support.v4.app.FragmentActivity.onDestroy(FragmentActivity.java:337) 
06-12 02:30:42.612: E/AndroidRuntime(322): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3642) 
06-12 02:30:42.612: E/AndroidRuntime(322): ... 11 more

Je ne peux pas comprendre pourquoi cela se produit sur Honeycomb mais pas plus tard versions (j'ai testé en utilisant Android 4.2 sur mon S3 mobile).

Mon code:

PeopleCursorAdapter:

package com.maddogs.mymoney.adapters; 

import android.content.Context; 
import android.database.Cursor; 
import android.graphics.Color; 
import android.support.v4.widget.CursorAdapter; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.maddogs.mymoney.R; 
import com.maddogs.mymoney.provider.MyMoneyContract.Users; 
import com.maddogs.mymoney.utils.Utils; 
import com.squareup.picasso.Picasso; 

public class PeopleCursorAdapter extends CursorAdapter { 

    Context context; 
    LayoutInflater inflater; 

    public PeopleCursorAdapter(Context context, Cursor c, int flags) { 
     super(context, c, flags); 

     this.context = context; 
     inflater = LayoutInflater.from(context); 
    } 

    @Override 
    public void bindView(View arg0, Context arg1, Cursor arg2) { 
     // String id = 
     // arg2.getString(arg2.getColumnIndexOrThrow(Users.USER_ID)); 

     String name = arg2.getString(arg2 
       .getColumnIndexOrThrow(Users.USER_NAME)); 

     // String email = arg2.getString(arg2 
     // .getColumnIndexOrThrow(Users.USER_EMAIL)); 

     // String profilePic = arg2.getString(arg2 
     // .getColumnIndexOrThrow(Users.USER_PROFILEPIC)); 

     Double value = arg2.getDouble(arg2 
       .getColumnIndexOrThrow(Users.USER_BALANCE)); 

     TextView nameTextView = (TextView) arg0.findViewById(R.id.peopleName); 
     nameTextView.setText(name); 

     TextView valueTextView = (TextView) arg0 
       .findViewById(R.id.peopleDebitsBalance); 
     if (value >= 0.00) 
      valueTextView.setTextColor(Color.parseColor("#0000ff")); 
     else 
      valueTextView.setTextColor(Color.RED); 

     valueTextView.setText(Utils.convertCurrency(arg1, value)); 

     ImageView profilePicImageView = (ImageView) arg0 
       .findViewById(R.id.peopleProfilePicture); 

     Picasso.with(context).load(R.drawable.rata_logo) 
       .into(profilePicImageView); 
    } 

    @Override 
    public long getItemId(int position) { 
     Cursor c = getCursor(); 
     if (c.moveToPosition(position)) { 
      return Long.valueOf(c.getInt(c.getColumnIndexOrThrow(Users._ID))); 
     } else 
      return -1; 
    } 

    public String getPersonName(int position) { 
     Cursor c = getCursor(); 
     if (c.moveToPosition(position)) { 
      return c.getString(c.getColumnIndexOrThrow(Users.USER_NAME)); 
     } else 
      return null; 
    } 

    @Override 
    public View newView(Context arg0, Cursor arg1, ViewGroup arg2) { 
     return inflater.inflate(R.layout.adapter_people, arg2, false); 
    } 

}

MainActivity (quelques extraits):

public class MainActivity extends ActionBarListActivity implements 
     OnItemClickListener, OnItemLongClickListener, LoaderCallbacks<Cursor> { 
... 
@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(
     getSupportLoaderManager().initLoader(0, null, this); 

     adapter = new PeopleCursorAdapter(this, null, 0); 
     this.setListAdapter(adapter); 
... 
@Override 
    public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { 
     CursorLoader loader = new CursorLoader(this, UsersListView.CONTENT_URI, 
       new String[] { Users.USER_BALANCE, Users.USER_NAME, 
         Users.USER_ID, Users._ID }, null, null, null); 

     return loader; 
    } 

    @Override 
    public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) { 
     this.adapter.changeCursor(arg1); 
    } 

    @Override 
    public void onLoaderReset(Loader<Cursor> arg0) { 
     this.adapter.changeCursor(null); 
    }

Merci

Source

2014-06-12 Leonardo

ce qui est la ligne 69 si le PeopleCursorAdapter? –

'if (c.moveToPosition (position)) {' – Leonardo

ne voulait pas, mais résolu le faire:

@Override 
    public long getItemId(int position) { 
     Cursor c = getCursor(); 
     if (c == null) 
      return -1; 
     if (c.moveToPosition(position)) { 
      return Long.valueOf(c.getInt(c.getColumnIndexOrThrow(Users._ID))); 
     } else 
      return -1; 
    } 

    public String getPersonName(int position) { 
     Cursor c = getCursor(); 
     if (c == null) 
      return null; 
     if (c.moveToPosition(position)) { 
      return c.getString(c.getColumnIndexOrThrow(Users.USER_NAME)); 
     } else 
      return null; 
    }

Source

2014-06-12 03:45:19 Leonardo

Dans votre OnDestroy vous devez vérifier si l'adaptateur est non nul et retirez le curseur sous-jacent de votre adaptateur

exemple:

protected void onDestroy() { 
    if(adapter != null) { 
     adapter.changeCursor(null); 
     adapter = null; 
    } 
    super.onDestroy(); 

}

vérificateur

@Override 
public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) { 
    if(this.adapter != null) 
     this.adapter.changeCursor(arg1); 
} 

@Override 
public void onLoaderReset(Loader<Cursor> arg0) { 
    if(this.adapter != null) 
     this.adapter.changeCursor(null); 
}

Source

2014-06-12 03:18:19

Ne fonctionnait pas, même erreur! – Leonardo

@LeonardoFerrari se produit-il seulement en quittant l'application? –

Oui, sur nid d'abeille seulement (Pour les versions plus anciennes, était le seul que j'ai testé.Pour les versions plus récentes (4.2) cela ne se produit pas du tout!) – Leonardo

MainActivity me donne destruction NullPointerException sur HoneyComb

Répondre

Questions connexes