problem passage de cursor position depuis une ListView a viewpager

J essai de récupérer la position du cursor depuis listview dans un fragment et de la passer a viewpager sur un autre fragment, avec cette position je veux me placer sur le même enregistrement mais aussi me deplacer sur les autres enregistrement en viewpager



l evenement onClick sur listview

Code:

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@Override public void onListItemClick(ListView listView, View view, int position, long id) {     super.onListItemClick(listView, view, position, id);   // Get a URI for the selected item, then start an Activity that displays the URI. Any // Activity that filters for ACTION_VIEW and a URI can accept this. In most cases, this will // be a browser.   // Get the item at the selected position, in the form of a Cursor. Cursor c = (Cursor) mAdapter.getItem(position); // Get the link to the article represented by the item. int POSKEY = c.getPosition();   // Intent i = new Intent(Intent.ACTION_VIEW, articleURL);     Uri detailUri = Uri.parse(FeedContract.Entry.CONTENT_URI + "/" + id);     WhatsOnFragment.newInstance(position, detailUri);     FragmentManager fm = getChildFragmentManager(); WhatsOnFragment WWhatsOnFragment = new WhatsOnFragment(); fm.beginTransaction().addToBackStack(null); fm.beginTransaction().replace(R.id.entry_list, WWhatsOnFragment).commit();         }

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le fragament viewpager ou je veux recuperer la position

Code:

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import com.example.android.network.sync.basicsyncadapter.provider.FeedContract; import com.example.android.network.sync.basicsyncadapter.R;     import android.app.Activity; import android.content.Intent; import android.database.ContentObserver; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.text.TextUtils; import android.text.format.DateUtils; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebSettings.LayoutAlgorithm; import android.webkit.WebSettings.PluginState; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.LinearLayout; import android.widget.ScrollView; import android.widget.TextView; import android.widget.Toast;     public class WhatsOnFragment extends Fragment implements LoaderCallbacks<Cursor> {   private static final String TAG="WhatsOnFragment";   private OnItemSelectedListener mParentOnImageSelectedListener;       private Handler mHandler = new Handler();   private TextView mCountdownTextView; private ViewGroup mRootView; private Cursor mAnnouncementsCursor; private LayoutInflater mInflater; private int mTitleCol = -1; private int mDateCol = -1; private int mUrlCol = -1;   //**********************************************''   /** Column index for _ID */ private static final int COLUMN_ID = 0; /** Column index for title */ private static final int COLUMN_TITLE = 1; /** Column index for link */ private static final int COLUMN_URL_STRING = 2; /** Column index for published */     private static final int COLUMN_IMAG_LINK = 3;   private static final int COLUMN_TEXT_ENTRY = 4; private static final int COLUMN_PUBLISHED = 5;   private static final String[] PROJECTION = new String[]{ FeedContract.Entry._ID, FeedContract.Entry.COLUMN_NAME_TITLE, FeedContract.Entry.COLUMN_NAME_LINK,   FeedContract.Entry.COLUMN_IMAG_LINK, FeedContract.Entry.COLUMN_TEXT_ENTRY, FeedContract.Entry.COLUMN_NAME_PUBLISHED };   public static final int POSITION_KEY = 0; //***********************************************     private static final int ANNOUNCEMENTS_LOADER_ID = 0;       private Uri detailUri;   public static int vpos;   public static WhatsOnFragment newInstance(int pos, Uri detailUri) { WhatsOnFragment frag = new WhatsOnFragment(); Bundle args = new Bundle(); args.putInt("position", POSITION_KEY); args.putParcelable(FeedContract.Entry.CONTENT_ITEM_TYPE, detailUri); frag.setArguments(args); return frag; }       @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.v(TAG, "onAttach");     }         @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mInflater = inflater;       mRootView = (ViewGroup) inflater.inflate(R.layout.content_f, container,false);     refresh();     return mRootView; }     @Override public void onDetach() { super.onDetach(); mHandler.removeCallbacks(mCountdownRunnable); getActivity().getContentResolver().unregisterContentObserver(mObserver); }   private void refresh() { mHandler.removeCallbacks(mCountdownRunnable); mRootView.removeAllViews();       setupDuring(); //getLoaderManager().initLoader(0, null, this); }       private void setupDuring() { // Start background query to load announcements getLoaderManager().initLoader(0, null, this); getActivity().getContentResolver().registerContentObserver( FeedContract.Entry.CONTENT_URI, true, mObserver); }   /**      * Event that updates countdown timer. Posts itself again to      * {@link #mHandler} to continue updating time.      */     private final Runnable mCountdownRunnable = new Runnable() { public void run() {             mHandler.postDelayed(new Runnable() { public void run() {     refresh(); } }, 100); return;   }     };       @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { return new CursorLoader(getActivity(), // Context FeedContract.Entry.CONTENT_URI, // URI PROJECTION, // Projection null, // Selection null, // Selection args // null);   FeedContract.Entry.COLUMN_NAME_PUBLISHED + " desc"); // Sort }   @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { if (getActivity() == null) { return; } if (data != null && data.getCount() > 0) { mTitleCol = data.getColumnIndex(FeedContract.Entry.COLUMN_NAME_TITLE); mDateCol = data.getColumnIndex(FeedContract.Entry.COLUMN_TEXT_ENTRY);     showAnnouncements(data);   } }   @Override public void onLoaderReset(Loader<Cursor> loader) { mAnnouncementsCursor = null; }   /**      * Show the the announcements      */ private void showAnnouncements(Cursor announcements) { mAnnouncementsCursor = announcements;     ViewGroup announcementsRootView = (ViewGroup) mInflater.inflate( R.layout.detail, mRootView, false);   final ViewPager pager = (ViewPager) announcementsRootView.findViewById( R.id.pager);     final PagerAdapter adapter = new AnnouncementsAdapter(); pager.setAdapter(adapter); //pager.setCurrentItem(0);   pager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) {     pager.setCurrentItem(pager.getCurrentItem()); //previousButton.setEnabled(position > 0); //nextButton.setEnabled(position < adapter.getCount() - 1);       }   @Override public void onPageScrollStateChanged(int state) { // TODO Auto-generated method stub   }   @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { // TODO Auto-generated method stub //Toast.makeText(getActivity().getApplicationContext(),"myposition " + position,Toast.LENGTH_LONG).show();   } });     mRootView.removeAllViews(); mRootView.addView(announcementsRootView); }       public class AnnouncementsAdapter extends PagerAdapter {   @Override public Object instantiateItem(ViewGroup pager, int position) {   mAnnouncementsCursor.moveToPosition(position);   View rootView = (View) mInflater.inflate( R.layout.detail_fragment, pager, false); TextView titleView = (TextView) rootView.findViewById(R.id.title); TextView subtitleView = (TextView) rootView.findViewById(R.id.description);     //WebView desc = (WebView) rootView.findViewById(R.id.desc);   // Enable the vertical fading edge (by default it is disabled) ScrollView sv = (ScrollView) rootView.findViewById(R.id.sv); sv.setVerticalFadingEdgeEnabled(true);   // Set webview properties //WebSettings ws = desc.getSettings(); //ws.setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN); //ws.setLightTouchEnabled(false); //ws.setPluginState(PluginState.ON); //ws.setJavaScriptEnabled(true);     titleView.setText(mAnnouncementsCursor.getString(mTitleCol)); subtitleView.setText(mAnnouncementsCursor.getString(mDateCol));   //desc.loadDataWithBaseURL("http://.../",mAnnouncementsCursor.getString(mDateCol), "text/html", "UTF-8", null);     pager.addView(rootView, 0); return rootView; }       @Override public void destroyItem(ViewGroup pager, int position, Object view) { pager.removeView((View) view); }   @Override public int getCount() { return mAnnouncementsCursor.getCount(); }   @Override public boolean isViewFromObject(View view, Object object) { return view.equals(object); }   @Override public int getItemPosition(Object object) {   return POSITION_NONE;       } }   private final ContentObserver mObserver = new ContentObserver(new Handler()) { @Override public void onChange(boolean selfChange) { if (getActivity() == null) { return; }   Loader<Cursor> loader = getLoaderManager().getLoader(ANNOUNCEMENTS_LOADER_ID); if (loader != null) { loader.forceLoad(); } } };           }

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Salut,

Qu'est ce que tu n'arrives pas à faire exactement ?

Récupérer la position ou bien la transmettre à l'autre Fragment ?

normalement avec le putint dans le listfragment ca doit mettre la position dans la variable POSITION_KEY

la line dans l evenement click sur listview

Code:

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1 2	WhatsOnFragment.newInstance(position, detailUri);

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puis passer l argument ici

Code:

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public static WhatsOnFragment newInstance(int position,int cmp, Uri detailUri) { WhatsOnFragment frag = new WhatsOnFragment();   Bundle args = new Bundle();   args.putInt(WhatsOnFragment.POSITION_KEY, position); frag.setArguments(args); return frag; }

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mais comment la recuperer et ou la mettre dans le fragment viewpager WhatsOnFragment ?

Pour le récupérer le bundle depuis ton fragment getArguments(). Tu auras tes données dans ce bundle.

Pour mettre l'info c'est ce que tu as fait

Code:

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frag.setArguments(args);

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Après pour discuter entre ton activity et ton fragment


activity --> fragment , normalement tu as accès au fragment depuis le fragment manager donc pas de souci pour accéder au fragment

fragment --> activity, soit tu passes par le getActivity et tu le cast pour avoir accès à l'activity parente, soit tu crées un listener entre les deux ce qui est plus propre.

effectivement mais il y a une error quelque part quand l essai de recuperer l argument dans

Code:

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@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);   vpos = savedInstanceState.getInt(POSITION_KEY,0);   Bundle extras = getArguments(); //vpos = extras.getInt(POSITION_KEY,0);   this.detailUri = (savedInstanceState == null) ? null : (Uri) savedInstanceState .getParcelable(FeedContract.Entry.CONTENT_ITEM_TYPE);   //Bundle extras = getArguments(); if (extras != null && this.detailUri == null) {   this.detailUri = extras .getParcelable(FeedContract.Entry.CONTENT_ITEM_TYPE); } }

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du fragment viewpager


logcat

Code:

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03-04 13:40:28.367: E/AndroidRuntime(25135): FATAL EXCEPTION: main 03-04 13:40:28.367: E/AndroidRuntime(25135): java.lang.NullPointerException 03-04 13:40:28.367: E/AndroidRuntime(25135): at app.oc.gov.ma.WhatsOnFragment.onCreate(WhatsOnFragment.java:115) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.Fragment.performCreate(Fragment.java:1477) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:893) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.os.Handler.handleCallback(Handler.java:615) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.os.Handler.dispatchMessage(Handler.java:92) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.os.Looper.loop(Looper.java:213) 03-04 13:40:28.367: E/AndroidRuntime(25135): at android.app.ActivityThread.main(ActivityThread.java:4787) 03-04 13:40:28.367: E/AndroidRuntime(25135): at java.lang.reflect.Method.invokeNative(Native Method) 03-04 13:40:28.367: E/AndroidRuntime(25135): at java.lang.reflect.Method.invoke(Method.java:511) 03-04 13:40:28.367: E/AndroidRuntime(25135): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 03-04 13:40:28.367: E/AndroidRuntime(25135): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 03-04 13:40:28.367: E/AndroidRuntime(25135): at dalvik.system.NativeStart.main(Native Method)

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Comme cela plutôt :

Code:

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Bundle extras = getArguments(); if (extras != null) { vpos = extras.getInt(POSITION_KEY,0); }

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oui ca passe, mais comment fair un bind pour la position parceque la je recoi tout le feeds sur le viewpager et moi je veux me pesitionner sur l enregistrement que je click sur la listview

j ai fais un test de la nouvelle position dans

Code:

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public Object getItemPosition(int position) {     if (vpos > 0 && vpos < mAnnouncementsCursor.getCount() - 1) {     return mAnnouncementsCursor.moveToPosition(position);     } else {     }   return POSITION_NONE; }

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je veux me positioner sur le clickable item puis apres me deplacer sur le reste des item sur le viewpager

ou je peux changer la position du cursor de depart ??
mAnnouncementsCursor.moveToPosition(vpos); ??

je suis totalement perdu

Ben il te faut appeler l'activity parente pour lui notifier du changement (via un listener par exemple) et celle ci va appeler chaque fragment pour se remettre à jour.

merci bcp tes explications m'on ben aider