Android - Ajout de la barre de recherche à la liste personnalisée et à l'adaptateur simple

Question

J'ai essayé de créer un ListView personnalisé & en remplissant les valeurs en utilisant Array de HashMap s. Interface utilisateur montre bien:

Mais chaque fois tapé quelque chose dans la recherche-box, app se ferme en disant Unfortunately app is stopped.

J'ai beaucoup cherché, mais je n'arrive pas à le faire.

Peut-être la méthode que j'ai essayé d'appliquer un filtre est-elle incorrecte?

Voici le code:

public class MyCustomListView extends ListActivity { 
    SimpleAdapter adapter; 
    EditText inputSearch; 

    static final ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>(); 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.custom_list_view); 
     inputSearch = (EditText) findViewById(R.id.search); 

     ImageView si = (ImageView) findViewById(R.id.search_icon); 
     si.setImageResource(R.drawable.blue_search); 

     adapter = new SimpleAdapter(
       this, 
       list, 
       R.layout.custom_row_view, 
       new String[] {"img","name","dob","anniversary"}, 
       new int[] {R.id.image,R.id.text1,R.id.text2, R.id.text3} 
     ); 

     try{ 
      getItemFromXMLandPopulateList(this); // gets the complete list 
     } catch (Exception e){ 
      Toast.makeText(this, "Error:\n" + e, Toast.LENGTH_LONG).show(); 
     } 

     setListAdapter(adapter); 

     // Capture Text in EditText 
     inputSearch.addTextChangedListener(new TextWatcher() { 
      @Override 
      public void onTextChanged(CharSequence s, int start, int before, int count) { 
       adapter.getFilter().filter(s); 
      } 

      @Override 
      public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
      } 

      @Override 
      public void afterTextChanged(Editable s) { 
      } 
     }); 
    } 

    private void getItemFromXMLandPopulateList(Activity activity) throws XmlPullParserException, IOException { 
     Resources res = activity.getResources(); 
     XmlResourceParser xpp = res.getXml(R.xml.db); 
     String id=null, name=null, dob=null, anniversary=null; 
     xpp.next(); 
     int eventType = xpp.getEventType(); 

     while (eventType != XmlPullParser.END_DOCUMENT){ 
      switch(eventType){ 
       case XmlPullParser.START_TAG: 
        String tagname = xpp.getName(); 
        if(tagname.equals("ID")){ 
         eventType = xpp.next(); 
         if (eventType == XmlPullParser.TEXT) { 
          id = xpp.getText(); 
         } 
        } else if(tagname.equals("Name")){ 
         eventType = xpp.next(); 
         if (eventType == XmlPullParser.TEXT) { 
          name = xpp.getText(); 
         } 
        } else if(tagname.equals("DOB")){ 
         eventType = xpp.next(); 
         if (eventType == XmlPullParser.TEXT) { 
          dob = xpp.getText(); 
         } 
        } else if(tagname.equals("Anniversary")){ 
         eventType = xpp.next(); 
         if (eventType == XmlPullParser.TEXT) { 
          anniversary = xpp.getText(); 
         } 
        } 
        break; 
       case XmlPullParser.END_TAG: 
        if(xpp.getName().equals("F")){ 
         // Adding 3 value hash to array-list 
         HashMap<String,String> temp = new HashMap<String,String>(); 
         temp.put("img", Integer.toString(R.mipmap.profile)); 
         temp.put("id", id); 
         temp.put("name", name); 
         temp.put("dob", dob); 
         temp.put("anniversary", anniversary); 
         list.add(temp); 
         // Clearing values for next set 
         id=""; name = ""; dob = ""; anniversary = ""; 
        } 
        break; 
       default: 
        break; 
      } 
      eventType = xpp.next(); 
     } 
    } 

    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 
     HashMap<String, String> item = (HashMap<String, String>) getListAdapter().getItem(position); 
     String xmlFile = "r" + item.get("id"); 
     String name = item.get("name"); 
     //Toast.makeText(this, "Showing details of: " + name, Toast.LENGTH_LONG).show(); 

     Intent intent = new Intent(this, ShowDetails.class); 
     intent.putExtra("xml", xmlFile); 
     startActivity(intent); 
    } 
} 

journal Crash ci-dessous collé, semble dire NullPointerException, mais ne savez pas comment résoudre.

I/ActivityManager(1596): Displayed com.karthikhiraskar.samplesqlitedb/.MyCustomListView: +237ms 
W/Filter (10785): An exception occured during performFiltering()! 
W/Filter (10785): java.lang.NullPointerException 
W/Filter (10785): at android.widget.SimpleAdapter$SimpleFilter.performFiltering(SimpleAdapter.java:354) 
W/Filter (10785): at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
W/Filter (10785): at android.os.Handler.dispatchMessage(Handler.java:102) 
W/Filter (10785): at android.os.Looper.loop(Looper.java:136) 
W/Filter (10785): at android.os.HandlerThread.run(HandlerThread.java:61) 
I/LatinIME:LogUtils(1692): Dictionary info: dictionary = contacts.en_US.dict ; version = ? ; date = ? 
D/AndroidRuntime(10785): Shutting down VM 
W/dalvikvm(10785): threadid=1: thread exiting with uncaught exception (group=0xacd4eb20) 
E/AndroidRuntime(10785): FATAL EXCEPTION: main 
E/AndroidRuntime(10785): Process: com.karthikhiraskar.samplesqlitedb, PID: 10785 
E/AndroidRuntime(10785): java.lang.NullPointerException 
E/AndroidRuntime(10785): at android.widget.SimpleAdapter.getCount(SimpleAdapter.java:93) 
E/AndroidRuntime(10785): at android.widget.AdapterView.checkFocus(AdapterView.java:713) 
E/AndroidRuntime(10785): at android.widget.AdapterView$AdapterDataSetObserver.onInvalidated(AdapterView.java:836) 
E/AndroidRuntime(10785): at android.widget.AbsListView$AdapterDataSetObserver.onInvalidated(AbsListView.java:6288) 
E/AndroidRuntime(10785): at android.database.DataSetObservable.notifyInvalidated(DataSetObservable.java:50) 
E/AndroidRuntime(10785): at android.widget.BaseAdapter.notifyDataSetInvalidated(BaseAdapter.java:59) 
E/AndroidRuntime(10785): at android.widget.SimpleAdapter$SimpleFilter.publishResults(SimpleAdapter.java:383) 
E/AndroidRuntime(10785): at android.widget.Filter$ResultsHandler.handleMessage(Filter.java:282) 
E/AndroidRuntime(10785): at android.os.Handler.dispatchMessage(Handler.java:102) 
E/AndroidRuntime(10785): at android.os.Looper.loop(Looper.java:136) 
E/AndroidRuntime(10785): at android.app.ActivityThread.main(ActivityThread.java:5017) 
E/AndroidRuntime(10785): at java.lang.reflect.Method.invokeNative(Native Method) 
E/AndroidRuntime(10785): at java.lang.reflect.Method.invoke(Method.java:515) 
E/AndroidRuntime(10785): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
E/AndroidRuntime(10785): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
E/AndroidRuntime(10785): at dalvik.system.NativeStart.main(Native Method) 
W/ActivityManager(1596): Force finishing activity com.karthikhiraskar.samplesqlitedb/.MyCustomListView 
D/dalvikvm(1596): GC_FOR_ALLOC freed 505K, 21% free 9295K/11692K, paused 7ms, total 7ms 
W/ActivityManager(1596): Activity pause timeout for ActivityRecord{ad45ab60 u0 com.karthikhiraskar.samplesqlitedb/.MyCustomListView t59 f} 
E/SoundPool(1596): error loading /system/media/audio/ui/Effect_Tick.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/Effect_Tick.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/Effect_Tick.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/Effect_Tick.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/Effect_Tick.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/KeypressStandard.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/KeypressSpacebar.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/KeypressDelete.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg 
E/SoundPool(1596): error loading /system/media/audio/ui/KeypressReturn.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg 
I/Process (10785): Sending signal. PID: 10785 SIG: 9 
E/SoundPool(1596): error loading /system/media/audio/ui/KeypressInvalid.ogg 
W/AudioService(1596): Soundpool could not load file: /system/media/audio/ui/KeypressInvalid.ogg 
W/AudioService(1596): onLoadSoundEffects(), Error -1 while loading samples 
W/InputDispatcher(1596): channel 'ad54e4b0 com.karthikhiraskar.samplesqlitedb/com.karthikhiraskar.samplesqlitedb.MyCustomListView (server)' ~ Consumer closed input channel or an error occurred. events=0x9 
E/InputDispatcher(1596): channel 'ad54e4b0 com.karthikhiraskar.samplesqlitedb/com.karthikhiraskar.samplesqlitedb.MyCustomListView (server)' ~ Channel is unrecoverably broken and will be disposed! 
I/ActivityManager(1596): Process com.karthikhiraskar.samplesqlitedb (pid 10785) has died. 
W/InputDispatcher(1596): Attempted to unregister already unregistered input channel 'ad54e4b0 com.karthikhiraskar.samplesqlitedb/com.karthikhiraskar.samplesqlitedb.MyCustomListView (server)' 
W/Binder (1692): Caught a RuntimeException from the binder stub implementation. 
W/Binder (1692): java.lang.NullPointerException 
W/Binder (1692): at android.inputmethodservice.IInputMethodWrapper.setSessionEnabled(IInputMethodWrapper.java:280) 
W/Binder (1692): at com.android.internal.view.IInputMethod$Stub.onTransact(IInputMethod.java:129) 
W/Binder (1692): at android.os.Binder.execTransact(Binder.java:404) 
W/Binder (1692): at dalvik.system.NativeStart.run(Native Method) 
W/SurfaceFlinger(1162): couldn't log to binary event log: overflow. 
I/WindowState(1596): WIN DEATH: Window{ad54e4b0 u0 com.karthikhiraskar.samplesqlitedb/com.karthikhiraskar.samplesqlitedb.MyCustomListView} 
W/InputMethodManagerService(1596): Got RemoteException sending setActive(false) notification to pid 10785 uid 10060 
W/PlatformStatsUtil(2013): Could not retrieve Usage & Diagnostics setting. Giving up. 

Answer 1

Si vous recherchez quelque chose, vous utiliserez auditeur Textchange, nous utiliserons deux d'une liste de données pour la sauvegarde & autre pour le remplissage en fonction de recherche.

edit_text.addTextChangedListener(new TextWatcher() { 

     @Override 
     public void onTextChanged(CharSequence s, int start, int before, int count) { 
      List<LocationSearchModel> textToCheckList=new ArrayList<>(); 
      String textToCheck=s.toString(); 
      if(s.length()!=0){ 
       //code for making First letter of string CAPITAL 
       textToCheck = textToCheck.substring(0, 1).toUpperCase() + textToCheck.substring(1); 

       //code for filling second list from backup list based on text to search here in this case, it is "textToCheck" 
       for (LocationSearchModel searchModel: locationSearchList) { 
        if(searchModel.getLocationName().startsWith(textToCheck)){ 
         textToCheckList.add(searchModel); 
        } 
       } 
      }else{ 
       textToCheckList.addAll(locationSearchList) ; 
      } 

      // Setting new list to adapter and notifying it 
      locationSearchAdapter.setLocationSearchList(textToCheckList); 
      locationSearchAdapter.notifyDataSetChanged(); 
     } 

    }); 

Dans le cas ci-dessus, « locationSearchList » est ma liste de sauvegarde, à laquelle je vais utiliser pour remplir ma deuxième liste qui est

List<LocationSearchModel> textToCheckList=new ArrayList<>(); 

dans ce cas.

J'ai mentionné les commentaires dans le code ci-dessus, suivez-le et vous atteindrez à solution.and s'il vous plaît marquer ma solution utilisation complète si vraiment trouvé.