android notifydatasetchange() не работает

Question

У меня есть ошибка на notifydatasetchanged(). Может ли кто-нибудь дать мне правильное решение?

Я пробовал все возможные случаи, но я не нахожу решение.

Я приложил notifydatasetchanged() как adapter.notifydatasetchanged(), но он вообще не работает, и если даю это: oncreate(null), он показывает ошибку в MainActivity.

Мой doInBackground метод:

protected Void doInBackground(Void... voids) { 
     if (phones != null) { 
      Log.e("count", "" + phones.getCount()); 
      if (phones.getCount() == 0) { 
       Log.d("No Contacts", "No Contacts"); 
      } 

      while (phones.moveToNext()) { 
       Bitmap bit_thumb = null; 
       String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); 
       String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); 
       String image_thumb = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.PHOTO_URI)); 
       try { 
        if (image_thumb == null) { 
         //bit_thumb = MediaStore.Images.Media.getBitmap(resolver, Uri.parse(image_thumb)); 
        } else { 
         bit_thumb = MediaStore.Images.Media.getBitmap(resolver, Uri.parse(image_thumb)); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

       SelectUser selectUser = new SelectUser(); 
       selectUser.setThumb(bit_thumb); 
       selectUser.setName(name); 
       selectUser.setPhone(phoneNumber); 
       selectUser.setCheckedBox(); 
       selectUsers.add(selectUser); 
      } 
     } else { 
      Log.e("Cursor close 1", "----------------"); 
     } 
     //phones.close(); 
     return null; 
    } 

protected void onPostExecute(Void aVoid) { 
    super.onPostExecute(aVoid); 

    adapter = new SelectUserAdapter(selectUsers, MainActivity.this); 
    listView.setAdapter(adapter); 
    adapter.notifyDataSetChanged(); 
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @TargetApi(Build.VERSION_CODES.LOLLIPOP) 
      @Override 
      public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) { 
       synchronized (MainActivity.this) { 
        if (firstClickTime == 0) { 
         firstClickTime = SystemClock.elapsedRealtime(); 
         nonDoubleClick = true; 
        } else { 
         long deltaTime = SystemClock.elapsedRealtime() - firstClickTime; 
         firstClickTime = 0; 
         if (deltaTime < DOUBLE_CLICK_TIMEOUT) { 
          nonDoubleClick = false; 
          this.onItemDoubleClick(adapterView, view, position, l); 
          return; 
         } 
        } 

        view.postDelayed(new Runnable() { 
         @Override 
         public void run() { 
          if (nonDoubleClick) { 
           Log.d("Single click", "single click"); 
          } 
         } 

        }, DOUBLE_CLICK_TIMEOUT); 
       } 
      } 

      public void onItemDoubleClick(AdapterView<?> parent, View view, int position, long id) { 
       String selected = ((TextView) view.findViewById(com.jamol.contacts.R.id.no)).getText().toString(); 
       try { 
        mediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.call); 
        mediaPlayer.setVolume(1.0f, 1.0f); 
        mediaPlayer.setLooping(false); 
        mediaPlayer.start(); 
        Vibrator v = (Vibrator) MainActivity.this.getSystemService(Context.VIBRATOR_SERVICE); 
        v.vibrate(500); 
        Intent in = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + selected)); 
        startActivity(in); 
       } catch (SecurityException e) { 
        Log.e("PERMISSION_EXCEPTION", "PERMISSION_NOT_GRANTED"); 
       } 
      } 
    }); 

    listView.setFastScrollEnabled(true); 
} 

И адаптер:

public SelectUserAdapter(List<SelectUser> selectUsers, Context context) { 
    _data = selectUsers; 
    _c = context; 
    this.arraylist = new ArrayList<>(); 
    this.arraylist.addAll(_data); 
} 

@Override 
public int getCount() { 
    return _data.size(); 
} 

@Override 
public Object getItem(int i) { 
    return _data.get(i); 
} 

@Override 
public long getItemId(int i) { 
    return i; 
} 

@SuppressLint("InflateParams") 
@TargetApi(Build.VERSION_CODES.LOLLIPOP) 
@Override 
public View getView(int i, View convertView, ViewGroup viewGroup) { 
    View view = convertView; 
    if (view == null) { 
     LayoutInflater li = (LayoutInflater) _c.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     view = li.inflate(com.jamol.contacts.R.layout.contact_info, null); 
    } else { 
     view = convertView; 
    } 

    ViewHolder v = new ViewHolder(); 

    v.title = (TextView) view.findViewById(com.jamol.contacts.R.id.name); 
    v.check = (CheckBox) view.findViewById(com.jamol.contacts.R.id.check); 
    v.setPhone((TextView) view.findViewById(com.jamol.contacts.R.id.no)); 
    v.imageView = (ImageView) view.findViewById(com.jamol.contacts.R.id.pic); 

    final SelectUser data = _data.get(i); 
    v.title.setText(data.getName()); 
    v.check.setChecked(data.getCheckedBox()); 
    v.getPhone().setText(data.getPhone()); 

    try { 

     if (data.getThumb() != null) { 
      v.imageView.setImageBitmap(data.getThumb()); 
     } else { 
      v.imageView.setImageResource(com.jamol.contacts.R.drawable.ic_user); 
     } 
    } catch (OutOfMemoryError e) { 
     v.imageView.setImageDrawable(this._c.getDrawable(com.jamol.contacts.R.drawable.ic_user)); 
     e.printStackTrace(); 
    } 
    view.setTag(data); 
    return view; 
} 


public void filter(String charText) { 
    if (charText != null) { 
     charText = charText.toLowerCase(Locale.getDefault()); 
     _data.clear(); 
     if (charText.length() == 0) { 
      _data.addAll(arraylist); 
     } else { 
      for (SelectUser wp : arraylist) 
       if (wp.getName().toLowerCase(Locale.getDefault()) 
         .contains(charText)) { 
        _data.add(wp); 
       } 
     } 
    } 

} 

static class ViewHolder { 
    ImageView imageView; 
    TextView title; 
    CheckBox check; 
    private TextView phone; 

    public TextView getPhone() { 
     return phone; 
    } 

    public void setPhone(TextView phone) { 
     this.phone = phone; 
    } 
} 

И это LogCat:

FATAL EXCEPTION: main Process: com.jamol.contacts, PID: 18190 java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(2131492978, class android.widget.ListView) with Adapter(class com.jamol.contacts.SelectUserAdapter)] 
                     at android.widget.ListView.layoutChildren(ListView.java:1584) 
                     at android.widget.AbsListView.onLayout(AbsListView.java:2645) 
                     at android.view.View.layout(View.java:16939) 
                     at android.view.ViewGroup.layout(ViewGroup.java:5409) 
                     at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1077) 
                     at android.view.View.layout(View.java:16939) 
                     at android.view.ViewGroup.layout(ViewGroup.java:5409) 
                     at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) 
                     at android.widget.FrameLayout.onLayout(FrameLayout.java:514) 
                     at android.view.View.layout(View.java:16939) 
                     at android.view.ViewGroup.layout(ViewGroup.java:5409) 
                     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1702) 

Answer 1

Не делайте этого в деятельности. Переопределить этот метод в адаптере Создайте один метод для получения обновленных значений.

@Override 
public void notifyDataSetChanged() { 
    super.notifyDataSetChanged(); 
} 
    public SelectUserAdapter(List<SelectUser> selectUsers, Context context) { 
_data = selectUsers; 
_c = context; 
updateResults(selectUsers); 
} 

public void updateResults(List<SelectUser> results) { 
    userList = results;//List<SelectUser> userList 
    notifyDataSetChanged(); 
}