Wie kann ich verhindern, dass meine Kontakte zweimal aufgelistet werden?

Question

Ich habe eine Beispiel-App, wo die Kontakte in meinem Android-Handy aufgelistet sind und ich kann nach ihnen suchen. Sehr oft sind die Kontakte jedoch doppelt aufgeführt. Ich möchte nur, dass sie einmal aufgeführt werden. Was sollte ich in meinem Code ändern, um dies zu beheben? Ich habe die relevanten Teile meines Codes unten veröffentlicht.

Ich habe hier how to remove duplicate contacts from arraylist versucht, aber ich konnte den Code nicht ausreichend ändern, um meine Bedürfnisse zu erfüllen.

MainActivity.java

package com.example.chris.contactlistcustomlistview; 

     import android.app.Activity; 
     import android.content.ContentResolver; 
     import android.database.Cursor; 
     import android.graphics.Bitmap; 
     import android.net.Uri; 
     import android.os.AsyncTask; 
     import android.os.Bundle; 
     import android.provider.ContactsContract; 
     import android.provider.MediaStore; 
     import android.util.Log; 
     import android.view.View; 
     import android.widget.AdapterView; 
     import android.widget.ListView; 
     import android.widget.SearchView; 
     import android.widget.Toast; 

     import java.io.IOException; 
     import java.util.ArrayList; 
     import java.util.List; 


public class MainActivity extends Activity { 

    // ArrayList 
    ArrayList<SelectUser> selectUsers; 
    List<SelectUser> temp; 
    // Contact List 
    ListView listView; 

    // Cursor to load contacts list 
    Cursor phones, email; 

    // Pop up 
    ContentResolver resolver; 
    SearchView search; 
    SelectUserAdapter adapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     selectUsers = new ArrayList<SelectUser>(); 
     resolver = this.getContentResolver(); 
     listView = (ListView) findViewById(R.id.contacts_list); 

     phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC"); 
//  retrieves contact information 
     LoadContact loadContact = new LoadContact(); 
     loadContact.execute(); 

//  let's set up our search box, 
     search = (SearchView) findViewById(R.id.searchView); 

     //*** setOnQueryTextListener *** 
     search.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 

      @Override 
      public boolean onQueryTextSubmit(String query) { 
       // TODO Auto-generated method stub 

       return false; 
      } 

      @Override 
      public boolean onQueryTextChange(String newText) { 
       // when the text in searchView changes, call the filter function 
       adapter.filter(newText); 
       return false; 
      } 
     }); 
    } 

    // Load data on background 
    class LoadContact extends AsyncTask<Void, Void, Void> { 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 

     } 

     @Override 
     protected Void doInBackground(Void... voids) { 
      // Get Contact list from Phone 


      if (phones != null) { 
       Log.e("count", "" + phones.getCount()); 
       if (phones.getCount() == 0) { 
        Toast.makeText(MainActivity.this, "No contacts in your contact list.", Toast.LENGTH_LONG).show(); 
       } 

       while (phones.moveToNext()) { 
        Bitmap bit_thumb = null; 
        String id = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID)); 
        String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); 
        String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); 
        String EmailAddr = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA2)); 
        String image_thumb = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.PHOTO_THUMBNAIL_URI)); 
        try { 
         if (image_thumb != null) { 
          bit_thumb = MediaStore.Images.Media.getBitmap(resolver, Uri.parse(image_thumb)); 
         } else { 
          Log.e("No Image Thumb", "--------------"); 
         } 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
//what's happening here? For every user in the phonebook, show an image, the name, number, an id and maybe a checkbox? 
        SelectUser selectUser = new SelectUser(); 
        selectUser.setThumb(bit_thumb); 
        selectUser.setName(name); 
        selectUser.setPhone(phoneNumber); 
        selectUser.setEmail(id); 
        selectUser.setCheckedBox(false); 
        selectUsers.add(selectUser); 
       } 
      } else { 
       Log.e("Cursor close 1", "----------------"); 
      } 
      //phones.close(); 
      return null; 
     } 

     @Override 
//  when DoInBackground is finished, when we have our phone number, name etc... display the results in our listview. 
     protected void onPostExecute(Void aVoid) { 
      super.onPostExecute(aVoid); 
      adapter = new SelectUserAdapter(selectUsers, MainActivity.this); 
      listView.setAdapter(adapter); 

      // Select item on listclick 
      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 

        Log.e("search", "here---------------- listener"); 

        SelectUser data = selectUsers.get(i); 
       } 
      }); 

      listView.setFastScrollEnabled(true); 
     } 
    } 

    @Override 
    protected void onStop() { 
     super.onStop(); 
     phones.close(); 
    } 
} 

SelectUserAdapter.java

package com.example.chris.contactlistcustomlistview; 

     import android.annotation.TargetApi; 
     import android.content.Context; 
     import android.graphics.Bitmap; 
     import android.graphics.BitmapFactory; 
     import android.os.Build; 
     import android.util.Log; 
     import android.view.LayoutInflater; 
     import android.view.View; 
     import android.view.ViewGroup; 
     import android.widget.BaseAdapter; 
     import android.widget.CheckBox; 
     import android.widget.ImageView; 
     import android.widget.TextView; 

     import java.util.ArrayList; 
     import java.util.List; 
     import java.util.Locale; 

/** 
* Created by Chris on 25/03/2016. 
*/ 

public class SelectUserAdapter extends BaseAdapter { 

    public List<SelectUser> _data; 
    private ArrayList<SelectUser> arraylist; 
    Context _c; 
    ViewHolder v; 
// RoundImage roundedImage; 

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

    @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(R.layout.inflate_listview, null); 
      Log.e("Inside", "here--------------------------- In view1"); 
     } else { 
      view = convertView; 
      Log.e("Inside", "here--------------------------- In view2"); 
     } 

//  we are making a cell format in the ListView, which will contain info like 
//  number, name... the layout for this, with name, no, pic etc... 
//  is contained in inflate_listview.xml, which describes how each cell data 
//  loads into the listview 
     v = new ViewHolder(); 

//  So, for example, title is cast to the name id, in activity main, 
//  phone is cast to the id called no etc 
     v.title = (TextView) view.findViewById(R.id.name); 
     v.check = (CheckBox) view.findViewById(R.id.check); 
     v.phone = (TextView) view.findViewById(R.id.no); 
//  v.imageView = (ImageView) view.findViewById(R.id.pic); 

//  for each new cell with title, name, number etc... 
// 
     final SelectUser data = (SelectUser) _data.get(i); 
     v.title.setText(data.getName()); 
     v.check.setChecked(data.getCheckedBox()); 
     v.phone.setText(data.getPhone()); 



     Log.e("Image Thumb", "--------------" + data.getThumb()); 

     view.setTag(data); 
     return view; 
    } 

    // Filter Class 
    public void filter(String charText) { 
     charText = charText.toLowerCase(Locale.getDefault()); 
//  _data is our list of Users, or contacts 
     _data.clear(); 
//  If there is nothing in the searchbox, 
//  then show all the contacts 
     if (charText.length() == 0) { 
      _data.addAll(arraylist); 
//   or else.... 
     } else { 
      for (SelectUser wp : arraylist) { 
//    If a contact's phone number matches the input thus far that the user 
//    is filtering for, then include it in the listview. 
       if (wp.getPhone().toLowerCase(Locale.getDefault()) 
         .contains(charText)) { 
        _data.add(wp); 
       } 
      } 
     } 
     notifyDataSetChanged(); 
    } 
    static class ViewHolder { 
//  In each cell in the listview show a name and phone number 
//  ImageView imageView; 
     TextView title, phone; 
     CheckBox check; 
    } 
} 

Answer 1

public class MainActivity extends Activity { 


    Cursor cursor; 
    ListView mainListView; 
    ArrayList hashMapsArrayList; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     if (cursor != null) { 
      cursor.moveToFirst();} 
     try { 

      cursor = getApplicationContext().getContentResolver() 
        .query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null); 
      int Idx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID); 
      int nameIdx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME); 

      int phoneNumberIdx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER); 
      int photoIdIdx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.PHOTO_THUMBNAIL_URI); 
      cursor.moveToFirst(); 


      Set<String> ids = new HashSet<>(); 
      do { 
       System.out.println("=====>in while"); 
       String contactid=cursor.getString(Idx); 
       if (!ids.contains(contactid)) { 
        ids.add(contactid); 
        HashMap<String, String> hashMap = new HashMap<String, String>(); 
        String name = cursor.getString(nameIdx); 
        String phoneNumber = cursor.getString(phoneNumberIdx); 
        String image = cursor.getString(photoIdIdx); 
        System.out.println("Id--->"+contactid+"Name--->"+name); 
        System.out.println("Id--->"+contactid+"Number--->"+phoneNumber); 

        if (!phoneNumber.contains("*")) { 
         hashMap.put("contactid", "" + contactid); 
         hashMap.put("name", "" + name); 
         hashMap.put("phoneNumber", "" + phoneNumber); 
         hashMap.put("image", "" + image); 
         // hashMap.put("email", ""+email); 
         if (hashMapsArrayList != null) { 
          hashMapsArrayList.add(hashMap);} 
//     hashMapsArrayList.add(hashMap); 
        } 
       } 

      } while (cursor.moveToNext()); 


     } catch (Exception e) { 
      e.printStackTrace(); 
     } finally { 
      if (cursor != null) { 
       cursor.close(); 
      } 
     } 
} 
} 

Answer 2

dies versuchen, ich bin es nicht sicher, ob dieses Problem zu lösen.

if (selectUsers.indexOf(selectUser) == -1) { 
    selectUsers.add(selectUser); 
    }