I have a custom list which has objects of class with name and phone number.. Now the problem is that there are too many duplicates . I need to remove all duplicates based on phone number.
When i tried this approach :
list = getContacts();
list = new ArrayList<ModelContact>(new LinkedHashSet<ModelContact>(list));
listView.setAdapter(new ContactsAdapter(this, list));
ModelContact.java
public class ModelContact {
private String name;
private String ContactNumber;
private Bitmap imageUri;
private String _id;
public ModelContact() {
}
public Bitmap getImageUri() {
return imageUri;
}
public void setImageUri(Bitmap imageUri) {
this.imageUri = imageUri;
}
public String get_id() {
return _id;
}
public void set_id(String _id) {
this._id = _id;
}
public String getContactNumber() {
return ContactNumber;
}
public void setContactNumber(String contactNumber) {
ContactNumber = contactNumber;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public boolean equals(Object obj) {
// TODO Auto-generated method stub
if (obj instanceof ModelContact) {
ModelContact temp = (ModelContact) obj;
if (this.ContactNumber == temp.ContactNumber)
return true;
}
return false;
}
@Override
public int hashCode() {
// TODO Auto-generated method stub
return (this.ContactNumber.hashCode());
}
}
ContactsList:
public class ContactsList extends ActionBarActivity {
private ListView listView;
ProgressBar progressBar;
List<ModelContact> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_contacts);
listView = (ListView) findViewById(R.id.contacts_list);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
list = new ArrayList<>();
list = getContacts();
list = new ArrayList<ModelContact>(new LinkedHashSet<ModelContact>(list));
listView.setAdapter(new ContactsAdapter(this, list));
}
private List<ModelContact> getContacts() {
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
null, null, null, null);
List<ModelContact> modelContacts = new ArrayList<>();
if (cur.getCount() > 0) {
ModelContact obj = new ModelContact();
while (cur.moveToNext()) {
String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
if (Integer.parseInt(cur.getString(
cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
new String[]{id}, null);
while (pCur.moveToNext()) {
String phoneNo = pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
Bitmap bmp = retrieveContactPhoto(id);
if (bmp == null) {
System.out.println(name + "is \t null");
} else {
Toast.makeText(this, "not null \t" + phoneNo, Toast.LENGTH_SHORT).show();
}
String imagecon = pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
obj.set_id(id);
obj.setName(name);
obj.setContactNumber(phoneNo);
obj.setImageUri(bmp);
modelContacts.add(obj);
System.out.println("Name: " + name + ", Phone No: " + phoneNo);
//Toast.makeText(NativeContentProvider.this, "Name: " + name + ", Phone No: " + phoneNo, Toast.LENGTH_SHORT).show();
}
pCur.close();
}
}
}
System.out.print("Size:::" + modelContacts.size());
return modelContacts;
}
private Bitmap retrieveContactPhoto(String contactID) {
Bitmap photo = null;
try {
InputStream inputStream = ContactsContract.Contacts.openContactPhotoInputStream(getContentResolver(),
ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, new Long(contactID)));
if (inputStream != null) {
photo = BitmapFactory.decodeStream(inputStream);
return photo;
}
if (inputStream != null)
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
return null;
}
}
