I have used a rough way to avoid this problem which helped me so much and working nicely.
i.e
Use local database (SQLite) to avoid duplicate data by make phone number to unique.
I have made one SQLite DB to handle this problem:
ContactMerger.java:
public class ContactMerger {
private static final String CONTACT_TABLE = "_contact_table";
private static final String CONTACT_ID = "_contactId";
private static final String CONTACT_NAME = "_contactName";
private static final String CONTACT_MOBILE_NUMBER = "_contactNumber";
private static final String CONTACT_DATE = "_contactDate";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "DB_Contact";
private final Context context;
private SQLiteDatabase ourDatabase;
private DbHelper ourHelper;
private class DbHelper extends SQLiteOpenHelper {
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
String contactQuery = "CREATE TABLE " + CONTACT_TABLE + " ("
+ CONTACT_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ CONTACT_NAME + " TEXT NOT NULL, " + CONTACT_DATE
+ " TEXT NOT NULL, " + CONTACT_MOBILE_NUMBER
+ " TEXT NOT NULL UNIQUE);";
db.execSQL(contactQuery);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + CONTACT_TABLE);
onCreate(db);
}
}
public ContactMerger(Context context) {
this.context = context;
}
public ContactMerger open() throws SQLException {
ourHelper = new DbHelper(context);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close() {
ourHelper.close();
}
// Insert Data to Contact Table
public long insertContacts(String name, String number, String date) throws SQLException {
ContentValues cv = new ContentValues();
cv.put(CONTACT_NAME, name);
cv.put(CONTACT_DATE, date);
cv.put(CONTACT_MOBILE_NUMBER, number);
Log.d("Insert Data", cv.toString());
return ourDatabase.insert(CONTACT_TABLE, null, cv);
}
//Get Contact details from Contact Table
public ArrayList<ContactHolder> getContactDetails() throws Exception{
ArrayList<ContactHolder> contactDetails = new ArrayList<ContactHolder>();
String[] columns = new String[] { CONTACT_ID, CONTACT_NAME, CONTACT_DATE, CONTACT_MOBILE_NUMBER };
Cursor c = ourDatabase.query(CONTACT_TABLE, columns, null, null, null,null, null);
int iContactName = c.getColumnIndex(CONTACT_NAME);
int iContactDate = c.getColumnIndex(CONTACT_DATE);
int iContactMobileNumber = c.getColumnIndex(CONTACT_MOBILE_NUMBER);
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
ContactHolder data = new ContactHolder();
data.setName(c.getString(iContactName));
data.setDate(c.getString(iContactDate));
data.setNumber(c.getString(iContactMobileNumber));
contactDetails.add(data);
}
return contactDetails;
}
}
Here ContactHolder is just a getter/setter class to handle contact entities.
First I inserted all Contact information once in my MainActivity by the help of a background thread. It prevents to insert the contact info multiple times.
Something like:
private ArrayList<ContactHolder> contactHolder;
private void setCallLogs(Cursor managedCursor) {
contactHolder = new ArrayList<ContactHolder>();
int _number = managedCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int _name = managedCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
int _id = managedCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone._ID);
while (managedCursor.moveToNext()) {
ContactHolder holder = new ContactHolder();
holder.setNumber(managedCursor.getString(_number));
holder.setName(managedCursor.getString(_name));
holder.setDate(managedCursor.getString(_id));
contactHolder.add(holder);
}
Thread t = new Thread(new Runnable() {
@Override
public void run() {
for(int i=0; i<contactHolder.size(); i++){
try{
ContactMerger merger = new ContactMerger(HomeActivity.this);
merger.open();
merger.insertContacts(contactHolder.get(i).getName(),
contactHolder.get(i).getNumber(),
contactHolder.get(i).getdate());
merger.close();
} catch(Exception e){
e.printStackTrace();
}
}
}
});
t.start();
}
At last I gtt all contact information inside an Asynctask(doInbackground()) and put in adapter/listview in its onPostExecute() method in the class I want to show.
Here:
@Override
protected ArrayList<ContactHolder> doInBackground(String... parameters) {
ArrayList<ContactHolder> filterContacts = new ArrayList<ContactHolder>();
ContactMerger merger = new ContactMerger(Aaja_Contact.this);
merger.open();
try {
filterContacts = merger.getContactDetails();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
merger.close();
return filterContacts;
}
