Getting contacts in Android is very slow

Question

I wrote a code to get the contact name, phone number and image from Contacts and display it on the list in Android. It works fine, but takes longer to load. I tried using multithreading in some parts of the code. But the loading time does not decrease.

Here is the onCreate() method:

 protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lvDetail = (ListView) findViewById(R.id.listView1); fetchcontacts(); lvDetail.setAdapter(new MyBaseAdapter(context, myList)); } 

Here is the code for extracting contacts:

  private void fetchcontacts() { // TODO Auto-generated method stub Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, ContactsContract.Contacts.DISPLAY_NAME + " ASC"); int count = cursor.getCount(); if (count > 0) { Toast.makeText(context, "count >0", Toast.LENGTH_SHORT).show(); while (cursor.moveToNext()) { String columnId = ContactsContract.Contacts._ID; int cursorIndex = cursor.getColumnIndex(columnId); String id = cursor.getString(cursorIndex); name = cursor.getString(cursor .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); Toast.makeText(context, "Toast 1", Toast.LENGTH_SHORT).show(); int numCount = Integer.parseInt(cursor.getString(cursor .getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))); if (numCount > 0) { Toast.makeText(context, "Toast 2", Toast.LENGTH_SHORT).show(); Cursor phoneCursor = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null, CommonDataKinds.Phone.CONTACT_ID+" = ?", new String[] { id }, ContactsContract.Contacts.DISPLAY_NAME + " ASC"); while (phoneCursor.moveToNext()) { Toast.makeText(context, "Toast 3", Toast.LENGTH_SHORT).show(); phoneNo = phoneCursor.getString(phoneCursor .getColumnIndex(ContactsContract.CommonDataKinds. Phone.NUMBER)); String image_uri = phoneCursor .getString(phoneCursor .getColumnIndex(ContactsContract.CommonDataKinds.Phone.PHOTO_URI)); if (image_uri != null) { Toast.makeText(context, "Toast 4", Toast.LENGTH_SHORT).show(); System.out.println(Uri.parse(image_uri)); try { bitmap = MediaStore.Images.Media .getBitmap(this.getContentResolver(), Uri.parse(image_uri)); // sb.append("\n Image in Bitmap:" + bitmap); // System.out.println(bitmap); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } Toast.makeText(context, name, Toast.LENGTH_SHORT).show(); getDataInList(name,phoneNo,bitmap); name=null; phoneNo=null; Drawable myDrawable = getResources().getDrawable(R.drawable.star1); bitmap = ((BitmapDrawable) myDrawable).getBitmap(); } phoneCursor.close(); } } } 

Here, the setAdapter () function in listview works after retrieving all the contacts in an ArrayList. Does anyone have an idea on how to display contacts while extracting contacts? any sample code?

Answer 1

1. Consider the Columns from Cursor that you only need. According to your requirement, you just need _ID, HAS_PHONE_NUMBER, DISPLAY_NAME , so change the cursor reading

 Cursor cursor = getContentResolver().query( ContactsContract.Contacts.CONTENT_URI, new String[] { ContactsContract.Contacts._ID, ContactsContract.Contacts.HAS_PHONE_NUMBER, ContactsContract.Contacts.DISPLAY_NAME }, null, null, ContactsContract.Contacts.DISPLAY_NAME + " ASC"); 

2. Do not execute the time process in the user interface thread. Use AsyncTask instead

Note These two steps will be eliminated to some extent ... but not completely

Answer 2

Contacts in dimensional use are used in the background task. Uri uri = Uri.withAppendedPath (ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode (number [i]));

  ContentResolver contentResolver = getContentResolver(); Cursor search = contentResolver.query(uri, new String[]{ContactsContract.PhoneLookup._ID, ContactsContract.PhoneLookup.DISPLAY_NAME}, null, null, null); try { if (search != null && search.getCount() > 0) { search.moveToNext(); name = search.getString(search.getColumnIndex(ContactsContract.Data.DISPLAY_NAME)); id = search.getString(search.getColumnIndex(ContactsContract.Data._ID)); System.out.println("name" + name + "id" + id); /* tv_name.setText(name); tv_id.setText(id); tv_phone.setText(number);*/ } } finally { if (search != null) { search.close(); } } 

Answer 3

The fastest way for me is very far.

 ContentResolver cr = mContext.getContentResolver(); Cursor cursor= mContext.getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, PROJECTION, "HAS_PHONE_NUMBER <> 0", null, null); if (cursor!= null) { final int displayNameIndex = cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME); final int numberIndex = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER); final int idIndex= cursor.getColumnIndex(ContactsContract.Contacts._ID); String displayName, number = null, idValue; while (cursor.moveToNext()) { displayName = cursor.getString(displayNameIndex); idValue= cursor.getString(idIndex); Cursor phones = mContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, "contact_id = '" + idValue + "'", null, null); phones.moveToFirst(); try { number = phones.getString(phones.getColumnIndex("data1")); } catch (CursorIndexOutOfBoundsException e) {` } phones.close(); userList.add(new ContactModel(displayName , number , null , } 

Answer 4

I did this by reducing the re-request, which is expensive. The best of my solution is that this method detected all mobile phones and email for each contact and inserted a list for each contact value. It's fast like a storm now :)

 //contact entity public class MobileContact { public String name; public String contact; public Type type; public MobileContact(String contact, Type type) { name = ""; this.contact = contact; this.type = type; } public MobileContact(String name, String contact, Type type) { this.name = name; this.contact = contact; this.type = type; } public enum Type { EMAIL, PHONE } @Override public String toString() { return "MobileContact{" + "name='" + name + '\'' + ", contact='" + contact + '\'' + ", type=" + type + '}'; } } // method for collect contacts public List<MobileContact> getAllContacts() { log.debug("get all contacts"); List<MobileContact> mobileContacts = new ArrayList<>(); ContentResolver contentResolver = context.getContentResolver(); // add all mobiles contact Cursor phonesCursor = contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, new String[]{ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.CONTACT_ID}, null, null, null); while (phonesCursor != null && phonesCursor.moveToNext()) { String contactId = phonesCursor.getString(phonesCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID)); String phoneNumber = phonesCursor.getString(phonesCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)).replace(" ", ""); mobileContacts.add(new MobileContact(contactId, phoneNumber, MobileContact.Type.PHONE)); } if (phonesCursor != null) { phonesCursor.close(); } // add all email contact Cursor emailCursor = contentResolver.query(ContactsContract.CommonDataKinds.Email.CONTENT_URI, new String[]{ContactsContract.CommonDataKinds.Email.DATA, ContactsContract.CommonDataKinds.Email.CONTACT_ID}, null, null, null); while (emailCursor != null && emailCursor.moveToNext()) { String contactId = emailCursor.getString(emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.CONTACT_ID)); String email = emailCursor.getString(emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA)); mobileContacts.add(new MobileContact(contactId, email, MobileContact.Type.EMAIL)); } if (emailCursor != null) { emailCursor.close(); } // get contact name map Map<String, String> contactMap = new HashMap<>(); Cursor contactsCursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, new String[]{ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME, ContactsContract.Contacts.HAS_PHONE_NUMBER}, null, null, ContactsContract.Contacts.DISPLAY_NAME); while (contactsCursor != null && contactsCursor.moveToNext()) { String contactId = contactsCursor.getString(contactsCursor.getColumnIndex(ContactsContract.Contacts._ID)); String contactName = contactsCursor.getString(contactsCursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); contactMap.put(contactId, contactName); } if (phonesCursor != null) { phonesCursor.close(); } // replace contactId to display name for (MobileContact mobileContact : mobileContacts) { String displayName = contactMap.get(mobileContact.name); mobileContact.name = displayName != null ? displayName : ""; } // sort list by name Collections.sort(mobileContacts, new Comparator<MobileContact>() { @Override public int compare(MobileContact c1, MobileContact c2) { return c1.name.compareTo(c2.name); } }); return mobileContacts; }