как добавить контактную информацию с помощью кода в список контактов телефона Android ..?

** Я пробовал этот код. Работает без ошибок. Но после метода createContact я открыл приложение контактов Android. Контакт, который я добавил с помощью createContact , отсутствует. Когда я нажимаю "Показать контакты", он отображается.

На самом деле, в чем проблема? **

если у вас есть другой код, опубликуйте его ...

import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.content.OperationApplicationException;
import android.database.Cursor;

import android.os.Bundle;
import android.os.RemoteException;
import android.provider.ContactsContract;

import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class NativeContentProvider extends Activity {


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.nativecontentprovider);

        Button view = (Button)findViewById(R.id.viewButton);
        Button add = (Button)findViewById(R.id.createButton);
        Button modify = (Button)findViewById(R.id.updateButton);
        Button delete = (Button)findViewById(R.id.deleteButton);


        view.setOnClickListener(new OnClickListener() {
            public void onClick(View v){
                displayContacts();
                Log.i("NativeContentProvider", "Completed Displaying Contact list");
            }
        });

        add.setOnClickListener(new OnClickListener() {
            public void onClick(View v){
                createContact("Mangesh Joshi", "123456789");
                Log.i("NativeContentProvider", "Created a new contact, of course hard-coded");
            }
        });

        modify.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                updateContact("Sample Name", "987654321");
                Log.i("NativeContentProvider", "Completed updating the email id, if applicable");
            }
        });

        delete.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                deleteContact("Sample Name");
                Log.i("NativeContentProvider", "Deleted the just created contact");
            }
        });
}

private void displayContacts() {

    ContentResolver cr = getContentResolver();
    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
            null, null, null, null);
    if (cur.getCount() > 0) {
        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));
                     Toast.makeText(NativeContentProvider.this, "Name: " + name + ", Phone No: " + phoneNo, Toast.LENGTH_SHORT).show();
                 } 
            pCur.close();
        }
        }
    }
}

private void createContact(String name, String phone) {
    ContentResolver cr = getContentResolver();

    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
            null, null, null, null);

    if (cur.getCount() > 0) {
        while (cur.moveToNext()) {
            String existName = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
            if (existName.contains(name)) {
                Toast.makeText(NativeContentProvider.this,"The contact name: " + name + " already exists", Toast.LENGTH_SHORT).show();
                return;                 
            }
        }
    }

    ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();

    ops.add(ContentProviderOperation.newInsert(ContactsContract.Contacts.CONTENT_URI)
            .withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, "accountname@gmail.com")
            .withValue(ContactsContract.RawContacts.ACCOUNT_NAME, "com.google")
            .build());

    ops.add(ContentProviderOperation.newInsert(ContactsContract.Contacts.CONTENT_URI)
            .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
            .withValue(ContactsContract.Data.MIMETYPE,
                    ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
            .withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, name)
            .build());

    ops.add(ContentProviderOperation.newInsert(ContactsContract.Contacts.CONTENT_URI)
            .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
            .withValue(ContactsContract.Data.MIMETYPE,
                    ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
            .withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, phone)
            .withValue(ContactsContract.CommonDataKinds.Phone.TYPE, ContactsContract.CommonDataKinds.Phone.TYPE_HOME)
            .build());


    try {
        cr.applyBatch(ContactsContract.AUTHORITY, ops);
    } catch (RemoteException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (OperationApplicationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    Toast.makeText(NativeContentProvider.this, "Created a new contact with name: " + name + " and Phone No: " + phone, Toast.LENGTH_SHORT).show();

}

private void updateContact(String name, String phone) {
    ContentResolver cr = getContentResolver();

    String where = ContactsContract.Data.DISPLAY_NAME + " = ? AND " + 
                ContactsContract.Data.MIMETYPE + " = ? AND " +
                String.valueOf(ContactsContract.CommonDataKinds.Phone.TYPE) + " = ? ";
    String[] params = new String[] {name,
            ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE,
            String.valueOf(ContactsContract.CommonDataKinds.Phone.TYPE_HOME)};

    Cursor phoneCur = managedQuery(ContactsContract.Data.CONTENT_URI, null, where, params, null);

    ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();

    if ( (null == phoneCur)  ) {
        createContact(name, phone);
    } else {
        ops.add(ContentProviderOperation.newUpdate(ContactsContract.Data.CONTENT_URI)
                .withSelection(where, params)
                .withValue(ContactsContract.CommonDataKinds.Phone.DATA, phone)
                .build());
    }

    phoneCur.close();

    try {
        cr.applyBatch(ContactsContract.AUTHORITY, ops);
    } catch (RemoteException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (OperationApplicationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    Toast.makeText(NativeContentProvider.this, "Updated the phone number of 'Sample Name' to: " + phone, Toast.LENGTH_SHORT).show();
}

private void deleteContact(String name) {

    ContentResolver cr = getContentResolver();
    String where = ContactsContract.Data.DISPLAY_NAME + " = ? ";
    String[] params = new String[] {name};

    ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
    ops.add(ContentProviderOperation.newDelete(ContactsContract.RawContacts.CONTENT_URI)
            .withSelection(where, params)
            .build());
    try {
        cr.applyBatch(ContactsContract.AUTHORITY, ops);
    } catch (RemoteException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (OperationApplicationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    Toast.makeText(NativeContentProvider.this, "Deleted the contact with name '" + name +"'", Toast.LENGTH_SHORT).show();

}
}