Sample Code for various group operations in Android

1. Add Group

// create a groupContentValues values = new ContentValues();values.put(ContactsContract.Groups.TITLE, “GROUPNAME”);Uri uri = getContentResolver().insert(ContactsContract.Groups.CONTENT_URI, values);

Groupname is the name of the group to be created.

2. delete a group

// Delete a group // The deletion flag is not deleted. Real deletion will be automatically implemented in the same step // getcontentresolver (). delete (contactscontract. groups. content_uri, contactscontract. groups. _ ID + "=" + raw_group_id, null); // Delete URI uri = contenturis in the true sense. withappendedid (contactscontract. groups. content_uri, raw_group_id); Uri. builder B = Uri. buildupon (); B. appendqueryparameter (contactscontract. caller_is_syncadapter, "true"); uri = B. build (); getcontentresolver (). delete (Uri, null, null );

Raw_group_id is the group ID, which corresponds to the _ id field in contactscontract. Groups.

3. query all Groups

// query all groupsCursor groupCursor = getContentResolver().query(ContactsContract.Groups.CONTENT_URI, new String[]{ContactsContract.Groups.TITLE, ContactsContract.Groups._ID}, null, null, null);

Query the names and IDs of all groups.

4. Change the name of the specified group.

// update a groupContentValues values = new ContentValues();values.put(ContactsContract.Groups.TITLE, "NEWGROUPTITLE");getContentResolver().update(ContactsContract.Groups.CONTENT_URI, values, ContactsContract.Groups._ID + " = " + raw_group_id, null);

Newgrouptitle is the new group name, And raw_group_id is the group ID.

5. query all contacts in a group

// To query all contacts in a group// First, query the raw_contact_ids of all the contacts in the groupCursor groupContactCursor = getContentResolver().query(Data.CONTENT_URI, new String[]{Data.RAW_CONTACT_ID}, Data.MIMETYPE + "='" + ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE + "' AND " + ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID + " = " + raw_group_id, null, null);// Second, query the corresponding name of the raw_contact_idwhile(groupContactCursor.moveToNext()){Cursor contactCursor = getContentResolver().query(Data.CONTENT_URI, new String[]{Data.RAW_CONTACT_ID, StructuredName.FAMILY_NAME, StructuredName.GIVEN_NAME}, Data.MIMETYPE + "='" + StructuredName.CONTENT_ITEM_TYPE + "' AND " + Data.RAW_CONTACT_ID + "=" + groupContactCursor.getInt(0), null, null);contactCursor.moveToNext();Log.e("TestContractGroupOperationActivity", "Member name is: " + contactCursor.getString(1) + " " + contactCursor.getString(2));contactCursor.close();}groupContactCursor.close();

6. delete a contact from the group.

// Delete a contact from a groupUri uri = Data.CONTENT_URI;Uri.Builder b = uri.buildUpon();b.appendQueryParameter(ContactsContract.CALLER_IS_SYNCADAPTER, "true");uri = b.build();getContentResolver().delete(uri, Data.RAW_CONTACT_ID + "=" + raw_contact_id + " AND " + ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID + " =" + raw_group_id, null);

Delete the contact with ID raw_contact_id from the group with ID raw_group_id.

7. query the groups in which a contact is located.

// First, query all the group ids that a contact is inCursor groupCursor = getContentResolver().query(Data.CONTENT_URI, new String[]{ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID}, ContactsContract.CommonDataKinds.GroupMembership.MIMETYPE + "='" + ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE +"' AND " + Data.RAW_CONTACT_ID + " = " + raw_contact_id, null, null);// Second, get all the corresponding group nameswhile(groupCursor.moveToNext()){Cursor groupNameCursor = getContentResolver().query(ContactsContract.Groups.CONTENT_URI, new String[]{ContactsContract.Groups.TITLE}, ContactsContract.Groups._ID + "=" + groupCursor.getInt(0), null, null);groupNameCursor.moveToNext();Log.e("Test", groupNameCursor.getString(0));groupNameCursor.close();}groupCursor.close();

Raw_contact_id indicates the contact ID.

Note that the group_raw_id contained in groupcursor may be repeated. To eliminate this duplication, you can add the content in groupcursor to a set container, then, find the group name corresponding to the element (unique group_raw_id) in the Set container.