I'm trying to find a contact by display name. The goal is to open this contact and add more data to it (specifically more phone numbers), but I'm struggling to even find the contact I want to update.
This is the code I'm using:
public static String findContact(Context context) {
ContentResolver contentResolver = context.getContentResolver();
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI;
String[] projection = new String[] { PhoneLookup._ID };
String selection = ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " = ?";
String[] selectionArguments = { "John Johnson" };
Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);
if (cursor != null) {
while (cursor.moveToNext()) {
return cursor.getString(0);
}
}
return "John Johnson not found";
}
I do have a contact called "John Johnson", but the method always returns "not found". I also tried searching for a contact with just one name, so that makes no difference.
I suspect that it's something wrong with the uri, selection or selection arguments, because I couldn't find any example online of searching for contacts with a given display name, and it seems display name is a special kind of information, different from for example a phone number.
Any ideas how I can achieve to find John Johnson?
UPDATE: I found out how to find a contact by display name:
ContentResolver contentResolver = context.getContentResolver();
Uri uri = Data.CONTENT_URI;
String[] projection = new String[] { PhoneLookup._ID };
String selection = StructuredName.DISPLAY_NAME + " = ?";
String[] selectionArguments = { "John Johnson" };
Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);
if (cursor != null) {
while (cursor.moveToNext()) {
return cursor.getString(0);
}
}
return "John Johnson not found";
This code returns the contact id of the first contact with display name "John Johnson". In my original code I had the wrong uri and the wrong selection in my query.
Change Your Query URI.
You are using a URI that is meant to filter only phones numbers:
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI;
You need to use a URI that has access to the display_name column, like this:
Uri uri = ContactsContract.Data.CONTENT_URI;
There's a decent breakdown of what URIs to use and when to use them on the Android SDK Documentation:
If you need to read an individual contact, consider using CONTENT_LOOKUP_URI instead of CONTENT_URI.
If you need to look up a contact by the phone number, use PhoneLookup.CONTENT_FILTER_URI, which is optimized for this purpose.
If you need to look up a contact by partial name, e.g. to produce filter-as-you-type suggestions, use the CONTENT_FILTER_URI URI.
If you need to look up a contact by some data element like email address, nickname, etc, use a query against the ContactsContract.Data table. The result will contain contact ID, name etc.
I thinks the issue may caused by the projection you set. Projection is used to tell android which column of data you want to query then you only give the id column so the display name won't return. Try to remove the projection to see whether it works.
-- Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);++ Cursor cursor = contentResolver.query(uri, null, selection, selectionArguments, null);
//method for gaining id
//this method get a name and make fetch it's id and then send the id to other method //named "showinformation" and that method print information of that contact
public void id_return(String name) {
String id_name=null;
Uri resultUri = ContactsContract.Contacts.CONTENT_URI;
Cursor cont = getContentResolver().query(resultUri, null, null, null, null);
String whereName = ContactsContract.Data.MIMETYPE + " = ? AND " + ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME + " = ?" ;
String[] whereNameParams = new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE,name};
Cursor nameCur = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
while (nameCur.moveToNext()) {
id_name = nameCur.getString(nameCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.CONTACT_ID));}
nameCur.close();
cont.close();
nameCur.close();
//for calling of following method
showinformation(id_name);
}
//method for showing information like name ,phone, email and other thing you want
public void showinformation(String id) {
String name=null;
String phone=null;
String email=null;
Uri resultUri = ContactsContract.Contacts.CONTENT_URI;
Cursor cont = getContentResolver().query(resultUri, null, null, null, null);
String whereName = ContactsContract.Data.MIMETYPE + " = ? AND " + ContactsContract.CommonDataKinds.StructuredName.CONTACT_ID+ " = ?" ;
String[] whereNameParams1 = new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE,id};
Cursor nameCur1 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams1, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
while (nameCur1.moveToNext()) {
name = nameCur1.getString(nameCur1.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME));}
nameCur1.close();
cont.close();
nameCur1.close();
String[] whereNameParams2 = new String[] { ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE,id};
Cursor nameCur2 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams2, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
while (nameCur2.moveToNext()) {
phone = nameCur2.getString(nameCur2.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));}
nameCur2.close();
cont.close();
nameCur2.close();
String[] whereNameParams3 = new String[] { ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE,id};
Cursor nameCur3 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams3, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
while (nameCur3.moveToNext()) {
email = nameCur3.getString(nameCur3.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));}
nameCur3.close();
cont.close();
nameCur3.close();
String[] whereNameParams4 = new String[] { ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE,id};
Cursor nameCur4 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams4, ContactsContract.CommonDataKinds.StructuredPostal.DATA);
while (nameCur4.moveToNext()) {
phone = nameCur4.getString(nameCur4.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.DATA));}
nameCur4.close();
cont.close();
nameCur4.close();
//showing result
txadd.setText("Name= "+ name+"\nPhone= "+phone+"\nEmail= "+email);
}
//thank all persons in this site because of many help of me to learn and correction my warn and errors this is only a gift for all of you and ...
The below code should do the trick
if (displayName != null) {
Uri lookupUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_FILTER_URI, Uri.encode(displayName));
String[] displayNameProjection = { ContactsContract.Contacts._ID, ContactsContract.Contacts.LOOKUP_KEY, Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? ContactsContract.Contacts.DISPLAY_NAME_PRIMARY : ContactsContract.Contacts.DISPLAY_NAME };
Cursor cur = context.getContentResolver().query(lookupUri, displayNameProjection, null, null, null);
try {
if (cur.moveToFirst()) {
return true;
}
} finally {
if (cur != null)
cur.close();
}
return false;
} else {
return false;
}
Reference: Retrieving a List of Contacts Article
来源：https://stackoverflow.com/questions/9625308/android-find-a-contact-by-display-name