Set a custom contact item in android address book

addExtraContactData.java

/**
 * This code is based in https://github.com/nemezis/SampleContacts
 * I'm just explaining it, since I lost a lot of time figuring out how it really works
 * **/

package com.my_app;

import java.util.ArrayList;
import java.util.List;


import android.content.ContentProvider;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Entity;
import android.database.Cursor;
import android.net.Uri;
import android.provider.Contacts;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.CommonDataKinds.StructuredName;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.Groups;
import android.provider.ContactsContract.RawContacts;
import android.provider.ContactsContract.Settings;
import android.webkit.WebChromeClient.CustomViewCallback;

public class ContactsManager {
  // this must be exactly mime type defined in contacts.xml
	private static String MIMETYPE = "vnd.android.cursor.item/com.my_app.contact_item";
	
	public static void addContact(Context context, MyContact contact) { // My Contact object is a custom object made by you
		ContentResolver resolver = context.getContentResolver();
		resolver.delete(RawContacts.CONTENT_URI, RawContacts.ACCOUNT_TYPE + " = ?", new String[] { AccountGeneral.ACCOUNT_TYPE });
		
		ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
		
		/**
		 * this is very important, if you want to add this raw contact to a contact (please refer to android contact provider guide in order to get the difference)
		 * my advise is you to add contact id manually, even though most times android does this automatically.
		 * **/
		int contact_id = 1234;
		
		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(RawContacts.CONTENT_URI, true))
				.withValue(RawContacts.ACCOUNT_NAME, AccountGeneral.ACCOUNT_NAME)
				.withValue(RawContacts.ACCOUNT_TYPE, AccountGeneral.ACCOUNT_TYPE)
				.withValue(ContactsContract.RawContacts.CONTACT_ID, contact_id)
				.build());
		
		// this is for display name
		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(Settings.CONTENT_URI, true))
				.withValue(RawContacts.ACCOUNT_NAME, AccountGeneral.ACCOUNT_NAME)
        		.withValue(RawContacts.ACCOUNT_TYPE, AccountGeneral.ACCOUNT_TYPE)
        		.withValue(Settings.UNGROUPED_VISIBLE, 1)
        		.build());

		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true)) 
		 	    .withValueBackReference(Data.RAW_CONTACT_ID, 0) 
		 	    .withValue(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE) 
		 	    .withValue(StructuredName.GIVEN_NAME, contact.name) 
		 	    .withValue(StructuredName.FAMILY_NAME, contact.lastName) 
		 	    .build()); 

		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true)) 
				.withValueBackReference(Data.RAW_CONTACT_ID, 0) 
				.withValue(ContactsContract.Data.MIMETYPE,ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
				.withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, "12342145")
				.build());
		
		
		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true)) 
				 .withValueBackReference(Data.RAW_CONTACT_ID, 0)
	             .withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE)
	             .withValue(ContactsContract.CommonDataKinds.Email.DATA, "[email protected]")
	             .build());		
		
		//This is our custom data field in our contact
		ops.add(ContentProviderOperation.newInsert(addCallerIsSyncAdapterParameter(Data.CONTENT_URI, true))
				.withValueBackReference(Data.RAW_CONTACT_ID, 0)
				.withValue(Data.MIMETYPE, MIMETYPE)
				.withValue(Data.DATA1, 12345)
				.withValue(Data.DATA2, "sample")
				.withValue(Data.DATA3, "sample")
				.build());
		try {
			ContentProviderResult[] results = resolver.applyBatch(ContactsContract.AUTHORITY, ops);
			if (results.length == 0)
				;
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	private static Uri addCallerIsSyncAdapterParameter(Uri uri, boolean isSyncOperation) {
        if (isSyncOperation) {
            return uri.buildUpon()
                    .appendQueryParameter(ContactsContract.CALLER_IS_SYNCADAPTER, "true")
                    .build();
        }
        return uri;
    }
	
	public static List<MyContact> getMyContacts() {
		return null;
	}
	
	
	public static void updateMyContact(Context context, String name) {
		int id = -1;
		 Cursor cursor = context.getContentResolver().query(Data.CONTENT_URI, new String[] { Data.RAW_CONTACT_ID, Data.DISPLAY_NAME, Data.MIMETYPE, Data.CONTACT_ID }, 
				 		 StructuredName.DISPLAY_NAME + "= ?", 
				 		 new String[] {name}, null);
		 if (cursor != null && cursor.moveToFirst()) {
			 do {
				 id = cursor.getInt(0);
				 Log.i(cursor.getString(0));
				 Log.i(cursor.getString(1));
				 Log.i(cursor.getString(2));
				 Log.i(cursor.getString(3));
				 
			 } while (cursor.moveToNext());
		 }
		 if (id != -1) {
			ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
			
			ops.add(ContentProviderOperation.newInsert(Data.CONTENT_URI)
				.withValue(Data.RAW_CONTACT_ID, id)
				.withValue(Data.MIMETYPE, Email.CONTENT_ITEM_TYPE)
				.withValue(Email.DATA, "sample")
				.build());

			ops.add(ContentProviderOperation.newInsert(Data.CONTENT_URI)
				.withValue(Data.RAW_CONTACT_ID, id)
				.withValue(Data.MIMETYPE, MIMETYPE)
				.withValue(Data.DATA1, "profile")
				.withValue(Data.DATA2, "profile")
				.withValue(Data.DATA3, "profile")
				.build());
			
			try {
				context.getContentResolver().applyBatch(ContactsContract.AUTHORITY, ops);
			}
			catch (Exception e) {
				e.printStackTrace();
			}
		 }
		 else {
			 Log.i("id not found");
		 }
		 
		 
	}

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.my_app" >
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />

    <!-- for syncing -->
    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />
    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />
    <uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
    <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/my_icon"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        >
        <service
            android:name=".SyncService"
            android:exported="true" >
            <intent-filter>
                <action android:name="android.content.SyncAdapter" />
            </intent-filter>

            <meta-data android:name="android.content.SyncAdapter" android:resource="@xml/syncadapter" />
            <meta-data android:name="android.provider.CONTACTS_STRUCTURE" android:resource="@xml/contacts" />
        </service>
        <!-- IMPORTANT: this activity is mandatory since it will not show your app icon in contact details if you ommit this
        Actually omiting this made me lose a lot ot time -->
        <!-- MimeType must be the same you defined in contacts.xml -->
        <activity android:name=".ViewDataACtivity" >
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="vnd.android.cursor.item/com.my_app.contact_item" />
            </intent-filter>
        </activity>

    </application>

</manifest>

contacts.xml

<?xml version="1.0" encoding="utf-8"?>

<ContactsSource xmlns:android="http://schemas.android.com/apk/res/android">
    <ContactsDataKind
        android:mimeType="vnd.android.cursor.item/com.my_app.contact_item"
        android:icon="@drawable/ic_launcher"
        android:summaryColumn="data2"
        android:detailColumn="data3"/>
</ContactsSource>

syncadapter.xml

<?xml version="1.0" encoding="utf-8"?>

<sync-adapter
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:accountType="com.my_app"
    android:contentAuthority="com.android.contacts"  <!-- mandatory to set exactly this -->
    android:userVisible="true"
    android:supportsUploading="false"/>

Brilliant!! Absolutely brilliant. Thanks!

Guys, correct me if I am wrong but these custom types are not saved on Google account? They are only local?
Have you verified that the custom data is saved on Google?