why won't contacts aggregate?

Question

My app allows editing contacts. In this scenario, I chose a contact which existed in only one account and changed it to associate it with three accounts. However, I ended up

Answer 1

Don't assume the system to aggregate similar contacts, if you want RawContacts to join force aggregation by writing to AggregationExceptions:

for each pair, create an operation:

Builder builder = ContentProviderOperation.newUpdate(AggregationExceptions.CONTENT_URI);
builder.withValue(AggregationExceptions.TYPE, AggregationExceptions.TYPE_KEEP_TOGETHER);
builder.withValue(AggregationExceptions.RAW_CONTACT_ID1, raw1);
builder.withValue(AggregationExceptions.RAW_CONTACT_ID2, raw2);
ContentProviderOperation op = builder.build();

Then execute an ArrayList of all operations:

ContentProviderResult[] res = resolver.applyBatch(ContactsContract.AUTHORITY, operationList);

res will contain info about the success/failure of all operations