android 查找联系人方法(支持首拼,全拼,英文)

//google源码:

public Cursor searchContact(Context ctxt, CharSequence constraint) {
Uri uri = Uri.withAppendedPath(ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI, Uri.encode(cons));
return ctxt.getContentResolver().query(uri,
PROJECTION_PHONE,
null, //selection,
null,
SORT_ORDER);
}