android - 如何让我的 Android ContentObserver for ContactsContract 检测到添加、更新或删除的联系人？

Question

我能够收到“联系人数据库发生更改”的一般通知，但我想知道插入、更新或删除的特定记录。以下是注册并获取 onChange 通知的代码。不幸的是，这不是具体的，这使我的处理详尽且效率低下。

这里是代码 stub :

            if ((mNativeContactsObserver == null) && (mHandler == null)) {
            mHandler = new Handler(this.getMainLooper()) {
            };
            mNativeContactsObserver = new ContentObserver(mHandler) {
                @Override
                public void onChange(boolean selfChange) {
                    super.onChange(selfChange);

                    Bundle data = null;
                    Message message = mHandler.obtainMessage();
                    if (message != null) {
                        data = message.getData();
                        if (data != null) {
                            Logs.d(TAG, "Message = [" + message.toString() + "] data=[" + data.toString() + "]");
                            Logs.d(TAG, "Contents = [" + message.describeContents() + "]");
                        }
                    }

                    if (!selfChange) {
                        final Account accountListen = MySyncAdapter.lookupAccount(TAG, getApplicationContext(), getUserProfile().getAccountId(), AUTHORITY_MY_SYNC);
                        Logs.d(TAG, "onChange!? account: " + accountListen.name);
                        if (!ContentResolver.isSyncPending(account, ContactsContract.AUTHORITY) 
                                && (!ContentResolver.isSyncActive(account, ContactsContract.AUTHORITY))) {
                            Bundle extras = new Bundle();
                            extras.putInt(MySyncAdapter.EXTRA_SYNC_TYPE, MySyncAdapter.REQUEST_SYNC_NATIVE_CHANGED);
                            ContentResolver.requestSync(accountListen, ContactsContract.AUTHORITY, extras);
                        } else {
                            Logs.w(TAG, "There is a pending sync.  This request is ignored.");
                        }
                    }
                }
            };
        }
        Uri uriContactsListen = ContactsContract.Contacts.CONTENT_URI.buildUpon().appendEncodedPath("#").build();
        Logs.i(TAG, "Register listening for native contacts changes. [" + uriContactsListen + "]");
        cr.registerContentObserver(uriContactsListen, true, mNativeContactsObserver);

Answer 1

最后至少我能够检测到这个 Update/Delete/Insert 看看我的 OnChange 方法如下

 @Override
       public void onChange(boolean selfChange) {
           super.onChange(selfChange);
           Log.e("ContactChangeObserver", "onChange");

           // 0 Update , 1 Delete , 2 Added
 // Get count from phone contacts
           final int currentCount = contactDBOperaion.getContactsCountFromPhone();

 // Get count from your sqlite database
           int mContactCount= DbContacts.getInstance().getContactsCount();

           if (currentCount < mContactCount) {
               // DELETE HAPPEN.
               Log.e("Status", "Deletion");
               contactDBOperaion.SyncContacts(1);
           } else if (currentCount == mContactCount) {
               // UPDATE HAPPEN.
               contactDBOperaion.SyncContacts(0);
           } else {
               // INSERT HAPPEN.
               Log.e("Status", "Insertion");
               contactDBOperaion.SyncContacts(2);
           }
       }

When Update occurred i update all contacts

When Insert occurred i am inserting newly added row , after checking isExist in existing database

When Delete occurred not found solution yet