在SyncAdapter更改Kotlin中的数据后更新RecyclerView UI

class MySyncAdapter(context: Context, autoInitialize: Boolean, allowParallelSyncs: Boolean) : AbstractThreadedSyncAdapter(context, autoInitialize, allowParallelSyncs) {
    override fun onPerformSync(account: Account?, extras: Bundle?, authority: String?, provider: ContentProviderClient?, syncResult: SyncResult?) {
        // 同步数据的逻辑
    }
}

<service android:name=".sync.MySyncService"
         android:exported="true">
    <intent-filter>
        <action android:name="android.content.SyncAdapter" />
    </intent-filter>
    <meta-data android:name="android.content.SyncAdapter"
               android:resource="@xml/syncadapter" />
</service>

class MyViewModel : ViewModel() {
    private val _data = MutableLiveData<List<MyData>>()
    val data: LiveData<List<MyData>> get() = _data

    fun updateData(newData: List<MyData>) {
        _data.value = newData
    }
}

class MyActivity : AppCompatActivity() {
    private lateinit var viewModel: MyViewModel
    private lateinit var recyclerView: RecyclerView
    private lateinit var adapter: MyAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        recyclerView = findViewById(R.id.recyclerView)
        adapter = MyAdapter()
        recyclerView.adapter = adapter
        recyclerView.layoutManager = LinearLayoutManager(this)

        viewModel = ViewModelProvider(this).get(MyViewModel::class.java)
        viewModel.data.observe(this, Observer { newData ->
            adapter.submitList(newData)
        })
    }
}

override fun onPerformSync(account: Account?, extras: Bundle?, authority: String?, provider: ContentProviderClient?, syncResult: SyncResult?) {
    // 同步数据的逻辑
    val newData = fetchNewDataFromServer()
    viewModel.updateData(newData)
}