Google/Facebook登录MVVM [英] Google/Facebook Sign In in MVVM
问题描述
我在我的项目中使用带有数据绑定的MVVM结构.进行GG/FB登录时,事情变得很奇怪,因为它们需要Context
I'm using MVVM structure with Data Binding in my project. Things get weird when it comes to GG/FB Sign In, because they need Context
googleApiClient = new GoogleApiClient.Builder(context)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
startActivityForResult(signInIntent, GOOGLE_AUTH);
GoogleApiClient
需要Context
,所以我不能将其传递给ViewModel,后者会接收DataBinding事件.
GoogleApiClient
needs Context
so I can't pass it to ViewModel, which receives DataBinding events.
class LoginViewModel(
dataManager: DataManager,
schedulerProvider: SchedulerProvider
) : BaseViewModel<LoginNavigator>(dataManager, schedulerProvider) {
fun loginGoogle(){
setIsLoading(true)
//No idea what to write in here
}
}
是否可以使用带有MVVM结构的Gg/FB登录?还是我只需要按照原来的方式做(Activity
中的所有内容)?
Is there any way to use Gg/FB Sign In with MVVM structure ? Or I just have to do the original way (do everything in Activity
) ?
推荐答案
这非常简单,这要感谢 @Erik Browne 和带有接收器的Kotlin函数文字
It is very simple thanks to @Erik Browne and Kotlin’s Function literals with receiver
Create LiveMessageEvent
class LiveMessageEvent<T> : SingleLiveEvent<(T.() -> Unit)?>() {
fun setEventReceiver(owner: LifecycleOwner, receiver: T) {
observe(owner, Observer { event ->
if ( event != null ) {
receiver.event()
}
})
}
fun sendEvent(event: (T.() -> Unit)?) {
value = event
}
}
创建界面
interface ActivityNavigation {
fun startActivityForResult(intent: Intent?, requestCode: Int)
}
**现在是时候实施了! **
在您的LoginViewModel中
const val GOOGLE_SIGN_IN : Int = 9001
class LoginViewModel @Inject constructor(
private val loginRepository: LoginRepository,
private val googleSignInClient: GoogleSignInClient
): ViewModel() {
val startActivityForResultEvent = LiveMessageEvent<ActivityNavigation>()
..
//Called on google login button click
fun googleSignUp() {
val signInIntent = googleSignInClient.signInIntent
startActivityForResultEvent.sendEvent { startActivityForResult(signInIntent, GOOGLE_SIGN_IN) }
}
//Called from Activity receving result
fun onResultFromActivity(requestCode: Int, resultCode: Int, data: Intent?) {
when(requestCode) {
GOOGLE_SIGN_IN -> {
val task = GoogleSignIn.getSignedInAccountFromIntent(data)
googleSignInComplete(task)
}
..
}
}
private fun googleSignInComplete(completedTask: Task<GoogleSignInAccount>) {
try {
val account = completedTask.getResult(ApiException::class.java)
account?.apply {
// .. Store user details
emitUiState(
showSuccess = Event(R.string.login_successful)
)
}
}catch (e: ApiException) {
emitUiState(
showError = Event(R.string.login_failed)
)
}
}
在您的LoginActivty [实施活动导航界面]
//Called from onCreate once the ViewModel is initialized.
private fun subscribeUi() {
//this sets the LifeCycler owner and receiver
viewModel.startActivityForResultEvent.setEventReceiver(this, this)
..
}
public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
viewModel.onResultFromActivity(requestCode,resultCode,data)
super.onActivityResult(requestCode, resultCode, data)
}
这篇关于Google/Facebook登录MVVM的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!