How can i user hilt Inject RepositoryManager for ViewModel(viewmodel creat by invoke)?

Question

this is my RepositoryManager

@Singleton
class RepositoryManager @Inject constructor(private val retrofit: Retrofit) {

    fun <T> obtainRetrofitService(serviceClass: Class<T>): T {
        return retrofit.create(serviceClass)
    }

}

ViewModel：

class GankViewModel @ViewModelInject constructor() : BaseViewModel() {

    @Inject lateinit var repositoryManager: RepositoryManager

    fun getGankGirl() {
        repositoryManager.obtainRetrofitService(GankApi::class.java)
            .getGankGirls()
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribeWith(object : BaseObserver<GirlBean>() {
                override fun success(data: GirlBean) {
                    showLoading(true)
                }
            })
    }
}

Activity:

@AndroidEntryPoint
class GankActivity : BaseActivity<ActivityGankBinding, GankViewModel>() {

    override fun init() {
        viewModel.getGankGirl()
    }

}

BaseActivity:

abstract class BaseActivity<VB : ViewBinding, VM : BaseViewModel> :RxFragmentActivity(),
    IBaseView {
    protected lateinit var binding: VB
    protected lateinit var viewModel: VM
    private val loading: BasePopupView by lazy {
        XPopup.Builder(this).asCustom(LoadingSimplePopup(this))
    }

    @Suppress("UNCHECKED_CAST")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val type = javaClass.genericSuperclass as ParameterizedType
        val modelProvider = ViewModelProvider(this)

        val clazz0 = type.actualTypeArguments[0] as Class<VB>
        val method = clazz0.getMethod("inflate", LayoutInflater::class.java)
        binding = method.invoke(null, layoutInflater) as VB
        setContentView(binding.root)

        val clazz1 = type.actualTypeArguments[1] as Class<VM>
        viewModel = modelProvider.get(clazz1)

        init()

        viewModel.loadingEvent.observe(this, { isShow ->
            if (isShow) showLoading() else dismissLoading()
        })
    }

    abstract fun init()

    override fun showLoading() {
        if (!loading.isShow) {
            loading.show()
        }
    }

    override fun dismissLoading() {
        if (loading.isShow) {
            loading.dismiss()
        }
    }

}

and the EXCEPTION ：

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.kotlin, PID: 20050 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.kotlin/com.cmy.domain.ui.gank.ui.GankActivity}: kotlin.UninitializedPropertyAccessException: lateinit property repositoryManager has not been initialized at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3897) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4076) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2473) at android.os.Handler.dispatchMessage(Handler.java:110) at android.os.Looper.loop(Looper.java:219) at android.app.ActivityThread.main(ActivityThread.java:8349) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055) Caused by: kotlin.UninitializedPropertyAccessException: lateinit property repositoryManager has not been initialized at com.cmy.domain.ui.gank.vm.GankViewModel.getGankGirl(GankViewModel.kt:19) at com.cmy.domain.ui.gank.ui.GankActivity.init(GankActivity.kt:32) at com.cmy.common.ui.base.BaseActivity.onCreate(BaseActivity.kt:38) at com.cmy.domain.ui.gank.ui.Hilt_GankActivity.onCreate(Hilt_GankActivity.java:30) at android.app.Activity.performCreate(Activity.java:8085) at android.app.Activity.performCreate(Activity.java:8073) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1320) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3870) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4076) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2473) at android.os.Handler.dispatchMessage(Handler.java:110) at android.os.Looper.loop(Looper.java:219) at android.app.ActivityThread.main(ActivityThread.java:8349) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)

Does this answer your question? [Hilt Inject into ViewModel without constructor params](https://stackoverflow.com/questions/62980426/hilt-inject-into-viewmodel-without-constructor-params) — ADM, Dec 31 '20 at 04:26

score 0 · Answer 1 · edited Dec 31 '20 at 04:06

0

you only need to fix your ViewModel

class GankViewModel @ViewModelInject constructor(var repositoryManager: RepositoryManager) : BaseViewModel() {
... }

If you can check it again

edited Dec 31 '20 at 04:06

Ichigo Kurosaki

3,765
8
41
56

answered Dec 31 '20 at 03:27

Justin Nguyen

1

thanks for answer,i try fix my viewmodel,and now it has anather exception ` Cannot create an instance of class com.cmy.domain.ui.gank.vm.GankViewModel ...... at com.cmy.common.ui.base.BaseActivity.onCreate(BaseActivity.kt:36) at com.cmy.domain.ui.gank.ui.Hilt_GankActivity.onCreate(Hilt_GankActivity.java:30)` – MengYuan Cheng Dec 31 '20 at 06:07
You can try get viewmodel by extension // Get a reference to the ViewModel scoped to this GrankActivity val viewModel by viewModels() – Justin Nguyen Dec 31 '20 at 08:27

How can i user hilt Inject RepositoryManager for ViewModel(viewmodel creat by invoke)?

1 Answers1