Question

我收到mPresenter尚未初始化的错误。我不明白为什么？
使用Kotlin时出现此错误，但是如果使用JAVA，一切都很好
这是我的代码

查看

@StateStrategyType(value = AddToEndStrategy::class)
interface IHelloWorldView : MvpView {
    fun showMessage(message: Int)
}

演示者

@InjectViewState
class HelloWorldPresenter : MvpPresenter<IHelloWorldView>() {
    fun show() = viewState.showMessage(R.string.message)
}

MainActivity

class MainActivity : MvpAppCompatActivity(), IHelloWorldView {

    @InjectPresenter
    lateinit var mPresenter: HelloWorldPresenter

    lateinit var mText: TextView
    lateinit var mButton: Button

    override fun showMessage(message: Int) {
        mText.setText(message)
    }

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

        mText = findViewById(R.id.text)
        mButton = findViewById(R.id.button)
        mButton.setOnClickListener {
            mPresenter.show()
        }
    }
}

Answer 1

因为您需要像在JAVA Foo foo = new Foo();中那样进行初始化

似乎您只创建了一个变量

class MainActivity : MvpAppCompatActivity(), IHelloWorldView {

    @InjectPresenter
    lateinit var mPresenter: HelloWorldPresenter
    //initialisation

    @ProvidePresenterTag(presenterClass = HelloWorldPresenter::class, type =PresenterType.GLOBAL)
    fun providemPresenter() = HelloWorldPresenter()
    fun mPresenter() = HelloWorldPresenter()

    lateinit var mText: TextView
    lateinit var mButton: Button

    override fun showMessage(message: Int) {
        mText.setText(message)
    }

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

        mText = findViewById(R.id.text)
        mButton = findViewById(R.id.button)
        mButton.setOnClickListener {
            mPresenter.show()
        }
    }
}

Answer 2

类型= PresenterType.GLOBAL -不存在（至少在kotlin中）

Moxy为什么不初始化Presenter（Kotlin，Android）

2 个答案: