android – java.lang.IllegalArgumentException：指定为非null的参数为null：方法kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull

我收到了这个错误

java.lang.IllegalArgumentException：指定为非null的参数为null：方法kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull,参数事件

为线

覆盖fun onEditorAction(v：TextView,actionId：Int,event：KeyEvent)

以下是整个代码.这段代码最初是在java中,我使用Android Studio将其转换为Kotlin,但现在我收到了这个错误.我尝试重建和清理项目,但这没有用.

val action = supportActionBar //get the actionbar
action!!.setdisplayShowCustomEnabled(true) //enable it to display a custom view in the action bar.
action.setCustomView(R.layout.search_bar)//add the custom view
action.setdisplayShowTitleEnabled(false) //hide the title

edtSearch = action.customView.findViewById(R.id.edtSearch) as EditText //the text editor


//this is a listener to do a search when the user clicks on search button
edtSearch?.setonEditorActionListener(object : TextView.OnEditorActionListener {
    override fun onEditorAction(v: TextView,actionId: Int,event: KeyEvent): Boolean {
    if (actionId == EditorInfo.IME_ACTION_SEARCH) {
         Log.e("TAG","search button pressed")  //doSearch()
         return true
        }
     return false
    }
})

解决方法

最后一个参数可以为null,如 docs所述：

KeyEvent: If triggered by an enter key,this is the event; otherwise,this is null.

所以你需要做的就是让Kotlin类型为空可以解释这个问题,否则注入的null检查会在你的应用程序获得一个带有null值的调用时崩溃,就像你已经看到它一样：

edtSearch?.setonEditorActionListener(object : TextView.OnEditorActionListener {
    override fun onEditorAction(v: TextView,event: KeyEvent?): Boolean {
        ...
    }
})

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