科特林.未实现错误: 未实现操作: 未实现 图像按钮单击出错

Question

收到此错误

科特林。未实现错误：操作未实现：未实现

我正在实现一个图像按钮点击侦听器

要求：- 我想对图像按钮单击执行操作，但收到上述错误

纠正我，如果还有其他解决方法来实现图像按钮单击侦听器，请提供它，谢谢

这是 Java 类fragment

class FragmentClass : Fragment(), View.OnClickListener {
override fun onClick(v: View?) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
when (v?.id) {
R.id.back_icon -> {
Toast.makeText(activity, "back button pressed", Toast.LENGTH_SHORT).show()
activity.onBackPressed()
}
else -> {
}
}
}
override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?,
savedInstanceState: Bundle?): View? {
val view: View = inflater!!.inflate(R.layout.fragment_class, container,
false)
val activity = getActivity()
var input_name = view.findViewById(R.id.input_name) as EditText
var tv_addbucket = view.findViewById(R.id.tv_addbucket) as TextView
val back_icon: ImageButton = view.findViewById(R.id.back_icon)
back_icon.setOnClickListener(this)
tv_addbucket.setOnClickListener(View.OnClickListener {
Toast.makeText(activity, input_name.text, Toast.LENGTH_SHORT).show()
})

return view;
}

}

然后是fragment_class. xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:focusableInTouchMode="true"
android:clickable="true"
android:padding="10dp">
<ImageButton
android:id="@+id/back_icon"
android:layout_width="40dp"
android:layout_height="40dp"
android:background="#0000"
android:focusable="true"
android:focusableInTouchMode="true"
android:clickable="true"
android:src="@drawable/back_icon" />
<TextView
android:id="@+id/tv_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="Add Bucket" />
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/header"
android:fillViewport="true">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize"
android:orientation="vertical"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="60dp">
<android.support.design.widget.TextInputLayout
android:id="@+id/input_layout_name"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/input_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Bucket Name"
android:singleLine="true" />
</android.support.design.widget.TextInputLayout>

<TextView
android:id="@+id/tv_addbucket"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:background="@drawable/blue_stroke_background"
android:gravity="center"
android:padding="15dp"
android:text="Add"
android:textColor="@color/white" />

</LinearLayout>
</ScrollView>
</RelativeLayout>

Answer 1

只需从 onClickListener 中删除TODO( ... )：

override fun onClick(v: View?) {
// No TODO here
when (v?.id) {
...
}
}

TODO(...)是 Kotlin 函数，它总是抛出NotImplementedError。如果您想使用 TODO 标记某些内容但不抛出异常 - 只需将 TODO 与注释一起使用：

override fun onClick(v: View?) {
//TODO: implement later
when (v?.id) {
...
}
}

Answer 2

TODO()是 Kotlin 中的一个内联函数。它总是会抛出 NotImplementError。请参阅 #documentation：https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-t-o-d-o.html

如果只想标记此代码片段仍需要工作，请使用// TODO。然后，该标记将在 TODO 部分中可见，但不会引发异常。

Answer 3

我实现了这个

val extraTime = arrayListOf<String>("1 hour")
val extraTimeAdapter = CustomSpinDeliveryExtraTimeAdapter(context!!, R.layout
.simple_spinner_text_middle_down_arrow, extraTime)
spinCustomTime.adapter = extraTimeAdapter
spinCustomTime.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
override fun onNothingSelected(parent: AdapterView<*>?) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
}

从下面的代码中删除待办事项后

spinCustomTime.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
override fun onNothingSelected(parent: AdapterView<*>?) {
}
override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
}
}

解决了我的问题。

另请参阅此文档链接进行澄清 请参阅 #documentation：https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-t-o-d-o.html

Answer 4

只需从onClickListener中删除TODO("not implemented")：