[英]Adding RecyclerView Item Total
In my Project, I have a recyclerview which contains adapter and fragment class. 在我的项目中,我有一个包含适配器和片段类的recyclerview。 Everything is working as expected and I am trying to sum a particular column value and display it in a text field.
一切都按预期工作,我正在尝试对特定的列值求和并将其显示在文本字段中。 I tried below total method but its not working.
我尝试了以下总方法,但无法正常工作。 Any help is appreciated.
任何帮助表示赞赏。
Language Used 使用语言
Kotlin
Code Used 使用的代码
Adapter Class 转接器类别
override fun onBindViewHolder(holder: ViewHolder, position: Int)
{
holder.bindcar(list[position],fragment)
}
fun bindcar(Test: TestCart?, fragment: TestFragment)=with(carView)
{
TestName.text=Test?.carName
TestQuantity.text= Test?.carQuantity.toString()
TestPrice.text= Test?.carPrice!!.toString()
}
Fragment 分段
for (c in carList!!.iterator())
{
val car=TestCart()
//var carPrice=0
car.carName=c.carName
car.carQuantity=c.carQuantity
car.carPrice=c.carPrice
// car.carPrice= c.carPrice!! +Price
carListcars!!.add(car)
}
adapter!!.notifyDataSetChanged()
}
Expectation 期望
Total CarPrice in the Recycler View.
you can use sumBy method of Kotlin List to do that. 您可以使用Kotlin List的sumBy方法来做到这一点。
Inside your fragment class add below code 在片段类内部添加以下代码
for (c in carList!!.iterator())
{
val car=TestCart()
//var carPrice=0
car.carName=c.carName
car.carQuantity=c.carQuantity
car.carPrice=c.carPrice
// car.carPrice= c.carPrice!! +Price
carListcars!!.add(car)
}
adapter!!.notifyDataSetChanged()
// sumby code
var totalAmount: Int = carListcars.sumBy{ it.carPrice }
// setting your textView
TestPrice.text = totalAmount.toString()
}
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