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GenericAdapter.kt
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GenericAdapter.kt
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package com.mindbyromanzanoni.genrics
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.animation.Animation
import android.view.animation.AnimationUtils
import androidx.databinding.DataBindingUtil
import androidx.databinding.ViewDataBinding
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import com.mindbyromanzanoni.R
/**
* [GenericAdapter]
* this class is design for create an abstraction layer over our recycler view Adapter.
* Generics are the powerful features that allow us to define classes,
* methods and properties which are accessible using different data types while keeping a check of the compile-time type safety.
* <T> is used for Layout Type Binding
* <M> is used for Data Class for specific type
* Pass a <M> in DiffUtil Class
* */
abstract class GenericAdapter<T, M>(var isShowAnimation: Boolean = true) : ListAdapter<M, RecyclerView.ViewHolder>(
GenericDiffUtil<M>()
) {
private lateinit var binding: ViewDataBinding
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
binding = DataBindingUtil.inflate(
LayoutInflater.from(parent.context),
getResourceLayoutId(),
parent,
false
)
return ViewHolder(binding)
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
try {
holder as ViewHolder
// holder.binding.root.setAnimation()
val dataClass = getItem(position)
onBindHolder(holder.binding as T, dataClass, position)
} catch (e: Exception) {
e.printStackTrace()
}
}
class ViewHolder(val binding: ViewDataBinding) : RecyclerView.ViewHolder(binding.root)
abstract fun getResourceLayoutId(): Int
abstract fun onBindHolder(holder: T, dataClass: M, position: Int)
/**
* this function is user to perform [Animation] on item view
* */
private fun View.setAnimation() {
if (isShowAnimation){
val animation: Animation =
AnimationUtils.loadAnimation(this.context, R.anim.recycler_animation)
this.startAnimation(animation)
}
}
}