Android Studio File Template Samples

ListAdapterTemplate.kt

#* 
  Thus begins a multi-line comment, the Velocity Templating Engine will
  ignore it.
	
	This template that can be used to quickly generate a ListAdapter and
	DiffUtil to be used with your recyclerviews.

	Setting imports are not essential because after the file is generated from 
	the template, the developer can always include the missing imports manually.
*#

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME}#end

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView

class ${NAME} : ListAdapter<${Data_Model}, ${NAME}.ItemViewHolder>(${Data_Model}DiffCallback())  {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder {
        val view = LayoutInflater.from(parent.context)
                        .inflate(R.layout.${Item_Layout_Name}, parent, false)
        return ItemViewHolder(view)
    }

    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
        getItem(position)?.let {
            holder.bind(it)
        }
    }

    class ItemViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        fun bind(item: ${Data_Model}) = with(itemView) {
            // Set data to your item view here
            
            setOnClickListener {
                onClick(item)
            }
        }
        
        private fun onClick(item: ${Data_Model}) {
            // Handle item click actions
        }
    }
}

class ${Data_Model}DiffCallback : DiffUtil.ItemCallback<${Data_Model}>() {
    override fun areItemsTheSame(oldItem: ${Data_Model}, newItem: ${Data_Model}): Boolean {
        return oldItem.id == newItem.id
    }

    override fun areContentsTheSame(oldItem: ${Data_Model}, newItem: ${Data_Model}): Boolean {
        return oldItem == newItem
    }
}

ListConverterTemplate.kt

#* 
  Thus begins a multi-line comment, the Velocity Templating Engine will
  ignore it.
	
	This template that can be used to quickly generate converter classes
	which are use when storing a nested list of entities in a parent entity 
	schema. To be used with room db.

	Setting imports are not essential because after the file is generated from 
	the template, the developer can always include the missing imports manually.
*#

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME}#end

import androidx.room.TypeConverter
import com.google.gson.Gson
import com.google.gson.reflect.TypeToken


class ${NAME} {
    companion object {
        
        @TypeConverter
        @JvmStatic
        fun toList(strValue: String) : List<${Model_Class}> {
            val listType = object: TypeToken<List<${Model_Class}>>(){}.type
            return Gson().fromJson(string, listType)
        }
        
        
        @TypeConverter
        @JvmStatic
        fun fromList(list: List<${Model_Class}>) : String {
            return Gson().toJson(list)
        }
    }
}