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/*
* Copyright 2019 Rúben Sousa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.rubensousa.recyclerview.nested
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
class MainActivity : AppCompatActivity() {
private lateinit var adapter: ParentAdapter
private lateinit var recyclerView: RecyclerView
private lateinit var scrollStateHolder: ScrollStateHolder
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
recyclerView = findViewById(R.id.recyclerView)
scrollStateHolder = ScrollStateHolder(savedInstanceState)
adapter = ParentAdapter(scrollStateHolder)
recyclerView.adapter = adapter
recyclerView.layoutManager = LinearLayoutManager(this)
loadItems()
}
override fun onSaveInstanceState(outState: Bundle) {
super.onSaveInstanceState(outState)
scrollStateHolder.onSaveInstanceState(outState)
}
private fun loadItems() {
val lists = arrayListOf<TitledList>()
repeat(20) { listIndex ->
val items = arrayListOf<String>()
repeat(30) { itemIndex -> items.add(itemIndex.toString()) }
lists.add(TitledList("List number $listIndex", items))
}
adapter.setItems(lists)
}
}
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