回答編集履歴
2
修正
test
CHANGED
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@@ -1,4 +1,4 @@
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表示だけのことですので、データ
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表示だけのことですので、リストデータを弄る必要はありません。
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complete と表示したい position のデータを求められたら complete のレイアウトデータを返すようにし、 それ以降のデータを求められたら position-1 の位置の実際のデータを返すだけです。
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@@ -180,7 +180,7 @@
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allData.add(todo)
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-
readAllData.value = allData
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readAllData.value = allData //LiveData発火
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}
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コード追加
test
CHANGED
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@@ -1,3 +1,369 @@
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1
1
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表示だけのことですので、データリストを弄る必要はありません。
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2
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complete と表示したい position のデータを求められたら complete のレイアウトデータを返すようにし、 それ以降のデータを求められたら position-1 の位置の実際のデータを返すだけです。
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----
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Room は関係しなくても良さそうですので、表示部分だけテキトウに作って見ました。
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(単に kotlin も Room も不慣れ(or ほぼ分からない)なだけですが...)
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```kotlin
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package com.teratail.q372341
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import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
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import android.view.ViewGroup
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import android.widget.CheckBox
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import android.widget.TextView
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import androidx.appcompat.app.AppCompatActivity
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import androidx.lifecycle.MutableLiveData
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import androidx.lifecycle.ViewModel
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import androidx.lifecycle.ViewModelProvider
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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class MainActivity : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_main)
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val adapter = ToDoAdapter()
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val recyclerView = findViewById<RecyclerView>(R.id.recyclerview)
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recyclerView.adapter = adapter
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recyclerView.layoutManager = LinearLayoutManager(this)
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val todoViewModel = ViewModelProvider(this).get(ToDoViewModel::class.java)
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todoViewModel.readAllData.observe(this, { todo -> adapter.setData(todo) })
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todoViewModel.add(ToDo(1, false, "todo 1"))
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todoViewModel.add(ToDo(2, true, "todo 2"))
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todoViewModel.add(ToDo(3, false, "todo 3"))
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}
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}
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data class ToDo(
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val id: Int,
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val complete: Boolean,
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val text: String
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)
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class ToDoAdapter: RecyclerView.Adapter<ToDoAdapter.ToDoViewHolder>() {
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private var todoList = emptyList<ToDo>()
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private val layouts = arrayOf(R.layout.recyclerview_item, R.layout.recyclerview_separator)
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class ToDoViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
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val checkBox: CheckBox?
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val textView: TextView?
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init {
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checkBox = itemView.findViewById(R.id.checkBox)
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textView = itemView.findViewById(R.id.textView)
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}
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}
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override fun getItemViewType(position: Int) = if(position == separateIndex()) 1 else 0
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
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ToDoViewHolder(LayoutInflater.from(parent.context).inflate(layouts[viewType], parent, false))
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override fun getItemCount() = todoList.size + if(separateIndex() >= 0) 1 else 0
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override fun onBindViewHolder(holder: ToDoViewHolder, position: Int) {
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val separateIndex = separateIndex()
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if(position == separateIndex) return //セパレータに表示するデータは無い
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val pos = position - if(position > separateIndex) 1 else 0
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val todo = todoList[pos]
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holder.checkBox?.isChecked = todo.complete
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holder.textView?.text = todo.text
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}
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fun setData(todoList: List<ToDo>) {
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this.todoList = todoList.sortedWith(compareBy<ToDo> { it.complete }.thenBy { it.id })
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notifyDataSetChanged()
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}
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private fun separateIndex() = todoList.indexOfFirst { it.complete }
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}
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class ToDoViewModel() : ViewModel() {
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private var allData : MutableList<ToDo> = mutableListOf()
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val readAllData = MutableLiveData<List<ToDo>>(allData)
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fun add(todo: ToDo) {
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allData.add(todo)
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readAllData.value = allData
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}
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}
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```
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res/layout/activity_main.xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".MainActivity">
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<androidx.recyclerview.widget.RecyclerView
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android:id="@+id/recyclerview"
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android:layout_width="0dp"
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android:layout_height="0dp"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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```
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res/layout/recyclerview_item.xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:layout_width="match_parent"
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android:layout_height="wrap_content">
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<CheckBox
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android:id="@+id/checkBox"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<TextView
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android:id="@+id/textView"
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android:layout_width="0dp"
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android:layout_height="wrap_content"
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app:layout_constraintLeft_toRightOf="@id/checkBox"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintBaseline_toBaselineOf="@id/checkBox" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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```
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286
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287
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res/layout/recyclerview_separator.xml
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288
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289
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```xml
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290
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291
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<?xml version="1.0" encoding="utf-8"?>
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292
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293
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:layout_width="match_parent"
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android:layout_height="wrap_content">
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<TextView
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android:layout_width="0dp"
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android:layout_height="wrap_content"
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android:text="Complete"
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android:layout_marginTop="5dp"
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android:layout_marginBottom="10dp"
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android:paddingLeft="5dp"
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318
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android:background="@drawable/upperline"
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320
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app:layout_constraintLeft_toLeftOf="parent"
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323
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app:layout_constraintRight_toRightOf="parent"
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324
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325
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app:layout_constraintTop_toTopOf="parent" />
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326
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327
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328
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329
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</androidx.constraintlayout.widget.ConstraintLayout>
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330
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331
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```
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332
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333
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res/drawable/upperline.xml
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334
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335
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```xml
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336
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337
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<?xml version="1.0" encoding="utf-8"?>
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338
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339
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<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
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340
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341
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342
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343
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<item>
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344
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345
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<shape android:shape="rectangle">
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346
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347
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<solid android:color="#FFFFFF"/>
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348
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349
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<stroke android:width="1dp" android:color="#AAAAAA" />
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350
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351
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</shape>
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352
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353
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</item>
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354
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355
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356
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357
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<item android:top="1dp">
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358
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359
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<shape android:shape="rectangle">
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360
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+
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361
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<solid android:color="#FFFFFF"/>
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362
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363
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</shape>
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364
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365
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</item>
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366
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+
|
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367
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</layer-list>
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368
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+
|
|
369
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+
```
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