（android）动态嵌套回收器视图项目中的随机更改问题
嗨， 我正在制作一个动态的（android）动态嵌套回收器视图项目中的随机更改问题,android,android-recyclerview,Android,Android Recyclerview,嗨， 我正在制作一个动态的嵌套回收视图 外部回收视图（例行程序）由以下部分组成（A、B、C…）、添加按钮、 和delete按钮，内部回收视图（详细程序）由文本视图（设置、重量和计数）组成 当我添加外部项时，默认情况下它有一个内部RecyclerView项 我认为实施是成功的，但事实并非如此 这张照片是我事先做了一些东西的条件 这是一张在那里创建其他项目的图片 然而，在图中，当我添加G项时，您可以看到F项 而B项发生了变化 奇怪的是，G项有两个基本项。本来就是这样 第二张图片是后面添加的项目 如果
嵌套回收视图外部回收视图（例行程序）RecyclerViewG项时，您可以看到F项
而B项
发生了变化
奇怪的是，G项有两个基本项。本来就是这样
第二张图片是后面添加的项目
如果我添加了一个新的外部回收视图
项目，整个系统将有一个新的变化
请再说一遍
我不知道为什么会发生这种变化。如果添加新项目，则需要
保留现有项目
请告诉我原因
这是代码
RoutineAdapter.java（外部循环视图适配器）
公共类RoutineAdapter扩展了RecyclerView.Adapter{
语境；
ArrayList routineItems=新的ArrayList（）；
公共RoutineDetailAdapter-detailAdapter；
OnRoutineItemClickListener侦听器；
公共无效设置OnRoutineClickListener（OnRoutineItemClickListener侦听器）{
this.listener=listener；
}
公共无效附加项（RoutineModel项）{
常规项目。添加（项目）；
notifyDataSetChanged（）；
}
public void addDetailItem（RoutineDetailAdapter curDetailAdapter）{
curDetailAdapter.addItem（新RoutineDetailModel（））；
}
public void deleteDetailItem（RoutineDetailAdapter curDetailAdapter）{
curDetailAdapter.deleteItem（）；
}
@非空
@凌驾
public ViewHolder onCreateViewHolder（@NonNull ViewGroup parent，int viewType）{
context=parent.getContext（）；
LayoutFlater充气机=LayoutFlater.from（上下文）；
视图项视图=充气机。充气（R.layout.routine\u项，父项，false）；
ViewHolder=新的ViewHolder（项目视图）；
detailAdapter=新RoutineDetailAdapter（）；
holder.setRoutineDetailRecyClerView（）；
支架。rv_详图。设置适配器（详图适配器）；
addItem（新RoutineDetailModel（））；
报税表持有人；
}
@凌驾
public void onBindViewHolder（@NonNull ViewHolder，int位置）{
RoutineModel curRoutineItem=routineItems.get（位置）；
持有者。设置项目（当前项目）；
}
@凌驾
public int getItemCount（）{
返回routineItems.size（）；
}
公共类ViewHolder扩展了RecyclerView.ViewHolder{
RecyclerView rv_详图；
文本视图例程；
按钮地址集；
按钮删除集；
公共视图持有者（@NonNull View itemView）{
超级（项目视图）；
initViews（）；
addSet.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
RoutineDetailAdapter curDetailAdapter=（RoutineDetailAdapter）rv_detail.getAdapter（）；
OnAddBtnClick（curDetailAdapter）；
}
});
deleteSet.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
RoutineDetailAdapter curDetailAdapter=（RoutineDetailAdapter）rv_detail.getAdapter（）；
OnDeleteBtnClick（curDetailAdapter）；
}
});
}
私有void initViews（）{
例程=itemView.findViewById（R.id.routine）；
rv_detail=itemView.findviewbyd（R.id.detail_例程）；
addSet=itemView.findviewbyd（R.id.add\u集）；
deleteSet=itemView.findviewbyd（R.id.delete\u集）；
}
私有void集合项（RoutineModel routineItem）{
setText（routineItem.getRoutine（））；
}
public void setRoutineDetailRecyClerView（）{
rv_detail.setLayoutManager（新的LinearLayoutManager（context，RecyclerView.VERTICAL，false））；
}
}
RoutineItemClickListener上的公共接口{
在ADDBTNCLICK（RoutineDetailAdapter-detailAdapter）上公开作废；
公共无效OnDeleteBtnClick（RoutineDetailAdapter detailAdapter）；
}
}
RoutineDetailAdapter.java（内部循环视图适配器）
公共类RoutineDetailAdapter扩展了RecyclerView.Adapter{
ArrayList items=新建ArrayList（）；
语境；
插入位置；
删除位置；
公共无效附加项（RoutineDetailModel项）{
项目。添加（项目）；
notifyItemInserted（插入位置）；
}
公共无效删除项（）{
试一试{
如果（items.size（）>1）{//至少保留一组
项目。移除（删除位置）；
删除（删除位置）；
deletePosition-=1；
}
}捕获（例外e）{
//空的
}
}
公共阵列列表getItem（）{
归还此物品；
}
@非空
@凌驾
public ViewHolder onCreateViewHolder（@NonNull ViewGroup parent，int viewType）{
context=parent.getContext（）；
LayoutInflater充气器=LayoutInflater.from（parent.getContext（））；
视图项视图=充气机。充气（R.layout.routine\u detail\u项目，父项，false）；
返回新的ViewHolder（itemView）；
}
@凌驾
public void onBindViewHolder（@NonNull ViewHolder，int位置）{
RoutineDetailModelItem=items.get（位置）；
H
public class RoutineAdapter extends RecyclerView.Adapter<RoutineAdapter.ViewHolder> {
Context context;
ArrayList<RoutineModel> routineItems = new ArrayList<>();
public RoutineDetailAdapter detailAdapter;
OnRoutineItemClickListener listener;
public void setOnRoutineClickListener(OnRoutineItemClickListener listener) {
this.listener = listener;
}
public void addItem(RoutineModel item) {
routineItems.add(item);
notifyDataSetChanged();
}
public void addDetailItem(RoutineDetailAdapter curDetailAdapter) {
curDetailAdapter.addItem(new RoutineDetailModel());
}
public void deleteDetailItem(RoutineDetailAdapter curDetailAdapter) {
curDetailAdapter.deleteItem();
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
View itemView = inflater.inflate(R.layout.routine_item, parent, false);
ViewHolder holder = new ViewHolder(itemView);
detailAdapter = new RoutineDetailAdapter();
holder.setRoutineDetailRecyClerView();
holder.rv_detail.setAdapter(detailAdapter);
detailAdapter.addItem(new RoutineDetailModel());
return holder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
RoutineModel curRoutineItem = routineItems.get(position);
holder.setItems(curRoutineItem);
}
@Override
public int getItemCount() {
return routineItems.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
RecyclerView rv_detail;
TextView routine;
Button addSet;
Button deleteSet;
public ViewHolder(@NonNull View itemView) {
super(itemView);
initViews();
addSet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RoutineDetailAdapter curDetailAdapter = (RoutineDetailAdapter) rv_detail.getAdapter();
listener.OnAddBtnClick(curDetailAdapter);
}
});
deleteSet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RoutineDetailAdapter curDetailAdapter = (RoutineDetailAdapter) rv_detail.getAdapter();
listener.OnDeleteBtnClick(curDetailAdapter);
}
});
}
private void initViews() {
routine = itemView.findViewById(R.id.routine);
rv_detail = itemView.findViewById(R.id.detail_routine);
addSet = itemView.findViewById(R.id.add_set);
deleteSet = itemView.findViewById(R.id.delete_set);
}
private void setItems(RoutineModel routineItem) {
routine.setText(routineItem.getRoutine());
}
public void setRoutineDetailRecyClerView() {
rv_detail.setLayoutManager(new LinearLayoutManager(context, RecyclerView.VERTICAL, false));
}
}
public interface OnRoutineItemClickListener {
public void OnAddBtnClick(RoutineDetailAdapter detailAdapter);
public void OnDeleteBtnClick(RoutineDetailAdapter detailAdapter);
}
}
public class RoutineDetailAdapter extends RecyclerView.Adapter<RoutineDetailAdapter.ViewHolder>{
ArrayList<RoutineDetailModel> items = new ArrayList<>();
Context context;
int insertPosition;
int deletePosition;
public void addItem(RoutineDetailModel item) {
items.add(item);
notifyItemInserted(insertPosition);
}
public void deleteItem() {
try {
if(items.size() > 1) { // Leave at least one set
items.remove(deletePosition);
notifyItemRemoved(deletePosition);
deletePosition -= 1;
}
} catch (Exception e) {
// empty
}
}
public ArrayList<RoutineDetailModel> getItem() {
return this.items;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View itemView = inflater.inflate(R.layout.routine_detail_item, parent, false);
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
RoutineDetailModel item = items.get(position);
holder.setItem(item, position);
insertPosition = position + 1;
deletePosition = position;
}
@Override
public int getItemCount() {
return items.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView set;
public ViewHolder(@NonNull View itemView) {
super(itemView);
set = itemView.findViewById(R.id.set);
}
private void setItem(RoutineDetailModel item, int setCount) {
set.setText(setCount + 1 + "set");
}
}
}
public class WriteRoutineActivity extends AppCompatActivity {
Button add_routine_btn;
TextView title;
RecyclerView routine_rv;
RoutineAdapter routineAdapter;
LinearLayoutManager routineLayoutManger;
ArrayList<String> titleData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_write_routine);
initViews();
setPageTitle(getIntent());
setRoutineRecyclerview();
routineAdapter = new RoutineAdapter();
routine_rv.setAdapter(routineAdapter);
add_routine_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
WorkoutListDialogFragment routineDialog = new WorkoutListDialogFragment();
routineDialog.show(getSupportFragmentManager(), "RoutineListDialog");
}
});
routineAdapter.setOnRoutineClickListener(new RoutineAdapter.OnRoutineItemClickListener() {
@Override
public void OnAddBtnClick(RoutineDetailAdapter curDetailAdapter) {
routineAdapter.addDetailItem(curDetailAdapter);
}
@Override
public void OnDeleteBtnClick(RoutineDetailAdapter curDetailAdapter) {
routineAdapter.deleteDetailItem(curDetailAdapter);
}
});
}
private void initViews() {
title = findViewById(R.id.body_part_detail_title);
routine_rv = findViewById(R.id.routine_recyclerview);
add_routine_btn = findViewById(R.id.add_routine);
}
private void setRoutineRecyclerview() {
routineLayoutManger = new LinearLayoutManager(getApplicationContext(), RecyclerView.VERTICAL, false);
routine_rv.setLayoutManager(routineLayoutManger);
routine_rv.setHasFixedSize(true);
RecyclerView.ItemDecoration divider = new DividerItemDecorator(ContextCompat.getDrawable(getApplicationContext(), R.drawable.divider));
routine_rv.addItemDecoration(divider);
}
public void setPageTitle(Intent intent) {
if(intent != null) {
titleData = intent.getStringArrayListExtra("bodypart");
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String new_title = String.join(" / ", titleData);
title.setText(new_title);
}
else {
StringBuilder new_title = new StringBuilder();
for (int i = 0; i < titleData.size(); i++) {
if (i == titleData.size() - 1) {
new_title.append(titleData.get(i));
break;
}
new_title.append(titleData.get(i)).append(" / ");
}
title.setText(new_title);
}
}
}
public void addRoutine(String routine) {
routineAdapter.addItem(new RoutineModel(routine));
routine_rv.smoothScrollToPosition(routineAdapter.getItemCount() - 1);
}
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".data.DailyRecordDetailActivity">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/Theme.AppBarOverlay"
app:elevation="0dp">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/body_part_detail_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="PART"
android:textColor="@color/white"
android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
android:layout_centerHorizontal="true"/>
</RelativeLayout>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
<Button
android:id="@+id/add_routine"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ROUTINE ADD"
android:backgroundTint="@color/light_green"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="@+id/routine_recyclerview"
app:layout_constraintRight_toRightOf="parent"/>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/routine_recyclerview"
android:layout_width="match_parent"
android:layout_height="0dp"
android:scrollbars="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="@+id/add_routine"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@color/white"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp">
<LinearLayout
android:id="@+id/linear_routine"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent">
<TextView
android:id="@+id/routine"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingLeft="10dp"
android:text="ROUTINE"
android:textSize="16dp"
android:textStyle="bold"
android:layout_weight="2"/>
<Button
android:id="@+id/add_set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="?android:selectableItemBackground"
android:text="ADD"
android:textColor="@color/black"
android:gravity="center"
android:layout_weight="1"/>
<Button
android:id="@+id/delete_set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="?android:selectableItemBackground"
android:text="DELETE"
android:textColor="@color/black"
android:layout_weight="1"/>
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/detail_routine"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toBottomOf="@+id/linear_routine"
app:layout_constraintLeft_toLeftOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="5dp"
android:padding="10dp"
android:clipToPadding="false">
<TextView
android:id="@+id/set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="SET"/>
<TextView
android:id="@+id/weight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="0 kg"/>
<TextView
android:id="@+id/reps"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="0"/>
</LinearLayout>
public class RoutineAdapter extends RecyclerView.Adapter<RoutineAdapter.ViewHolder> {
Context context;
ArrayList<RoutineModel> routineItems = new ArrayList<>();
//public RoutineDetailAdapter detailAdapter; //TODO move it to local variable in method onCreateViewHolder
OnRoutineItemClickListener listener;
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
View itemView = inflater.inflate(R.layout.routine_item, parent, false);
ViewHolder holder = new ViewHolder(itemView);
RoutineDetailAdapter detailAdapter = new RoutineDetailAdapter(); //TODO Create local variable
detailAdapter.addItem(new RoutineDetailModel());
holder.setRoutineDetailRecyClerView();
holder.rv_detail.setAdapter(detailAdapter);
return holder;
}
public class MultipleViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private List<Object> items; //List<Object or Generic class or abstarct base Model class parent of Routine and RoutineDetails>
private OnItemClickListener listener; //TODO new interface
..............
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == 1){
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.routine_item, parent, false);
return new RoutineViewHolder (itemView);
}/*else{*/
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.routine_detail_item, parent, false);
return new RoutineDetailsViewHolder (itemView);
//}
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
Object object = items.get(position); //Object or Generic class or abstarct base Model class parent of Routine and RoutineDetails>
if(object instanceof RoutineModel) {
//create method
updateRoutineViews((RoutineViewHolder) holder, (RoutineModel) object, position);
}else if(object instanceof RoutineDetailsModel) {
//create method
updateRoutineDetailsViewHolder((RoutineDetailsViewHolder) holder, (RoutineDetailModel) object);
}
}
@Override
public int getItemViewType(int position) {
Object object = items.get(position);
if(object instanceof RoutineModel){
return 1;
}
//else if instanceOf RoutineDetailModel return 0
return 0;
}
List<Object> mixedList = new ArrayList<>();
for(RoutineModel rm: routineList){
mixedList.add(rm);
if(rm has routineDetailModels){ //pseudo code
for(RoutineDetailModels rmdetilas: rm.getRoutineDetailModels()){
mixedList.add(rmdetilas);
}
}
}
adpater.swapData(mixedList); //create your method to swap or set data to adapter
public interface OnItemClickListener{
void onClick(View view, int position);
void onLongClick(View view, int position);
}
adapter.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onClick(View view, int position) {
Object item = (Object) adapter.getItem(position);
if(item instanceof Routine) {
if (view.getId() == R.id.delete_id) {
//TODO delete form list, notifyItemRemoved or generate all mixeddata again and swap
} else if (view.getId() == R.id.whateveryouwant) {
//TODO doSomething()
}
}
}
@Override
public void onLongClick(View view, int position) {
}
});
public class RoutineViewHolder extends RecyclerView.ViewHolder {
public RecyclerView rv_detail;
public TextView routine;
public Button addSet;
public Button deleteSet;
public ViewHolder(@NonNull View itemView) {
super(itemView);
//initViews(); in constructor
routine = itemView.findViewById(R.id.routine);
rv_detail = itemView.findViewById(R.id.detail_routine);
addSet = itemView.findViewById(R.id.add_set);
deleteSet = itemView.findViewById(R.id.delete_set);
}
}
private void updateRoutineViews(RoutineViewHolder holder, RoutineModel routineItem, position){
holder.routine.setText(routineItem.getRoutine());
holder.rv_detail.setText(routineItem.getWhateverYouWant());
holder.deleteSet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.onClick(v, position); //or holder.getAdapterPosition()
}
});
}
public class RoutineActivity extends AppCompatActivity {
private MultipleViewAdapter adapter;
private List<RoutineModel> routineList;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_routine);
RecyclerView contentList = findViewById(R.id.list);
contentList.setLayoutManager(new LinearLayoutManager(this));
adapter = new MultipleViewAdapter(this, new ArrayList<>());
contentList.setAdapter(adapter);
adapter.setOnItemClickListener(new MultipleViewAdapter.OnItemClickListener() {
@Override
public void onClick(View view, int position) {
Object item = (Object) adapter.getItem(position);
if(item instanceof RoutineModel) {
RoutineModel routineModel = (RoutineModel) item;
if (view.getId() == R.id.add_set) {
int weight = randomInt(99);
Toast.makeText(RoutineActivity.this, "New item with weight: " + weight + " kg", Toast.LENGTH_SHORT).show();
routineModel.addDetails(new RoutineDetailsModel(routineModel.getDetailsSize() + 1, weight));
adapter.swapData(getMixedList()); // OR add item to adapter and notify item inserted
//TODO implement SnappingLinearLayoutManager and set list.smoothScroleto... routineModel
} else if (view.getId() == R.id.delete_set) {
//TODO doSomething()
boolean deleted = routineModel.removeDetails(routineModel.getDetailsSize() - 1); // -1 !!! to delete last item
Toast.makeText(RoutineActivity.this, deleted ? "Last item is deleted": "No more items", Toast.LENGTH_SHORT).show();
adapter.swapData(getMixedList()); // OR remove item from adapter and notify item removed
//TODO implement SnappingLinearLayoutManager and set list.smoothScroleto.... routineModel
}
}else if(item instanceof RoutineDetailsModel) {
RoutineDetailsModel routineModel = (RoutineDetailsModel) item;
Toast.makeText(RoutineActivity.this, "Weight: " + routineModel.getWeight() + " kg", Toast.LENGTH_SHORT).show();
//TODO EDITED 4 (copy/paste this) random new Weight
routineModel.setWeight(randomInt(99));
adapter.notifyItemChanged(position);
Toast.makeText(RoutineActivity.this, "New Weight: " + routineModel.getWeight() + " kg", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onLongClick(View view, int position) {
}
});
initFakeData();
adapter.swapData(getMixedList());
}
private List<Object> getMixedList() {
List<Object> mixedList = new ArrayList<>();
for(RoutineModel rm: routineList){
mixedList.add(rm);
if(rm.getRoutineDetailsModel() != null && rm.getRoutineDetailsModel().size() > 0){
for(RoutineDetailsModel rmdetilas: rm.getRoutineDetailsModel()){
mixedList.add(rmdetilas);
}
}
}
return mixedList;
}
private void initFakeData() {
routineList = new ArrayList<>();
for(int i = 0; i < 5; i++){
RoutineModel routineModel = new RoutineModel(String.valueOf(i + 1));
for(int j = 0; j < 4; j++){
routineModel.addDetails(new RoutineDetailsModel(j+1, randomInt(99)));
}
routineList.add(routineModel);
}
}
private int randomInt(int max) {
return (int) Math.floor(Math.random() * max);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
public class MultipleViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final Context context; // TODO only if you need conetxt
private List<Object> items;
private OnItemClickListener onItemClickListener;
public MultipleViewAdapter(Context context, List<Object> items) {
this.context = context;
this.items = items;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == 1){
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.routine_item, parent, false);
return new RoutineViewHolder(itemView);
}/*else{*/
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.routine_detail_item, parent, false);
return new RoutineDetailsViewHolder(itemView);
//}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
Object object = items.get(position); //Object or Generic class or abstarct base Model class parent of Routine and RoutineDetails>
if(object instanceof RoutineModel) {
updateRoutineViews((RoutineViewHolder) holder, (RoutineModel) object, position);
}else if(object instanceof RoutineDetailsModel) {
updateRoutineDetailsViewHolder((RoutineDetailsViewHolder) holder, (RoutineDetailsModel) object, position);
}
}
private void updateRoutineViews(RoutineViewHolder holder, RoutineModel routineItem, int position){
holder.routine.setText("Routine " + routineItem.getRoutine());
holder.addSet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(onItemClickListener != null) onItemClickListener.onClick(v, position);
}
});
holder.deleteSet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(onItemClickListener != null) onItemClickListener.onClick(v, position);
}
});
}
private void updateRoutineDetailsViewHolder(RoutineDetailsViewHolder holder, RoutineDetailsModel routineDetailsModel, int position){
holder.set.setText(routineDetailsModel.getSet() + " set");
holder.weight.setText(routineDetailsModel.getWeight() + " kg");
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(onItemClickListener != null) onItemClickListener.onClick(v, position);
}
});
}
@Override
public int getItemViewType(int position) {
Object object = items.get(position);
if(object instanceof RoutineModel){
return 1;
}
//else if instanceOf RoutineDetailModel return 0
return 0;
}
@Override
public int getItemCount() {
if(items == null) return 0;
return items.size();
}
public Object getItem(int position) {
if(this.items == null || position < 0 || position >= this.items.size()) return null;
return this.items.get(position);
}
public void swapData(List<Object> newItems) {
if (newItems != null) {
this.items = newItems;
notifyDataSetChanged();
}
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
public interface OnItemClickListener{
void onClick(View view, int position);
void onLongClick(View view, int position);
}
public static class RoutineViewHolder extends RecyclerView.ViewHolder {
public TextView routine;
public Button addSet;
public Button deleteSet;
public RoutineViewHolder(@NonNull View itemView) {
super(itemView);
//initViews(); in constructor
routine = itemView.findViewById(R.id.routine);
addSet = itemView.findViewById(R.id.add_set);
deleteSet = itemView.findViewById(R.id.delete_set);
}
}
public static class RoutineDetailsViewHolder extends RecyclerView.ViewHolder {
public TextView set;
public TextView weight;
public RoutineDetailsViewHolder(@NonNull View itemView) {
super(itemView);
set = itemView.findViewById(R.id.set);
weight = itemView.findViewById(R.id.weight);
}
}
}
public class RoutineModel {
private List<RoutineDetailsModel> routineDetailsList;
private String routine;
public RoutineModel(String routine) {
this.routine = routine;
}
public List<RoutineDetailsModel> getRoutineDetailsModel() {
return routineDetailsList;
}
public void setRoutineDetailsModel(List<RoutineDetailsModel> routineDetailsModel) {
this.routineDetailsList = routineDetailsModel;
}
public void addDetails(RoutineDetailsModel item) {
if(routineDetailsList == null) {
routineDetailsList = new ArrayList<>();
}
this.routineDetailsList.add(item);
}
public boolean removeDetails(int index) {
if(routineDetailsList == null || index >= routineDetailsList.size() || index < 0) return false;
this.routineDetailsList.remove(index);
return true;
}
public String getRoutine() {
return routine;
}
public void setRoutine(String routine) {
this.routine = routine;
}
public int getDetailsSize() {
if(routineDetailsList == null) return 0;
return routineDetailsList.size();
}
}
public class RoutineDetailsModel {
private int set;
private int weight;
public RoutineDetailsModel(int set, int weight) {
this.set = set;
this.weight = weight;
}
public int getSet() {
return set;
}
public void setSet(int set) {
this.set = set;
}
public int getWeight() {
return weight;
}
public void setWeight(int weight) {
this.weight = weight;
}
}