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(android) Problems with random changes in dynamic nested recycler view items

Hi,
I'm making a dynamic Nested RecyclerView.
The Outer RecyclerView (Routine) consists of parts (A, B, C...), add button,
and delete button, and the inner RecyclerView (Detail Routine) consists of text view (set, weight and count).
When i add an outer item, it have one inner RecyclerView item by default.
I thought the implementation was successful, but it wasn't.
The picture is a condition that I have made some items in advance.
This is a picture that creates additional items there.
However, in the picture, when I added the G item, you can see that the F item
and the B item have a change.
And the G item, oddly enough, has two basic items. Originally, it is one.
The second picture is the later item addition.
If i add a new outer recyclerview item, there will be a new change in the whole
item again.
I am not sure why this change is happening. If you add a new item, you want the
existing item to remain.
Please tell me the cause
Here is Code
RoutineAdapter.java ( Outer RecyclerView Adpater )
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);
}
}
RoutineDetailAdapter.java ( Inner RecyclerView Adapter )
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");
}
}
}
WriteRoutineActivity.java
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);
}
}
ADDED
Main.xml
<?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>
RoutineItem.xml
<?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>
RoutineDetail.xml
<?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>

For every RoutineModel item you recreate detailAdapter but you need new instance. Check TODO in code below:
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;
like this
#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;
}
But this is not good way to solve this... Its better to use one Adapter with multiple item views. I have no time now to explain, I will post some code later...
EDITED
I had same problem and and solved this on this (better) way:
Create Adapter that support multiple views
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
..............
}
Override onCreateViewHolder like this
#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 onBindViewHolder like this and create your updateViews methods
#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);
}
}
and override getItemViewType method
#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;
}
This is so simple and better for performance...
Also in OnItemClickListener get item by position and check instanceOf object like above. You can add new item to the clickedItemPosition + 1 with adapter.notifyDataSetChanges()
In MainActivity you have to create mixed list with Routine and Routine details
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
EDITED
handle click
public interface OnItemClickListener{
void onClick(View view, int position);
void onLongClick(View view, int position);
}
and
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) {
}
});
The code above is just an example of how to solve the problem
For more help feel free to comment
EDITED 2
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);
}
}
update method called from onBindViewHolder
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()
}
});
}
COMPLETE CODE
Create complete new app to test it and understand (copy/paste this code), then integrate in your app...
There are more improvements but I don't have time, this is a quick fix
Activity
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);
}
}
Activity Layout
<?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>
Adapter
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);
}
}
}
RoutineModel
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();
}
}
RoutineDetailsModel
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;
}
}
Item layouts
Find in question: routine_item.xml and routine_detail_item.xml

RecyclerView can’t load an image of banner and data listitem

The RecycleView lives in a in Fragment.
it has a banner as headview and listitem.
The app can run,but can't load images and data of item.
It only has the banner of INDICATOR and its img title to run.
The logcat warns about it:
18204-18204/newsdaily.annle.com.happyreading_original2018718v0013
W/View: requestLayout() improperly called by
android.view.View{945cd0e V.ED..... ......ID 9336,141-9564,150}
during layout: running second layout pass
package newsdaily.annle.com.**.homepage;
import com.youth.banner.Banner;
import com.youth.banner.BannerConfig;
import com.youth.banner.Transformer;
import com.youth.banner.listener.OnBannerListener;
import com.youth.banner.loader.ImageLoader;
public class ChildFragment extends Fragment {
private HomePagerArticleAdapter homePagerArticleAdapter;
private RecyclerView recycleView;
private RecyclerView.LayoutManager layoutManager;
private ArrayList<HpItemArticle> articleList = new ArrayList<>();
private Banner banner;
private ArrayList<String> titles;
private ArrayList<Integer> images;
private View header;
private View view;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = LayoutInflater.from(getActivity()).inflate(R.layout.homepage_list_fragment, container, false);
Log.i("dfdfff开始", "有没有进入");
initData();
initRecycleView();
return view;
}
private void initData() {
for (int i = 0; i < 15; i++) {
HpItemArticle hpItemArticle = new HpItemArticle(
i,
"数据标题" + i,
"内容究竟是什么，我也不知道，就乱写先吧hhhhhhh" + i,
R.mipmap.ic_launcher);
articleList.add(i, hpItemArticle);
}
images = new ArrayList<>();
images.add(R.drawable.pic0);
images.add(R.drawable.pic1);
images.add(R.drawable.pic2);
titles = new ArrayList<>();
titles.clear();
for (int i = 0; i < images.size(); i++) {
titles.add("第" + i + "张图片");
}
}
private void initRecycleView() {
recycleView = (RecyclerView) view.findViewById(R.id.homepage_rcv_article);
layoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
recycleView.setLayoutManager(layoutManager);
recycleView.setItemAnimator(new DefaultItemAnimator());
recycleView.setHasFixedSize(true);
initBanner();
homePagerArticleAdapter = new HomePagerArticleAdapter(getContext());
homePagerArticleAdapter.setmHeaderView(header);
homePagerArticleAdapter.addListData(articleList);
homePagerArticleAdapter.notifyDataSetChanged();
recycleView.setAdapter(homePagerArticleAdapter);
layoutManager.setItemPrefetchEnabled(false);
}
private void initBanner() {
header = LayoutInflater.from(view.getContext()).inflate(R.layout.homepage_news_header, null);
banner = (Banner) header.findViewById(R.id.banner);
//设置图片加载器
banner.setImageLoader(new FragmentImageLoader());
banner.setImages(images);
banner.setBannerTitles(titles);
banner.isAutoPlay(true);
//设置轮播时间
banner.setDelayTime(1500);
banner.start();
banner.setOnBannerListener(new OnBannerListener() {
#Override
public void OnBannerClick(int position) {
Log.i("---184--", "第" + position + "张轮播图点击了！");
}
});
}
private class FragmentImageLoader extends ImageLoader {
#Override
public void displayImage(Context context, Object path, ImageView imageView) {
Glide.with(getActivity()).load(path).into(imageView);
}
}
}
package newsdaily.annle.com.**.adapter;
/**
* 首页新闻列表适配器，头部banner，下面文章列表
* Created by 11581 on 2018/9/28.
*/
public class HomePagerArticleAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
private View homepageHeadView;
te ArrayList<HpItemArticle> listData = new ArrayList<>();
private LayoutInflater mLayoutInflater;
private OnItemClickListener itemClickListener;
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
itemClickListener = onItemClickListener;
}
public View getmHeaderView() {
return homepageHeadView;
}
public void setmHeaderView(View headerview) {
homepageHeadView = headerview;
notifyItemInserted(0);//插入下标0位置
}
public int getTypeItem(int position) {
if (homepageHeadView == null) return TYPE_ITEM;
if (position == 0) return TYPE_HEADER;
return TYPE_ITEM;
}
public HomePagerArticleAdapter(Context context) {
mLayoutInflater = LayoutInflater.from(context);
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (homepageHeadView != null && viewType == TYPE_HEADER)
return new ItemArticleViewHolder(homepageHeadView);
View view =
LayoutInflater.from(parent.getContext()).inflate(R.layout.homepage_news_item, parent, false);
return new ItemArticleViewHolder(view);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
if (getItemViewType(position) == TYPE_HEADER) return;
final int pos = getPosition(holder);
final HpItemArticle data = listData.get(pos);
if (holder instanceof ItemArticleViewHolder) {
//转型为了便捷
ItemArticleViewHolder newHolder = (ItemArticleViewHolder) holder;
newHolder.hpItemArticleTitle.setText(data.getTitle());
newHolder.hpItemArticleImage.setImageResource(data.getImages());
newHolder.hpItemArticleImage.setImageResource(data.getImages());
if (itemClickListener == null) return;
((ItemArticleViewHolder) holder).itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
itemClickListener.onItemClick(position, listData.get(position).getTitle());
}
});
}
}
#Override
public int getItemCount() {
return homepageHeadView == null ? listData.size() : listData.size() + 1;
}
public int getPosition(RecyclerView.ViewHolder holder) {
int position = holder.getLayoutPosition();
return homepageHeadView == null ? position : position - 1;
}
#Override
public long getItemId(int position) {
return position;
}
public void addListData(ArrayList<HpItemArticle> datas) {
if (datas != null) {
listData.clear();
}
listData.addAll(datas);
notifyDataSetChanged();
}
public class ItemArticleViewHolder extends RecyclerView.ViewHolder {
ImageView hpItemArticleImage;
TextView hpItemArticleTitle;
TextView hpItemArticleDetails;
public ItemArticleViewHolder(View itemView) {
super(itemView);
if (itemView == homepageHeadView) return;
hpItemArticleImage = (ImageView) itemView.findViewById(R.id.hp_item_article_image);
hpItemArticleDetails = (TextView) itemView.findViewById(R.id.hp_item_article_details);
hpItemArticleTitle = (TextView) itemView.findViewById(R.id.hp_item_article_title);
ButterKnife.bind(this, itemView);
}
}
public interface OnItemClickListener {
void onItemClick(int position, String data);
}
}
My English is not good.Thanks in advance.
banner.xml. header of RecyclerView
<?xml version="1.0" encoding="utf-8"?>
<com.youth.banner.Banner
android:id="#+id/banner"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginStart="15dp"
android:layout_marginEnd="15dp"
xmlns:android="http://schemas.android.com/apk/res/android" />
RecyclerView item layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/hp_item_article_image"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
app:srcCompat="#mipmap/ic_launcher_round" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/hp_item_article_image"
android:orientation="vertical">
<TextView
android:id="#+id/hp_item_article_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="#string/homepage_article_title"
tools:ignore="HardcodedText" />
<TextView
android:id="#+id/hp_item_article_details"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:text="#string/homepage_article_details" />
</LinearLayout>
</RelativeLayout>

Inserting an empty row dynamically in Horizontal Recyclerview

I'm just one step to getting this dynamic layout work for me but I just cant figure out what I'm doing wrong.
I have the following string:
AAA__AB/
_AAAAAA/
_AAABBB/
I'm supposed to convert the above strings to a rooms layout whereby:
A - Represents available rooms
B - Represents booked rooms
_ - Represents a space
/ - Represents a new line
I have been following this tutorial Dynamic bus seats layout to try and make an app that can create Apartment rooms layout dynamically in RecyclerView.
I have a horizontally oriented recyclerview as the parent recyclerView. I have an adapter and a data source from a webserver.
Everything is working fine apart from the NEW_LINE feature which is supposed to force the recyclerview add a new line/row so that the rest of the views may align themselves in the new row/line
Please help
The following is what I get
The way my layout looks like as at now
The following is what I want
The intended layout
The Main Activity.java
...rest of the code
//Displaying the rooms and trying to make the layout
private void display_rooms_details(){
ArrayList house_rooms;
house_rooms=new ArrayList<>();
for (int i = 0; i < rooms_list.size(); i++)
{
if(rooms_list.get(i).getType()==0){
house_rooms.add(new Decode_rooms(Decode_rooms.AVAILABLE_ROOMS, rooms_list.get(i).getRoom_type(), rooms_list.get(i).getRoom_number(), rooms_list.get(i).getRoom_name(), rooms_list.get(i).getRoom_symbol(), rooms_list.get(i).getRoom_tenant()));
}
if(rooms_list.get(i).getType()==1){
house_rooms.add(new Decode_rooms(Decode_rooms.BOOKED_ROOMS, rooms_list.get(i).getRoom_type(), rooms_list.get(i).getRoom_number(), rooms_list.get(i).getRoom_name(), rooms_list.get(i).getRoom_symbol(), rooms_list.get(i).getRoom_tenant()));
}
if(rooms_list.get(i).getType()==2){
house_rooms.add(new Decode_rooms(Decode_rooms.NEW_LINE, rooms_list.get(i).getRoom_type(), rooms_list.get(i).getRoom_number(), rooms_list.get(i).getRoom_name(), rooms_list.get(i).getRoom_symbol(), rooms_list.get(i).getRoom_tenant()));
}
if(rooms_list.get(i).getType()==3){
house_rooms.add(new Decode_rooms(Decode_rooms.SPACE, rooms_list.get(i).getRoom_type(), rooms_list.get(i).getRoom_number(), rooms_list.get(i).getRoom_name(), rooms_list.get(i).getRoom_symbol(), rooms_list.get(i).getRoom_tenant()));
}
}
RecyclerView myrv= findViewById(R.id.recycleview_item_list);
Adapter_display_rooms myAdapter= new Adapter_display_rooms(this,house_rooms);
myrv.setLayoutManager(new LinearLayoutManager(this, OrientationHelper.HORIZONTAL,false));
myrv.setItemAnimator(new DefaultItemAnimator());
myrv.setAdapter(myAdapter);
}
Adapter_display_rooms
public class Adapter_display_rooms extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
//Declare context and the class with our list
private static Context mContext;
int total_types;
private static ArrayList<Decode_rooms> rooms_list; //Our data class... this one contains the get and set methods to decode the data for us
//Available rooms layout class
public static class ActualRoomsViewHolder extends RecyclerView.ViewHolder {
CardView cardview;
TextView txtType;
ImageView image;
public ActualRoomsViewHolder(View itemView) {
super(itemView);
this.cardview= itemView.findViewById(R.id.layout_available_rooms);
this.image = itemView.findViewById(R.id.room_icon);
this.txtType = itemView.findViewById(R.id.room_name);
}
}
//New Line layout class
public static class NewLineViewHolder extends RecyclerView.ViewHolder {
LinearLayout linearlayout;
public NewLineViewHolder(View itemView) {
super(itemView);
this.linearlayout = itemView.findViewById(R.id.layout_newline);
}
}
//New Line layout class
public static class AddSpaceViewHolder extends RecyclerView.ViewHolder {
TextView txtType;
public AddSpaceViewHolder(View itemView) {
super(itemView);
this.txtType = itemView.findViewById(R.id.add_space);
}
}
//END OF VIEWHOLDER CLASSES
//The Class Constructor
public Adapter_display_rooms(Context mContext, ArrayList<Decode_rooms> rooms_list) {
this.mContext = mContext;
this.rooms_list = rooms_list;
total_types=rooms_list.size();
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view;
switch (viewType) {
case Decode_rooms.AVAILABLE_ROOMS:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_rooms_layout_listview_rooms, parent, false);
return new ActualRoomsViewHolder(view);
case Decode_rooms.BOOKED_ROOMS:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_rooms_layout_listview_rooms, parent, false);
return new ActualRoomsViewHolder(view);
case Decode_rooms.NEW_LINE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_rooms_layout_listview_newline, parent, false);
return new NewLineViewHolder(view);
case Decode_rooms.SPACE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_rooms_layout_listview_space, parent, false);
return new AddSpaceViewHolder(view);
}
return null;
}
#Override
public int getItemViewType(int position) {
switch (rooms_list.get(position).type) {
case 0:
return Decode_rooms.AVAILABLE_ROOMS;
case 1:
return Decode_rooms.BOOKED_ROOMS;
case 2:
return Decode_rooms.NEW_LINE;
case 3:
return Decode_rooms.SPACE;
default:
return -1;
}
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
final Decode_rooms object = rooms_list.get(position);
if (object != null) {
switch (object.type) {
case Decode_rooms.AVAILABLE_ROOMS:
((ActualRoomsViewHolder) holder).image.setImageResource(R.drawable.ic_seats_book);
((ActualRoomsViewHolder) holder).txtType.setText(object.getRoom_number());
((ActualRoomsViewHolder) holder).cardview.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(mContext, Available_room_details.class);
intent.putExtra("room_number",object.getRoom_number());
intent.putExtra("room_name",object.getRoom_name());
intent.putExtra("room_type",object.getRoom_type());
mContext.startActivity(intent);
}
});
((ActualRoomsViewHolder) holder).cardview.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
//Creating the instance of PopupMenu
PopupMenu popup = new PopupMenu(mContext,v);
//Inflating the Popup using xml file
popup.getMenuInflater()
.inflate(R.menu.menu_available_room_options, popup.getMenu());
//registering popup with OnMenuItemClickListener
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(
mContext,
"You Clicked : " + item.getTitle(),
Toast.LENGTH_SHORT
).show();
return true;
}
});
popup.show(); //showing popup menu
return false;
}
});
break;
case Decode_rooms.BOOKED_ROOMS:
((ActualRoomsViewHolder) holder).image.setImageResource(R.drawable.ic_seats_booked);
((ActualRoomsViewHolder) holder).txtType.setText(object.getRoom_number());
((ActualRoomsViewHolder) holder).cardview.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(mContext, Booked_room_details.class);
intent.putExtra("room_number",object.getRoom_number());
intent.putExtra("room_name",object.getRoom_name());
intent.putExtra("room_type",object.getRoom_type());
mContext.startActivity(intent);
}
});
((ActualRoomsViewHolder) holder).cardview.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
//Creating the instance of PopupMenu
PopupMenu popup = new PopupMenu(mContext,v);
//Inflating the Popup using xml file
popup.getMenuInflater()
.inflate(R.menu.menu_booked_room_options, popup.getMenu());
//registering popup with OnMenuItemClickListener
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(
mContext,
"You Clicked : " + item.getTitle(),
Toast.LENGTH_SHORT
).show();
return true;
}
});
popup.show(); //showing popup menu
return false;
}
});
break;
case Decode_rooms.NEW_LINE:
break;
case Decode_rooms.SPACE:
((AddSpaceViewHolder) holder).txtType.setText("Space "+object.getRoom_number());
break;
default:
((ActualRoomsViewHolder) holder).txtType.setText("Default "+object.getRoom_number());
break;
}
}
}
#Override
public int getItemCount() {
return rooms_list.size();
}
Decode rooms java
public class Decode_rooms {
//Aid the custom adapter in inflating different types of layouts
public static final int AVAILABLE_ROOMS = 0;
public static final int BOOKED_ROOMS = 1;
public static final int NEW_LINE = 2;
public static final int SPACE = 3;
String room_type,room_number,room_name,room_symbol,room_tenant;
public int type; //This variable will hold the type of data i.e THE ROOM SYMBOL .. It'll tell the adapter the layout to inflate
public Decode_rooms(int type,String room_type, String room_number, String room_name, String room_symbol, String room_tenant) {
this.type = type;
this.room_type = room_type;
this.room_number = room_number;
this.room_name = room_name;
this.room_symbol = room_symbol;
this.room_tenant = room_tenant;
}
//The setter methods
public void setType(int type) {
this.type = type;
}
public void setRoom_type(String room_type) {
this.room_type = room_type;
}
public void setRoom_number(String room_number) {
this.room_number = room_number;
}
public void setRoom_name(String room_name) {
this.room_name = room_name;
}
public void setRoom_symbol(String room_symbol) {
this.room_symbol = room_symbol;
}
public void setRoom_tenant(String room_tenant) {
this.room_tenant = room_tenant;
}
//The getter methods
public int getType() {
return type;
}
public String getRoom_type() {
return room_type;
}
public String getRoom_number() {
return room_number;
}
public String getRoom_name() {
return room_name;
}
public String getRoom_symbol() {
return room_symbol;
}
public String getRoom_tenant() {
return room_tenant;
}
}
Parent xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/recyclerview" />
</android.support.design.widget.CoordinatorLayout>
The recyclerView
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycleview_item_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
android:background="#color/blue"
android:elevation="2dp"
android:layout_margin="10dp"/>
</android.support.constraint.ConstraintLayout>
The Card view / Individual row item for rooms
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_available_rooms"
android:clickable="true"
android:foreground="?android:attr/selectableItemBackground"
android:layout_width="#dimen/room_width"
android:layout_height="#dimen/room_height"
android:layout_margin="#dimen/roomGaping"
android:orientation="horizontal"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/room_icon"
android:background="#color/black"
android:layout_width="match_parent"
android:layout_height="#dimen/room_width"
android:scaleType="centerCrop"/>
<TextView
android:id="#+id/room_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#2d2d2d"
android:textSize="13sp"
android:text="Room Name"/>
</LinearLayout>
</android.support.v7.widget.CardView>
The new line layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_newline"
android:layout_width="match_parent"
android:layout_height="#dimen/room_height"
android:background="#color/grey_background"
android:orientation="horizontal">
</LinearLayout>

What you want is GridLayoutManager with column count of maximum of length of all rows. (You can set it as lcm of length of all inputs)
Iterate through each input and set column span as required. Let me know if anything is not clear.
Edit: Adding sample code
TestActivity.java
public class TestActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
mRecyclerView = findViewById(R.id.recycler_view);
final String[] inputs = new String[3];
inputs[0] = "AAA__AB/";
inputs[1] = "_AAAAAA/";
inputs[2] = "_ABB/";
final StringBuilder sb = new StringBuilder();
for(int i =0; i < inputs.length; i++) {
sb.append(inputs[i]);
}
String[] modifiedInput = sb.toString().split("/");
final int lcm = getLcm(modifiedInput);
GridLayoutManager manager = new GridLayoutManager(getApplicationContext(), lcm);
manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
#Override
public int getSpanSize(int i) {
if(sb.toString().charAt(i) == '/') {
return lcm;
}
else {
int index = 0;
for(int j = 0; j< inputs.length; j++) {
if(i < index+inputs[j].length()) {
if(inputs[j].contains("/")) return lcm / (inputs[j].length()-1);
else return lcm / inputs[j].length();
}
else {
index += inputs[j].length();
}
}
throw new IllegalStateException("Wrong index");
}
}
});
List<String> inputDataList = new ArrayList<>();
String flatInputData = sb.toString();
for(int i = 0; i < flatInputData.length(); i++) {
inputDataList.add(String.valueOf(flatInputData.charAt(i)));
}
Adapter adapter = new Adapter(inputDataList);
mRecyclerView.setAdapter(adapter);
mRecyclerView.setLayoutManager(manager);
}
private int getLcm(String[] modifiedInputs) {
int lcm = modifiedInputs[0].length();
for(int i = 1; i< modifiedInputs.length; i++) {
lcm = lcm(lcm, modifiedInputs[i].length());
}
return lcm;
}
public static int lcm(int a, int b) {
return a/gcd(a,b) * b;
}
public static int gcd(int a, int b){
if (a<b) return gcd(b,a);
if (a%b==0) return b;
else return gcd(b, a%b);
}
}
Adapter.java
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
public List<String> data;
public Adapter(List<String> data) {
this.data = data;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
return new ViewHolder(LayoutInflater.from(viewGroup.getContext()).inflate(android.R.layout.simple_list_item_1, viewGroup, false));
}
#Override
public void onBindViewHolder(#NonNull ViewHolder viewHolder, int i) {
String text = data.get(i);
if(!text.equals("/"))
viewHolder.textView.setText(text);
}
#Override
public int getItemCount() {
if(data == null) {
return 0;
}
else {
return data.size();
}
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public ViewHolder(#NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(android.R.id.text1);
}
}
}

android:The specified child already has a parent. You must call removeView()

I have an activity which opens a fragment with view pager.
when I change between the tabs I get this error:
The specified child already has a parent. You must call removeView() on the child's parent first.
I think is the problem is from the header of the RecyclerView and I posted a new question about it here
the view pager code is:
private void mViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new a_Frag(), getString("A"));
adapter.addFragment(new b_Frag(), getString("B"));
adapter.addFragment(new c_Frag(), getString("C"));
viewPager.setAdapter(adapter);
}
the a_frag code as example:
public class a_Frag extends Fragment {
RecyclerView recyclerView;
public a_Frag() {
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.rv, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.rv);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(new a_Adapter(getContext(), R.layout.group_header));
return recyclerView;
}
ExpandableRecyclerView code:
public class ExpandableRecyclerView extends RecyclerView {
public ExpandableRecyclerView(Context context) {
super(context, null);
initRecycler();
}
public ExpandableRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
initRecycler();
}
public ExpandableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initRecycler();
}
private void initRecycler() {
setClipToPadding(false);
setItemAnimator(new DefaultItemAnimator());
}
#Override
public Parcelable onSaveInstanceState() {
//begin boilerplate code that allows parent classes to save state
Parcelable superState = super.onSaveInstanceState();
SavedState ss = new SavedState(superState);
//end
if (getAdapter() != null)
ss.stateToSave = ((Adapter) this.getAdapter()).getExpandedGroups();
return ss;
}
#Override
public void onRestoreInstanceState(Parcelable state) {
//begin boilerplate code so parent classes can restore state
if (!(state instanceof SavedState)) // if state is not instance of out SaveState just restore in reg way
{
super.onRestoreInstanceState(state);
return;
}
// else if cast him to SavedState
SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
//end
if (getAdapter() != null)
((Adapter) getAdapter()).setExpandedGroups(ss.stateToSave);
}
#Override
public void setAdapter(RecyclerView.Adapter adapter) {
if (!(adapter instanceof Adapter))
throw new IllegalArgumentException("adapter has to be of type ExpandableRecyclerView.Adapter");
super.setAdapter(adapter);
}
public interface OnChildItemClickedListener {
void onChildItemClicked(int group, int position);
}
static class SavedState implements Parcelable {
public static final SavedState EMPTY_STATE = new SavedState() {
};
//required field that makes Parcelables from a Parcel
public static final Creator<SavedState> CREATOR =
new Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
SparseBooleanArray stateToSave;
Parcelable superState;
SavedState() {
superState = null;
}
SavedState(Parcelable superState) {
this.superState = superState != EMPTY_STATE ? superState : null;
}
private SavedState(Parcel in) {
Parcelable superState = in.readParcelable(ExpandableRecyclerView.class.getClassLoader());
this.superState = superState != null ? superState : EMPTY_STATE;
this.stateToSave = in.readSparseBooleanArray();
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(#NonNull Parcel out, int flags) {
out.writeParcelable(superState, flags);
out.writeSparseBooleanArray(this.stateToSave);
}
public Parcelable getSuperState() {
return superState;
}
}
public static abstract class Adapter<CVH extends ViewHolder, GVH extends ViewHolder, C, G> extends RecyclerView.Adapter<ViewHolder> {
private static final int TYPE_HEADER = 0;
SparseBooleanArray expanded = new SparseBooleanArray();
private OnChildItemClickedListener onChildItemClickedListener;
public Adapter() {
}
boolean isExpanded(int group) {
return expanded.get(group);
}
SparseBooleanArray getExpandedGroups() {
return expanded;
}
public void setExpandedGroups(SparseBooleanArray expanded) {
this.expanded = expanded;
}
public void expand(int group) {
if (isExpanded(group))
return;
// this lines of code calculate number of shown item in recycler view. also group is counting .
int position = 0;
for (int i = 0; i < group; i++) {
position++;
if (isExpanded(i))
position += getChildItemCount(i);
}
position++; // this for percent group
notifyItemRangeInserted(position, getChildItemCount(group)); // notify recycler view for expanding
expanded.put(group, true); // save expanding in sparce array
}
public void collapse(int group) {
if (!isExpanded(group)) // if is not expanded . so nothing to collapse.
return;
int position = 0;
for (int i = 0; i < group; i++) {
position++;
if (isExpanded(i))
position += getChildItemCount(i); // item
}
position++;
notifyItemRangeRemoved(position, getChildItemCount(group));
expanded.put(group, false);
}
public abstract int getGroupItemCount();
public abstract int getChildItemCount(int group);
#Override
public int getItemCount() {
int count = 0;
for (int i = 0; i <= getGroupItemCount(); i++) {
count += isExpanded(i) ? getChildItemCount(i) + 1 : 1;
}
return count;
}
public abstract G getGroupItem(int position);
public abstract C getChildItem(int group, int position);
public Object getItem(int i) {
int group = 0;
while (group <= getGroupItemCount()) {
if (i > 0 && !isExpanded(group)) {
i--;
group++;
continue;
}
if (i > 0 && isExpanded(group)) {
i--;
if (i < getChildItemCount(group))
return getChildItem(group, i);
i -= getChildItemCount(group);
group++;
continue;
}
if (i == 0)
return getGroupItem(group);
}
throw new IndexOutOfBoundsException();
}
#Override
public void onBindViewHolder(ViewHolder holder, int i) {
int group = 0;
while (group <= getGroupItemCount()) {
if (i > 0 && !isExpanded(group)) {
i--;
group++;
continue;
}
if (i > 0 && isExpanded(group)) {
i--;
if (i < getChildItemCount(group)) {
onBindChildViewHolder((CVH) holder, group, i);
return;
}
i -= getChildItemCount(group);
group++;
continue;
}
if (i == 0) {
onBindGroupViewHolder((GVH) holder, group);
return;
}
}
throw new IndexOutOfBoundsException();
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return viewType == TYPE_HEADER ? onCreateGroupViewHolder(parent) : onCreateChildViewHolder(parent, viewType);
}
protected abstract GVH onCreateGroupViewHolder(ViewGroup parent);
protected abstract CVH onCreateChildViewHolder(ViewGroup parent, int viewType);
public abstract int getChildItemViewType(int group, int position);
#Override
public int getItemViewType(int i) {
int group = 0;
while (group <= getGroupItemCount()) {
if (i > 0 && !isExpanded(group)) {
i--;
group++;
continue;
}
if (i > 0 && isExpanded(group)) {
i--;
if (i < getChildItemCount(group))
return getChildItemViewType(group, i);
i -= getChildItemCount(group);
group++;
continue;
}
if (i == 0)
return TYPE_HEADER;
}
throw new IndexOutOfBoundsException();
}
public void setOnChildItemClickedListener(OnChildItemClickedListener onItemClickedListener) {
this.onChildItemClickedListener = onItemClickedListener;
}
public void onBindChildViewHolder(CVH holder, final int group, final int position) {
holder.itemView.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (Adapter.this.onChildItemClickedListener != null) {
Adapter.this.onChildItemClickedListener.onChildItemClicked(group, position);
}
}
});
}
public void onBindGroupViewHolder(final GVH holder, final int group) {
if (holder instanceof GroupViewHolder)
((GroupViewHolder) holder).setExpanded(isExpanded(group));
holder.itemView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (isExpanded(group)) {
collapse(group);
if (holder instanceof GroupViewHolder)
((GroupViewHolder) holder).collapse();
} else {
expand(group);
if (holder instanceof GroupViewHolder)
((GroupViewHolder) holder).expand();
}
}
});
}
}
public static abstract class GroupViewHolder extends ViewHolder {
public GroupViewHolder(View itemView) {
super(itemView);
}
public abstract void expand();
public abstract void collapse();
public abstract boolean isExpanded();
public abstract void setExpanded(boolean expanded);
}
public static class SimpleGroupViewHolder extends GroupViewHolder {
ImageView expandedIndicator;
TextView text;
private boolean expanded;
public SimpleGroupViewHolder(Context context) {
super(View.inflate(context, R.layout.group_header, null));
itemView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
expandedIndicator = (ImageView) itemView.findViewById(R.id.carbon_groupExpandedIndicator);
text = (TextView) itemView.findViewById(R.id.carbon_groupText);
}
public SimpleGroupViewHolder(Context context, int layout) {
super(View.inflate(context, layout, null));
itemView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
expandedIndicator = (ImageView) itemView.findViewById(R.id.carbon_groupExpandedIndicator);
text = (TextView) itemView.findViewById(R.id.carbon_groupText);
}
public void expand() {
ValueAnimator animator = ValueAnimator.ofFloat(0, 1);
animator.setInterpolator(new DecelerateInterpolator());
animator.setDuration(200);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
ViewHelper.setRotation(expandedIndicator, 180 * (float) (animation.getAnimatedValue()));
expandedIndicator.postInvalidate();
}
});
animator.start();
expanded = true;
}
public void collapse() {
ValueAnimator animator = ValueAnimator.ofFloat(1, 0);
animator.setInterpolator(new DecelerateInterpolator());
animator.setDuration(200);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
ViewHelper.setRotation(expandedIndicator, 180 * (float) (animation.getAnimatedValue()));
expandedIndicator.postInvalidate();
}
});
animator.start();
expanded = false;
}
#Override
public boolean isExpanded() {
return expanded;
}
public void setExpanded(boolean expanded) {
ViewHelper.setRotation(expandedIndicator, expanded ? 180 : 0);
this.expanded = expanded;
}
public String getText() {
return text.getText().toString();
}
public void setText(String t) {
text.setText(t);
}
}
}
the adapters are the same except for the data so I will put one example:
Adapter code example:
public class Adapter extends ExpandableRecyclerView.Adapter<Adapter.ChildViewHolder, Adapter.GroupViewHolder, String, String> {
private DatabaseHelper db;
private ArrayList List;
private int layout;
public Adapter(Context c, int resource) {
layout = resource;
db = new DatabaseHelper(c);
List = db.getRecords();//returns list
}
#Override
public int getGroupItemCount() {
return List.size() - 1;
}
#Override
public int getChildItemCount(int i) {
return 1;
}
#Override
public String getGroupItem(int i) {
return null;
}
#Override
public String getChildItem(int group, int child) {
return null;
}
#Override
protected GroupViewHolder onCreateGroupViewHolder(ViewGroup parent) {
return new GroupViewHolder(parent.getContext(), layout);
}
#Override
protected ChildViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
View rootView = LayoutInflater.from(parent.getContext()).inflate(R.layout.group_item, parent, false);
return new ChildViewHolder(rootView);
}
#Override
public void onBindGroupViewHolder(GroupViewHolder holder, int group) {
super.onBindGroupViewHolder(holder, group);
holder.setText1("A");
holder.setText2("B");
}
#Override
public void onBindChildViewHolder(ChildViewHolder holder, int group, int position) {
super.onBindChildViewHolder(holder, group, position);
holder.t1.setText("t1");
holder.t2.setText("t2");
holder.t3.setText("t3");
holder.t4.setText("t4");
}
#Override
public int getChildItemViewType(int i, int i1) {
return 1;
}
static class GroupViewHolder extends ExpandableRecyclerView.GroupViewHolder {
ImageView expandedIndicator;
TextView text1;
TextView text2;
private boolean expanded;
GroupViewHolder(Context context, int layout) {
super(View.inflate(context, layout, null));
itemView.setLayoutParams(new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
expandedIndicator = (ImageView) itemView.findViewById(R.id.groupExpandedIndicator);
text1 = (TextView) itemView.findViewById(R.id.text1);
text2 = (TextView) itemView.findViewById(R.id.text2);
}
public void expand() {
ValueAnimator animator = ValueAnimator.ofFloat(0, 1);
animator.setInterpolator(new DecelerateInterpolator());
animator.setDuration(200);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
ViewHelper.setRotation(expandedIndicator, 180 * (float) (animation.getAnimatedValue()));
expandedIndicator.postInvalidate();
}
});
animator.start();
expanded = true;
}
public void collapse() {
ValueAnimator animator = ValueAnimator.ofFloat(1, 0);
animator.setInterpolator(new DecelerateInterpolator());
animator.setDuration(200);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
ViewHelper.setRotation(expandedIndicator, 180 * (float) (animation.getAnimatedValue()));
expandedIndicator.postInvalidate();
}
});
animator.start();
expanded = false;
}
#Override
public boolean isExpanded() {
return expanded;
}
public void setExpanded(boolean expanded) {
ViewHelper.setRotation(expandedIndicator, expanded ? 180 : 0);
this.expanded = expanded;
}
void setText1(String t) {
text1.setText(t);
}
void setText2(String t) {
text2.setText(t);
}
}
class ChildViewHolder extends RecyclerView.ViewHolder {
private TextView t1;
private TextView t2;
private TextView t3;
private TextView t4;
ChildViewHolder(View itemView) {
super(itemView);
t1 = (TextView) itemView.findViewById(R.id.tv1);
t2 = (TextView) itemView.findViewById(R.id.tv2);
t3 = (TextView) itemView.findViewById(R.id.tv3);
t4 = (TextView) itemView.findViewById(R.id.tv4);
}
}
}
group_header.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true">
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/Card1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="10dp"
card_view:cardCornerRadius="10dp"
card_view:cardElevation="5dp">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:orientation="horizontal">
<TextView
android:id="#+id/text1"
style="#style/MyLargeTextAppearance"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:padding="16dp"
android:textColor="#color/highlight"
android:textStyle="bold" />
</LinearLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/Card1"
android:layout_gravity="center"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="1dp"
card_view:cardCornerRadius="10dp"
card_view:cardElevation="5dp">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:orientation="horizontal">
<TextView
android:id="#+id/text2"
style="#style/MyLargeTextAppearance"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:padding="16dp"
android:textColor="#color/highlight"
android:textStyle="bold" />
<ImageView
android:id="#+id/groupExpandedIndicator"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_gravity="center_vertical"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
app:srcCompat="#drawable/ic_expand_more" />
</LinearLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
group_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="10dp"
card_view:cardCornerRadius="10dp"
card_view:cardElevation="5dp">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/materialGray"
android:orientation="vertical"
android:padding="#dimen/activity_horizontal_margin">
<TextView
android:id="#+id/t1"
style="#style/MyLargeTextAppearance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/separatorViewBackground" />
<TextView
android:id="#+id/t2"
style="#style/MyLargeTextAppearance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/separatorViewBackground" />
<TextView
android:id="#+id/t3"
style="#style/MyLargeTextAppearance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/separatorViewBackground" />
<TextView
android:id="#+id/t4"
style="#style/MyLargeTextAppearance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView" />
</LinearLayout>
</android.support.v7.widget.CardView>

Try changing to:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.rv, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.rv);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(new a_Adapter(getContext(), R.layout.group_header));
return recyclerView;
}

how to display multiply layout in RecyclerView [duplicate]

This question already has answers here:
How to create RecyclerView with multiple view types
(23 answers)
Closed 6 years ago.
I am getting data in jSON. Data contains images url. I am trying to display images in below layouts.
1Image
2Image
3Image 4Image 5Image 6Image 7image
8Image 9Image 10Image 11Image 12image
13image 14image 15image 16image 17image
.... .... ..... ...... .....
So First two image will be in vertically. Other 5 images in horizontal scroll view and so on.
So i am using RecyclerView with vertical orientation. but i am not able to creating the logic so images will be display above format.
please anyone guide me.
update:-
//Horizontal images view.
public class MoviesAdapterHorizontal extends RecyclerView.Adapter<MoviesAdapterHorizontal.MyViewHolder> {
private List<String> moviesList;
// private ThumbnailListener thumbnailListener;
public class MyViewHolder extends RecyclerView.ViewHolder {
// YouTubeThumbnailView thumbnail;
ImageView imageView2;
public MyViewHolder(View view) {
super(view);
// thumbnail = (YouTubeThumbnailView) view.findViewById(R.id.thumbnail);
imageView2 = (ImageView) view.findViewById(R.id.imageView2);
}
}
public MoviesAdapterHorizontal(List<String> moviesList) {
this.moviesList = moviesList;
// thumbnailListener = new ThumbnailListener();
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.hotrow2, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final String url = moviesList.get(position);
System.out.println("movie url = " + url);
final String m = url.substring(url.lastIndexOf('/') + 1);
System.out.println("url = "+m);
int w = BasicDeviceInfo.getWidth(getActivity());
// int h = BasicDeviceInfo.getHeight(getActivity());
LinearLayout.LayoutParams lParams =
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
w/3);
AQuery aq = new AQuery(holder.imageView2);
aq.id(holder.imageView2).image("http://x.x.x.231/news-flicks/uploads/home/tulips_e84aa48cee1a2a25aef001cd74152663.jpg", true, true, 0,
R.drawable.no_thumbnail);
holder.imageView2.setLayoutParams(lParams);
// holder.thumbnail.setLayoutParams(lParams);
/* holder.thumbnail.setTag(m);
holder.thumbnail.initialize("AIzaSyDW-sxPUqy2rD6ZWs3vTNb0jKEKA21RjrY", thumbnailListener);
holder.thumbnail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), FullscreenDemoActivity.class);
intent.putExtra("url",m);
intent.putExtra("txt", "");
startActivity(intent);
}
});*/
}
#Override
public int getItemCount() {
return moviesList.size();
}
private final class ThumbnailListener implements
YouTubeThumbnailView.OnInitializedListener,
YouTubeThumbnailLoader.OnThumbnailLoadedListener {
#Override
public void onInitializationSuccess(
YouTubeThumbnailView view, YouTubeThumbnailLoader loader) {
loader.setOnThumbnailLoadedListener(this);
String videoId = (String) view.getTag();
loader.setVideo(videoId);
}
#Override
public void onInitializationFailure(
YouTubeThumbnailView view, YouTubeInitializationResult loader) {
view.setImageResource(R.drawable.no_thumbnail);
}
#Override
public void onThumbnailLoaded(YouTubeThumbnailView view, String videoId) {
}
#Override
public void onThumbnailError(YouTubeThumbnailView view, YouTubeThumbnailLoader.ErrorReason errorReason) {
view.setImageResource(R.drawable.no_thumbnail);
}
}
}
horizontal xml:-
<?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="vertical"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/imageView2"
android:src="#drawable/no_thumbnail"/>
</LinearLayout>
i am calling it parent recycle view onBindViewHolder()
#Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
Videos movie = moviesList.get(position);
System.out.println("Image = " + movie.getImage());
int w = BasicDeviceInfo.getWidth(getActivity());
// int h = BasicDeviceInfo.getHeight(getActivity());
if(position < 2) {
final List<String> lst = new ArrayList<String>();
lst.add(movie.getVideo_url());
lst.add(movie.getVideo_url());
lst.add(movie.getVideo_url());
lst.add(movie.getVideo_url());
lst.add(movie.getVideo_url());
final MoviesAdapterHorizontal adapter = new MoviesAdapterHorizontal(lst);
holder.recyclerView2.setAdapter(adapter);
adapter.notifyDataSetChanged();
Now my horizontal onBindViewHolder is calling and able to see log messages. But ImageView is not displaying. i think it is hiding or overlapping

See onto this Answer for how to make different layout item in RecyclerView
For first two element layout file containing ImageView
For rest item view I will suggest take Horizontal RecyclerView as item
My Custom view for Horizontal RecyclerView
public class DocumentViewDynamic extends LinearLayout {
private static final String LOG_TAG = DocumentViewDynamic.class.getSimpleName();
private final String titleStr;
private OnDocumentItemClicked callBack;
public void updateImage(Bitmap bitmap, int postionOfView) {
Log.e(LOG_TAG, "updateImage: ");
documentAdapter.setImageFromCamera(bitmap, postionOfView);
}
public interface OnDocumentItemClicked {
void onDocumentItemClicked(View v, int position);
}
public void setItemClickedListener(OnDocumentItemClicked callBack) {
this.callBack = callBack;
}
#Bind(R.id.title)
TextView title;
#Bind(R.id.img_add)
FloatingActionButton imgAdd;
private DocumentAdapter documentAdapter;
private final Context context;
#Bind(R.id.rv_document)
RecyclerView rvDocument;
#OnClick(R.id.img_add)
public void addDummyImage() {
documentAdapter.addSingelDummyImage();
rvDocument.scrollToPosition(documentAdapter.getItemCount() - 1);
}
public DocumentViewDynamic(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.DocumentViewDynamic, 0, 0);
try {
titleStr = ta.getString(R.styleable.DocumentViewDynamic_titleDoc);
} finally {
ta.recycle();
}
init();
}
public ArrayList<DocumentModel> getAllImageData() {
return documentAdapter.getImageData();
}
private void init() {
setOrientation(VERTICAL);
View view = LayoutInflater.from(context).inflate(R.layout.compund_view_document, this);
ButterKnife.bind(this, view);
if (!TextUtils.isEmpty(titleStr))
title.setText(titleStr);
initRecyclerView();
}
private void initRecyclerView() {
rvDocument.setLayoutManager(new LinearLayoutManager(context, HORIZONTAL, false));
ArrayList<DocumentModel> documentModels = new ArrayList<>();
documentAdapter = new DocumentAdapter(documentModels);
rvDocument.setAdapter(documentAdapter);
}
public class DocumentAdapter extends RecyclerView.Adapter<DocumentAdapter.DocViewHolder> {
public ArrayList<DocumentModel> getImageData() {
return documentModels;
}
private ArrayList<DocumentModel> documentModels = new ArrayList<>();
public DocumentAdapter(ArrayList<DocumentModel> documentModels) {
this.documentModels = documentModels;
if (documentModels.size() == 0)
documentModels.add(new DocumentModel());
}
#Override
public DocViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_compund_document, parent, false);
return new DocViewHolder(view);
}
#Override
public void onBindViewHolder(final DocViewHolder holder, int position) {
if (documentModels.get(position).getBitmap() == null) {
holder.imgDocument.setImageResource(R.drawable.camera);
holder.imgBtnDelete.setVisibility(GONE);
} else {
holder.imgDocument.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
holder.imgDocument.setScaleType(ImageView.ScaleType.FIT_XY);
holder.imgDocument.setImageBitmap(documentModels.get(position).getBitmap());
holder.imgBtnDelete.setVisibility(VISIBLE);
}
holder.itemView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
callBack.onDocumentItemClicked(DocumentViewDynamic.this, holder.getAdapterPosition());
}
});
holder.imgBtnDelete.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (holder.getAdapterPosition() == 0 && documentModels.size() == 1) {
documentModels.get(holder.getAdapterPosition()).setBitmap(null);
} else {
documentModels.remove(holder.getAdapterPosition());
}
notifyDataSetChanged();
}
});
}
#Override
public int getItemCount() {
return (documentModels != null && documentModels.size() > 0) ? documentModels.size() : 0;
}
public void setImageFromCamera(Bitmap imageFromCamera, int postionOfView) {
documentModels.get(postionOfView).setBitmap(imageFromCamera);
notifyDataSetChanged();
}
public class DocViewHolder extends RecyclerView.ViewHolder {
#Bind(R.id.img_document)
ImageView imgDocument;
#Bind(R.id.img_btn_delete)
ImageView imgBtnDelete;
public DocViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
public void addSingelDummyImage() {
if (documentModels.get(documentModels.size() - 1).getBitmap() != null) {
documentModels.add(new DocumentModel());
notifyDataSetChanged();
} else {
Snackbar.make(rvDocument, "Please Add image ", Snackbar.LENGTH_LONG).show();
}
}
}
}
layout file for compound view
<?xml version="1.0" encoding="utf-8"?>
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
android:textColor="#3399ff"
android:textSize="15dp"
android:textStyle="normal" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_document"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/img_add" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/img_add"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:src="#drawable/fab_plus_bg" />
</RelativeLayout>
Inflate this compound view as item in Vertical RecyclerView