Java Recyclerview在Recyclerview中，获取父适配器中子行的单击位置
在我的项目要求是，因为有项目列表显示在活动中&我在列表中显示日期和价格，我想要的是用户将选择日期，日期颜色将改变，当点击购物车项目应添加到卡 问题：我无法在父recyclerViewJava Recyclerview在Recyclerview中，获取父适配器中子行的单击位置,java,android,android-recyclerview,Java,Android,Android Recyclerview,在我的项目要求是，因为有项目列表显示在活动中&我在列表中显示日期和价格，我想要的是用户将选择日期，日期颜色将改变，当点击购物车项目应添加到卡 问题：我无法在父recyclerViewonBindViewHolder中获取子recyclerView位置 是否有任何方法可以在父reyclerview中获取子行（日期行）的位置 下图显示了三个列表，每个列表中都有日期行列表。当用户点击特定日期时，我希望在onBindViewHolder内的父recyclerView适配器类上显示该日期 下面是适配器：
onBindViewHolder中获取子recyclerView位置
是否有任何方法可以在父reyclerview中获取子行（日期行）的位置
下图显示了三个列表，每个列表中都有日期行列表。当用户点击特定日期时，我希望在onBindViewHolder内的父recyclerView适配器类上显示该日期
下面是适配器：
public interface RecyclerClickInterface {
void onClick(View view, int position);
}
holder.adapter = new CalenderAdapter(context, listCal, new RecyclerClickInterface() {
@Override
public void onClick(View view, int position) {
Log.i(TAG, "position " + position);
}
});
holder.item.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mRecyclerClickInterface.onClick(view, position);
}
});
下面是父适配器类
FlowerListAdapter.java：
public class FlowerListAdapter extends RecyclerView.Adapter<FlowerListAdapter.MyViewHolder> {
ArrayList<FlowerListPojo> list;
Context context;
public FlowerListAdapter(Context context, ArrayList<FlowerListPojo> list) {
this.context = context;
this.list = list;
}
//Pagination
public void updateList(ArrayList<FlowerListPojo> list) {
this.list.addAll(list);
this.notifyDataSetChanged();
}
@Override
public FlowerListAdapter.MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.flower_list_row, viewGroup, false);
return new FlowerListAdapter.MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(FlowerListAdapter.MyViewHolder holder, int position) {
LinearLayoutManager mLayoutManager;
holder.name.setText(list.get(position).getInfo().getName());
ArrayList<CalenderPojo> listCal = new ArrayList<>();
Glide.with(context).load(list.get(position).getInfo().getImage())
.thumbnail(0.5f)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(holder.imageFlower);
mLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
holder.recyclerView.setLayoutManager(mLayoutManager);
holder.recyclerView.setItemAnimator(new DefaultItemAnimator());
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
//todays date
Date cToday = Calendar.getInstance().getTime();
String todaysDate = df.format(cToday);
//last day last next 90 days
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, 90);
Date d = c.getTime();
String lastDate = df.format(d);
List<Date> dates = getDates(todaysDate, lastDate);
for (Date date : dates) {
String dayOfTheWeek = (String) DateFormat.format("EEE", date); // Thursday
String day = (String) DateFormat.format("dd", date); // 20
String monthString = (String) DateFormat.format("MMMM", date); // Jun
String monthNumber = (String) DateFormat.format("MM", date); // 06
String year = (String) DateFormat.format("yyyy", date); // 2013
listCal.add(new CalenderPojo(dayOfTheWeek, day, "200", monthString + " " + year));
}
holder.recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
int firstVisiblePosition = mLayoutManager.findFirstVisibleItemPosition();
if(firstVisiblePosition>=0)
holder.monthName.setText(listCal.get(firstVisiblePosition+3).getMonth());
}
});
holder.recyclerView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
//Date send to Adapter / Constructor call
holder.adapter = new CalenderAdapter(context, listCal);
holder.recyclerView.setAdapter(holder.adapter);
}
@Override
public int getItemCount() {
if (list.size() != 0)
return list.size();
else return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView name;
ImageView imageFlower;
RecyclerView recyclerView;
TextView monthName;
CalenderAdapter adapter;
public MyViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.flowerNameFLR);
imageFlower = itemView.findViewById(R.id.flowerImgFLR);
recyclerView = itemView.findViewById(R.id.recycler_view_calender);
monthName = itemView.findViewById(R.id.monthName);
}
}
private static List<Date> getDates(String dateString1, String dateString2) {
ArrayList<Date> dates = new ArrayList<Date>();
java.text.DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");
Date date1 = null;
Date date2 = null;
try {
date1 = df1.parse(dateString1);
date2 = df1.parse(dateString2);
} catch (ParseException e) {
e.printStackTrace();
}
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
while (!cal1.after(cal2)) {
dates.add(cal1.getTime());
cal1.add(Calendar.DATE, 1);
}
return dates;
}
}
公共类FlowerListAdapter扩展了RecyclerView.Adapter{
数组列表；
语境；
公共FlowerListAdapter（上下文、ArrayList列表）{
this.context=上下文；
this.list=列表；
}
//分页
公共无效更新列表（ArrayList列表）{
this.list.addAll（list）；
this.notifyDataSetChanged（）；
}
@凌驾
public FlowerListAdapter.MyViewHolder onCreateViewHolder（ViewGroup ViewGroup，int viewType）{
View itemView=LayoutFlater.from（viewGroup.getContext（））。充气（R.layout.flower\u list\u行，viewGroup，false）；
返回新的FlowerListAdapter.MyViewHolder（itemView）；
}
@凌驾
BindViewHolder上的公共无效（FlowerListAdapter.MyViewHolder，int位置）{
直线布局经理mLayoutManager；
holder.name.setText（list.get（position.getInfo（）.getName（））；
ArrayList listCal=新的ArrayList（）；
Glide.with（context）.load（list.get（position.getInfo（）.getImage（））
.缩略图（0.5f）
.crossFade（）
.diskCacheStrategy（diskCacheStrategy.ALL）
.插入（支架.图像花）；
mLayoutManager=新的LinearLayoutManager（上下文，LinearLayoutManager.HORIZONTAL，false）；
holder.recyclerView.setLayoutManager（MLLayoutManager）；
holder.recyclerView.setItemAnimator（新的DefaultItemAnimator（））；
SimpleDataFormat df=新SimpleDataFormat（“yyyy-MM-dd”）；
//今天的日期
Date=Calendar.getInstance（）.getTime（）；
字符串todaysDate=df.format（cToday）；
//最后一天最后一个90天
Calendar c=Calendar.getInstance（）；
c、 添加（日历日期，90）；
日期d=c.getTime（）；
字符串lastDate=df.format（d）；
列表日期=getDates（todaysDate，lastDate）；
用于（日期：日期）{
String dayOfWeek=（String）DateFormat.format（“EEE”，date）；//星期四
String day=（String）DateFormat.format（“dd”，date）；//20
String monthString=（String）DateFormat.format（“MMMM”，date）；//Jun
String monthNumber=（String）DateFormat.format（“MM”，date）；//06
字符串年份=（字符串）日期格式。格式（“yyyy”，日期）；//2013
添加（新日历POJO（星期一，天，“200”，月弦+“+年”）；
}
holder.recyclerView.addOnScrollListener（新的recyclerView.OnScrollListener（）{
@凌驾
已填空的公共空间（RecyclerView RecyclerView、int dx、int dy）{
int firstVisiblePosition=mLayoutManager.findFirstVisibleItemPosition（）；
如果（firstVisiblePosition>=0）
holder.monthName.setText（listCal.get（firstVisiblePosition+3.getMonth（））；
}
});
holder.recyclerView.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
}
});
//发送到适配器/构造函数调用的日期
holder.adapter=新的压延机适配器（上下文，列表）；
holder.recyclerView.setAdapter（holder.adapter）；
}
@凌驾
public int getItemCount（）{
如果（list.size（）！=0）
返回list.size（）；
否则返回0；
}
类MyViewHolder扩展了RecyclerView.ViewHolder{
文本视图名称；
ImageView imageFlower；
回收视图回收视图；
TextView monthName；
压延机适配器；
公共MyViewHolder（查看项目视图）{
超级（项目视图）；
name=itemView.findviewbyd（R.id.flowerNameFLR）；
imageFlower=itemView.findViewById（R.id.flowerImgFLR）；
recyclerView=itemView.findViewById（R.id.recycler\u view\u Calendar）；
monthName=itemView.findViewById（R.id.monthName）；
}
}
私有静态列表getDates（字符串dateString1，字符串dateString2）{
ArrayList日期=新建ArrayList（）；
java.text.DateFormat df1=新的SimpleDataFormat（“yyyy-MM-dd”）；
Date date1=null；
日期2=空；
试一试{
date1=df1.parse（dateString1）；
date2=df1.parse（dateString2）；
}捕获（解析异常）{
e、 printStackTrace（）；
}
Calendar cal1=Calendar.getInstance（）；
cal1.设置时间（日期1）；
Calendar cal2=Calendar.getInstance（）；
计算2.设置时间（日期2）；
而（！cal1.在（cal2）之后）{
add（cal1.getTime（））；
cal1.add（Calendar.DATE，1）；
}
返回日期；
}
}
下面是子适配器类
CalenderAdapter.java
public class CalenderAdapter extends RecyclerView.Adapter<CalenderAdapter.MyViewHolder> {
ArrayList<CalenderPojo> list;
Context context;
private int mSelectedItem = -1;
public CalenderAdapter(Context context, ArrayList<CalenderPojo> listCal) {
this.context = context;
this.list = listCal;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.date_row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final CalenderPojo listPotn = list.get(position);
holder.day.setText(listPotn.getDay());
holder.date.setText(listPotn.getDate());
holder.price.setText("$ "+listPotn.getPrice());
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mSelectedItem = position;
notifyDataSetChanged();
// ((FlowerListAdapter)context).sendTimedetails(position);
}
});
if (mSelectedItem==position) {
holder.itemView.setBackgroundResource(R.drawable.selected_date_back);
holder.day.setTextColor(context.getResources().getColor(R.color.white));
holder.date.setTextColor(context.getResources().getColor(R.color.white));
holder.price.setTextColor(context.getResources().getColor(R.color.white));
} else {
holder.linearLayout.setBackgroundColor(context.getResources().getColor(R.color.primaryLight2));
holder.day.setTextColor(context.getResources().getColor(R.color.black));
holder.date.setTextColor(context.getResources().getColor(R.color.black));
holder.price.setTextColor(context.getResources().getColor(R.color.black));
}
}
@Override
public int getItemCount() {
if (list.size() != 0 && list !=null)
return list.size();
else return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView day, date, price;
LinearLayout linearLayout;
public MyViewHolder(View itemView) {
super(itemView);
day = itemView.findViewById(R.id.day);
date = itemView.findViewById(R.id.date);
price = itemView.findViewById(R.id.price);
linearLayout = itemView.findViewById(R.id.lLayout);
}
}
}
公共类CalenderAdapter扩展了RecyclerView.Adapter{
数组列表；
语境；
private int mSelectedItem=-1；
公共日历适配器（上下文，ArrayList listCal）{
this.context=上下文；
this.list=listCal；
}
@凌驾
公共MyViewHolder onCreateViewHolder（视图组父级，int-viewType）{
视图项视图=平面布局
holder.adapter = new CalenderAdapter(context, listCal, new RecyclerClickInterface() {
@Override
public void onClick(View view, int position) {
Log.i(TAG, "position " + position);
}
});
holder.item.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mRecyclerClickInterface.onClick(view, position);
}
});
public interface ClickPosition {
public void getPosition(int position);
}
public class FlowerListAdapter extends RecyclerView.Adapter<FlowerListAdapter.MyViewHolder> {
ArrayList<FlowerListPojo> list;
Context context;
ClickPosition clickPosition;
public FlowerListAdapter(Context context, ArrayList<FlowerListPojo> list) {
this.context = context;
this.list = list;
}
//Pagination
public void updateList(ArrayList<FlowerListPojo> list) {
this.list.addAll(list);
this.notifyDataSetChanged();
}
@Override
public FlowerListAdapter.MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.flower_list_row, viewGroup, false);
return new FlowerListAdapter.MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(FlowerListAdapter.MyViewHolder holder, int position) {
LinearLayoutManager mLayoutManager;
holder.name.setText(list.get(position).getInfo().getName());
ArrayList<CalenderPojo> listCal = new ArrayList<>();
Glide.with(context).load(list.get(position).getInfo().getImage())
.thumbnail(0.5f)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(holder.imageFlower);
mLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
holder.recyclerView.setLayoutManager(mLayoutManager);
holder.recyclerView.setItemAnimator(new DefaultItemAnimator());
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
//todays date
Date cToday = Calendar.getInstance().getTime();
String todaysDate = df.format(cToday);
//last day last next 90 days
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, 90);
Date d = c.getTime();
String lastDate = df.format(d);
List<Date> dates = getDates(todaysDate, lastDate);
for (Date date : dates) {
String dayOfTheWeek = (String) DateFormat.format("EEE", date); // Thursday
String day = (String) DateFormat.format("dd", date); // 20
String monthString = (String) DateFormat.format("MMMM", date); // Jun
String monthNumber = (String) DateFormat.format("MM", date); // 06
String year = (String) DateFormat.format("yyyy", date); // 2013
listCal.add(new CalenderPojo(dayOfTheWeek, day, "200", monthString + " " + year));
}
holder.recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
int firstVisiblePosition = mLayoutManager.findFirstVisibleItemPosition();
if(firstVisiblePosition>=0)
holder.monthName.setText(listCal.get(firstVisiblePosition+3).getMonth());
}
});
holder.recyclerView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
//Date send to Adapter / Constructor call
holder.adapter = new CalenderAdapter(context, listCal,clickPosition);
holder.recyclerView.setAdapter(holder.adapter);
}
@Override
public int getItemCount() {
if (list.size() != 0)
return list.size();
else return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView name;
ImageView imageFlower;
RecyclerView recyclerView;
TextView monthName;
CalenderAdapter adapter;
public MyViewHolder(View itemView) {
super(itemView);
clickPosition= new ClickPosition() {
@Override
public void getPosition(int position) {
Toast.makeText(context, ""+position, Toast.LENGTH_SHORT).show();
}
};
name = itemView.findViewById(R.id.flowerNameFLR);
imageFlower = itemView.findViewById(R.id.flowerImgFLR);
recyclerView = itemView.findViewById(R.id.recycler_view_calender);
monthName = itemView.findViewById(R.id.monthName);
}
}
private static List<Date> getDates(String dateString1, String dateString2) {
ArrayList<Date> dates = new ArrayList<Date>();
java.text.DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");
Date date1 = null;
Date date2 = null;
try {
date1 = df1.parse(dateString1);
date2 = df1.parse(dateString2);
} catch (ParseException e) {
e.printStackTrace();
}
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
while (!cal1.after(cal2)) {
dates.add(cal1.getTime());
cal1.add(Calendar.DATE, 1);
}
return dates;
}
}
public class CalenderAdapter extends RecyclerView.Adapter<CalenderAdapter.MyViewHolder> {
ArrayList<CalenderPojo> list;
Context context;
private int mSelectedItem = -1;
ClickPosition clickPosition;
public CalenderAdapter(Context context, ArrayList<CalenderPojo> listCal, ClickPosition clickPosition) {
this.context = context;
this.list = listCal;
this.clickPosition = clickPosition;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.date_row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final CalenderPojo listPotn = list.get(position);
holder.day.setText(listPotn.getDay());
holder.date.setText(listPotn.getDate());
holder.price.setText("$ "+listPotn.getPrice());
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mSelectedItem = position;
notifyDataSetChanged();
clickPosition.getPosition(position);
};
// ((FlowerListAdapter)context).sendTimedetails(position);
}
});
if (mSelectedItem==position) {
holder.itemView.setBackgroundResource(R.drawable.selected_date_back);
holder.day.setTextColor(context.getResources().getColor(R.color.white));
holder.date.setTextColor(context.getResources().getColor(R.color.white));
holder.price.setTextColor(context.getResources().getColor(R.color.white));
} else {
holder.linearLayout.setBackgroundColor(context.getResources().getColor(R.color.primaryLight2));
holder.day.setTextColor(context.getResources().getColor(R.color.black));
holder.date.setTextColor(context.getResources().getColor(R.color.black));
holder.price.setTextColor(context.getResources().getColor(R.color.black));
}
}
@Override
public int getItemCount() {
if (list.size() != 0 && list !=null)
return list.size();
else return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView day, date, price;
LinearLayout linearLayout;
public MyViewHolder(View itemView) {
super(itemView);
day = itemView.findViewById(R.id.day);
date = itemView.findViewById(R.id.date);
price = itemView.findViewById(R.id.price);
linearLayout = itemView.findViewById(R.id.lLayout);
}
}
}