Android Firebase pass data recyclerview to recyclerview-CodePudding

I want to pass data RC_1 to RC_2. How can I do this(cat, info, orderid) RecyclerView to RecyclerView?Examp.pic_1

My firebase node is like as to picture. My firebase node

//RC_1 Struct

 public class Name_Struct {
        private String name;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    }

//RC_2 Struct

public class Detail_Struct {
    private String cat;
    private String info;
    private String orderid;

public String getCat() {
    return cat;
}
public void setCat(String cat) {
    this.cat = cat;
}
public String getInfo() {
    return info;
}
public void setInfo(String info) {
    this.info = info;
}
public String getOrderid() {
    return orderid;
}
public void setOrderid(String orderid) {
    this.orderid = orderid;
}

RC_1 for; //Myactivity_1

private void rc_1_get_name(){
    Query query = FirebaseDatabase.getInstance().getReference()
            .child(“Pro_”);
    query.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            mName.clear();
            for(DataSnapshot snp : snapshot.getChildren()){
                Name_Struct names = snp.getValue(Name_Struct.class);
                for (DataSnapshot recipeSnapshot: snp.child(“basket”).getChildren()) {
                    mName.add(names);
                }
            }
            mName_adapter.notifyDataSetChanged();
        }
        @Override
        public void onCancelled(@NonNull DatabaseError error) {
        }
    });
}

RC_1 for; //Myadapter_ 1

@Override public void onBindViewHolder(@NonNull ViewHolder holder, @SuppressLint("RecyclerView") int position) {

    final Name_Struct names = mName.get(position);
    holder.name_.setText(names.getName()));

holder.relativeLayout.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
Intent intent = new Intent(mContext, RC_2.class);

???

mContext.startActivity(intent);

}

}

CodePudding user response：

As I see in your screenshot, the "Pro_" node contains a name that has the value of "Mike". This means that you can map that node into an object of type Name_Struct. And you are doing that successfully. Under the same node, there is however another node called "Basket". That node is represented by a Map object, where the keys are represented by those IDs (ID_1, ID_2, etc) and the value by Detail_Struct objects. To be able to map the data under the "Basket" node, you have to add a new property in your Name_Struct class called basket like this:

public class Name_Struct implements Serializable {
   private String name;
   private Map<String, Object> basket;

   public String getName() {
       return name;
   }

   public void setName(String name) {
       this.name = name;
   }

   @PropertyName("Basket")
   public Map<String, Object> getBasket() {
       return basket;
   }

   public void setBasket(Map<String, Object> basket) {
       this.basket = basket;
   }
}

Now to pass the data to the second activity, you have to add iterate the Map and create a List<Detail_Struct> that can be added to the Intent so it can be read in the second activity.