如何更新“回收站”视图？

Question

I have one recycler View as a parent and a recycler view inside it. I want to update all of my parent recycler view's rows, when I am selecting a row from child recycler view.

In parent recycler view It have two textviews and one recycler view. The increase class and adapter class for parent recycler view is shown below.

   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    rv = (RecyclerView)findViewById(R.id.reviews);


    LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(this);
    rv.setLayoutManager(mLinearLayoutManager);
    Data();
     adapter = new Adapterclass(countryList,MainActivity.this);

    rv.setAdapter(adapter);
    rv.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(),rv,new ClickListener(){
        @Override
        public void onClick(View view, int position) {

            Log.e("position child",""+position);

            adapter = new Adapterclass(position);

        }

        @Override
        public void onLongClick(View view, int position) {

        }
    }));
}

Adapter class :

public class Adapterclass extends RecyclerView.Adapter<Adapterclass.MyViewHolder> {

private List<ModelMain> flist;
private List<Modelclass>carList;
Context c;
boolean set = false;
int positn;

public class MyViewHolder extends RecyclerView.ViewHolder {


    TextView text,currency;

    RecyclerView recycler;
    public MyViewHolder(View view) {
        super(view);
        text = (TextView)view.findViewById(R.id.gggg);
        currency= (TextView)view.findViewById(R.id.hhh);
        recycler = (RecyclerView)view.findViewById(R.id.rview2);

    }

}
public  Adapterclass(List<ModelMain> slist, Context c){
    this.flist = slist;
    this.c = c;
}

@Override
public Adapterclass.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.cell,parent,false);
    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(Adapterclass.MyViewHolder holder, final int position) {
    ModelMain fm = flist.get(position);

    holder.text.setText(fm.getName());
    holder.currency.setText(fm.getCurrency());

    carList = new ArrayList<>();
    carList = fm.getArrays();
    Log.d("list",""+carList.toString());
    LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(c);
    holder.recycler.setLayoutManager(mLinearLayoutManager);

    final Adapter_Inside adapter = new Adapter_Inside(carList,c);

    holder.recycler.setAdapter(adapter);

    holder.recycler.addOnItemTouchListener(new RecyclerTouchListener(c,holder.recycler,new ClickListener(){
        @Override
        public void onClick(View view, int pos) {
            ModelMain mm = flist.get(positn);

            carList = new ArrayList<>();
            carList = mm.getArrays();
            Modelclass mv = carList.get(pos);
            Log.e("valll", "" + carList.get(pos).getVal());

            Boolean bool = carList.get(pos).getVal();
            if(bool){

            }else{
                for(int i =0; i<carList.size();i++){
                    Modelclass cls = new Modelclass();
                 Boolean v = carList.get(i).getVal();
                    String text = carList.get(i).getText();
                    if(v){
                        cls.setVal(false);
                        cls.setText(text);

                        carList.set(i,cls);
                    }
                }
                mv.setVal(true);
                set  = true;
            }
            adapter.notifyDataSetChanged();


            }
       @Override
        public void onLongClick(View view, int position) {

        }
    }));


}
  public Adapterclass(int pos){
      this.positn = pos;


}
private void SetAdapr() {

    notifyDataSetChanged();
}

public interface ClickListener {
    void onClick(View view, int position);

    void onLongClick(View view, int position);
}
public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {

    private GestureDetector gestureDetector;
    private ClickListener clickListener;


    public RecyclerTouchListener(Context applicationContext, final RecyclerView rv, final ClickListener clickListener) {
        this.clickListener = clickListener;
        gestureDetector = new GestureDetector(applicationContext, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                View child = rv.findChildViewUnder(e.getX(), e.getY());
                if (child != null && clickListener != null) {
                    clickListener.onLongClick(child, rv.getChildPosition(child));

                }
            }
        });
    }


    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildPosition(child));
        }
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {

    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }

}
@Override
public int getItemCount() {
    return flist.size();
}

Model class for parent recycler view :

public class ModelMain {
String name;
String currency;
List<Modelclass> arrays ;

public ModelMain(String name, String currency, List<Modelclass> arrays) {
    this.name = name;
    this.currency = currency;
    this.arrays = arrays;
}

public String getName() {

    return name;
}

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

public String getCurrency() {
    return currency;
}

public void setCurrency(String currency) {
    this.currency = currency;
}

public List<Modelclass> getArrays() {
    return arrays;
}

public void setArrays(List<Modelclass> arrays) {
    this.arrays = arrays;
}
}

And my child recycler view adapter class is :

public class Adapter_Inside extends      RecyclerView.Adapter<Adapter_Inside.MyViewHolder> {

  private List<Modelclass>carList;
    Context c;
    public class MyViewHolder extends RecyclerView.ViewHolder {


    TextView text;
    ImageView iv;


    public MyViewHolder(View view) {
        super(view);
        text = (TextView)view.findViewById(R.id.textView);
       iv = (ImageView)view.findViewById(R.id.iview);


    }

    }
public  Adapter_Inside(List<Modelclass> slist, Context c){
    this.carList = slist;
    this.c = c;
}

@Override
public Adapter_Inside.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.secondcell,parent,false);
    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(Adapter_Inside.MyViewHolder holder, int position) {
    Modelclass fm = carList.get(position);

    holder.text.setText(fm.getText());
 if(fm.getVal()){
       holder.iv.setImageResource(R.drawable.ic_clear_black_18dp);
   }
    else{
       holder.iv.setImageResource(R.drawable.ic_done_black_16dp_2x);
   }
  }

@Override
public int getItemCount() {
    return carList.size();
}
}

And model class for child is :

public class Modelclass {

Boolean val;
String text;

public Boolean getVal() {
    return val;
}

public void setVal(Boolean val) {
    this.val = val;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}
}

I couldn't retrieve parent recycler view's position when clicking any row in the child view.please help.

Answer 1

You can get reference to your parent RecyclerView by passing it in the Adapter contructor.

public  Adapterclass(RecyclerView parent, List<ModelMain> slist, Context c){
   this.flist = slist;
   this.c = c;
   this.recyclerView = parent;
}

Then you can use recycler parent reference and his methods to retrieve all you need