当TextView不在recyclerView的行中时，如何在Adapter类中获取活动的TextView？

Question

How to get TextView of an Activity in RecyclerViewAdapter class and TextView is not in layout of row For RecyclerView item.As in RecyclerViewAdapter we override method

onBindViewHolder(ViewHolder holder, int position){
   NewsModel newsModel=values.get(position);  //to get the current object
        holder.news_title.setText(newsModel.getTitle());
        holder.news_body.setText(newsModel.getDescription());
        holder.news_published_at.setText("Date "+GiveMeDate(values.get(position).getDate()));}  

and as it get only those which are declared in ViewHolder extends RecyclerView.ViewHolder and ViewHolder will only get ui that are in View v = inflater.inflate(R.layout.news_item, parent, false); but I want to get ui from activity's layout so that I can update TextView value in Adapter So please Help to do that work. Image to reflect Layout is as follows:

Answer 1

• You should pass Textview as a parameter in adapter when you pass from activity
• Second you should done this by using interface.
• Another option is you can get textview by using Object of Activity.

like this MyActivity.java

 MyActivity myActivity;
 public TextView tv_name;

Adapter.java

myActivity.tv_name.setText("InsaneCat");

Hope this help you

Answer 2

I find that the UI of Activity to be used in Adapter class. We should make it static in Activity and then make a static method to update its value, after that whenever we want to change its value from Adapter we will call that static method with actual parameter and it will be updated .I do it as follows

In Activity

  public static TextView counter_value;
   public static  void update_counter(String value){
        try{
            counter_value.setText(value);
        }
        catch (Exception ex){
            Log.d("Exception","Exception of type"+ex.getMessage());
        }
    }

In Adapter class just call that static method

News.update_counter(String.valueOf(counter));

Answer 3

得到它

TextView requiredTextView = (TextView) ActivityName.findViewById(R.id.requiredTextView);